2 // expression.cs: Expression representation for the IL tree.
5 // Miguel de Icaza (miguel@ximian.com)
6 // Marek Safar (marek.safar@gmail.com)
8 // Copyright 2001, 2002, 2003 Ximian, Inc.
9 // Copyright 2003-2008 Novell, Inc.
13 namespace Mono
.CSharp
{
15 using System
.Collections
.Generic
;
16 using System
.Reflection
;
17 using System
.Reflection
.Emit
;
20 using SLE
= System
.Linq
.Expressions
;
23 // This is an user operator expression, automatically created during
26 public class UserOperatorCall
: Expression
{
27 public delegate Expression
ExpressionTreeExpression (ResolveContext ec
, MethodGroupExpr mg
);
29 protected readonly Arguments arguments
;
30 protected readonly MethodGroupExpr mg
;
31 readonly ExpressionTreeExpression expr_tree
;
33 public UserOperatorCall (MethodGroupExpr mg
, Arguments args
, ExpressionTreeExpression expr_tree
, Location loc
)
36 this.arguments
= args
;
37 this.expr_tree
= expr_tree
;
39 type
= TypeManager
.TypeToCoreType (((MethodSpec
) mg
).ReturnType
);
40 eclass
= ExprClass
.Value
;
44 public override Expression
CreateExpressionTree (ResolveContext ec
)
46 if (expr_tree
!= null)
47 return expr_tree (ec
, mg
);
49 Arguments args
= Arguments
.CreateForExpressionTree (ec
, arguments
,
50 new NullLiteral (loc
),
51 mg
.CreateExpressionTree (ec
));
53 return CreateExpressionFactoryCall (ec
, "Call", args
);
56 protected override void CloneTo (CloneContext context
, Expression target
)
61 protected override Expression
DoResolve (ResolveContext ec
)
64 // We are born fully resolved
69 public override void Emit (EmitContext ec
)
71 mg
.EmitCall (ec
, arguments
);
74 public override SLE
.Expression
MakeExpression (BuilderContext ctx
)
76 var method
= ((MethodSpec
) mg
).MetaInfo
as MethodInfo
;
77 return SLE
.Expression
.Call (method
, Arguments
.MakeExpression (arguments
, ctx
));
80 public MethodGroupExpr Method
{
84 public override void MutateHoistedGenericType (AnonymousMethodStorey storey
)
86 arguments
.MutateHoistedGenericType (storey
);
87 mg
.MutateHoistedGenericType (storey
);
91 public class ParenthesizedExpression
: ShimExpression
93 public ParenthesizedExpression (Expression expr
)
99 protected override Expression
DoResolve (ResolveContext ec
)
101 return expr
.Resolve (ec
);
104 public override Expression
DoResolveLValue (ResolveContext ec
, Expression right_side
)
106 return expr
.DoResolveLValue (ec
, right_side
);
111 // Unary implements unary expressions.
113 public class Unary
: Expression
115 public enum Operator
: byte {
116 UnaryPlus
, UnaryNegation
, LogicalNot
, OnesComplement
,
120 static Type
[] [] predefined_operators
;
122 public readonly Operator Oper
;
123 public Expression Expr
;
124 Expression enum_conversion
;
126 public Unary (Operator op
, Expression expr
)
134 // This routine will attempt to simplify the unary expression when the
135 // argument is a constant.
137 Constant
TryReduceConstant (ResolveContext ec
, Constant e
)
139 if (e
is EmptyConstantCast
)
140 return TryReduceConstant (ec
, ((EmptyConstantCast
) e
).child
);
142 if (e
is SideEffectConstant
) {
143 Constant r
= TryReduceConstant (ec
, ((SideEffectConstant
) e
).value);
144 return r
== null ? null : new SideEffectConstant (r
, e
, r
.Location
);
147 Type expr_type
= e
.Type
;
150 case Operator
.UnaryPlus
:
151 // Unary numeric promotions
152 if (expr_type
== TypeManager
.byte_type
)
153 return new IntConstant (((ByteConstant
)e
).Value
, e
.Location
);
154 if (expr_type
== TypeManager
.sbyte_type
)
155 return new IntConstant (((SByteConstant
)e
).Value
, e
.Location
);
156 if (expr_type
== TypeManager
.short_type
)
157 return new IntConstant (((ShortConstant
)e
).Value
, e
.Location
);
158 if (expr_type
== TypeManager
.ushort_type
)
159 return new IntConstant (((UShortConstant
)e
).Value
, e
.Location
);
160 if (expr_type
== TypeManager
.char_type
)
161 return new IntConstant (((CharConstant
)e
).Value
, e
.Location
);
163 // Predefined operators
164 if (expr_type
== TypeManager
.int32_type
|| expr_type
== TypeManager
.uint32_type
||
165 expr_type
== TypeManager
.int64_type
|| expr_type
== TypeManager
.uint64_type
||
166 expr_type
== TypeManager
.float_type
|| expr_type
== TypeManager
.double_type
||
167 expr_type
== TypeManager
.decimal_type
) {
173 case Operator
.UnaryNegation
:
174 // Unary numeric promotions
175 if (expr_type
== TypeManager
.byte_type
)
176 return new IntConstant (-((ByteConstant
)e
).Value
, e
.Location
);
177 if (expr_type
== TypeManager
.sbyte_type
)
178 return new IntConstant (-((SByteConstant
)e
).Value
, e
.Location
);
179 if (expr_type
== TypeManager
.short_type
)
180 return new IntConstant (-((ShortConstant
)e
).Value
, e
.Location
);
181 if (expr_type
== TypeManager
.ushort_type
)
182 return new IntConstant (-((UShortConstant
)e
).Value
, e
.Location
);
183 if (expr_type
== TypeManager
.char_type
)
184 return new IntConstant (-((CharConstant
)e
).Value
, e
.Location
);
186 // Predefined operators
187 if (expr_type
== TypeManager
.int32_type
) {
188 int value = ((IntConstant
)e
).Value
;
189 if (value == int.MinValue
) {
190 if (ec
.ConstantCheckState
) {
191 ConstantFold
.Error_CompileTimeOverflow (ec
, loc
);
196 return new IntConstant (-value, e
.Location
);
198 if (expr_type
== TypeManager
.int64_type
) {
199 long value = ((LongConstant
)e
).Value
;
200 if (value == long.MinValue
) {
201 if (ec
.ConstantCheckState
) {
202 ConstantFold
.Error_CompileTimeOverflow (ec
, loc
);
207 return new LongConstant (-value, e
.Location
);
210 if (expr_type
== TypeManager
.uint32_type
) {
211 UIntLiteral uil
= e
as UIntLiteral
;
213 if (uil
.Value
== int.MaxValue
+ (uint) 1)
214 return new IntLiteral (int.MinValue
, e
.Location
);
215 return new LongLiteral (-uil
.Value
, e
.Location
);
217 return new LongConstant (-((UIntConstant
)e
).Value
, e
.Location
);
220 if (expr_type
== TypeManager
.uint64_type
) {
221 ULongLiteral ull
= e
as ULongLiteral
;
222 if (ull
!= null && ull
.Value
== 9223372036854775808)
223 return new LongLiteral (long.MinValue
, e
.Location
);
227 if (expr_type
== TypeManager
.float_type
) {
228 FloatLiteral fl
= e
as FloatLiteral
;
229 // For better error reporting
231 return new FloatLiteral (-fl
.Value
, e
.Location
);
233 return new FloatConstant (-((FloatConstant
)e
).Value
, e
.Location
);
235 if (expr_type
== TypeManager
.double_type
) {
236 DoubleLiteral dl
= e
as DoubleLiteral
;
237 // For better error reporting
239 return new DoubleLiteral (-dl
.Value
, e
.Location
);
241 return new DoubleConstant (-((DoubleConstant
)e
).Value
, e
.Location
);
243 if (expr_type
== TypeManager
.decimal_type
)
244 return new DecimalConstant (-((DecimalConstant
)e
).Value
, e
.Location
);
248 case Operator
.LogicalNot
:
249 if (expr_type
!= TypeManager
.bool_type
)
252 bool b
= (bool)e
.GetValue ();
253 return new BoolConstant (!b
, e
.Location
);
255 case Operator
.OnesComplement
:
256 // Unary numeric promotions
257 if (expr_type
== TypeManager
.byte_type
)
258 return new IntConstant (~
((ByteConstant
)e
).Value
, e
.Location
);
259 if (expr_type
== TypeManager
.sbyte_type
)
260 return new IntConstant (~
((SByteConstant
)e
).Value
, e
.Location
);
261 if (expr_type
== TypeManager
.short_type
)
262 return new IntConstant (~
((ShortConstant
)e
).Value
, e
.Location
);
263 if (expr_type
== TypeManager
.ushort_type
)
264 return new IntConstant (~
((UShortConstant
)e
).Value
, e
.Location
);
265 if (expr_type
== TypeManager
.char_type
)
266 return new IntConstant (~
((CharConstant
)e
).Value
, e
.Location
);
268 // Predefined operators
269 if (expr_type
== TypeManager
.int32_type
)
270 return new IntConstant (~
((IntConstant
)e
).Value
, e
.Location
);
271 if (expr_type
== TypeManager
.uint32_type
)
272 return new UIntConstant (~
((UIntConstant
)e
).Value
, e
.Location
);
273 if (expr_type
== TypeManager
.int64_type
)
274 return new LongConstant (~
((LongConstant
)e
).Value
, e
.Location
);
275 if (expr_type
== TypeManager
.uint64_type
){
276 return new ULongConstant (~
((ULongConstant
)e
).Value
, e
.Location
);
278 if (e
is EnumConstant
) {
279 e
= TryReduceConstant (ec
, ((EnumConstant
)e
).Child
);
281 e
= new EnumConstant (e
, expr_type
);
286 throw new Exception ("Can not constant fold: " + Oper
.ToString());
289 protected Expression
ResolveOperator (ResolveContext ec
, Expression expr
)
291 eclass
= ExprClass
.Value
;
293 if (predefined_operators
== null)
294 CreatePredefinedOperatorsTable ();
296 Type expr_type
= expr
.Type
;
297 Expression best_expr
;
300 // Primitive types first
302 if (TypeManager
.IsPrimitiveType (expr_type
)) {
303 best_expr
= ResolvePrimitivePredefinedType (expr
);
304 if (best_expr
== null)
307 type
= best_expr
.Type
;
313 // E operator ~(E x);
315 if (Oper
== Operator
.OnesComplement
&& TypeManager
.IsEnumType (expr_type
))
316 return ResolveEnumOperator (ec
, expr
);
318 return ResolveUserType (ec
, expr
);
321 protected virtual Expression
ResolveEnumOperator (ResolveContext ec
, Expression expr
)
323 Type underlying_type
= TypeManager
.GetEnumUnderlyingType (expr
.Type
);
324 Expression best_expr
= ResolvePrimitivePredefinedType (EmptyCast
.Create (expr
, underlying_type
));
325 if (best_expr
== null)
329 enum_conversion
= Convert
.ExplicitNumericConversion (new EmptyExpression (best_expr
.Type
), underlying_type
);
331 return EmptyCast
.Create (this, type
);
334 public override Expression
CreateExpressionTree (ResolveContext ec
)
336 return CreateExpressionTree (ec
, null);
339 Expression
CreateExpressionTree (ResolveContext ec
, MethodGroupExpr user_op
)
343 case Operator
.AddressOf
:
344 Error_PointerInsideExpressionTree (ec
);
346 case Operator
.UnaryNegation
:
347 if (ec
.HasSet (ResolveContext
.Options
.CheckedScope
) && user_op
== null && !IsFloat (type
))
348 method_name
= "NegateChecked";
350 method_name
= "Negate";
352 case Operator
.OnesComplement
:
353 case Operator
.LogicalNot
:
356 case Operator
.UnaryPlus
:
357 method_name
= "UnaryPlus";
360 throw new InternalErrorException ("Unknown unary operator " + Oper
.ToString ());
363 Arguments args
= new Arguments (2);
364 args
.Add (new Argument (Expr
.CreateExpressionTree (ec
)));
366 args
.Add (new Argument (user_op
.CreateExpressionTree (ec
)));
367 return CreateExpressionFactoryCall (ec
, method_name
, args
);
370 static void CreatePredefinedOperatorsTable ()
372 predefined_operators
= new Type
[(int) Operator
.TOP
] [];
375 // 7.6.1 Unary plus operator
377 predefined_operators
[(int) Operator
.UnaryPlus
] = new Type
[] {
378 TypeManager
.int32_type
, TypeManager
.uint32_type
,
379 TypeManager
.int64_type
, TypeManager
.uint64_type
,
380 TypeManager
.float_type
, TypeManager
.double_type
,
381 TypeManager
.decimal_type
385 // 7.6.2 Unary minus operator
387 predefined_operators
[(int) Operator
.UnaryNegation
] = new Type
[] {
388 TypeManager
.int32_type
,
389 TypeManager
.int64_type
,
390 TypeManager
.float_type
, TypeManager
.double_type
,
391 TypeManager
.decimal_type
395 // 7.6.3 Logical negation operator
397 predefined_operators
[(int) Operator
.LogicalNot
] = new Type
[] {
398 TypeManager
.bool_type
402 // 7.6.4 Bitwise complement operator
404 predefined_operators
[(int) Operator
.OnesComplement
] = new Type
[] {
405 TypeManager
.int32_type
, TypeManager
.uint32_type
,
406 TypeManager
.int64_type
, TypeManager
.uint64_type
411 // Unary numeric promotions
413 static Expression
DoNumericPromotion (Operator op
, Expression expr
)
415 Type expr_type
= expr
.Type
;
416 if ((op
== Operator
.UnaryPlus
|| op
== Operator
.UnaryNegation
|| op
== Operator
.OnesComplement
) &&
417 expr_type
== TypeManager
.byte_type
|| expr_type
== TypeManager
.sbyte_type
||
418 expr_type
== TypeManager
.short_type
|| expr_type
== TypeManager
.ushort_type
||
419 expr_type
== TypeManager
.char_type
)
420 return Convert
.ImplicitNumericConversion (expr
, TypeManager
.int32_type
);
422 if (op
== Operator
.UnaryNegation
&& expr_type
== TypeManager
.uint32_type
)
423 return Convert
.ImplicitNumericConversion (expr
, TypeManager
.int64_type
);
428 protected override Expression
DoResolve (ResolveContext ec
)
430 if (Oper
== Operator
.AddressOf
) {
431 return ResolveAddressOf (ec
);
434 Expr
= Expr
.Resolve (ec
);
438 if (TypeManager
.IsDynamicType (Expr
.Type
)) {
439 Arguments args
= new Arguments (1);
440 args
.Add (new Argument (Expr
));
441 return new DynamicUnaryConversion (GetOperatorExpressionTypeName (), args
, loc
).Resolve (ec
);
444 if (TypeManager
.IsNullableType (Expr
.Type
))
445 return new Nullable
.LiftedUnaryOperator (Oper
, Expr
).Resolve (ec
);
448 // Attempt to use a constant folding operation.
450 Constant cexpr
= Expr
as Constant
;
452 cexpr
= TryReduceConstant (ec
, cexpr
);
454 return cexpr
.Resolve (ec
);
457 Expression expr
= ResolveOperator (ec
, Expr
);
459 Error_OperatorCannotBeApplied (ec
, loc
, OperName (Oper
), Expr
.Type
);
462 // Reduce unary operator on predefined types
464 if (expr
== this && Oper
== Operator
.UnaryPlus
)
470 public override Expression
DoResolveLValue (ResolveContext ec
, Expression right
)
475 public override void Emit (EmitContext ec
)
477 EmitOperator (ec
, type
);
480 protected void EmitOperator (EmitContext ec
, Type type
)
482 ILGenerator ig
= ec
.ig
;
485 case Operator
.UnaryPlus
:
489 case Operator
.UnaryNegation
:
490 if (ec
.HasSet (EmitContext
.Options
.CheckedScope
) && !IsFloat (type
)) {
491 ig
.Emit (OpCodes
.Ldc_I4_0
);
492 if (type
== TypeManager
.int64_type
)
493 ig
.Emit (OpCodes
.Conv_U8
);
495 ig
.Emit (OpCodes
.Sub_Ovf
);
498 ig
.Emit (OpCodes
.Neg
);
503 case Operator
.LogicalNot
:
505 ig
.Emit (OpCodes
.Ldc_I4_0
);
506 ig
.Emit (OpCodes
.Ceq
);
509 case Operator
.OnesComplement
:
511 ig
.Emit (OpCodes
.Not
);
514 case Operator
.AddressOf
:
515 ((IMemoryLocation
)Expr
).AddressOf (ec
, AddressOp
.LoadStore
);
519 throw new Exception ("This should not happen: Operator = "
524 // Same trick as in Binary expression
526 if (enum_conversion
!= null)
527 enum_conversion
.Emit (ec
);
530 public override void EmitBranchable (EmitContext ec
, Label target
, bool on_true
)
532 if (Oper
== Operator
.LogicalNot
)
533 Expr
.EmitBranchable (ec
, target
, !on_true
);
535 base.EmitBranchable (ec
, target
, on_true
);
538 public override void EmitSideEffect (EmitContext ec
)
540 Expr
.EmitSideEffect (ec
);
543 public static void Error_OperatorCannotBeApplied (ResolveContext ec
, Location loc
, string oper
, Type t
)
545 ec
.Report
.Error (23, loc
, "The `{0}' operator cannot be applied to operand of type `{1}'",
546 oper
, TypeManager
.CSharpName (t
));
550 // Converts operator to System.Linq.Expressions.ExpressionType enum name
552 string GetOperatorExpressionTypeName ()
555 case Operator
.OnesComplement
:
556 return "OnesComplement";
557 case Operator
.LogicalNot
:
559 case Operator
.UnaryNegation
:
561 case Operator
.UnaryPlus
:
564 throw new NotImplementedException ("Unknown express type operator " + Oper
.ToString ());
568 static bool IsFloat (Type t
)
570 return t
== TypeManager
.float_type
|| t
== TypeManager
.double_type
;
574 // Returns a stringified representation of the Operator
576 public static string OperName (Operator oper
)
579 case Operator
.UnaryPlus
:
581 case Operator
.UnaryNegation
:
583 case Operator
.LogicalNot
:
585 case Operator
.OnesComplement
:
587 case Operator
.AddressOf
:
591 throw new NotImplementedException (oper
.ToString ());
594 public override SLE
.Expression
MakeExpression (BuilderContext ctx
)
596 var expr
= Expr
.MakeExpression (ctx
);
597 bool is_checked
= ctx
.HasSet (BuilderContext
.Options
.CheckedScope
);
600 case Operator
.UnaryNegation
:
601 return is_checked
? SLE
.Expression
.NegateChecked (expr
) : SLE
.Expression
.Negate (expr
);
602 case Operator
.LogicalNot
:
603 return SLE
.Expression
.Not (expr
);
605 case Operator
.OnesComplement
:
606 return SLE
.Expression
.OnesComplement (expr
);
609 throw new NotImplementedException (Oper
.ToString ());
613 public override void MutateHoistedGenericType (AnonymousMethodStorey storey
)
615 type
= storey
.MutateType (type
);
616 Expr
.MutateHoistedGenericType (storey
);
619 Expression
ResolveAddressOf (ResolveContext ec
)
622 UnsafeError (ec
, loc
);
624 Expr
= Expr
.DoResolveLValue (ec
, EmptyExpression
.UnaryAddress
);
625 if (Expr
== null || Expr
.eclass
!= ExprClass
.Variable
) {
626 ec
.Report
.Error (211, loc
, "Cannot take the address of the given expression");
630 if (!TypeManager
.VerifyUnmanaged (ec
.Compiler
, Expr
.Type
, loc
)) {
634 IVariableReference vr
= Expr
as IVariableReference
;
637 VariableInfo vi
= vr
.VariableInfo
;
639 if (vi
.LocalInfo
!= null)
640 vi
.LocalInfo
.Used
= true;
643 // A variable is considered definitely assigned if you take its address.
648 is_fixed
= vr
.IsFixed
;
649 vr
.SetHasAddressTaken ();
652 AnonymousMethodExpression
.Error_AddressOfCapturedVar (ec
, vr
, loc
);
655 IFixedExpression fe
= Expr
as IFixedExpression
;
656 is_fixed
= fe
!= null && fe
.IsFixed
;
659 if (!is_fixed
&& !ec
.HasSet (ResolveContext
.Options
.FixedInitializerScope
)) {
660 ec
.Report
.Error (212, loc
, "You can only take the address of unfixed expression inside of a fixed statement initializer");
663 type
= TypeManager
.GetPointerType (Expr
.Type
);
664 eclass
= ExprClass
.Value
;
668 Expression
ResolvePrimitivePredefinedType (Expression expr
)
670 expr
= DoNumericPromotion (Oper
, expr
);
671 Type expr_type
= expr
.Type
;
672 Type
[] predefined
= predefined_operators
[(int) Oper
];
673 foreach (Type t
in predefined
) {
681 // Perform user-operator overload resolution
683 protected virtual Expression
ResolveUserOperator (ResolveContext ec
, Expression expr
)
685 CSharp
.Operator
.OpType op_type
;
687 case Operator
.LogicalNot
:
688 op_type
= CSharp
.Operator
.OpType
.LogicalNot
; break;
689 case Operator
.OnesComplement
:
690 op_type
= CSharp
.Operator
.OpType
.OnesComplement
; break;
691 case Operator
.UnaryNegation
:
692 op_type
= CSharp
.Operator
.OpType
.UnaryNegation
; break;
693 case Operator
.UnaryPlus
:
694 op_type
= CSharp
.Operator
.OpType
.UnaryPlus
; break;
696 throw new InternalErrorException (Oper
.ToString ());
699 string op_name
= CSharp
.Operator
.GetMetadataName (op_type
);
700 MethodGroupExpr user_op
= MemberLookup (ec
.Compiler
, ec
.CurrentType
, expr
.Type
, op_name
, MemberTypes
.Method
, AllBindingFlags
, expr
.Location
) as MethodGroupExpr
;
704 Arguments args
= new Arguments (1);
705 args
.Add (new Argument (expr
));
706 user_op
= user_op
.OverloadResolve (ec
, ref args
, false, expr
.Location
);
711 Expr
= args
[0].Expr
;
712 return new UserOperatorCall (user_op
, args
, CreateExpressionTree
, expr
.Location
);
716 // Unary user type overload resolution
718 Expression
ResolveUserType (ResolveContext ec
, Expression expr
)
720 Expression best_expr
= ResolveUserOperator (ec
, expr
);
721 if (best_expr
!= null)
724 Type
[] predefined
= predefined_operators
[(int) Oper
];
725 foreach (Type t
in predefined
) {
726 Expression oper_expr
= Convert
.UserDefinedConversion (ec
, expr
, t
, expr
.Location
, false, false);
727 if (oper_expr
== null)
731 // decimal type is predefined but has user-operators
733 if (oper_expr
.Type
== TypeManager
.decimal_type
)
734 oper_expr
= ResolveUserType (ec
, oper_expr
);
736 oper_expr
= ResolvePrimitivePredefinedType (oper_expr
);
738 if (oper_expr
== null)
741 if (best_expr
== null) {
742 best_expr
= oper_expr
;
746 int result
= MethodGroupExpr
.BetterTypeConversion (ec
, best_expr
.Type
, t
);
748 ec
.Report
.Error (35, loc
, "Operator `{0}' is ambiguous on an operand of type `{1}'",
749 OperName (Oper
), TypeManager
.CSharpName (expr
.Type
));
754 best_expr
= oper_expr
;
757 if (best_expr
== null)
761 // HACK: Decimal user-operator is included in standard operators
763 if (best_expr
.Type
== TypeManager
.decimal_type
)
767 type
= best_expr
.Type
;
771 protected override void CloneTo (CloneContext clonectx
, Expression t
)
773 Unary target
= (Unary
) t
;
775 target
.Expr
= Expr
.Clone (clonectx
);
780 // Unary operators are turned into Indirection expressions
781 // after semantic analysis (this is so we can take the address
782 // of an indirection).
784 public class Indirection
: Expression
, IMemoryLocation
, IAssignMethod
, IFixedExpression
{
786 LocalTemporary temporary
;
789 public Indirection (Expression expr
, Location l
)
795 public override Expression
CreateExpressionTree (ResolveContext ec
)
797 Error_PointerInsideExpressionTree (ec
);
801 protected override void CloneTo (CloneContext clonectx
, Expression t
)
803 Indirection target
= (Indirection
) t
;
804 target
.expr
= expr
.Clone (clonectx
);
807 public override void Emit (EmitContext ec
)
812 LoadFromPtr (ec
.ig
, Type
);
815 public void Emit (EmitContext ec
, bool leave_copy
)
819 ec
.ig
.Emit (OpCodes
.Dup
);
820 temporary
= new LocalTemporary (expr
.Type
);
821 temporary
.Store (ec
);
825 public void EmitAssign (EmitContext ec
, Expression source
, bool leave_copy
, bool prepare_for_load
)
827 prepared
= prepare_for_load
;
831 if (prepare_for_load
)
832 ec
.ig
.Emit (OpCodes
.Dup
);
836 ec
.ig
.Emit (OpCodes
.Dup
);
837 temporary
= new LocalTemporary (expr
.Type
);
838 temporary
.Store (ec
);
841 StoreFromPtr (ec
.ig
, type
);
843 if (temporary
!= null) {
845 temporary
.Release (ec
);
849 public void AddressOf (EmitContext ec
, AddressOp Mode
)
854 public override Expression
DoResolveLValue (ResolveContext ec
, Expression right_side
)
856 return DoResolve (ec
);
859 protected override Expression
DoResolve (ResolveContext ec
)
861 expr
= expr
.Resolve (ec
);
866 UnsafeError (ec
, loc
);
868 if (!expr
.Type
.IsPointer
) {
869 ec
.Report
.Error (193, loc
, "The * or -> operator must be applied to a pointer");
873 if (expr
.Type
== TypeManager
.void_ptr_type
) {
874 ec
.Report
.Error (242, loc
, "The operation in question is undefined on void pointers");
878 type
= TypeManager
.GetElementType (expr
.Type
);
879 eclass
= ExprClass
.Variable
;
883 public bool IsFixed
{
887 public override string ToString ()
889 return "*(" + expr
+ ")";
894 /// Unary Mutator expressions (pre and post ++ and --)
898 /// UnaryMutator implements ++ and -- expressions. It derives from
899 /// ExpressionStatement becuase the pre/post increment/decrement
900 /// operators can be used in a statement context.
902 /// FIXME: Idea, we could split this up in two classes, one simpler
903 /// for the common case, and one with the extra fields for more complex
904 /// classes (indexers require temporary access; overloaded require method)
907 public class UnaryMutator
: ExpressionStatement
909 class DynamicPostMutator
: Expression
, IAssignMethod
914 public DynamicPostMutator (Expression expr
)
917 this.type
= expr
.Type
;
918 this.loc
= expr
.Location
;
921 public override Expression
CreateExpressionTree (ResolveContext ec
)
923 throw new NotImplementedException ("ET");
926 protected override Expression
DoResolve (ResolveContext rc
)
928 eclass
= expr
.eclass
;
932 public override Expression
DoResolveLValue (ResolveContext ec
, Expression right_side
)
934 expr
.DoResolveLValue (ec
, right_side
);
935 return DoResolve (ec
);
938 public override void Emit (EmitContext ec
)
943 public void Emit (EmitContext ec
, bool leave_copy
)
945 throw new NotImplementedException ();
949 // Emits target assignment using unmodified source value
951 public void EmitAssign (EmitContext ec
, Expression source
, bool leave_copy
, bool prepare_for_load
)
954 // Allocate temporary variable to keep original value before it's modified
956 temp
= new LocalTemporary (type
);
960 ((IAssignMethod
) expr
).EmitAssign (ec
, source
, false, prepare_for_load
);
971 public enum Mode
: byte {
978 PreDecrement
= IsDecrement
,
979 PostIncrement
= IsPost
,
980 PostDecrement
= IsPost
| IsDecrement
984 bool is_expr
, recurse
;
988 // Holds the real operation
989 Expression operation
;
991 public UnaryMutator (Mode m
, Expression e
)
998 public override Expression
CreateExpressionTree (ResolveContext ec
)
1000 return new SimpleAssign (this, this).CreateExpressionTree (ec
);
1003 protected override Expression
DoResolve (ResolveContext ec
)
1005 expr
= expr
.Resolve (ec
);
1010 if (TypeManager
.IsDynamicType (expr
.Type
)) {
1012 // Handle postfix unary operators using local
1013 // temporary variable
1015 if ((mode
& Mode
.IsPost
) != 0)
1016 expr
= new DynamicPostMutator (expr
);
1018 Arguments args
= new Arguments (1);
1019 args
.Add (new Argument (expr
));
1020 return new SimpleAssign (expr
, new DynamicUnaryConversion (GetOperatorExpressionTypeName (), args
, loc
)).Resolve (ec
);
1023 if (TypeManager
.IsNullableType (expr
.Type
))
1024 return new Nullable
.LiftedUnaryMutator (mode
, expr
, loc
).Resolve (ec
);
1026 eclass
= ExprClass
.Value
;
1028 return ResolveOperator (ec
);
1031 void EmitCode (EmitContext ec
, bool is_expr
)
1034 this.is_expr
= is_expr
;
1035 ((IAssignMethod
) expr
).EmitAssign (ec
, this, is_expr
&& (mode
== Mode
.PreIncrement
|| mode
== Mode
.PreDecrement
), true);
1038 public override void Emit (EmitContext ec
)
1041 // We use recurse to allow ourselfs to be the source
1042 // of an assignment. This little hack prevents us from
1043 // having to allocate another expression
1046 ((IAssignMethod
) expr
).Emit (ec
, is_expr
&& (mode
== Mode
.PostIncrement
|| mode
== Mode
.PostDecrement
));
1048 operation
.Emit (ec
);
1054 EmitCode (ec
, true);
1057 public override void EmitStatement (EmitContext ec
)
1059 EmitCode (ec
, false);
1063 // Converts operator to System.Linq.Expressions.ExpressionType enum name
1065 string GetOperatorExpressionTypeName ()
1067 return IsDecrement
? "Decrement" : "Increment";
1071 get { return (mode & Mode.IsDecrement) != 0; }
1075 // Returns whether an object of type `t' can be incremented
1076 // or decremented with add/sub (ie, basically whether we can
1077 // use pre-post incr-decr operations on it, but it is not a
1078 // System.Decimal, which we require operator overloading to catch)
1080 static bool IsPredefinedOperator (Type t
)
1082 return (TypeManager
.IsPrimitiveType (t
) && t
!= TypeManager
.bool_type
) ||
1083 TypeManager
.IsEnumType (t
) ||
1084 t
.IsPointer
&& t
!= TypeManager
.void_ptr_type
;
1088 public override SLE
.Expression
MakeExpression (BuilderContext ctx
)
1090 var target
= ((RuntimeValueExpression
) expr
).MetaObject
.Expression
;
1091 var source
= SLE
.Expression
.Convert (operation
.MakeExpression (ctx
), target
.Type
);
1092 return SLE
.Expression
.Assign (target
, source
);
1096 protected override void CloneTo (CloneContext clonectx
, Expression t
)
1098 UnaryMutator target
= (UnaryMutator
) t
;
1100 target
.expr
= expr
.Clone (clonectx
);
1103 Expression
ResolveOperator (ResolveContext ec
)
1105 if (expr
is RuntimeValueExpression
) {
1108 // Use itself at the top of the stack
1109 operation
= new EmptyExpression (type
);
1113 // The operand of the prefix/postfix increment decrement operators
1114 // should be an expression that is classified as a variable,
1115 // a property access or an indexer access
1117 if (expr
.eclass
== ExprClass
.Variable
|| expr
.eclass
== ExprClass
.IndexerAccess
|| expr
.eclass
== ExprClass
.PropertyAccess
) {
1118 expr
= expr
.ResolveLValue (ec
, expr
);
1120 ec
.Report
.Error (1059, loc
, "The operand of an increment or decrement operator must be a variable, property or indexer");
1124 // 1. Check predefined types
1126 if (IsPredefinedOperator (type
)) {
1127 // TODO: Move to IntConstant once I get rid of int32_type
1128 var one
= new IntConstant (1, loc
);
1130 // TODO: Cache this based on type when using EmptyExpression in
1132 Binary
.Operator op
= IsDecrement
? Binary
.Operator
.Subtraction
: Binary
.Operator
.Addition
;
1133 operation
= new Binary (op
, operation
, one
);
1134 operation
= operation
.Resolve (ec
);
1135 if (operation
!= null && operation
.Type
!= type
)
1136 operation
= Convert
.ExplicitNumericConversion (operation
, type
);
1142 // Step 2: Perform Operator Overload location
1148 op_name
= Operator
.GetMetadataName (Operator
.OpType
.Decrement
);
1150 op_name
= Operator
.GetMetadataName (Operator
.OpType
.Increment
);
1152 mg
= MemberLookup (ec
.Compiler
, ec
.CurrentType
, type
, op_name
, MemberTypes
.Method
, AllBindingFlags
, loc
) as MethodGroupExpr
;
1155 Arguments args
= new Arguments (1);
1156 args
.Add (new Argument (expr
));
1157 mg
= mg
.OverloadResolve (ec
, ref args
, false, loc
);
1161 args
[0].Expr
= operation
;
1162 operation
= new UserOperatorCall (mg
, args
, null, loc
);
1163 operation
= Convert
.ImplicitConversionRequired (ec
, operation
, type
, loc
);
1167 string name
= IsDecrement
?
1168 Operator
.GetName (Operator
.OpType
.Decrement
) :
1169 Operator
.GetName (Operator
.OpType
.Increment
);
1171 Unary
.Error_OperatorCannotBeApplied (ec
, loc
, name
, type
);
1177 /// Base class for the `Is' and `As' classes.
1181 /// FIXME: Split this in two, and we get to save the `Operator' Oper
1184 public abstract class Probe
: Expression
{
1185 public Expression ProbeType
;
1186 protected Expression expr
;
1187 protected TypeExpr probe_type_expr
;
1189 public Probe (Expression expr
, Expression probe_type
, Location l
)
1191 ProbeType
= probe_type
;
1196 public Expression Expr
{
1202 protected override Expression
DoResolve (ResolveContext ec
)
1204 probe_type_expr
= ProbeType
.ResolveAsTypeTerminal (ec
, false);
1205 if (probe_type_expr
== null)
1208 expr
= expr
.Resolve (ec
);
1212 if ((probe_type_expr
.Type
.Attributes
& Class
.StaticClassAttribute
) == Class
.StaticClassAttribute
) {
1213 ec
.Report
.Error (-244, loc
, "The `{0}' operator cannot be applied to an operand of a static type",
1217 if (expr
.Type
.IsPointer
|| probe_type_expr
.Type
.IsPointer
) {
1218 ec
.Report
.Error (244, loc
, "The `{0}' operator cannot be applied to an operand of pointer type",
1223 if (expr
.Type
== InternalType
.AnonymousMethod
) {
1224 ec
.Report
.Error (837, loc
, "The `{0}' operator cannot be applied to a lambda expression or anonymous method",
1232 public override void MutateHoistedGenericType (AnonymousMethodStorey storey
)
1234 expr
.MutateHoistedGenericType (storey
);
1235 probe_type_expr
.MutateHoistedGenericType (storey
);
1238 protected abstract string OperatorName { get; }
1240 protected override void CloneTo (CloneContext clonectx
, Expression t
)
1242 Probe target
= (Probe
) t
;
1244 target
.expr
= expr
.Clone (clonectx
);
1245 target
.ProbeType
= ProbeType
.Clone (clonectx
);
1251 /// Implementation of the `is' operator.
1253 public class Is
: Probe
{
1254 Nullable
.Unwrap expr_unwrap
;
1256 public Is (Expression expr
, Expression probe_type
, Location l
)
1257 : base (expr
, probe_type
, l
)
1261 public override Expression
CreateExpressionTree (ResolveContext ec
)
1263 Arguments args
= Arguments
.CreateForExpressionTree (ec
, null,
1264 expr
.CreateExpressionTree (ec
),
1265 new TypeOf (probe_type_expr
, loc
));
1267 return CreateExpressionFactoryCall (ec
, "TypeIs", args
);
1270 public override void Emit (EmitContext ec
)
1272 ILGenerator ig
= ec
.ig
;
1273 if (expr_unwrap
!= null) {
1274 expr_unwrap
.EmitCheck (ec
);
1279 ig
.Emit (OpCodes
.Isinst
, probe_type_expr
.Type
);
1280 ig
.Emit (OpCodes
.Ldnull
);
1281 ig
.Emit (OpCodes
.Cgt_Un
);
1284 public override void EmitBranchable (EmitContext ec
, Label target
, bool on_true
)
1286 ILGenerator ig
= ec
.ig
;
1287 if (expr_unwrap
!= null) {
1288 expr_unwrap
.EmitCheck (ec
);
1291 ig
.Emit (OpCodes
.Isinst
, probe_type_expr
.Type
);
1293 ig
.Emit (on_true
? OpCodes
.Brtrue
: OpCodes
.Brfalse
, target
);
1296 Expression
CreateConstantResult (ResolveContext ec
, bool result
)
1299 ec
.Report
.Warning (183, 1, loc
, "The given expression is always of the provided (`{0}') type",
1300 TypeManager
.CSharpName (probe_type_expr
.Type
));
1302 ec
.Report
.Warning (184, 1, loc
, "The given expression is never of the provided (`{0}') type",
1303 TypeManager
.CSharpName (probe_type_expr
.Type
));
1305 return ReducedExpression
.Create (new BoolConstant (result
, loc
).Resolve (ec
), this);
1308 protected override Expression
DoResolve (ResolveContext ec
)
1310 if (base.DoResolve (ec
) == null)
1314 bool d_is_nullable
= false;
1317 // If E is a method group or the null literal, or if the type of E is a reference
1318 // type or a nullable type and the value of E is null, the result is false
1320 if (expr
.IsNull
|| expr
.eclass
== ExprClass
.MethodGroup
)
1321 return CreateConstantResult (ec
, false);
1323 if (TypeManager
.IsNullableType (d
) && !TypeManager
.ContainsGenericParameters (d
)) {
1324 d
= TypeManager
.TypeToCoreType (TypeManager
.GetTypeArguments (d
) [0]);
1325 d_is_nullable
= true;
1328 type
= TypeManager
.bool_type
;
1329 eclass
= ExprClass
.Value
;
1330 Type t
= probe_type_expr
.Type
;
1331 bool t_is_nullable
= false;
1332 if (TypeManager
.IsNullableType (t
) && !TypeManager
.ContainsGenericParameters (t
)) {
1333 t
= TypeManager
.TypeToCoreType (TypeManager
.GetTypeArguments (t
) [0]);
1334 t_is_nullable
= true;
1337 if (TypeManager
.IsStruct (t
)) {
1340 // D and T are the same value types but D can be null
1342 if (d_is_nullable
&& !t_is_nullable
) {
1343 expr_unwrap
= Nullable
.Unwrap
.Create (expr
, false);
1348 // The result is true if D and T are the same value types
1350 return CreateConstantResult (ec
, true);
1353 if (TypeManager
.IsGenericParameter (d
))
1354 return ResolveGenericParameter (ec
, t
, d
);
1357 // An unboxing conversion exists
1359 if (Convert
.ExplicitReferenceConversionExists (d
, t
))
1362 if (TypeManager
.IsGenericParameter (t
))
1363 return ResolveGenericParameter (ec
, d
, t
);
1365 if (TypeManager
.IsStruct (d
)) {
1367 if (Convert
.ImplicitBoxingConversionExists (expr
, t
, out temp
))
1368 return CreateConstantResult (ec
, true);
1370 if (TypeManager
.IsGenericParameter (d
))
1371 return ResolveGenericParameter (ec
, t
, d
);
1373 if (TypeManager
.ContainsGenericParameters (d
))
1376 if (Convert
.ImplicitReferenceConversionExists (expr
, t
) ||
1377 Convert
.ExplicitReferenceConversionExists (d
, t
)) {
1383 return CreateConstantResult (ec
, false);
1386 Expression
ResolveGenericParameter (ResolveContext ec
, Type d
, Type t
)
1388 GenericConstraints constraints
= TypeManager
.GetTypeParameterConstraints (t
);
1389 if (constraints
!= null) {
1390 if (constraints
.IsReferenceType
&& TypeManager
.IsStruct (d
))
1391 return CreateConstantResult (ec
, false);
1394 if (TypeManager
.IsGenericParameter (expr
.Type
)) {
1395 if (constraints
!= null && constraints
.IsValueType
&& expr
.Type
== t
)
1396 return CreateConstantResult (ec
, true);
1398 expr
= new BoxedCast (expr
, d
);
1404 protected override string OperatorName
{
1405 get { return "is"; }
1410 /// Implementation of the `as' operator.
1412 public class As
: Probe
{
1414 Expression resolved_type
;
1416 public As (Expression expr
, Expression probe_type
, Location l
)
1417 : base (expr
, probe_type
, l
)
1421 public override Expression
CreateExpressionTree (ResolveContext ec
)
1423 Arguments args
= Arguments
.CreateForExpressionTree (ec
, null,
1424 expr
.CreateExpressionTree (ec
),
1425 new TypeOf (probe_type_expr
, loc
));
1427 return CreateExpressionFactoryCall (ec
, "TypeAs", args
);
1430 public override void Emit (EmitContext ec
)
1432 ILGenerator ig
= ec
.ig
;
1437 ig
.Emit (OpCodes
.Isinst
, type
);
1439 if (TypeManager
.IsGenericParameter (type
) || TypeManager
.IsNullableType (type
))
1440 ig
.Emit (OpCodes
.Unbox_Any
, type
);
1443 protected override Expression
DoResolve (ResolveContext ec
)
1445 if (resolved_type
== null) {
1446 resolved_type
= base.DoResolve (ec
);
1448 if (resolved_type
== null)
1452 type
= probe_type_expr
.Type
;
1453 eclass
= ExprClass
.Value
;
1454 Type etype
= expr
.Type
;
1456 if (!TypeManager
.IsReferenceType (type
) && !TypeManager
.IsNullableType (type
)) {
1457 if (TypeManager
.IsGenericParameter (type
)) {
1458 ec
.Report
.Error (413, loc
,
1459 "The `as' operator cannot be used with a non-reference type parameter `{0}'. Consider adding `class' or a reference type constraint",
1460 probe_type_expr
.GetSignatureForError ());
1462 ec
.Report
.Error (77, loc
,
1463 "The `as' operator cannot be used with a non-nullable value type `{0}'",
1464 TypeManager
.CSharpName (type
));
1469 if (expr
.IsNull
&& TypeManager
.IsNullableType (type
)) {
1470 return Nullable
.LiftedNull
.CreateFromExpression (ec
, this);
1473 Expression e
= Convert
.ImplicitConversion (ec
, expr
, type
, loc
);
1480 if (Convert
.ExplicitReferenceConversionExists (etype
, type
)){
1481 if (TypeManager
.IsGenericParameter (etype
))
1482 expr
= new BoxedCast (expr
, etype
);
1488 if (TypeManager
.ContainsGenericParameters (etype
) ||
1489 TypeManager
.ContainsGenericParameters (type
)) {
1490 expr
= new BoxedCast (expr
, etype
);
1495 ec
.Report
.Error (39, loc
, "Cannot convert type `{0}' to `{1}' via a built-in conversion",
1496 TypeManager
.CSharpName (etype
), TypeManager
.CSharpName (type
));
1501 protected override string OperatorName
{
1502 get { return "as"; }
1505 public override void MutateHoistedGenericType (AnonymousMethodStorey storey
)
1507 type
= storey
.MutateType (type
);
1508 base.MutateHoistedGenericType (storey
);
1511 public override bool GetAttributableValue (ResolveContext ec
, Type value_type
, out object value)
1513 return expr
.GetAttributableValue (ec
, value_type
, out value);
1518 /// This represents a typecast in the source language.
1520 /// FIXME: Cast expressions have an unusual set of parsing
1521 /// rules, we need to figure those out.
1523 public class Cast
: ShimExpression
{
1524 Expression target_type
;
1526 public Cast (Expression cast_type
, Expression expr
)
1527 : this (cast_type
, expr
, cast_type
.Location
)
1531 public Cast (Expression cast_type
, Expression expr
, Location loc
)
1534 this.target_type
= cast_type
;
1538 public Expression TargetType
{
1539 get { return target_type; }
1542 protected override Expression
DoResolve (ResolveContext ec
)
1544 expr
= expr
.Resolve (ec
);
1548 TypeExpr target
= target_type
.ResolveAsTypeTerminal (ec
, false);
1554 if (type
.IsAbstract
&& type
.IsSealed
) {
1555 ec
.Report
.Error (716, loc
, "Cannot convert to static type `{0}'", TypeManager
.CSharpName (type
));
1559 eclass
= ExprClass
.Value
;
1561 Constant c
= expr
as Constant
;
1563 c
= c
.TryReduce (ec
, type
, loc
);
1568 if (type
.IsPointer
&& !ec
.IsUnsafe
) {
1569 UnsafeError (ec
, loc
);
1570 } else if (TypeManager
.IsDynamicType (expr
.Type
)) {
1571 Arguments arg
= new Arguments (1);
1572 arg
.Add (new Argument (expr
));
1573 return new DynamicConversion (type
, CSharpBinderFlags
.ConvertExplicit
, arg
, loc
).Resolve (ec
);
1576 expr
= Convert
.ExplicitConversion (ec
, expr
, type
, loc
);
1580 protected override void CloneTo (CloneContext clonectx
, Expression t
)
1582 Cast target
= (Cast
) t
;
1584 target
.target_type
= target_type
.Clone (clonectx
);
1585 target
.expr
= expr
.Clone (clonectx
);
1589 public class ImplicitCast
: ShimExpression
1593 public ImplicitCast (Expression expr
, Type target
, bool arrayAccess
)
1596 this.loc
= expr
.Location
;
1598 this.arrayAccess
= arrayAccess
;
1601 protected override Expression
DoResolve (ResolveContext ec
)
1603 expr
= expr
.Resolve (ec
);
1608 expr
= ConvertExpressionToArrayIndex (ec
, expr
);
1610 expr
= Convert
.ImplicitConversionRequired (ec
, expr
, type
, loc
);
1617 // C# 2.0 Default value expression
1619 public class DefaultValueExpression
: Expression
1623 public DefaultValueExpression (Expression expr
, Location loc
)
1629 public override Expression
CreateExpressionTree (ResolveContext ec
)
1631 Arguments args
= new Arguments (2);
1632 args
.Add (new Argument (this));
1633 args
.Add (new Argument (new TypeOf (new TypeExpression (type
, loc
), loc
)));
1634 return CreateExpressionFactoryCall (ec
, "Constant", args
);
1637 protected override Expression
DoResolve (ResolveContext ec
)
1639 TypeExpr texpr
= expr
.ResolveAsTypeTerminal (ec
, false);
1645 if ((type
.Attributes
& Class
.StaticClassAttribute
) == Class
.StaticClassAttribute
) {
1646 ec
.Report
.Error (-244, loc
, "The `default value' operator cannot be applied to an operand of a static type");
1650 return new NullLiteral (Location
).ConvertImplicitly (ec
, type
);
1652 if (TypeManager
.IsReferenceType (type
))
1653 return new NullConstant (type
, loc
);
1655 Constant c
= New
.Constantify (type
);
1657 return c
.Resolve (ec
);
1659 eclass
= ExprClass
.Variable
;
1663 public override void Emit (EmitContext ec
)
1665 LocalTemporary temp_storage
= new LocalTemporary(type
);
1667 temp_storage
.AddressOf(ec
, AddressOp
.LoadStore
);
1668 ec
.ig
.Emit(OpCodes
.Initobj
, type
);
1669 temp_storage
.Emit(ec
);
1672 public override void MutateHoistedGenericType (AnonymousMethodStorey storey
)
1674 type
= storey
.MutateType (type
);
1677 protected override void CloneTo (CloneContext clonectx
, Expression t
)
1679 DefaultValueExpression target
= (DefaultValueExpression
) t
;
1681 target
.expr
= expr
.Clone (clonectx
);
1686 /// Binary operators
1688 public class Binary
: Expression
, IDynamicBinder
1691 protected class PredefinedOperator
{
1692 protected readonly Type left
;
1693 protected readonly Type right
;
1694 public readonly Operator OperatorsMask
;
1695 public Type ReturnType
;
1697 public PredefinedOperator (Type ltype
, Type rtype
, Operator op_mask
)
1698 : this (ltype
, rtype
, op_mask
, ltype
)
1702 public PredefinedOperator (Type type
, Operator op_mask
, Type return_type
)
1703 : this (type
, type
, op_mask
, return_type
)
1707 public PredefinedOperator (Type type
, Operator op_mask
)
1708 : this (type
, type
, op_mask
, type
)
1712 public PredefinedOperator (Type ltype
, Type rtype
, Operator op_mask
, Type return_type
)
1714 if ((op_mask
& Operator
.ValuesOnlyMask
) != 0)
1715 throw new InternalErrorException ("Only masked values can be used");
1719 this.OperatorsMask
= op_mask
;
1720 this.ReturnType
= return_type
;
1723 public virtual Expression
ConvertResult (ResolveContext ec
, Binary b
)
1725 b
.type
= ReturnType
;
1727 b
.left
= Convert
.ImplicitConversion (ec
, b
.left
, left
, b
.left
.Location
);
1728 b
.right
= Convert
.ImplicitConversion (ec
, b
.right
, right
, b
.right
.Location
);
1731 // A user operators does not support multiple user conversions, but decimal type
1732 // is considered to be predefined type therefore we apply predefined operators rules
1733 // and then look for decimal user-operator implementation
1735 if (left
== TypeManager
.decimal_type
)
1736 return b
.ResolveUserOperator (ec
, b
.left
.Type
, b
.right
.Type
);
1738 var c
= b
.right
as Constant
;
1740 if (c
.IsDefaultValue
&& (b
.oper
== Operator
.Addition
|| b
.oper
== Operator
.BitwiseOr
|| b
.oper
== Operator
.Subtraction
))
1741 return ReducedExpression
.Create (b
.left
, b
).Resolve (ec
);
1742 if ((b
.oper
== Operator
.Multiply
|| b
.oper
== Operator
.Division
) && c
.IsOneInteger
)
1743 return ReducedExpression
.Create (b
.left
, b
).Resolve (ec
);
1747 c
= b
.left
as Constant
;
1749 if (c
.IsDefaultValue
&& (b
.oper
== Operator
.Addition
|| b
.oper
== Operator
.BitwiseOr
))
1750 return ReducedExpression
.Create (b
.right
, b
).Resolve (ec
);
1751 if (b
.oper
== Operator
.Multiply
&& c
.IsOneInteger
)
1752 return ReducedExpression
.Create (b
.right
, b
).Resolve (ec
);
1759 public bool IsPrimitiveApplicable (Type ltype
, Type rtype
)
1762 // We are dealing with primitive types only
1764 return left
== ltype
&& ltype
== rtype
;
1767 public virtual bool IsApplicable (ResolveContext ec
, Expression lexpr
, Expression rexpr
)
1769 if (TypeManager
.IsEqual (left
, lexpr
.Type
) &&
1770 TypeManager
.IsEqual (right
, rexpr
.Type
))
1773 return Convert
.ImplicitConversionExists (ec
, lexpr
, left
) &&
1774 Convert
.ImplicitConversionExists (ec
, rexpr
, right
);
1777 public PredefinedOperator
ResolveBetterOperator (ResolveContext ec
, PredefinedOperator best_operator
)
1780 if (left
!= null && best_operator
.left
!= null) {
1781 result
= MethodGroupExpr
.BetterTypeConversion (ec
, best_operator
.left
, left
);
1785 // When second arguments are same as the first one, the result is same
1787 if (right
!= null && (left
!= right
|| best_operator
.left
!= best_operator
.right
)) {
1788 result
|= MethodGroupExpr
.BetterTypeConversion (ec
, best_operator
.right
, right
);
1791 if (result
== 0 || result
> 2)
1794 return result
== 1 ? best_operator
: this;
1798 class PredefinedStringOperator
: PredefinedOperator
{
1799 public PredefinedStringOperator (Type type
, Operator op_mask
)
1800 : base (type
, op_mask
, type
)
1802 ReturnType
= TypeManager
.string_type
;
1805 public PredefinedStringOperator (Type ltype
, Type rtype
, Operator op_mask
)
1806 : base (ltype
, rtype
, op_mask
)
1808 ReturnType
= TypeManager
.string_type
;
1811 public override Expression
ConvertResult (ResolveContext ec
, Binary b
)
1814 // Use original expression for nullable arguments
1816 Nullable
.Unwrap unwrap
= b
.left
as Nullable
.Unwrap
;
1818 b
.left
= unwrap
.Original
;
1820 unwrap
= b
.right
as Nullable
.Unwrap
;
1822 b
.right
= unwrap
.Original
;
1824 b
.left
= Convert
.ImplicitConversion (ec
, b
.left
, left
, b
.left
.Location
);
1825 b
.right
= Convert
.ImplicitConversion (ec
, b
.right
, right
, b
.right
.Location
);
1828 // Start a new concat expression using converted expression
1830 return StringConcat
.Create (ec
, b
.left
, b
.right
, b
.loc
);
1834 class PredefinedShiftOperator
: PredefinedOperator
{
1835 public PredefinedShiftOperator (Type ltype
, Operator op_mask
) :
1836 base (ltype
, TypeManager
.int32_type
, op_mask
)
1840 public override Expression
ConvertResult (ResolveContext ec
, Binary b
)
1842 b
.left
= Convert
.ImplicitConversion (ec
, b
.left
, left
, b
.left
.Location
);
1844 Expression expr_tree_expr
= Convert
.ImplicitConversion (ec
, b
.right
, TypeManager
.int32_type
, b
.right
.Location
);
1846 int right_mask
= left
== TypeManager
.int32_type
|| left
== TypeManager
.uint32_type
? 0x1f : 0x3f;
1849 // b = b.left >> b.right & (0x1f|0x3f)
1851 b
.right
= new Binary (Operator
.BitwiseAnd
,
1852 b
.right
, new IntConstant (right_mask
, b
.right
.Location
)).Resolve (ec
);
1855 // Expression tree representation does not use & mask
1857 b
.right
= ReducedExpression
.Create (b
.right
, expr_tree_expr
).Resolve (ec
);
1858 b
.type
= ReturnType
;
1861 // Optimize shift by 0
1863 var c
= b
.right
as Constant
;
1864 if (c
!= null && c
.IsDefaultValue
)
1865 return ReducedExpression
.Create (b
.left
, b
).Resolve (ec
);
1871 class PredefinedPointerOperator
: PredefinedOperator
{
1872 public PredefinedPointerOperator (Type ltype
, Type rtype
, Operator op_mask
)
1873 : base (ltype
, rtype
, op_mask
)
1877 public PredefinedPointerOperator (Type ltype
, Type rtype
, Operator op_mask
, Type retType
)
1878 : base (ltype
, rtype
, op_mask
, retType
)
1882 public PredefinedPointerOperator (Type type
, Operator op_mask
, Type return_type
)
1883 : base (type
, op_mask
, return_type
)
1887 public override bool IsApplicable (ResolveContext ec
, Expression lexpr
, Expression rexpr
)
1890 if (!lexpr
.Type
.IsPointer
)
1893 if (!Convert
.ImplicitConversionExists (ec
, lexpr
, left
))
1897 if (right
== null) {
1898 if (!rexpr
.Type
.IsPointer
)
1901 if (!Convert
.ImplicitConversionExists (ec
, rexpr
, right
))
1908 public override Expression
ConvertResult (ResolveContext ec
, Binary b
)
1911 b
.left
= EmptyCast
.Create (b
.left
, left
);
1912 } else if (right
!= null) {
1913 b
.right
= EmptyCast
.Create (b
.right
, right
);
1916 Type r_type
= ReturnType
;
1917 Expression left_arg
, right_arg
;
1918 if (r_type
== null) {
1921 right_arg
= b
.right
;
1922 r_type
= b
.left
.Type
;
1926 r_type
= b
.right
.Type
;
1930 right_arg
= b
.right
;
1933 return new PointerArithmetic (b
.oper
, left_arg
, right_arg
, r_type
, b
.loc
).Resolve (ec
);
1938 public enum Operator
{
1939 Multiply
= 0 | ArithmeticMask
,
1940 Division
= 1 | ArithmeticMask
,
1941 Modulus
= 2 | ArithmeticMask
,
1942 Addition
= 3 | ArithmeticMask
| AdditionMask
,
1943 Subtraction
= 4 | ArithmeticMask
| SubtractionMask
,
1945 LeftShift
= 5 | ShiftMask
,
1946 RightShift
= 6 | ShiftMask
,
1948 LessThan
= 7 | ComparisonMask
| RelationalMask
,
1949 GreaterThan
= 8 | ComparisonMask
| RelationalMask
,
1950 LessThanOrEqual
= 9 | ComparisonMask
| RelationalMask
,
1951 GreaterThanOrEqual
= 10 | ComparisonMask
| RelationalMask
,
1952 Equality
= 11 | ComparisonMask
| EqualityMask
,
1953 Inequality
= 12 | ComparisonMask
| EqualityMask
,
1955 BitwiseAnd
= 13 | BitwiseMask
,
1956 ExclusiveOr
= 14 | BitwiseMask
,
1957 BitwiseOr
= 15 | BitwiseMask
,
1959 LogicalAnd
= 16 | LogicalMask
,
1960 LogicalOr
= 17 | LogicalMask
,
1965 ValuesOnlyMask
= ArithmeticMask
- 1,
1966 ArithmeticMask
= 1 << 5,
1968 ComparisonMask
= 1 << 7,
1969 EqualityMask
= 1 << 8,
1970 BitwiseMask
= 1 << 9,
1971 LogicalMask
= 1 << 10,
1972 AdditionMask
= 1 << 11,
1973 SubtractionMask
= 1 << 12,
1974 RelationalMask
= 1 << 13
1977 readonly Operator oper
;
1978 protected Expression left
, right
;
1979 readonly bool is_compound
;
1980 Expression enum_conversion
;
1982 static PredefinedOperator
[] standard_operators
;
1983 static PredefinedOperator
[] pointer_operators
;
1985 public Binary (Operator oper
, Expression left
, Expression right
, bool isCompound
)
1986 : this (oper
, left
, right
)
1988 this.is_compound
= isCompound
;
1991 public Binary (Operator oper
, Expression left
, Expression right
)
1996 this.loc
= left
.Location
;
1999 public Operator Oper
{
2006 /// Returns a stringified representation of the Operator
2008 string OperName (Operator oper
)
2012 case Operator
.Multiply
:
2015 case Operator
.Division
:
2018 case Operator
.Modulus
:
2021 case Operator
.Addition
:
2024 case Operator
.Subtraction
:
2027 case Operator
.LeftShift
:
2030 case Operator
.RightShift
:
2033 case Operator
.LessThan
:
2036 case Operator
.GreaterThan
:
2039 case Operator
.LessThanOrEqual
:
2042 case Operator
.GreaterThanOrEqual
:
2045 case Operator
.Equality
:
2048 case Operator
.Inequality
:
2051 case Operator
.BitwiseAnd
:
2054 case Operator
.BitwiseOr
:
2057 case Operator
.ExclusiveOr
:
2060 case Operator
.LogicalOr
:
2063 case Operator
.LogicalAnd
:
2067 s
= oper
.ToString ();
2077 public static void Error_OperatorCannotBeApplied (ResolveContext ec
, Expression left
, Expression right
, Operator oper
, Location loc
)
2079 new Binary (oper
, left
, right
).Error_OperatorCannotBeApplied (ec
, left
, right
);
2082 public static void Error_OperatorCannotBeApplied (ResolveContext ec
, Expression left
, Expression right
, string oper
, Location loc
)
2085 l
= TypeManager
.CSharpName (left
.Type
);
2086 r
= TypeManager
.CSharpName (right
.Type
);
2088 ec
.Report
.Error (19, loc
, "Operator `{0}' cannot be applied to operands of type `{1}' and `{2}'",
2092 protected void Error_OperatorCannotBeApplied (ResolveContext ec
, Expression left
, Expression right
)
2094 Error_OperatorCannotBeApplied (ec
, left
, right
, OperName (oper
), loc
);
2098 // Converts operator to System.Linq.Expressions.ExpressionType enum name
2100 string GetOperatorExpressionTypeName ()
2103 case Operator
.Addition
:
2104 return is_compound
? "AddAssign" : "Add";
2105 case Operator
.BitwiseAnd
:
2106 return is_compound
? "AndAssign" : "And";
2107 case Operator
.BitwiseOr
:
2108 return is_compound
? "OrAssign" : "Or";
2109 case Operator
.Division
:
2110 return is_compound
? "DivideAssign" : "Divide";
2111 case Operator
.ExclusiveOr
:
2112 return is_compound
? "ExclusiveOrAssign" : "ExclusiveOr";
2113 case Operator
.Equality
:
2115 case Operator
.GreaterThan
:
2116 return "GreaterThan";
2117 case Operator
.GreaterThanOrEqual
:
2118 return "GreaterThanOrEqual";
2119 case Operator
.Inequality
:
2121 case Operator
.LeftShift
:
2122 return is_compound
? "LeftShiftAssign" : "LeftShift";
2123 case Operator
.LessThan
:
2125 case Operator
.LessThanOrEqual
:
2126 return "LessThanOrEqual";
2127 case Operator
.LogicalAnd
:
2129 case Operator
.LogicalOr
:
2131 case Operator
.Modulus
:
2132 return is_compound
? "ModuloAssign" : "Modulo";
2133 case Operator
.Multiply
:
2134 return is_compound
? "MultiplyAssign" : "Multiply";
2135 case Operator
.RightShift
:
2136 return is_compound
? "RightShiftAssign" : "RightShift";
2137 case Operator
.Subtraction
:
2138 return is_compound
? "SubtractAssign" : "Subtract";
2140 throw new NotImplementedException ("Unknown expression type operator " + oper
.ToString ());
2144 static string GetOperatorMetadataName (Operator op
)
2146 CSharp
.Operator
.OpType op_type
;
2148 case Operator
.Addition
:
2149 op_type
= CSharp
.Operator
.OpType
.Addition
; break;
2150 case Operator
.BitwiseAnd
:
2151 op_type
= CSharp
.Operator
.OpType
.BitwiseAnd
; break;
2152 case Operator
.BitwiseOr
:
2153 op_type
= CSharp
.Operator
.OpType
.BitwiseOr
; break;
2154 case Operator
.Division
:
2155 op_type
= CSharp
.Operator
.OpType
.Division
; break;
2156 case Operator
.Equality
:
2157 op_type
= CSharp
.Operator
.OpType
.Equality
; break;
2158 case Operator
.ExclusiveOr
:
2159 op_type
= CSharp
.Operator
.OpType
.ExclusiveOr
; break;
2160 case Operator
.GreaterThan
:
2161 op_type
= CSharp
.Operator
.OpType
.GreaterThan
; break;
2162 case Operator
.GreaterThanOrEqual
:
2163 op_type
= CSharp
.Operator
.OpType
.GreaterThanOrEqual
; break;
2164 case Operator
.Inequality
:
2165 op_type
= CSharp
.Operator
.OpType
.Inequality
; break;
2166 case Operator
.LeftShift
:
2167 op_type
= CSharp
.Operator
.OpType
.LeftShift
; break;
2168 case Operator
.LessThan
:
2169 op_type
= CSharp
.Operator
.OpType
.LessThan
; break;
2170 case Operator
.LessThanOrEqual
:
2171 op_type
= CSharp
.Operator
.OpType
.LessThanOrEqual
; break;
2172 case Operator
.Modulus
:
2173 op_type
= CSharp
.Operator
.OpType
.Modulus
; break;
2174 case Operator
.Multiply
:
2175 op_type
= CSharp
.Operator
.OpType
.Multiply
; break;
2176 case Operator
.RightShift
:
2177 op_type
= CSharp
.Operator
.OpType
.RightShift
; break;
2178 case Operator
.Subtraction
:
2179 op_type
= CSharp
.Operator
.OpType
.Subtraction
; break;
2181 throw new InternalErrorException (op
.ToString ());
2184 return CSharp
.Operator
.GetMetadataName (op_type
);
2187 public static void EmitOperatorOpcode (EmitContext ec
, Operator oper
, Type l
)
2190 ILGenerator ig
= ec
.ig
;
2193 case Operator
.Multiply
:
2194 if (ec
.HasSet (EmitContext
.Options
.CheckedScope
)) {
2195 if (l
== TypeManager
.int32_type
|| l
== TypeManager
.int64_type
)
2196 opcode
= OpCodes
.Mul_Ovf
;
2197 else if (!IsFloat (l
))
2198 opcode
= OpCodes
.Mul_Ovf_Un
;
2200 opcode
= OpCodes
.Mul
;
2202 opcode
= OpCodes
.Mul
;
2206 case Operator
.Division
:
2208 opcode
= OpCodes
.Div_Un
;
2210 opcode
= OpCodes
.Div
;
2213 case Operator
.Modulus
:
2215 opcode
= OpCodes
.Rem_Un
;
2217 opcode
= OpCodes
.Rem
;
2220 case Operator
.Addition
:
2221 if (ec
.HasSet (EmitContext
.Options
.CheckedScope
)) {
2222 if (l
== TypeManager
.int32_type
|| l
== TypeManager
.int64_type
)
2223 opcode
= OpCodes
.Add_Ovf
;
2224 else if (!IsFloat (l
))
2225 opcode
= OpCodes
.Add_Ovf_Un
;
2227 opcode
= OpCodes
.Add
;
2229 opcode
= OpCodes
.Add
;
2232 case Operator
.Subtraction
:
2233 if (ec
.HasSet (EmitContext
.Options
.CheckedScope
)) {
2234 if (l
== TypeManager
.int32_type
|| l
== TypeManager
.int64_type
)
2235 opcode
= OpCodes
.Sub_Ovf
;
2236 else if (!IsFloat (l
))
2237 opcode
= OpCodes
.Sub_Ovf_Un
;
2239 opcode
= OpCodes
.Sub
;
2241 opcode
= OpCodes
.Sub
;
2244 case Operator
.RightShift
:
2246 opcode
= OpCodes
.Shr_Un
;
2248 opcode
= OpCodes
.Shr
;
2251 case Operator
.LeftShift
:
2252 opcode
= OpCodes
.Shl
;
2255 case Operator
.Equality
:
2256 opcode
= OpCodes
.Ceq
;
2259 case Operator
.Inequality
:
2260 ig
.Emit (OpCodes
.Ceq
);
2261 ig
.Emit (OpCodes
.Ldc_I4_0
);
2263 opcode
= OpCodes
.Ceq
;
2266 case Operator
.LessThan
:
2268 opcode
= OpCodes
.Clt_Un
;
2270 opcode
= OpCodes
.Clt
;
2273 case Operator
.GreaterThan
:
2275 opcode
= OpCodes
.Cgt_Un
;
2277 opcode
= OpCodes
.Cgt
;
2280 case Operator
.LessThanOrEqual
:
2281 if (IsUnsigned (l
) || IsFloat (l
))
2282 ig
.Emit (OpCodes
.Cgt_Un
);
2284 ig
.Emit (OpCodes
.Cgt
);
2285 ig
.Emit (OpCodes
.Ldc_I4_0
);
2287 opcode
= OpCodes
.Ceq
;
2290 case Operator
.GreaterThanOrEqual
:
2291 if (IsUnsigned (l
) || IsFloat (l
))
2292 ig
.Emit (OpCodes
.Clt_Un
);
2294 ig
.Emit (OpCodes
.Clt
);
2296 ig
.Emit (OpCodes
.Ldc_I4_0
);
2298 opcode
= OpCodes
.Ceq
;
2301 case Operator
.BitwiseOr
:
2302 opcode
= OpCodes
.Or
;
2305 case Operator
.BitwiseAnd
:
2306 opcode
= OpCodes
.And
;
2309 case Operator
.ExclusiveOr
:
2310 opcode
= OpCodes
.Xor
;
2314 throw new InternalErrorException (oper
.ToString ());
2320 static bool IsUnsigned (Type t
)
2325 return (t
== TypeManager
.uint32_type
|| t
== TypeManager
.uint64_type
||
2326 t
== TypeManager
.ushort_type
|| t
== TypeManager
.byte_type
);
2329 static bool IsFloat (Type t
)
2331 return t
== TypeManager
.float_type
|| t
== TypeManager
.double_type
;
2334 Expression
ResolveOperator (ResolveContext ec
)
2337 Type r
= right
.Type
;
2339 bool primitives_only
= false;
2341 if (standard_operators
== null)
2342 CreateStandardOperatorsTable ();
2345 // Handles predefined primitive types
2347 if (TypeManager
.IsPrimitiveType (l
) && TypeManager
.IsPrimitiveType (r
)) {
2348 if ((oper
& Operator
.ShiftMask
) == 0) {
2349 if (l
!= TypeManager
.bool_type
&& !DoBinaryOperatorPromotion (ec
))
2352 primitives_only
= true;
2356 if (l
.IsPointer
|| r
.IsPointer
)
2357 return ResolveOperatorPointer (ec
, l
, r
);
2360 bool lenum
= TypeManager
.IsEnumType (l
);
2361 bool renum
= TypeManager
.IsEnumType (r
);
2362 if (lenum
|| renum
) {
2363 expr
= ResolveOperatorEnum (ec
, lenum
, renum
, l
, r
);
2365 // TODO: Can this be ambiguous
2371 if ((oper
== Operator
.Addition
|| oper
== Operator
.Subtraction
|| (oper
& Operator
.EqualityMask
) != 0) &&
2372 (TypeManager
.IsDelegateType (l
) || TypeManager
.IsDelegateType (r
))) {
2374 expr
= ResolveOperatorDelegate (ec
, l
, r
);
2376 // TODO: Can this be ambiguous
2382 expr
= ResolveUserOperator (ec
, l
, r
);
2386 // Predefined reference types equality
2387 if ((oper
& Operator
.EqualityMask
) != 0) {
2388 expr
= ResolveOperatorEqualityRerefence (ec
, l
, r
);
2394 return ResolveOperatorPredefined (ec
, standard_operators
, primitives_only
, null);
2397 // at least one of 'left' or 'right' is an enumeration constant (EnumConstant or SideEffectConstant or ...)
2398 // if 'left' is not an enumeration constant, create one from the type of 'right'
2399 Constant
EnumLiftUp (ResolveContext ec
, Constant left
, Constant right
, Location loc
)
2402 case Operator
.BitwiseOr
:
2403 case Operator
.BitwiseAnd
:
2404 case Operator
.ExclusiveOr
:
2405 case Operator
.Equality
:
2406 case Operator
.Inequality
:
2407 case Operator
.LessThan
:
2408 case Operator
.LessThanOrEqual
:
2409 case Operator
.GreaterThan
:
2410 case Operator
.GreaterThanOrEqual
:
2411 if (TypeManager
.IsEnumType (left
.Type
))
2414 if (left
.IsZeroInteger
)
2415 return left
.TryReduce (ec
, right
.Type
, loc
);
2419 case Operator
.Addition
:
2420 case Operator
.Subtraction
:
2423 case Operator
.Multiply
:
2424 case Operator
.Division
:
2425 case Operator
.Modulus
:
2426 case Operator
.LeftShift
:
2427 case Operator
.RightShift
:
2428 if (TypeManager
.IsEnumType (right
.Type
) || TypeManager
.IsEnumType (left
.Type
))
2432 Error_OperatorCannotBeApplied (ec
, this.left
, this.right
);
2437 // The `|' operator used on types which were extended is dangerous
2439 void CheckBitwiseOrOnSignExtended (ResolveContext ec
)
2441 OpcodeCast lcast
= left
as OpcodeCast
;
2442 if (lcast
!= null) {
2443 if (IsUnsigned (lcast
.UnderlyingType
))
2447 OpcodeCast rcast
= right
as OpcodeCast
;
2448 if (rcast
!= null) {
2449 if (IsUnsigned (rcast
.UnderlyingType
))
2453 if (lcast
== null && rcast
== null)
2456 // FIXME: consider constants
2458 ec
.Report
.Warning (675, 3, loc
,
2459 "The operator `|' used on the sign-extended type `{0}'. Consider casting to a smaller unsigned type first",
2460 TypeManager
.CSharpName (lcast
!= null ? lcast
.UnderlyingType
: rcast
.UnderlyingType
));
2463 static void CreatePointerOperatorsTable ()
2465 var temp
= new List
<PredefinedPointerOperator
> ();
2468 // Pointer arithmetic:
2470 // T* operator + (T* x, int y); T* operator - (T* x, int y);
2471 // T* operator + (T* x, uint y); T* operator - (T* x, uint y);
2472 // T* operator + (T* x, long y); T* operator - (T* x, long y);
2473 // T* operator + (T* x, ulong y); T* operator - (T* x, ulong y);
2475 temp
.Add (new PredefinedPointerOperator (null, TypeManager
.int32_type
, Operator
.AdditionMask
| Operator
.SubtractionMask
));
2476 temp
.Add (new PredefinedPointerOperator (null, TypeManager
.uint32_type
, Operator
.AdditionMask
| Operator
.SubtractionMask
));
2477 temp
.Add (new PredefinedPointerOperator (null, TypeManager
.int64_type
, Operator
.AdditionMask
| Operator
.SubtractionMask
));
2478 temp
.Add (new PredefinedPointerOperator (null, TypeManager
.uint64_type
, Operator
.AdditionMask
| Operator
.SubtractionMask
));
2481 // T* operator + (int y, T* x);
2482 // T* operator + (uint y, T *x);
2483 // T* operator + (long y, T *x);
2484 // T* operator + (ulong y, T *x);
2486 temp
.Add (new PredefinedPointerOperator (TypeManager
.int32_type
, null, Operator
.AdditionMask
, null));
2487 temp
.Add (new PredefinedPointerOperator (TypeManager
.uint32_type
, null, Operator
.AdditionMask
, null));
2488 temp
.Add (new PredefinedPointerOperator (TypeManager
.int64_type
, null, Operator
.AdditionMask
, null));
2489 temp
.Add (new PredefinedPointerOperator (TypeManager
.uint64_type
, null, Operator
.AdditionMask
, null));
2492 // long operator - (T* x, T *y)
2494 temp
.Add (new PredefinedPointerOperator (null, Operator
.SubtractionMask
, TypeManager
.int64_type
));
2496 pointer_operators
= temp
.ToArray ();
2499 static void CreateStandardOperatorsTable ()
2501 var temp
= new List
<PredefinedOperator
> ();
2502 Type bool_type
= TypeManager
.bool_type
;
2504 temp
.Add (new PredefinedOperator (TypeManager
.int32_type
, Operator
.ArithmeticMask
| Operator
.BitwiseMask
));
2505 temp
.Add (new PredefinedOperator (TypeManager
.uint32_type
, Operator
.ArithmeticMask
| Operator
.BitwiseMask
));
2506 temp
.Add (new PredefinedOperator (TypeManager
.int64_type
, Operator
.ArithmeticMask
| Operator
.BitwiseMask
));
2507 temp
.Add (new PredefinedOperator (TypeManager
.uint64_type
, Operator
.ArithmeticMask
| Operator
.BitwiseMask
));
2508 temp
.Add (new PredefinedOperator (TypeManager
.float_type
, Operator
.ArithmeticMask
));
2509 temp
.Add (new PredefinedOperator (TypeManager
.double_type
, Operator
.ArithmeticMask
));
2510 temp
.Add (new PredefinedOperator (TypeManager
.decimal_type
, Operator
.ArithmeticMask
));
2512 temp
.Add (new PredefinedOperator (TypeManager
.int32_type
, Operator
.ComparisonMask
, bool_type
));
2513 temp
.Add (new PredefinedOperator (TypeManager
.uint32_type
, Operator
.ComparisonMask
, bool_type
));
2514 temp
.Add (new PredefinedOperator (TypeManager
.int64_type
, Operator
.ComparisonMask
, bool_type
));
2515 temp
.Add (new PredefinedOperator (TypeManager
.uint64_type
, Operator
.ComparisonMask
, bool_type
));
2516 temp
.Add (new PredefinedOperator (TypeManager
.float_type
, Operator
.ComparisonMask
, bool_type
));
2517 temp
.Add (new PredefinedOperator (TypeManager
.double_type
, Operator
.ComparisonMask
, bool_type
));
2518 temp
.Add (new PredefinedOperator (TypeManager
.decimal_type
, Operator
.ComparisonMask
, bool_type
));
2520 temp
.Add (new PredefinedOperator (TypeManager
.string_type
, Operator
.EqualityMask
, bool_type
));
2522 temp
.Add (new PredefinedStringOperator (TypeManager
.string_type
, Operator
.AdditionMask
));
2523 temp
.Add (new PredefinedStringOperator (TypeManager
.string_type
, TypeManager
.object_type
, Operator
.AdditionMask
));
2524 temp
.Add (new PredefinedStringOperator (TypeManager
.object_type
, TypeManager
.string_type
, Operator
.AdditionMask
));
2526 temp
.Add (new PredefinedOperator (bool_type
,
2527 Operator
.BitwiseMask
| Operator
.LogicalMask
| Operator
.EqualityMask
, bool_type
));
2529 temp
.Add (new PredefinedShiftOperator (TypeManager
.int32_type
, Operator
.ShiftMask
));
2530 temp
.Add (new PredefinedShiftOperator (TypeManager
.uint32_type
, Operator
.ShiftMask
));
2531 temp
.Add (new PredefinedShiftOperator (TypeManager
.int64_type
, Operator
.ShiftMask
));
2532 temp
.Add (new PredefinedShiftOperator (TypeManager
.uint64_type
, Operator
.ShiftMask
));
2534 standard_operators
= temp
.ToArray ();
2538 // Rules used during binary numeric promotion
2540 static bool DoNumericPromotion (ResolveContext rc
, ref Expression prim_expr
, ref Expression second_expr
, Type type
)
2545 Constant c
= prim_expr
as Constant
;
2547 temp
= c
.ConvertImplicitly (rc
, type
);
2554 if (type
== TypeManager
.uint32_type
) {
2555 etype
= prim_expr
.Type
;
2556 if (etype
== TypeManager
.int32_type
|| etype
== TypeManager
.short_type
|| etype
== TypeManager
.sbyte_type
) {
2557 type
= TypeManager
.int64_type
;
2559 if (type
!= second_expr
.Type
) {
2560 c
= second_expr
as Constant
;
2562 temp
= c
.ConvertImplicitly (rc
, type
);
2564 temp
= Convert
.ImplicitNumericConversion (second_expr
, type
);
2570 } else if (type
== TypeManager
.uint64_type
) {
2572 // A compile-time error occurs if the other operand is of type sbyte, short, int, or long
2574 if (type
== TypeManager
.int32_type
|| type
== TypeManager
.int64_type
||
2575 type
== TypeManager
.short_type
|| type
== TypeManager
.sbyte_type
)
2579 temp
= Convert
.ImplicitNumericConversion (prim_expr
, type
);
2588 // 7.2.6.2 Binary numeric promotions
2590 public bool DoBinaryOperatorPromotion (ResolveContext ec
)
2592 Type ltype
= left
.Type
;
2593 Type rtype
= right
.Type
;
2596 foreach (Type t
in ConstantFold
.binary_promotions
) {
2598 return t
== rtype
|| DoNumericPromotion (ec
, ref right
, ref left
, t
);
2601 return t
== ltype
|| DoNumericPromotion (ec
, ref left
, ref right
, t
);
2604 Type int32
= TypeManager
.int32_type
;
2605 if (ltype
!= int32
) {
2606 Constant c
= left
as Constant
;
2608 temp
= c
.ConvertImplicitly (ec
, int32
);
2610 temp
= Convert
.ImplicitNumericConversion (left
, int32
);
2617 if (rtype
!= int32
) {
2618 Constant c
= right
as Constant
;
2620 temp
= c
.ConvertImplicitly (ec
, int32
);
2622 temp
= Convert
.ImplicitNumericConversion (right
, int32
);
2632 protected override Expression
DoResolve (ResolveContext ec
)
2637 if ((oper
== Operator
.Subtraction
) && (left
is ParenthesizedExpression
)) {
2638 left
= ((ParenthesizedExpression
) left
).Expr
;
2639 left
= left
.Resolve (ec
, ResolveFlags
.VariableOrValue
| ResolveFlags
.Type
);
2643 if (left
.eclass
== ExprClass
.Type
) {
2644 ec
.Report
.Error (75, loc
, "To cast a negative value, you must enclose the value in parentheses");
2648 left
= left
.Resolve (ec
);
2653 Constant lc
= left
as Constant
;
2655 if (lc
!= null && lc
.Type
== TypeManager
.bool_type
&&
2656 ((oper
== Operator
.LogicalAnd
&& lc
.IsDefaultValue
) ||
2657 (oper
== Operator
.LogicalOr
&& !lc
.IsDefaultValue
))) {
2659 // FIXME: resolve right expression as unreachable
2660 // right.Resolve (ec);
2662 ec
.Report
.Warning (429, 4, loc
, "Unreachable expression code detected");
2666 right
= right
.Resolve (ec
);
2670 eclass
= ExprClass
.Value
;
2671 Constant rc
= right
as Constant
;
2673 // The conversion rules are ignored in enum context but why
2674 if (!ec
.HasSet (ResolveContext
.Options
.EnumScope
) && lc
!= null && rc
!= null && (TypeManager
.IsEnumType (left
.Type
) || TypeManager
.IsEnumType (right
.Type
))) {
2675 lc
= EnumLiftUp (ec
, lc
, rc
, loc
);
2677 rc
= EnumLiftUp (ec
, rc
, lc
, loc
);
2680 if (rc
!= null && lc
!= null) {
2681 int prev_e
= ec
.Report
.Errors
;
2682 Expression e
= ConstantFold
.BinaryFold (ec
, oper
, lc
, rc
, loc
);
2686 if (e
!= null || ec
.Report
.Errors
!= prev_e
)
2690 // Comparison warnings
2691 if ((oper
& Operator
.ComparisonMask
) != 0) {
2692 if (left
.Equals (right
)) {
2693 ec
.Report
.Warning (1718, 3, loc
, "A comparison made to same variable. Did you mean to compare something else?");
2695 CheckUselessComparison (ec
, lc
, right
.Type
);
2696 CheckUselessComparison (ec
, rc
, left
.Type
);
2699 if (TypeManager
.IsDynamicType (left
.Type
) || TypeManager
.IsDynamicType (right
.Type
)) {
2700 Arguments args
= new Arguments (2);
2701 args
.Add (new Argument (left
));
2702 args
.Add (new Argument (right
));
2703 return new DynamicExpressionStatement (this, args
, loc
).Resolve (ec
);
2706 if (RootContext
.Version
>= LanguageVersion
.ISO_2
&&
2707 ((TypeManager
.IsNullableType (left
.Type
) && (right
is NullLiteral
|| TypeManager
.IsNullableType (right
.Type
) || TypeManager
.IsValueType (right
.Type
))) ||
2708 (TypeManager
.IsValueType (left
.Type
) && right
is NullLiteral
) ||
2709 (TypeManager
.IsNullableType (right
.Type
) && (left
is NullLiteral
|| TypeManager
.IsNullableType (left
.Type
) || TypeManager
.IsValueType (left
.Type
))) ||
2710 (TypeManager
.IsValueType (right
.Type
) && left
is NullLiteral
)))
2711 return new Nullable
.LiftedBinaryOperator (oper
, left
, right
, loc
).Resolve (ec
);
2713 return DoResolveCore (ec
, left
, right
);
2716 protected Expression
DoResolveCore (ResolveContext ec
, Expression left_orig
, Expression right_orig
)
2718 Expression expr
= ResolveOperator (ec
);
2720 Error_OperatorCannotBeApplied (ec
, left_orig
, right_orig
);
2722 if (left
== null || right
== null)
2723 throw new InternalErrorException ("Invalid conversion");
2725 if (oper
== Operator
.BitwiseOr
)
2726 CheckBitwiseOrOnSignExtended (ec
);
2731 public override SLE
.Expression
MakeExpression (BuilderContext ctx
)
2733 var le
= left
.MakeExpression (ctx
);
2734 var re
= right
.MakeExpression (ctx
);
2735 bool is_checked
= ctx
.HasSet (BuilderContext
.Options
.CheckedScope
);
2738 case Operator
.Addition
:
2739 return is_checked
? SLE
.Expression
.AddChecked (le
, re
) : SLE
.Expression
.Add (le
, re
);
2740 case Operator
.BitwiseAnd
:
2741 return SLE
.Expression
.And (le
, re
);
2742 case Operator
.BitwiseOr
:
2743 return SLE
.Expression
.Or (le
, re
);
2744 case Operator
.Division
:
2745 return SLE
.Expression
.Divide (le
, re
);
2746 case Operator
.Equality
:
2747 return SLE
.Expression
.Equal (le
, re
);
2748 case Operator
.ExclusiveOr
:
2749 return SLE
.Expression
.ExclusiveOr (le
, re
);
2750 case Operator
.GreaterThan
:
2751 return SLE
.Expression
.GreaterThan (le
, re
);
2752 case Operator
.GreaterThanOrEqual
:
2753 return SLE
.Expression
.GreaterThanOrEqual (le
, re
);
2754 case Operator
.Inequality
:
2755 return SLE
.Expression
.NotEqual (le
, re
);
2756 case Operator
.LeftShift
:
2757 return SLE
.Expression
.LeftShift (le
, re
);
2758 case Operator
.LessThan
:
2759 return SLE
.Expression
.LessThan (le
, re
);
2760 case Operator
.LessThanOrEqual
:
2761 return SLE
.Expression
.LessThanOrEqual (le
, re
);
2762 case Operator
.LogicalAnd
:
2763 return SLE
.Expression
.AndAlso (le
, re
);
2764 case Operator
.LogicalOr
:
2765 return SLE
.Expression
.OrElse (le
, re
);
2766 case Operator
.Modulus
:
2767 return SLE
.Expression
.Modulo (le
, re
);
2768 case Operator
.Multiply
:
2769 return is_checked
? SLE
.Expression
.MultiplyChecked (le
, re
) : SLE
.Expression
.Multiply (le
, re
);
2770 case Operator
.RightShift
:
2771 return SLE
.Expression
.RightShift (le
, re
);
2772 case Operator
.Subtraction
:
2773 return is_checked
? SLE
.Expression
.SubtractChecked (le
, re
) : SLE
.Expression
.Subtract (le
, re
);
2775 throw new NotImplementedException (oper
.ToString ());
2779 public override void MutateHoistedGenericType (AnonymousMethodStorey storey
)
2781 left
.MutateHoistedGenericType (storey
);
2782 right
.MutateHoistedGenericType (storey
);
2786 // D operator + (D x, D y)
2787 // D operator - (D x, D y)
2788 // bool operator == (D x, D y)
2789 // bool operator != (D x, D y)
2791 Expression
ResolveOperatorDelegate (ResolveContext ec
, Type l
, Type r
)
2793 bool is_equality
= (oper
& Operator
.EqualityMask
) != 0;
2794 if (!TypeManager
.IsEqual (l
, r
) && !TypeManager
.IsVariantOf (r
, l
)) {
2796 if (right
.eclass
== ExprClass
.MethodGroup
|| (r
== InternalType
.AnonymousMethod
&& !is_equality
)) {
2797 tmp
= Convert
.ImplicitConversionRequired (ec
, right
, l
, loc
);
2802 } else if (left
.eclass
== ExprClass
.MethodGroup
|| (l
== InternalType
.AnonymousMethod
&& !is_equality
)) {
2803 tmp
= Convert
.ImplicitConversionRequired (ec
, left
, r
, loc
);
2814 // Resolve delegate equality as a user operator
2817 return ResolveUserOperator (ec
, l
, r
);
2820 Arguments args
= new Arguments (2);
2821 args
.Add (new Argument (left
));
2822 args
.Add (new Argument (right
));
2824 if (oper
== Operator
.Addition
) {
2825 if (TypeManager
.delegate_combine_delegate_delegate
== null) {
2826 TypeManager
.delegate_combine_delegate_delegate
= TypeManager
.GetPredefinedMethod (
2827 TypeManager
.delegate_type
, "Combine", loc
, TypeManager
.delegate_type
, TypeManager
.delegate_type
);
2830 method
= TypeManager
.delegate_combine_delegate_delegate
;
2832 if (TypeManager
.delegate_remove_delegate_delegate
== null) {
2833 TypeManager
.delegate_remove_delegate_delegate
= TypeManager
.GetPredefinedMethod (
2834 TypeManager
.delegate_type
, "Remove", loc
, TypeManager
.delegate_type
, TypeManager
.delegate_type
);
2837 method
= TypeManager
.delegate_remove_delegate_delegate
;
2840 MethodGroupExpr mg
= new MethodGroupExpr (new [] { method }
, TypeManager
.delegate_type
, loc
);
2841 mg
= mg
.OverloadResolve (ec
, ref args
, false, loc
);
2843 return new ClassCast (new UserOperatorCall (mg
, args
, CreateExpressionTree
, loc
), l
);
2847 // Enumeration operators
2849 Expression
ResolveOperatorEnum (ResolveContext ec
, bool lenum
, bool renum
, Type ltype
, Type rtype
)
2852 // bool operator == (E x, E y);
2853 // bool operator != (E x, E y);
2854 // bool operator < (E x, E y);
2855 // bool operator > (E x, E y);
2856 // bool operator <= (E x, E y);
2857 // bool operator >= (E x, E y);
2859 // E operator & (E x, E y);
2860 // E operator | (E x, E y);
2861 // E operator ^ (E x, E y);
2863 // U operator - (E e, E f)
2864 // E operator - (E e, U x)
2866 // E operator + (U x, E e)
2867 // E operator + (E e, U x)
2869 if (!((oper
& (Operator
.ComparisonMask
| Operator
.BitwiseMask
)) != 0 ||
2870 (oper
== Operator
.Subtraction
&& lenum
) ||
2871 (oper
== Operator
.Addition
&& (lenum
!= renum
|| type
!= null)))) // type != null for lifted null
2874 Expression ltemp
= left
;
2875 Expression rtemp
= right
;
2876 Type underlying_type
;
2879 if ((oper
& (Operator
.ComparisonMask
| Operator
.BitwiseMask
)) != 0) {
2881 expr
= Convert
.ImplicitConversion (ec
, left
, rtype
, loc
);
2887 expr
= Convert
.ImplicitConversion (ec
, right
, ltype
, loc
);
2895 if (TypeManager
.IsEqual (ltype
, rtype
)) {
2896 underlying_type
= TypeManager
.GetEnumUnderlyingType (ltype
);
2898 if (left
is Constant
)
2899 left
= ((Constant
) left
).ConvertExplicitly (false, underlying_type
).Resolve (ec
);
2901 left
= EmptyCast
.Create (left
, underlying_type
);
2903 if (right
is Constant
)
2904 right
= ((Constant
) right
).ConvertExplicitly (false, underlying_type
).Resolve (ec
);
2906 right
= EmptyCast
.Create (right
, underlying_type
);
2908 underlying_type
= TypeManager
.GetEnumUnderlyingType (ltype
);
2910 if (oper
!= Operator
.Subtraction
&& oper
!= Operator
.Addition
) {
2911 Constant c
= right
as Constant
;
2912 if (c
== null || !c
.IsDefaultValue
)
2915 if (!Convert
.ImplicitStandardConversionExists (right
, underlying_type
))
2918 right
= Convert
.ImplicitConversionStandard (ec
, right
, underlying_type
, right
.Location
);
2921 if (left
is Constant
)
2922 left
= ((Constant
) left
).ConvertExplicitly (false, underlying_type
).Resolve (ec
);
2924 left
= EmptyCast
.Create (left
, underlying_type
);
2927 underlying_type
= TypeManager
.GetEnumUnderlyingType (rtype
);
2929 if (oper
!= Operator
.Addition
) {
2930 Constant c
= left
as Constant
;
2931 if (c
== null || !c
.IsDefaultValue
)
2934 if (!Convert
.ImplicitStandardConversionExists (left
, underlying_type
))
2937 left
= Convert
.ImplicitConversionStandard (ec
, left
, underlying_type
, left
.Location
);
2940 if (right
is Constant
)
2941 right
= ((Constant
) right
).ConvertExplicitly (false, underlying_type
).Resolve (ec
);
2943 right
= EmptyCast
.Create (right
, underlying_type
);
2950 // C# specification uses explicit cast syntax which means binary promotion
2951 // should happen, however it seems that csc does not do that
2953 if (!DoBinaryOperatorPromotion (ec
)) {
2959 Type res_type
= null;
2960 if ((oper
& Operator
.BitwiseMask
) != 0 || oper
== Operator
.Subtraction
|| oper
== Operator
.Addition
) {
2961 Type promoted_type
= lenum
? left
.Type
: right
.Type
;
2962 enum_conversion
= Convert
.ExplicitNumericConversion (
2963 new EmptyExpression (promoted_type
), underlying_type
);
2965 if (oper
== Operator
.Subtraction
&& renum
&& lenum
)
2966 res_type
= underlying_type
;
2967 else if (oper
== Operator
.Addition
&& renum
)
2973 expr
= ResolveOperatorPredefined (ec
, standard_operators
, true, res_type
);
2974 if (!is_compound
|| expr
== null)
2982 // If the return type of the selected operator is implicitly convertible to the type of x
2984 if (Convert
.ImplicitConversionExists (ec
, expr
, ltype
))
2988 // Otherwise, if the selected operator is a predefined operator, if the return type of the
2989 // selected operator is explicitly convertible to the type of x, and if y is implicitly
2990 // convertible to the type of x or the operator is a shift operator, then the operation
2991 // is evaluated as x = (T)(x op y), where T is the type of x
2993 expr
= Convert
.ExplicitConversion (ec
, expr
, ltype
, loc
);
2997 if (Convert
.ImplicitConversionExists (ec
, ltemp
, ltype
))
3004 // 7.9.6 Reference type equality operators
3006 Binary
ResolveOperatorEqualityRerefence (ResolveContext ec
, Type l
, Type r
)
3009 // operator != (object a, object b)
3010 // operator == (object a, object b)
3013 // TODO: this method is almost equivalent to Convert.ImplicitReferenceConversion
3015 if (left
.eclass
== ExprClass
.MethodGroup
|| right
.eclass
== ExprClass
.MethodGroup
)
3018 type
= TypeManager
.bool_type
;
3019 GenericConstraints constraints
;
3021 bool lgen
= TypeManager
.IsGenericParameter (l
);
3023 if (TypeManager
.IsEqual (l
, r
)) {
3026 // Only allow to compare same reference type parameter
3028 if (TypeManager
.IsReferenceType (l
)) {
3029 left
= new BoxedCast (left
, TypeManager
.object_type
);
3030 right
= new BoxedCast (right
, TypeManager
.object_type
);
3037 if (l
== InternalType
.AnonymousMethod
)
3040 if (TypeManager
.IsValueType (l
))
3046 bool rgen
= TypeManager
.IsGenericParameter (r
);
3049 // a, Both operands are reference-type values or the value null
3050 // b, One operand is a value of type T where T is a type-parameter and
3051 // the other operand is the value null. Furthermore T does not have the
3052 // value type constrain
3054 if (left
is NullLiteral
|| right
is NullLiteral
) {
3056 constraints
= TypeManager
.GetTypeParameterConstraints (l
);
3057 if (constraints
!= null && constraints
.HasValueTypeConstraint
)
3060 left
= new BoxedCast (left
, TypeManager
.object_type
);
3065 constraints
= TypeManager
.GetTypeParameterConstraints (r
);
3066 if (constraints
!= null && constraints
.HasValueTypeConstraint
)
3069 right
= new BoxedCast (right
, TypeManager
.object_type
);
3075 // An interface is converted to the object before the
3076 // standard conversion is applied. It's not clear from the
3077 // standard but it looks like it works like that.
3080 if (!TypeManager
.IsReferenceType (l
))
3083 l
= TypeManager
.object_type
;
3084 left
= new BoxedCast (left
, l
);
3085 } else if (l
.IsInterface
) {
3086 l
= TypeManager
.object_type
;
3087 } else if (TypeManager
.IsStruct (l
)) {
3092 if (!TypeManager
.IsReferenceType (r
))
3095 r
= TypeManager
.object_type
;
3096 right
= new BoxedCast (right
, r
);
3097 } else if (r
.IsInterface
) {
3098 r
= TypeManager
.object_type
;
3099 } else if (TypeManager
.IsStruct (r
)) {
3104 const string ref_comparison
= "Possible unintended reference comparison. " +
3105 "Consider casting the {0} side of the expression to `string' to compare the values";
3108 // A standard implicit conversion exists from the type of either
3109 // operand to the type of the other operand
3111 if (Convert
.ImplicitReferenceConversionExists (left
, r
)) {
3112 if (l
== TypeManager
.string_type
)
3113 ec
.Report
.Warning (253, 2, loc
, ref_comparison
, "right");
3118 if (Convert
.ImplicitReferenceConversionExists (right
, l
)) {
3119 if (r
== TypeManager
.string_type
)
3120 ec
.Report
.Warning (252, 2, loc
, ref_comparison
, "left");
3129 Expression
ResolveOperatorPointer (ResolveContext ec
, Type l
, Type r
)
3132 // bool operator == (void* x, void* y);
3133 // bool operator != (void* x, void* y);
3134 // bool operator < (void* x, void* y);
3135 // bool operator > (void* x, void* y);
3136 // bool operator <= (void* x, void* y);
3137 // bool operator >= (void* x, void* y);
3139 if ((oper
& Operator
.ComparisonMask
) != 0) {
3142 temp
= Convert
.ImplicitConversion (ec
, left
, r
, left
.Location
);
3149 temp
= Convert
.ImplicitConversion (ec
, right
, l
, right
.Location
);
3155 type
= TypeManager
.bool_type
;
3159 if (pointer_operators
== null)
3160 CreatePointerOperatorsTable ();
3162 return ResolveOperatorPredefined (ec
, pointer_operators
, false, null);
3166 // Build-in operators method overloading
3168 protected virtual Expression
ResolveOperatorPredefined (ResolveContext ec
, PredefinedOperator
[] operators
, bool primitives_only
, Type enum_type
)
3170 PredefinedOperator best_operator
= null;
3172 Type r
= right
.Type
;
3173 Operator oper_mask
= oper
& ~Operator
.ValuesOnlyMask
;
3175 foreach (PredefinedOperator po
in operators
) {
3176 if ((po
.OperatorsMask
& oper_mask
) == 0)
3179 if (primitives_only
) {
3180 if (!po
.IsPrimitiveApplicable (l
, r
))
3183 if (!po
.IsApplicable (ec
, left
, right
))
3187 if (best_operator
== null) {
3189 if (primitives_only
)
3195 best_operator
= po
.ResolveBetterOperator (ec
, best_operator
);
3197 if (best_operator
== null) {
3198 ec
.Report
.Error (34, loc
, "Operator `{0}' is ambiguous on operands of type `{1}' and `{2}'",
3199 OperName (oper
), TypeManager
.CSharpName (l
), TypeManager
.CSharpName (r
));
3206 if (best_operator
== null)
3209 Expression expr
= best_operator
.ConvertResult (ec
, this);
3212 // Optimize &/&& constant expressions with 0 value
3214 if (oper
== Operator
.BitwiseAnd
|| oper
== Operator
.LogicalAnd
) {
3215 Constant rc
= right
as Constant
;
3216 Constant lc
= left
as Constant
;
3217 if ((lc
!= null && lc
.IsDefaultValue
) || (rc
!= null && rc
.IsDefaultValue
)) {
3219 // The result is a constant with side-effect
3221 Constant side_effect
= rc
== null ?
3222 new SideEffectConstant (lc
, right
, loc
) :
3223 new SideEffectConstant (rc
, left
, loc
);
3225 return ReducedExpression
.Create (side_effect
.Resolve (ec
), expr
);
3229 if (enum_type
== null)
3233 // HACK: required by enum_conversion
3235 expr
.Type
= enum_type
;
3236 return EmptyCast
.Create (expr
, enum_type
);
3240 // Performs user-operator overloading
3242 protected virtual Expression
ResolveUserOperator (ResolveContext ec
, Type l
, Type r
)
3245 if (oper
== Operator
.LogicalAnd
)
3246 user_oper
= Operator
.BitwiseAnd
;
3247 else if (oper
== Operator
.LogicalOr
)
3248 user_oper
= Operator
.BitwiseOr
;
3252 string op
= GetOperatorMetadataName (user_oper
);
3254 MethodGroupExpr left_operators
= MemberLookup (ec
.Compiler
, ec
.CurrentType
, l
, op
, MemberTypes
.Method
, AllBindingFlags
, loc
) as MethodGroupExpr
;
3255 MethodGroupExpr right_operators
= null;
3257 if (!TypeManager
.IsEqual (r
, l
)) {
3258 right_operators
= MemberLookup (ec
.Compiler
, ec
.CurrentType
, r
, op
, MemberTypes
.Method
, AllBindingFlags
, loc
) as MethodGroupExpr
;
3259 if (right_operators
== null && left_operators
== null)
3261 } else if (left_operators
== null) {
3265 Arguments args
= new Arguments (2);
3266 Argument larg
= new Argument (left
);
3268 Argument rarg
= new Argument (right
);
3271 MethodGroupExpr union
;
3274 // User-defined operator implementations always take precedence
3275 // over predefined operator implementations
3277 if (left_operators
!= null && right_operators
!= null) {
3278 if (IsPredefinedUserOperator (l
, user_oper
)) {
3279 union
= right_operators
.OverloadResolve (ec
, ref args
, true, loc
);
3281 union
= left_operators
;
3282 } else if (IsPredefinedUserOperator (r
, user_oper
)) {
3283 union
= left_operators
.OverloadResolve (ec
, ref args
, true, loc
);
3285 union
= right_operators
;
3287 union
= MethodGroupExpr
.MakeUnionSet (left_operators
, right_operators
, loc
);
3289 } else if (left_operators
!= null) {
3290 union
= left_operators
;
3292 union
= right_operators
;
3295 union
= union
.OverloadResolve (ec
, ref args
, true, loc
);
3299 Expression oper_expr
;
3301 // TODO: CreateExpressionTree is allocated every time
3302 if (user_oper
!= oper
) {
3303 oper_expr
= new ConditionalLogicalOperator (union
, args
, CreateExpressionTree
,
3304 oper
== Operator
.LogicalAnd
, loc
).Resolve (ec
);
3306 oper_expr
= new UserOperatorCall (union
, args
, CreateExpressionTree
, loc
);
3309 // This is used to check if a test 'x == null' can be optimized to a reference equals,
3310 // and not invoke user operator
3312 if ((oper
& Operator
.EqualityMask
) != 0) {
3313 if ((left
is NullLiteral
&& IsBuildInEqualityOperator (r
)) ||
3314 (right
is NullLiteral
&& IsBuildInEqualityOperator (l
))) {
3315 type
= TypeManager
.bool_type
;
3316 if (left
is NullLiteral
|| right
is NullLiteral
)
3317 oper_expr
= ReducedExpression
.Create (this, oper_expr
);
3318 } else if (l
!= r
) {
3319 var mi
= union
.BestCandidate
;
3322 // Two System.Delegate(s) are never equal
3324 if (mi
.DeclaringType
== TypeManager
.multicast_delegate_type
)
3335 public override TypeExpr
ResolveAsTypeTerminal (IMemberContext ec
, bool silent
)
3340 private void CheckUselessComparison (ResolveContext ec
, Constant c
, Type type
)
3342 if (c
== null || !IsTypeIntegral (type
)
3343 || c
is StringConstant
3344 || c
is BoolConstant
3345 || c
is FloatConstant
3346 || c
is DoubleConstant
3347 || c
is DecimalConstant
3353 if (c
is ULongConstant
) {
3354 ulong uvalue
= ((ULongConstant
) c
).Value
;
3355 if (uvalue
> long.MaxValue
) {
3356 if (type
== TypeManager
.byte_type
||
3357 type
== TypeManager
.sbyte_type
||
3358 type
== TypeManager
.short_type
||
3359 type
== TypeManager
.ushort_type
||
3360 type
== TypeManager
.int32_type
||
3361 type
== TypeManager
.uint32_type
||
3362 type
== TypeManager
.int64_type
||
3363 type
== TypeManager
.char_type
)
3364 WarnUselessComparison (ec
, type
);
3367 value = (long) uvalue
;
3369 else if (c
is ByteConstant
)
3370 value = ((ByteConstant
) c
).Value
;
3371 else if (c
is SByteConstant
)
3372 value = ((SByteConstant
) c
).Value
;
3373 else if (c
is ShortConstant
)
3374 value = ((ShortConstant
) c
).Value
;
3375 else if (c
is UShortConstant
)
3376 value = ((UShortConstant
) c
).Value
;
3377 else if (c
is IntConstant
)
3378 value = ((IntConstant
) c
).Value
;
3379 else if (c
is UIntConstant
)
3380 value = ((UIntConstant
) c
).Value
;
3381 else if (c
is LongConstant
)
3382 value = ((LongConstant
) c
).Value
;
3383 else if (c
is CharConstant
)
3384 value = ((CharConstant
)c
).Value
;
3389 if (IsValueOutOfRange (value, type
))
3390 WarnUselessComparison (ec
, type
);
3393 static bool IsValueOutOfRange (long value, Type type
)
3395 if (IsTypeUnsigned (type
) && value < 0)
3397 return type
== TypeManager
.sbyte_type
&& (value >= 0x80 || value < -0x80) ||
3398 type
== TypeManager
.byte_type
&& value >= 0x100 ||
3399 type
== TypeManager
.short_type
&& (value >= 0x8000 || value < -0x8000) ||
3400 type
== TypeManager
.ushort_type
&& value >= 0x10000 ||
3401 type
== TypeManager
.int32_type
&& (value >= 0x80000000 || value < -0x80000000) ||
3402 type
== TypeManager
.uint32_type
&& value >= 0x100000000;
3405 static bool IsBuildInEqualityOperator (Type t
)
3407 return t
== TypeManager
.object_type
|| t
== TypeManager
.string_type
||
3408 t
== TypeManager
.delegate_type
|| TypeManager
.IsDelegateType (t
);
3411 static bool IsPredefinedUserOperator (Type t
, Operator op
)
3414 // Some predefined types have user operators
3416 return (op
& Operator
.EqualityMask
) != 0 && (t
== TypeManager
.string_type
|| t
== TypeManager
.decimal_type
);
3419 private static bool IsTypeIntegral (Type type
)
3421 return type
== TypeManager
.uint64_type
||
3422 type
== TypeManager
.int64_type
||
3423 type
== TypeManager
.uint32_type
||
3424 type
== TypeManager
.int32_type
||
3425 type
== TypeManager
.ushort_type
||
3426 type
== TypeManager
.short_type
||
3427 type
== TypeManager
.sbyte_type
||
3428 type
== TypeManager
.byte_type
||
3429 type
== TypeManager
.char_type
;
3432 private static bool IsTypeUnsigned (Type type
)
3434 return type
== TypeManager
.uint64_type
||
3435 type
== TypeManager
.uint32_type
||
3436 type
== TypeManager
.ushort_type
||
3437 type
== TypeManager
.byte_type
||
3438 type
== TypeManager
.char_type
;
3441 private void WarnUselessComparison (ResolveContext ec
, Type type
)
3443 ec
.Report
.Warning (652, 2, loc
, "A comparison between a constant and a variable is useless. The constant is out of the range of the variable type `{0}'",
3444 TypeManager
.CSharpName (type
));
3448 /// EmitBranchable is called from Statement.EmitBoolExpression in the
3449 /// context of a conditional bool expression. This function will return
3450 /// false if it is was possible to use EmitBranchable, or true if it was.
3452 /// The expression's code is generated, and we will generate a branch to `target'
3453 /// if the resulting expression value is equal to isTrue
3455 public override void EmitBranchable (EmitContext ec
, Label target
, bool on_true
)
3457 ILGenerator ig
= ec
.ig
;
3460 // This is more complicated than it looks, but its just to avoid
3461 // duplicated tests: basically, we allow ==, !=, >, <, >= and <=
3462 // but on top of that we want for == and != to use a special path
3463 // if we are comparing against null
3465 if ((oper
== Operator
.Equality
|| oper
== Operator
.Inequality
) && (left
is Constant
|| right
is Constant
)) {
3466 bool my_on_true
= oper
== Operator
.Inequality
? on_true
: !on_true
;
3469 // put the constant on the rhs, for simplicity
3471 if (left
is Constant
) {
3472 Expression swap
= right
;
3477 if (((Constant
) right
).IsZeroInteger
) {
3478 left
.EmitBranchable (ec
, target
, my_on_true
);
3481 if (right
.Type
== TypeManager
.bool_type
) {
3482 // right is a boolean, and it's not 'false' => it is 'true'
3483 left
.EmitBranchable (ec
, target
, !my_on_true
);
3487 } else if (oper
== Operator
.LogicalAnd
) {
3490 Label tests_end
= ig
.DefineLabel ();
3492 left
.EmitBranchable (ec
, tests_end
, false);
3493 right
.EmitBranchable (ec
, target
, true);
3494 ig
.MarkLabel (tests_end
);
3497 // This optimizes code like this
3498 // if (true && i > 4)
3500 if (!(left
is Constant
))
3501 left
.EmitBranchable (ec
, target
, false);
3503 if (!(right
is Constant
))
3504 right
.EmitBranchable (ec
, target
, false);
3509 } else if (oper
== Operator
.LogicalOr
){
3511 left
.EmitBranchable (ec
, target
, true);
3512 right
.EmitBranchable (ec
, target
, true);
3515 Label tests_end
= ig
.DefineLabel ();
3516 left
.EmitBranchable (ec
, tests_end
, true);
3517 right
.EmitBranchable (ec
, target
, false);
3518 ig
.MarkLabel (tests_end
);
3523 } else if (!(oper
== Operator
.LessThan
|| oper
== Operator
.GreaterThan
||
3524 oper
== Operator
.LessThanOrEqual
|| oper
== Operator
.GreaterThanOrEqual
||
3525 oper
== Operator
.Equality
|| oper
== Operator
.Inequality
)) {
3526 base.EmitBranchable (ec
, target
, on_true
);
3534 bool is_float
= IsFloat (t
);
3535 bool is_unsigned
= is_float
|| IsUnsigned (t
);
3538 case Operator
.Equality
:
3540 ig
.Emit (OpCodes
.Beq
, target
);
3542 ig
.Emit (OpCodes
.Bne_Un
, target
);
3545 case Operator
.Inequality
:
3547 ig
.Emit (OpCodes
.Bne_Un
, target
);
3549 ig
.Emit (OpCodes
.Beq
, target
);
3552 case Operator
.LessThan
:
3554 if (is_unsigned
&& !is_float
)
3555 ig
.Emit (OpCodes
.Blt_Un
, target
);
3557 ig
.Emit (OpCodes
.Blt
, target
);
3560 ig
.Emit (OpCodes
.Bge_Un
, target
);
3562 ig
.Emit (OpCodes
.Bge
, target
);
3565 case Operator
.GreaterThan
:
3567 if (is_unsigned
&& !is_float
)
3568 ig
.Emit (OpCodes
.Bgt_Un
, target
);
3570 ig
.Emit (OpCodes
.Bgt
, target
);
3573 ig
.Emit (OpCodes
.Ble_Un
, target
);
3575 ig
.Emit (OpCodes
.Ble
, target
);
3578 case Operator
.LessThanOrEqual
:
3580 if (is_unsigned
&& !is_float
)
3581 ig
.Emit (OpCodes
.Ble_Un
, target
);
3583 ig
.Emit (OpCodes
.Ble
, target
);
3586 ig
.Emit (OpCodes
.Bgt_Un
, target
);
3588 ig
.Emit (OpCodes
.Bgt
, target
);
3592 case Operator
.GreaterThanOrEqual
:
3594 if (is_unsigned
&& !is_float
)
3595 ig
.Emit (OpCodes
.Bge_Un
, target
);
3597 ig
.Emit (OpCodes
.Bge
, target
);
3600 ig
.Emit (OpCodes
.Blt_Un
, target
);
3602 ig
.Emit (OpCodes
.Blt
, target
);
3605 throw new InternalErrorException (oper
.ToString ());
3609 public override void Emit (EmitContext ec
)
3611 EmitOperator (ec
, left
.Type
);
3614 protected virtual void EmitOperator (EmitContext ec
, Type l
)
3616 ILGenerator ig
= ec
.ig
;
3619 // Handle short-circuit operators differently
3622 if ((oper
& Operator
.LogicalMask
) != 0) {
3623 Label load_result
= ig
.DefineLabel ();
3624 Label end
= ig
.DefineLabel ();
3626 bool is_or
= oper
== Operator
.LogicalOr
;
3627 left
.EmitBranchable (ec
, load_result
, is_or
);
3629 ig
.Emit (OpCodes
.Br_S
, end
);
3631 ig
.MarkLabel (load_result
);
3632 ig
.Emit (is_or
? OpCodes
.Ldc_I4_1
: OpCodes
.Ldc_I4_0
);
3638 // Optimize zero-based operations which cannot be optimized at expression level
3640 if (oper
== Operator
.Subtraction
) {
3641 var lc
= left
as IntegralConstant
;
3642 if (lc
!= null && lc
.IsDefaultValue
) {
3644 ig
.Emit (OpCodes
.Neg
);
3651 EmitOperatorOpcode (ec
, oper
, l
);
3654 // Nullable enum could require underlying type cast and we cannot simply wrap binary
3655 // expression because that would wrap lifted binary operation
3657 if (enum_conversion
!= null)
3658 enum_conversion
.Emit (ec
);
3661 public override void EmitSideEffect (EmitContext ec
)
3663 if ((oper
& Operator
.LogicalMask
) != 0 ||
3664 (ec
.HasSet (EmitContext
.Options
.CheckedScope
) && (oper
== Operator
.Multiply
|| oper
== Operator
.Addition
|| oper
== Operator
.Subtraction
))) {
3665 base.EmitSideEffect (ec
);
3667 left
.EmitSideEffect (ec
);
3668 right
.EmitSideEffect (ec
);
3672 protected override void CloneTo (CloneContext clonectx
, Expression t
)
3674 Binary target
= (Binary
) t
;
3676 target
.left
= left
.Clone (clonectx
);
3677 target
.right
= right
.Clone (clonectx
);
3680 public Expression
CreateCallSiteBinder (ResolveContext ec
, Arguments args
)
3682 Arguments binder_args
= new Arguments (3);
3684 MemberAccess sle
= new MemberAccess (new MemberAccess (
3685 new QualifiedAliasMember (QualifiedAliasMember
.GlobalAlias
, "System", loc
), "Linq", loc
), "Expressions", loc
);
3687 CSharpBinderFlags flags
= 0;
3688 if (ec
.HasSet (ResolveContext
.Options
.CheckedScope
))
3689 flags
= CSharpBinderFlags
.CheckedContext
;
3691 if ((oper
& Operator
.LogicalMask
) != 0)
3692 flags
|= CSharpBinderFlags
.BinaryOperationLogical
;
3694 binder_args
.Add (new Argument (new EnumConstant (new IntLiteral ((int) flags
, loc
), TypeManager
.binder_flags
)));
3695 binder_args
.Add (new Argument (new MemberAccess (new MemberAccess (sle
, "ExpressionType", loc
), GetOperatorExpressionTypeName (), loc
)));
3696 binder_args
.Add (new Argument (new ImplicitlyTypedArrayCreation ("[]", args
.CreateDynamicBinderArguments (ec
), loc
)));
3698 return new Invocation (DynamicExpressionStatement
.GetBinder ("BinaryOperation", loc
), binder_args
);
3701 public override Expression
CreateExpressionTree (ResolveContext ec
)
3703 return CreateExpressionTree (ec
, null);
3706 Expression
CreateExpressionTree (ResolveContext ec
, MethodGroupExpr method
)
3709 bool lift_arg
= false;
3712 case Operator
.Addition
:
3713 if (method
== null && ec
.HasSet (ResolveContext
.Options
.CheckedScope
) && !IsFloat (type
))
3714 method_name
= "AddChecked";
3716 method_name
= "Add";
3718 case Operator
.BitwiseAnd
:
3719 method_name
= "And";
3721 case Operator
.BitwiseOr
:
3724 case Operator
.Division
:
3725 method_name
= "Divide";
3727 case Operator
.Equality
:
3728 method_name
= "Equal";
3731 case Operator
.ExclusiveOr
:
3732 method_name
= "ExclusiveOr";
3734 case Operator
.GreaterThan
:
3735 method_name
= "GreaterThan";
3738 case Operator
.GreaterThanOrEqual
:
3739 method_name
= "GreaterThanOrEqual";
3742 case Operator
.Inequality
:
3743 method_name
= "NotEqual";
3746 case Operator
.LeftShift
:
3747 method_name
= "LeftShift";
3749 case Operator
.LessThan
:
3750 method_name
= "LessThan";
3753 case Operator
.LessThanOrEqual
:
3754 method_name
= "LessThanOrEqual";
3757 case Operator
.LogicalAnd
:
3758 method_name
= "AndAlso";
3760 case Operator
.LogicalOr
:
3761 method_name
= "OrElse";
3763 case Operator
.Modulus
:
3764 method_name
= "Modulo";
3766 case Operator
.Multiply
:
3767 if (method
== null && ec
.HasSet (ResolveContext
.Options
.CheckedScope
) && !IsFloat (type
))
3768 method_name
= "MultiplyChecked";
3770 method_name
= "Multiply";
3772 case Operator
.RightShift
:
3773 method_name
= "RightShift";
3775 case Operator
.Subtraction
:
3776 if (method
== null && ec
.HasSet (ResolveContext
.Options
.CheckedScope
) && !IsFloat (type
))
3777 method_name
= "SubtractChecked";
3779 method_name
= "Subtract";
3783 throw new InternalErrorException ("Unknown expression tree binary operator " + oper
);
3786 Arguments args
= new Arguments (2);
3787 args
.Add (new Argument (left
.CreateExpressionTree (ec
)));
3788 args
.Add (new Argument (right
.CreateExpressionTree (ec
)));
3789 if (method
!= null) {
3791 args
.Add (new Argument (new BoolConstant (false, loc
)));
3793 args
.Add (new Argument (method
.CreateExpressionTree (ec
)));
3796 return CreateExpressionFactoryCall (ec
, method_name
, args
);
3801 // Represents the operation a + b [+ c [+ d [+ ...]]], where a is a string
3802 // b, c, d... may be strings or objects.
3804 public class StringConcat
: Expression
{
3805 Arguments arguments
;
3807 public StringConcat (Expression left
, Expression right
, Location loc
)
3810 type
= TypeManager
.string_type
;
3811 eclass
= ExprClass
.Value
;
3813 arguments
= new Arguments (2);
3816 public static StringConcat
Create (ResolveContext rc
, Expression left
, Expression right
, Location loc
)
3818 if (left
.eclass
== ExprClass
.Unresolved
|| right
.eclass
== ExprClass
.Unresolved
)
3819 throw new ArgumentException ();
3821 var s
= new StringConcat (left
, right
, loc
);
3822 s
.Append (rc
, left
);
3823 s
.Append (rc
, right
);
3827 public override Expression
CreateExpressionTree (ResolveContext ec
)
3829 Argument arg
= arguments
[0];
3830 return CreateExpressionAddCall (ec
, arg
, arg
.CreateExpressionTree (ec
), 1);
3834 // Creates nested calls tree from an array of arguments used for IL emit
3836 Expression
CreateExpressionAddCall (ResolveContext ec
, Argument left
, Expression left_etree
, int pos
)
3838 Arguments concat_args
= new Arguments (2);
3839 Arguments add_args
= new Arguments (3);
3841 concat_args
.Add (left
);
3842 add_args
.Add (new Argument (left_etree
));
3844 concat_args
.Add (arguments
[pos
]);
3845 add_args
.Add (new Argument (arguments
[pos
].CreateExpressionTree (ec
)));
3847 MethodGroupExpr method
= CreateConcatMemberExpression ().Resolve (ec
) as MethodGroupExpr
;
3851 method
= method
.OverloadResolve (ec
, ref concat_args
, false, loc
);
3855 add_args
.Add (new Argument (method
.CreateExpressionTree (ec
)));
3857 Expression expr
= CreateExpressionFactoryCall (ec
, "Add", add_args
);
3858 if (++pos
== arguments
.Count
)
3861 left
= new Argument (new EmptyExpression (method
.BestCandidate
.ReturnType
));
3862 return CreateExpressionAddCall (ec
, left
, expr
, pos
);
3865 protected override Expression
DoResolve (ResolveContext ec
)
3870 void Append (ResolveContext rc
, Expression operand
)
3875 StringConstant sc
= operand
as StringConstant
;
3877 if (arguments
.Count
!= 0) {
3878 Argument last_argument
= arguments
[arguments
.Count
- 1];
3879 StringConstant last_expr_constant
= last_argument
.Expr
as StringConstant
;
3880 if (last_expr_constant
!= null) {
3881 last_argument
.Expr
= new StringConstant (
3882 last_expr_constant
.Value
+ sc
.Value
, sc
.Location
).Resolve (rc
);
3888 // Multiple (3+) concatenation are resolved as multiple StringConcat instances
3890 StringConcat concat_oper
= operand
as StringConcat
;
3891 if (concat_oper
!= null) {
3892 arguments
.AddRange (concat_oper
.arguments
);
3897 arguments
.Add (new Argument (operand
));
3900 Expression
CreateConcatMemberExpression ()
3902 return new MemberAccess (new MemberAccess (new QualifiedAliasMember ("global", "System", loc
), "String", loc
), "Concat", loc
);
3905 public override void Emit (EmitContext ec
)
3907 Expression concat
= new Invocation (CreateConcatMemberExpression (), arguments
, true);
3908 concat
= concat
.Resolve (new ResolveContext (ec
.MemberContext
));
3913 public override SLE
.Expression
MakeExpression (BuilderContext ctx
)
3915 if (arguments
.Count
!= 2)
3916 throw new NotImplementedException ("arguments.Count != 2");
3918 var concat
= TypeManager
.string_type
.GetMethod ("Concat", new[] { typeof (object), typeof (object) }
);
3919 return SLE
.Expression
.Add (arguments
[0].Expr
.MakeExpression (ctx
), arguments
[1].Expr
.MakeExpression (ctx
), concat
);
3922 public override void MutateHoistedGenericType (AnonymousMethodStorey storey
)
3924 arguments
.MutateHoistedGenericType (storey
);
3929 // User-defined conditional logical operator
3931 public class ConditionalLogicalOperator
: UserOperatorCall
{
3932 readonly bool is_and
;
3935 public ConditionalLogicalOperator (MethodGroupExpr oper_method
, Arguments arguments
,
3936 ExpressionTreeExpression expr_tree
, bool is_and
, Location loc
)
3937 : base (oper_method
, arguments
, expr_tree
, loc
)
3939 this.is_and
= is_and
;
3940 eclass
= ExprClass
.Unresolved
;
3943 protected override Expression
DoResolve (ResolveContext ec
)
3945 var method
= mg
.BestCandidate
;
3946 type
= TypeManager
.TypeToCoreType (method
.ReturnType
);
3947 AParametersCollection pd
= method
.Parameters
;
3948 if (!TypeManager
.IsEqual (type
, type
) || !TypeManager
.IsEqual (type
, pd
.Types
[0]) || !TypeManager
.IsEqual (type
, pd
.Types
[1])) {
3949 ec
.Report
.Error (217, loc
,
3950 "A user-defined operator `{0}' must have parameters and return values of the same type in order to be applicable as a short circuit operator",
3951 TypeManager
.CSharpSignature (method
.MetaInfo
));
3955 Expression left_dup
= new EmptyExpression (type
);
3956 Expression op_true
= GetOperatorTrue (ec
, left_dup
, loc
);
3957 Expression op_false
= GetOperatorFalse (ec
, left_dup
, loc
);
3958 if (op_true
== null || op_false
== null) {
3959 ec
.Report
.Error (218, loc
,
3960 "The type `{0}' must have operator `true' and operator `false' defined when `{1}' is used as a short circuit operator",
3961 TypeManager
.CSharpName (type
), TypeManager
.CSharpSignature (method
.MetaInfo
));
3965 oper
= is_and
? op_false
: op_true
;
3966 eclass
= ExprClass
.Value
;
3970 public override void Emit (EmitContext ec
)
3972 ILGenerator ig
= ec
.ig
;
3973 Label end_target
= ig
.DefineLabel ();
3976 // Emit and duplicate left argument
3978 arguments
[0].Expr
.Emit (ec
);
3979 ig
.Emit (OpCodes
.Dup
);
3980 arguments
.RemoveAt (0);
3982 oper
.EmitBranchable (ec
, end_target
, true);
3984 ig
.MarkLabel (end_target
);
3988 public class PointerArithmetic
: Expression
{
3989 Expression left
, right
;
3993 // We assume that `l' is always a pointer
3995 public PointerArithmetic (Binary
.Operator op
, Expression l
, Expression r
, Type t
, Location loc
)
4004 public override Expression
CreateExpressionTree (ResolveContext ec
)
4006 Error_PointerInsideExpressionTree (ec
);
4010 protected override Expression
DoResolve (ResolveContext ec
)
4012 eclass
= ExprClass
.Variable
;
4014 if (left
.Type
== TypeManager
.void_ptr_type
) {
4015 ec
.Report
.Error (242, loc
, "The operation in question is undefined on void pointers");
4022 public override void Emit (EmitContext ec
)
4024 Type op_type
= left
.Type
;
4025 ILGenerator ig
= ec
.ig
;
4027 // It must be either array or fixed buffer
4029 if (TypeManager
.HasElementType (op_type
)) {
4030 element
= TypeManager
.GetElementType (op_type
);
4032 FieldExpr fe
= left
as FieldExpr
;
4034 element
= ((FixedFieldSpec
) (fe
.Spec
)).ElementType
;
4039 int size
= GetTypeSize (element
);
4040 Type rtype
= right
.Type
;
4042 if ((op
& Binary
.Operator
.SubtractionMask
) != 0 && rtype
.IsPointer
){
4044 // handle (pointer - pointer)
4048 ig
.Emit (OpCodes
.Sub
);
4052 ig
.Emit (OpCodes
.Sizeof
, element
);
4054 IntLiteral
.EmitInt (ig
, size
);
4055 ig
.Emit (OpCodes
.Div
);
4057 ig
.Emit (OpCodes
.Conv_I8
);
4060 // handle + and - on (pointer op int)
4062 Constant left_const
= left
as Constant
;
4063 if (left_const
!= null) {
4065 // Optimize ((T*)null) pointer operations
4067 if (left_const
.IsDefaultValue
) {
4068 left
= EmptyExpression
.Null
;
4076 var right_const
= right
as Constant
;
4077 if (right_const
!= null) {
4079 // Optimize 0-based arithmetic
4081 if (right_const
.IsDefaultValue
)
4085 right
= new IntConstant (size
, right
.Location
);
4087 right
= new SizeOf (new TypeExpression (element
, right
.Location
), right
.Location
);
4089 // TODO: Should be the checks resolve context sensitive?
4090 ResolveContext rc
= new ResolveContext (ec
.MemberContext
, ResolveContext
.Options
.UnsafeScope
);
4091 right
= new Binary (Binary
.Operator
.Multiply
, right
, right_const
).Resolve (rc
);
4097 if (rtype
== TypeManager
.sbyte_type
|| rtype
== TypeManager
.byte_type
||
4098 rtype
== TypeManager
.short_type
|| rtype
== TypeManager
.ushort_type
) {
4099 ig
.Emit (OpCodes
.Conv_I
);
4100 } else if (rtype
== TypeManager
.uint32_type
) {
4101 ig
.Emit (OpCodes
.Conv_U
);
4104 if (right_const
== null && size
!= 1){
4106 ig
.Emit (OpCodes
.Sizeof
, element
);
4108 IntLiteral
.EmitInt (ig
, size
);
4109 if (rtype
== TypeManager
.int64_type
|| rtype
== TypeManager
.uint64_type
)
4110 ig
.Emit (OpCodes
.Conv_I8
);
4112 Binary
.EmitOperatorOpcode (ec
, Binary
.Operator
.Multiply
, rtype
);
4115 if (left_const
== null) {
4116 if (rtype
== TypeManager
.int64_type
)
4117 ig
.Emit (OpCodes
.Conv_I
);
4118 else if (rtype
== TypeManager
.uint64_type
)
4119 ig
.Emit (OpCodes
.Conv_U
);
4121 Binary
.EmitOperatorOpcode (ec
, op
, op_type
);
4128 // A boolean-expression is an expression that yields a result
4131 public class BooleanExpression
: ShimExpression
4133 public BooleanExpression (Expression expr
)
4136 this.loc
= expr
.Location
;
4139 public override Expression
CreateExpressionTree (ResolveContext ec
)
4141 // TODO: We should emit IsTrue (v4) instead of direct user operator
4142 // call but that would break csc compatibility
4143 return base.CreateExpressionTree (ec
);
4146 protected override Expression
DoResolve (ResolveContext ec
)
4148 // A boolean-expression is required to be of a type
4149 // that can be implicitly converted to bool or of
4150 // a type that implements operator true
4152 expr
= expr
.Resolve (ec
);
4156 Assign ass
= expr
as Assign
;
4157 if (ass
!= null && ass
.Source
is Constant
) {
4158 ec
.Report
.Warning (665, 3, loc
,
4159 "Assignment in conditional expression is always constant. Did you mean to use `==' instead ?");
4162 if (expr
.Type
== TypeManager
.bool_type
)
4165 if (TypeManager
.IsDynamicType (expr
.Type
)) {
4166 Arguments args
= new Arguments (1);
4167 args
.Add (new Argument (expr
));
4168 return new DynamicUnaryConversion ("IsTrue", args
, loc
).Resolve (ec
);
4171 type
= TypeManager
.bool_type
;
4172 Expression converted
= Convert
.ImplicitConversion (ec
, expr
, type
, loc
);
4173 if (converted
!= null)
4177 // If no implicit conversion to bool exists, try using `operator true'
4179 converted
= GetOperatorTrue (ec
, expr
, loc
);
4180 if (converted
== null) {
4181 expr
.Error_ValueCannotBeConverted (ec
, loc
, type
, false);
4190 /// Implements the ternary conditional operator (?:)
4192 public class Conditional
: Expression
{
4193 Expression expr
, true_expr
, false_expr
;
4195 public Conditional (BooleanExpression expr
, Expression true_expr
, Expression false_expr
)
4198 this.true_expr
= true_expr
;
4199 this.false_expr
= false_expr
;
4200 this.loc
= expr
.Location
;
4203 public Expression Expr
{
4209 public Expression TrueExpr
{
4215 public Expression FalseExpr
{
4221 public override Expression
CreateExpressionTree (ResolveContext ec
)
4223 Arguments args
= new Arguments (3);
4224 args
.Add (new Argument (expr
.CreateExpressionTree (ec
)));
4225 args
.Add (new Argument (true_expr
.CreateExpressionTree (ec
)));
4226 args
.Add (new Argument (false_expr
.CreateExpressionTree (ec
)));
4227 return CreateExpressionFactoryCall (ec
, "Condition", args
);
4230 protected override Expression
DoResolve (ResolveContext ec
)
4232 expr
= expr
.Resolve (ec
);
4233 true_expr
= true_expr
.Resolve (ec
);
4234 false_expr
= false_expr
.Resolve (ec
);
4236 if (true_expr
== null || false_expr
== null || expr
== null)
4239 eclass
= ExprClass
.Value
;
4240 Type true_type
= true_expr
.Type
;
4241 Type false_type
= false_expr
.Type
;
4245 // First, if an implicit conversion exists from true_expr
4246 // to false_expr, then the result type is of type false_expr.Type
4248 if (!TypeManager
.IsEqual (true_type
, false_type
)) {
4249 Expression conv
= Convert
.ImplicitConversion (ec
, true_expr
, false_type
, loc
);
4252 // Check if both can convert implicitly to each other's type
4254 if (Convert
.ImplicitConversion (ec
, false_expr
, true_type
, loc
) != null) {
4255 ec
.Report
.Error (172, loc
,
4256 "Type of conditional expression cannot be determined as `{0}' and `{1}' convert implicitly to each other",
4257 TypeManager
.CSharpName (true_type
), TypeManager
.CSharpName (false_type
));
4262 } else if ((conv
= Convert
.ImplicitConversion (ec
, false_expr
, true_type
, loc
)) != null) {
4265 ec
.Report
.Error (173, loc
,
4266 "Type of conditional expression cannot be determined because there is no implicit conversion between `{0}' and `{1}'",
4267 TypeManager
.CSharpName (true_type
), TypeManager
.CSharpName (false_type
));
4272 // Dead code optimalization
4273 Constant c
= expr
as Constant
;
4275 bool is_false
= c
.IsDefaultValue
;
4276 ec
.Report
.Warning (429, 4, is_false
? true_expr
.Location
: false_expr
.Location
, "Unreachable expression code detected");
4277 return ReducedExpression
.Create (is_false
? false_expr
: true_expr
, this).Resolve (ec
);
4283 public override void MutateHoistedGenericType (AnonymousMethodStorey storey
)
4285 expr
.MutateHoistedGenericType (storey
);
4286 true_expr
.MutateHoistedGenericType (storey
);
4287 false_expr
.MutateHoistedGenericType (storey
);
4288 type
= storey
.MutateType (type
);
4291 public override TypeExpr
ResolveAsTypeTerminal (IMemberContext ec
, bool silent
)
4296 public override void Emit (EmitContext ec
)
4298 ILGenerator ig
= ec
.ig
;
4299 Label false_target
= ig
.DefineLabel ();
4300 Label end_target
= ig
.DefineLabel ();
4302 expr
.EmitBranchable (ec
, false_target
, false);
4303 true_expr
.Emit (ec
);
4305 if (type
.IsInterface
) {
4306 LocalBuilder temp
= ec
.GetTemporaryLocal (type
);
4307 ig
.Emit (OpCodes
.Stloc
, temp
);
4308 ig
.Emit (OpCodes
.Ldloc
, temp
);
4309 ec
.FreeTemporaryLocal (temp
, type
);
4312 ig
.Emit (OpCodes
.Br
, end_target
);
4313 ig
.MarkLabel (false_target
);
4314 false_expr
.Emit (ec
);
4315 ig
.MarkLabel (end_target
);
4318 protected override void CloneTo (CloneContext clonectx
, Expression t
)
4320 Conditional target
= (Conditional
) t
;
4322 target
.expr
= expr
.Clone (clonectx
);
4323 target
.true_expr
= true_expr
.Clone (clonectx
);
4324 target
.false_expr
= false_expr
.Clone (clonectx
);
4328 public abstract class VariableReference
: Expression
, IAssignMethod
, IMemoryLocation
, IVariableReference
{
4329 LocalTemporary temp
;
4332 public abstract HoistedVariable
GetHoistedVariable (AnonymousExpression ae
);
4333 public abstract bool IsFixed { get; }
4334 public abstract bool IsRef { get; }
4335 public abstract string Name { get; }
4336 public abstract void SetHasAddressTaken ();
4339 // Variable IL data, it has to be protected to encapsulate hoisted variables
4341 protected abstract ILocalVariable Variable { get; }
4344 // Variable flow-analysis data
4346 public abstract VariableInfo VariableInfo { get; }
4349 public virtual void AddressOf (EmitContext ec
, AddressOp mode
)
4351 HoistedVariable hv
= GetHoistedVariable (ec
);
4353 hv
.AddressOf (ec
, mode
);
4357 Variable
.EmitAddressOf (ec
);
4360 public HoistedVariable
GetHoistedVariable (ResolveContext rc
)
4362 return GetHoistedVariable (rc
.CurrentAnonymousMethod
);
4365 public HoistedVariable
GetHoistedVariable (EmitContext ec
)
4367 return GetHoistedVariable (ec
.CurrentAnonymousMethod
);
4370 public override string GetSignatureForError ()
4375 public override void Emit (EmitContext ec
)
4380 public override void EmitSideEffect (EmitContext ec
)
4386 // This method is used by parameters that are references, that are
4387 // being passed as references: we only want to pass the pointer (that
4388 // is already stored in the parameter, not the address of the pointer,
4389 // and not the value of the variable).
4391 public void EmitLoad (EmitContext ec
)
4396 public void Emit (EmitContext ec
, bool leave_copy
)
4398 Report
.Debug (64, "VARIABLE EMIT", this, Variable
, type
, IsRef
, loc
);
4400 HoistedVariable hv
= GetHoistedVariable (ec
);
4402 hv
.Emit (ec
, leave_copy
);
4410 // If we are a reference, we loaded on the stack a pointer
4411 // Now lets load the real value
4413 LoadFromPtr (ec
.ig
, type
);
4417 ec
.ig
.Emit (OpCodes
.Dup
);
4420 temp
= new LocalTemporary (Type
);
4426 public void EmitAssign (EmitContext ec
, Expression source
, bool leave_copy
,
4427 bool prepare_for_load
)
4429 HoistedVariable hv
= GetHoistedVariable (ec
);
4431 hv
.EmitAssign (ec
, source
, leave_copy
, prepare_for_load
);
4435 New n_source
= source
as New
;
4436 if (n_source
!= null) {
4437 if (!n_source
.Emit (ec
, this)) {
4450 ec
.ig
.Emit (OpCodes
.Dup
);
4452 temp
= new LocalTemporary (Type
);
4458 StoreFromPtr (ec
.ig
, type
);
4460 Variable
.EmitAssign (ec
);
4468 public bool IsHoisted
{
4469 get { return GetHoistedVariable ((AnonymousExpression) null) != null; }
4472 public override void MutateHoistedGenericType (AnonymousMethodStorey storey
)
4474 type
= storey
.MutateType (type
);
4481 public class LocalVariableReference
: VariableReference
{
4482 readonly string name
;
4484 public LocalInfo local_info
;
4487 public LocalVariableReference (Block block
, string name
, Location l
)
4495 // Setting `is_readonly' to false will allow you to create a writable
4496 // reference to a read-only variable. This is used by foreach and using.
4498 public LocalVariableReference (Block block
, string name
, Location l
,
4499 LocalInfo local_info
, bool is_readonly
)
4500 : this (block
, name
, l
)
4502 this.local_info
= local_info
;
4503 this.is_readonly
= is_readonly
;
4506 public override VariableInfo VariableInfo
{
4507 get { return local_info.VariableInfo; }
4510 public override HoistedVariable
GetHoistedVariable (AnonymousExpression ae
)
4512 return local_info
.HoistedVariant
;
4516 // A local variable is always fixed
4518 public override bool IsFixed
{
4519 get { return true; }
4522 public override bool IsRef
{
4523 get { return false; }
4526 public bool IsReadOnly
{
4527 get { return is_readonly; }
4530 public override string Name
{
4531 get { return name; }
4534 public bool VerifyAssigned (ResolveContext ec
)
4536 VariableInfo variable_info
= local_info
.VariableInfo
;
4537 return variable_info
== null || variable_info
.IsAssigned (ec
, loc
);
4540 void ResolveLocalInfo ()
4542 if (local_info
== null) {
4543 local_info
= Block
.GetLocalInfo (Name
);
4544 type
= local_info
.VariableType
;
4545 is_readonly
= local_info
.ReadOnly
;
4549 public override void SetHasAddressTaken ()
4551 local_info
.AddressTaken
= true;
4554 public override Expression
CreateExpressionTree (ResolveContext ec
)
4556 HoistedVariable hv
= GetHoistedVariable (ec
);
4558 return hv
.CreateExpressionTree ();
4560 Arguments arg
= new Arguments (1);
4561 arg
.Add (new Argument (this));
4562 return CreateExpressionFactoryCall (ec
, "Constant", arg
);
4565 Expression
DoResolveBase (ResolveContext ec
)
4567 Expression e
= Block
.GetConstantExpression (Name
);
4569 return e
.Resolve (ec
);
4571 VerifyAssigned (ec
);
4574 // If we are referencing a variable from the external block
4575 // flag it for capturing
4577 if (ec
.MustCaptureVariable (local_info
)) {
4578 if (local_info
.AddressTaken
)
4579 AnonymousMethodExpression
.Error_AddressOfCapturedVar (ec
, this, loc
);
4581 if (ec
.IsVariableCapturingRequired
) {
4582 AnonymousMethodStorey storey
= local_info
.Block
.Explicit
.CreateAnonymousMethodStorey (ec
);
4583 storey
.CaptureLocalVariable (ec
, local_info
);
4587 eclass
= ExprClass
.Variable
;
4588 type
= local_info
.VariableType
;
4592 protected override Expression
DoResolve (ResolveContext ec
)
4594 ResolveLocalInfo ();
4595 local_info
.Used
= true;
4597 if (type
== null && local_info
.Type
is VarExpr
) {
4598 local_info
.VariableType
= TypeManager
.object_type
;
4599 Error_VariableIsUsedBeforeItIsDeclared (ec
.Report
, Name
);
4603 return DoResolveBase (ec
);
4606 public override Expression
DoResolveLValue (ResolveContext ec
, Expression right_side
)
4608 ResolveLocalInfo ();
4611 if (right_side
== EmptyExpression
.OutAccess
.Instance
)
4612 local_info
.Used
= true;
4614 // Infer implicitly typed local variable
4616 VarExpr ve
= local_info
.Type
as VarExpr
;
4618 if (!ve
.InferType (ec
, right_side
))
4620 type
= local_info
.VariableType
= ve
.Type
;
4627 if (right_side
== EmptyExpression
.OutAccess
.Instance
) {
4628 code
= 1657; msg
= "Cannot pass `{0}' as a ref or out argument because it is a `{1}'";
4629 } else if (right_side
== EmptyExpression
.LValueMemberAccess
) {
4630 code
= 1654; msg
= "Cannot assign to members of `{0}' because it is a `{1}'";
4631 } else if (right_side
== EmptyExpression
.LValueMemberOutAccess
) {
4632 code
= 1655; msg
= "Cannot pass members of `{0}' as ref or out arguments because it is a `{1}'";
4633 } else if (right_side
== EmptyExpression
.UnaryAddress
) {
4634 code
= 459; msg
= "Cannot take the address of {1} `{0}'";
4636 code
= 1656; msg
= "Cannot assign to `{0}' because it is a `{1}'";
4638 ec
.Report
.Error (code
, loc
, msg
, Name
, local_info
.GetReadOnlyContext ());
4639 } else if (VariableInfo
!= null) {
4640 VariableInfo
.SetAssigned (ec
);
4643 return DoResolveBase (ec
);
4646 public override int GetHashCode ()
4648 return Name
.GetHashCode ();
4651 public override bool Equals (object obj
)
4653 LocalVariableReference lvr
= obj
as LocalVariableReference
;
4657 return Name
== lvr
.Name
&& Block
== lvr
.Block
;
4660 protected override ILocalVariable Variable
{
4661 get { return local_info; }
4664 public override string ToString ()
4666 return String
.Format ("{0} ({1}:{2})", GetType (), Name
, loc
);
4669 protected override void CloneTo (CloneContext clonectx
, Expression t
)
4671 LocalVariableReference target
= (LocalVariableReference
) t
;
4673 target
.Block
= clonectx
.LookupBlock (Block
);
4674 if (local_info
!= null)
4675 target
.local_info
= clonectx
.LookupVariable (local_info
);
4680 /// This represents a reference to a parameter in the intermediate
4683 public class ParameterReference
: VariableReference
{
4684 readonly ToplevelParameterInfo pi
;
4686 public ParameterReference (ToplevelParameterInfo pi
, Location loc
)
4692 public override bool IsRef
{
4693 get { return (pi.Parameter.ModFlags & Parameter.Modifier.ISBYREF) != 0; }
4696 bool HasOutModifier
{
4697 get { return pi.Parameter.ModFlags == Parameter.Modifier.OUT; }
4700 public override HoistedVariable
GetHoistedVariable (AnonymousExpression ae
)
4702 return pi
.Parameter
.HoistedVariant
;
4706 // A ref or out parameter is classified as a moveable variable, even
4707 // if the argument given for the parameter is a fixed variable
4709 public override bool IsFixed
{
4710 get { return !IsRef; }
4713 public override string Name
{
4714 get { return Parameter.Name; }
4717 public Parameter Parameter
{
4718 get { return pi.Parameter; }
4721 public override VariableInfo VariableInfo
{
4722 get { return pi.VariableInfo; }
4725 protected override ILocalVariable Variable
{
4726 get { return Parameter; }
4729 public bool IsAssigned (ResolveContext ec
, Location loc
)
4731 // HACK: Variables are not captured in probing mode
4732 if (ec
.IsInProbingMode
)
4735 if (!ec
.DoFlowAnalysis
|| !HasOutModifier
|| ec
.CurrentBranching
.IsAssigned (VariableInfo
))
4738 ec
.Report
.Error (269, loc
, "Use of unassigned out parameter `{0}'", Name
);
4742 public override void SetHasAddressTaken ()
4744 Parameter
.HasAddressTaken
= true;
4747 void SetAssigned (ResolveContext ec
)
4749 if (HasOutModifier
&& ec
.DoFlowAnalysis
)
4750 ec
.CurrentBranching
.SetAssigned (VariableInfo
);
4753 bool DoResolveBase (ResolveContext ec
)
4755 type
= pi
.ParameterType
;
4756 eclass
= ExprClass
.Variable
;
4758 AnonymousExpression am
= ec
.CurrentAnonymousMethod
;
4762 Block b
= ec
.CurrentBlock
;
4765 IParameterData
[] p
= b
.Toplevel
.Parameters
.FixedParameters
;
4766 for (int i
= 0; i
< p
.Length
; ++i
) {
4767 if (p
[i
] != Parameter
)
4771 // Don't capture local parameters
4773 if (b
== ec
.CurrentBlock
.Toplevel
&& !am
.IsIterator
)
4777 ec
.Report
.Error (1628, loc
,
4778 "Parameter `{0}' cannot be used inside `{1}' when using `ref' or `out' modifier",
4779 Name
, am
.ContainerType
);
4782 if (pi
.Parameter
.HasAddressTaken
)
4783 AnonymousMethodExpression
.Error_AddressOfCapturedVar (ec
, this, loc
);
4785 if (ec
.IsVariableCapturingRequired
&& !b
.Toplevel
.IsExpressionTree
) {
4786 AnonymousMethodStorey storey
= pi
.Block
.CreateAnonymousMethodStorey (ec
);
4787 storey
.CaptureParameter (ec
, this);
4799 public override int GetHashCode ()
4801 return Name
.GetHashCode ();
4804 public override bool Equals (object obj
)
4806 ParameterReference pr
= obj
as ParameterReference
;
4810 return Name
== pr
.Name
;
4813 public override void AddressOf (EmitContext ec
, AddressOp mode
)
4816 // ParameterReferences might already be a reference
4823 base.AddressOf (ec
, mode
);
4826 protected override void CloneTo (CloneContext clonectx
, Expression target
)
4831 public override Expression
CreateExpressionTree (ResolveContext ec
)
4833 HoistedVariable hv
= GetHoistedVariable (ec
);
4835 return hv
.CreateExpressionTree ();
4837 return Parameter
.ExpressionTreeVariableReference ();
4841 // Notice that for ref/out parameters, the type exposed is not the
4842 // same type exposed externally.
4845 // externally we expose "int&"
4846 // here we expose "int".
4848 // We record this in "is_ref". This means that the type system can treat
4849 // the type as it is expected, but when we generate the code, we generate
4850 // the alternate kind of code.
4852 protected override Expression
DoResolve (ResolveContext ec
)
4854 if (!DoResolveBase (ec
))
4857 // HACK: Variables are not captured in probing mode
4858 if (ec
.IsInProbingMode
)
4861 if (HasOutModifier
&& ec
.DoFlowAnalysis
&&
4862 (!ec
.OmitStructFlowAnalysis
|| !VariableInfo
.TypeInfo
.IsStruct
) && !IsAssigned (ec
, loc
))
4868 override public Expression
DoResolveLValue (ResolveContext ec
, Expression right_side
)
4870 if (!DoResolveBase (ec
))
4873 // HACK: parameters are not captured when probing is on
4874 if (!ec
.IsInProbingMode
)
4880 static public void EmitLdArg (ILGenerator ig
, int x
)
4883 case 0: ig
.Emit (OpCodes
.Ldarg_0
); break;
4884 case 1: ig
.Emit (OpCodes
.Ldarg_1
); break;
4885 case 2: ig
.Emit (OpCodes
.Ldarg_2
); break;
4886 case 3: ig
.Emit (OpCodes
.Ldarg_3
); break;
4888 if (x
> byte.MaxValue
)
4889 ig
.Emit (OpCodes
.Ldarg
, x
);
4891 ig
.Emit (OpCodes
.Ldarg_S
, (byte) x
);
4898 /// Invocation of methods or delegates.
4900 public class Invocation
: ExpressionStatement
4902 protected Arguments arguments
;
4903 protected Expression expr
;
4904 protected MethodGroupExpr mg
;
4905 bool arguments_resolved
;
4908 // arguments is an ArrayList, but we do not want to typecast,
4909 // as it might be null.
4911 public Invocation (Expression expr
, Arguments arguments
)
4913 SimpleName sn
= expr
as SimpleName
;
4915 this.expr
= sn
.GetMethodGroup ();
4919 this.arguments
= arguments
;
4921 loc
= expr
.Location
;
4924 public Invocation (Expression expr
, Arguments arguments
, bool arguments_resolved
)
4925 : this (expr
, arguments
)
4927 this.arguments_resolved
= arguments_resolved
;
4930 public override Expression
CreateExpressionTree (ResolveContext ec
)
4932 Expression instance
= mg
.IsInstance
?
4933 mg
.InstanceExpression
.CreateExpressionTree (ec
) :
4934 new NullLiteral (loc
);
4936 var args
= Arguments
.CreateForExpressionTree (ec
, arguments
,
4938 mg
.CreateExpressionTree (ec
));
4941 MemberExpr
.Error_BaseAccessInExpressionTree (ec
, loc
);
4943 return CreateExpressionFactoryCall (ec
, "Call", args
);
4946 protected override Expression
DoResolve (ResolveContext ec
)
4948 Expression member_expr
= expr
.Resolve (ec
, ResolveFlags
.VariableOrValue
| ResolveFlags
.MethodGroup
);
4949 if (member_expr
== null)
4953 // Next, evaluate all the expressions in the argument list
4955 bool dynamic_arg
= false;
4956 if (arguments
!= null && !arguments_resolved
)
4957 arguments
.Resolve (ec
, out dynamic_arg
);
4959 Type expr_type
= member_expr
.Type
;
4960 mg
= member_expr
as MethodGroupExpr
;
4962 bool dynamic_member
= TypeManager
.IsDynamicType (expr_type
);
4964 if (!dynamic_member
) {
4965 Expression invoke
= null;
4968 if (expr_type
!= null && TypeManager
.IsDelegateType (expr_type
)) {
4969 invoke
= new DelegateInvocation (member_expr
, arguments
, loc
);
4970 invoke
= invoke
.Resolve (ec
);
4971 if (invoke
== null || !dynamic_arg
)
4974 MemberExpr me
= member_expr
as MemberExpr
;
4976 member_expr
.Error_UnexpectedKind (ec
, ResolveFlags
.MethodGroup
, loc
);
4980 mg
= ec
.LookupExtensionMethod (me
.Type
, me
.Name
, loc
);
4982 ec
.Report
.Error (1955, loc
, "The member `{0}' cannot be used as method or delegate",
4983 member_expr
.GetSignatureForError ());
4987 ((ExtensionMethodGroupExpr
) mg
).ExtensionExpression
= me
.InstanceExpression
;
4991 if (invoke
== null) {
4992 mg
= DoResolveOverload (ec
);
4998 if (dynamic_arg
|| dynamic_member
)
4999 return DoResolveDynamic (ec
, member_expr
);
5001 var method
= mg
.BestCandidate
;
5002 if (method
!= null) {
5003 type
= TypeManager
.TypeToCoreType (method
.ReturnType
);
5005 // TODO: this is a copy of mg.ResolveMemberAccess method
5006 Expression iexpr
= mg
.InstanceExpression
;
5007 if (method
.IsStatic
) {
5008 if (iexpr
== null ||
5009 iexpr
is This
|| iexpr
is EmptyExpression
||
5010 mg
.IdenticalTypeName
) {
5011 mg
.InstanceExpression
= null;
5013 MemberExpr
.error176 (ec
, loc
, mg
.GetSignatureForError ());
5017 if (iexpr
== null || iexpr
== EmptyExpression
.Null
) {
5018 SimpleName
.Error_ObjectRefRequired (ec
, loc
, mg
.GetSignatureForError ());
5024 // Only base will allow this invocation to happen.
5026 if (mg
.IsBase
&& method
.IsAbstract
){
5027 Error_CannotCallAbstractBase (ec
, TypeManager
.CSharpSignature (method
));
5031 if (arguments
== null && method
.DeclaringType
== TypeManager
.object_type
&& method
.Name
== Destructor
.MetadataName
) {
5033 ec
.Report
.Error (250, loc
, "Do not directly call your base class Finalize method. It is called automatically from your destructor");
5035 ec
.Report
.Error (245, loc
, "Destructors and object.Finalize cannot be called directly. Consider calling IDisposable.Dispose if available");
5039 IsSpecialMethodInvocation (ec
, method
, loc
);
5041 if (mg
.InstanceExpression
!= null)
5042 mg
.InstanceExpression
.CheckMarshalByRefAccess (ec
);
5044 eclass
= ExprClass
.Value
;
5048 Expression
DoResolveDynamic (ResolveContext ec
, Expression memberExpr
)
5051 DynamicMemberBinder dmb
= memberExpr
as DynamicMemberBinder
;
5053 args
= dmb
.Arguments
;
5054 if (arguments
!= null)
5055 args
.AddRange (arguments
);
5056 } else if (mg
== null) {
5057 if (arguments
== null)
5058 args
= new Arguments (1);
5062 args
.Insert (0, new Argument (memberExpr
));
5066 ec
.Report
.Error (1971, loc
,
5067 "The base call to method `{0}' cannot be dynamically dispatched. Consider casting the dynamic arguments or eliminating the base access",
5074 if (mg
.IsStatic
!= mg
.IsInstance
) {
5076 args
= new Arguments (1);
5079 args
.Insert (0, new Argument (new TypeOf (new TypeExpression (mg
.DeclaringType
, loc
), loc
).Resolve (ec
), Argument
.AType
.DynamicTypeName
));
5081 MemberAccess ma
= expr
as MemberAccess
;
5083 args
.Insert (0, new Argument (ma
.Left
.Resolve (ec
)));
5085 args
.Insert (0, new Argument (new This (loc
).Resolve (ec
)));
5090 return new DynamicInvocation (expr
as ATypeNameExpression
, args
, loc
).Resolve (ec
);
5093 protected virtual MethodGroupExpr
DoResolveOverload (ResolveContext ec
)
5095 return mg
.OverloadResolve (ec
, ref arguments
, false, loc
);
5098 public static bool IsSpecialMethodInvocation (ResolveContext ec
, MethodSpec method
, Location loc
)
5100 if (!TypeManager
.IsSpecialMethod (method
.MetaInfo
))
5103 if (ec
.HasSet (ResolveContext
.Options
.InvokeSpecialName
))
5106 ec
.Report
.SymbolRelatedToPreviousError (method
.MetaInfo
);
5107 ec
.Report
.Error (571, loc
, "`{0}': cannot explicitly call operator or accessor",
5108 TypeManager
.CSharpSignature (method
.MetaInfo
, true));
5113 static Type
[] GetVarargsTypes (MethodSpec mb
, Arguments arguments
)
5115 AParametersCollection pd
= mb
.Parameters
;
5117 Argument a
= arguments
[pd
.Count
- 1];
5118 Arglist list
= (Arglist
) a
.Expr
;
5120 return list
.ArgumentTypes
;
5124 /// This checks the ConditionalAttribute on the method
5126 public static bool IsMethodExcluded (MethodSpec method
, Location loc
)
5128 if (method
.IsConstructor
)
5131 var mb
= TypeManager
.DropGenericMethodArguments (method
.MetaInfo
);
5132 if (TypeManager
.IsBeingCompiled (mb
)) {
5133 IMethodData md
= TypeManager
.GetMethod (mb
);
5135 return md
.IsExcluded ();
5137 // For some methods (generated by delegate class) GetMethod returns null
5138 // because they are not included in builder_to_method table
5142 return AttributeTester
.IsConditionalMethodExcluded (mb
, loc
);
5146 /// is_base tells whether we want to force the use of the `call'
5147 /// opcode instead of using callvirt. Call is required to call
5148 /// a specific method, while callvirt will always use the most
5149 /// recent method in the vtable.
5151 /// is_static tells whether this is an invocation on a static method
5153 /// instance_expr is an expression that represents the instance
5154 /// it must be non-null if is_static is false.
5156 /// method is the method to invoke.
5158 /// Arguments is the list of arguments to pass to the method or constructor.
5160 public static void EmitCall (EmitContext ec
, bool is_base
,
5161 Expression instance_expr
,
5162 MethodSpec method
, Arguments Arguments
, Location loc
)
5164 EmitCall (ec
, is_base
, instance_expr
, method
, Arguments
, loc
, false, false);
5167 // `dup_args' leaves an extra copy of the arguments on the stack
5168 // `omit_args' does not leave any arguments at all.
5169 // So, basically, you could make one call with `dup_args' set to true,
5170 // and then another with `omit_args' set to true, and the two calls
5171 // would have the same set of arguments. However, each argument would
5172 // only have been evaluated once.
5173 public static void EmitCall (EmitContext ec
, bool is_base
,
5174 Expression instance_expr
,
5175 MethodSpec method
, Arguments Arguments
, Location loc
,
5176 bool dup_args
, bool omit_args
)
5178 ILGenerator ig
= ec
.ig
;
5179 bool struct_call
= false;
5180 bool this_call
= false;
5181 LocalTemporary this_arg
= null;
5183 Type decl_type
= method
.DeclaringType
;
5185 if (IsMethodExcluded (method
, loc
))
5188 bool is_static
= method
.IsStatic
;
5190 this_call
= instance_expr
is This
;
5191 if (TypeManager
.IsStruct (decl_type
) || TypeManager
.IsEnumType (decl_type
))
5195 // If this is ourselves, push "this"
5199 Type iexpr_type
= instance_expr
.Type
;
5202 // Push the instance expression
5204 if (TypeManager
.IsValueType (iexpr_type
) || TypeManager
.IsGenericParameter (iexpr_type
)) {
5206 // Special case: calls to a function declared in a
5207 // reference-type with a value-type argument need
5208 // to have their value boxed.
5209 if (TypeManager
.IsStruct (decl_type
) ||
5210 TypeManager
.IsGenericParameter (iexpr_type
)) {
5212 // If the expression implements IMemoryLocation, then
5213 // we can optimize and use AddressOf on the
5216 // If not we have to use some temporary storage for
5218 if (instance_expr
is IMemoryLocation
) {
5219 ((IMemoryLocation
)instance_expr
).
5220 AddressOf (ec
, AddressOp
.LoadStore
);
5222 LocalTemporary temp
= new LocalTemporary (iexpr_type
);
5223 instance_expr
.Emit (ec
);
5225 temp
.AddressOf (ec
, AddressOp
.Load
);
5228 // avoid the overhead of doing this all the time.
5230 t
= TypeManager
.GetReferenceType (iexpr_type
);
5232 instance_expr
.Emit (ec
);
5234 // FIXME: should use instance_expr is IMemoryLocation + constraint.
5235 // to help JIT to produce better code
5236 ig
.Emit (OpCodes
.Box
, instance_expr
.Type
);
5237 t
= TypeManager
.object_type
;
5240 instance_expr
.Emit (ec
);
5241 t
= instance_expr
.Type
;
5245 ig
.Emit (OpCodes
.Dup
);
5246 if (Arguments
!= null && Arguments
.Count
!= 0) {
5247 this_arg
= new LocalTemporary (t
);
5248 this_arg
.Store (ec
);
5254 if (!omit_args
&& Arguments
!= null)
5255 Arguments
.Emit (ec
, dup_args
, this_arg
);
5258 if (is_static
|| struct_call
|| is_base
|| (this_call
&& !method
.IsVirtual
)) {
5259 call_op
= OpCodes
.Call
;
5261 call_op
= OpCodes
.Callvirt
;
5263 if ((instance_expr
!= null) && (instance_expr
.Type
.IsGenericParameter
))
5264 ig
.Emit (OpCodes
.Constrained
, instance_expr
.Type
);
5267 if ((method
.MetaInfo
.CallingConvention
& CallingConventions
.VarArgs
) != 0) {
5268 Type
[] varargs_types
= GetVarargsTypes (method
, Arguments
);
5269 ig
.EmitCall (call_op
, (MethodInfo
) method
.MetaInfo
, varargs_types
);
5276 // and DoFoo is not virtual, you can omit the callvirt,
5277 // because you don't need the null checking behavior.
5279 if (method
.IsConstructor
)
5280 ig
.Emit (call_op
, (ConstructorInfo
) method
.MetaInfo
);
5282 ig
.Emit (call_op
, (MethodInfo
) method
.MetaInfo
);
5285 public override void Emit (EmitContext ec
)
5287 mg
.EmitCall (ec
, arguments
);
5290 public override void EmitStatement (EmitContext ec
)
5295 // Pop the return value if there is one
5297 if (TypeManager
.TypeToCoreType (type
) != TypeManager
.void_type
)
5298 ec
.ig
.Emit (OpCodes
.Pop
);
5301 protected override void CloneTo (CloneContext clonectx
, Expression t
)
5303 Invocation target
= (Invocation
) t
;
5305 if (arguments
!= null)
5306 target
.arguments
= arguments
.Clone (clonectx
);
5308 target
.expr
= expr
.Clone (clonectx
);
5311 public override SLE
.Expression
MakeExpression (BuilderContext ctx
)
5313 return MakeExpression (ctx
, mg
.InstanceExpression
, (MethodSpec
) mg
, arguments
);
5316 public static SLE
.Expression
MakeExpression (BuilderContext ctx
, Expression instance
, MethodSpec mi
, Arguments args
)
5318 var instance_expr
= instance
== null ? null : instance
.MakeExpression (ctx
);
5319 return SLE
.Expression
.Call (instance_expr
, (MethodInfo
) mi
.MetaInfo
, Arguments
.MakeExpression (args
, ctx
));
5322 public override void MutateHoistedGenericType (AnonymousMethodStorey storey
)
5324 mg
.MutateHoistedGenericType (storey
);
5325 type
= storey
.MutateType (type
);
5326 if (arguments
!= null) {
5327 arguments
.MutateHoistedGenericType (storey
);
5333 /// Implements the new expression
5335 public class New
: ExpressionStatement
, IMemoryLocation
{
5336 protected Arguments Arguments
;
5339 // During bootstrap, it contains the RequestedType,
5340 // but if `type' is not null, it *might* contain a NewDelegate
5341 // (because of field multi-initialization)
5343 protected Expression RequestedType
;
5345 protected MethodGroupExpr method
;
5347 bool is_type_parameter
;
5349 public New (Expression requested_type
, Arguments arguments
, Location l
)
5351 RequestedType
= requested_type
;
5352 Arguments
= arguments
;
5357 /// Converts complex core type syntax like 'new int ()' to simple constant
5359 public static Constant
Constantify (Type t
)
5361 if (t
== TypeManager
.int32_type
)
5362 return new IntConstant (0, Location
.Null
);
5363 if (t
== TypeManager
.uint32_type
)
5364 return new UIntConstant (0, Location
.Null
);
5365 if (t
== TypeManager
.int64_type
)
5366 return new LongConstant (0, Location
.Null
);
5367 if (t
== TypeManager
.uint64_type
)
5368 return new ULongConstant (0, Location
.Null
);
5369 if (t
== TypeManager
.float_type
)
5370 return new FloatConstant (0, Location
.Null
);
5371 if (t
== TypeManager
.double_type
)
5372 return new DoubleConstant (0, Location
.Null
);
5373 if (t
== TypeManager
.short_type
)
5374 return new ShortConstant (0, Location
.Null
);
5375 if (t
== TypeManager
.ushort_type
)
5376 return new UShortConstant (0, Location
.Null
);
5377 if (t
== TypeManager
.sbyte_type
)
5378 return new SByteConstant (0, Location
.Null
);
5379 if (t
== TypeManager
.byte_type
)
5380 return new ByteConstant (0, Location
.Null
);
5381 if (t
== TypeManager
.char_type
)
5382 return new CharConstant ('\0', Location
.Null
);
5383 if (t
== TypeManager
.bool_type
)
5384 return new BoolConstant (false, Location
.Null
);
5385 if (t
== TypeManager
.decimal_type
)
5386 return new DecimalConstant (0, Location
.Null
);
5387 if (TypeManager
.IsEnumType (t
))
5388 return new EnumConstant (Constantify (TypeManager
.GetEnumUnderlyingType (t
)), t
);
5389 if (TypeManager
.IsNullableType (t
))
5390 return Nullable
.LiftedNull
.Create (t
, Location
.Null
);
5396 // Checks whether the type is an interface that has the
5397 // [ComImport, CoClass] attributes and must be treated
5400 public Expression
CheckComImport (ResolveContext ec
)
5402 if (!type
.IsInterface
)
5406 // Turn the call into:
5407 // (the-interface-stated) (new class-referenced-in-coclassattribute ())
5409 Type real_class
= AttributeTester
.GetCoClassAttribute (type
);
5410 if (real_class
== null)
5413 New proxy
= new New (new TypeExpression (real_class
, loc
), Arguments
, loc
);
5414 Cast cast
= new Cast (new TypeExpression (type
, loc
), proxy
, loc
);
5415 return cast
.Resolve (ec
);
5418 public override Expression
CreateExpressionTree (ResolveContext ec
)
5421 if (method
== null) {
5422 args
= new Arguments (1);
5423 args
.Add (new Argument (new TypeOf (new TypeExpression (type
, loc
), loc
)));
5425 args
= Arguments
.CreateForExpressionTree (ec
,
5427 method
.CreateExpressionTree (ec
));
5430 return CreateExpressionFactoryCall (ec
, "New", args
);
5433 protected override Expression
DoResolve (ResolveContext ec
)
5436 // The New DoResolve might be called twice when initializing field
5437 // expressions (see EmitFieldInitializers, the call to
5438 // GetInitializerExpression will perform a resolve on the expression,
5439 // and later the assign will trigger another resolution
5441 // This leads to bugs (#37014)
5444 if (RequestedType
is NewDelegate
)
5445 return RequestedType
;
5449 TypeExpr texpr
= RequestedType
.ResolveAsTypeTerminal (ec
, false);
5455 if (type
.IsPointer
) {
5456 ec
.Report
.Error (1919, loc
, "Unsafe type `{0}' cannot be used in an object creation expression",
5457 TypeManager
.CSharpName (type
));
5461 if (Arguments
== null) {
5462 Constant c
= Constantify (type
);
5464 return ReducedExpression
.Create (c
.Resolve (ec
), this);
5467 if (TypeManager
.IsDelegateType (type
)) {
5468 return (new NewDelegate (type
, Arguments
, loc
)).Resolve (ec
);
5471 if (TypeManager
.IsGenericParameter (type
)) {
5472 GenericConstraints gc
= TypeManager
.GetTypeParameterConstraints (type
);
5474 if ((gc
== null) || (!gc
.HasConstructorConstraint
&& !gc
.IsValueType
)) {
5475 ec
.Report
.Error (304, loc
,
5476 "Cannot create an instance of the variable type '{0}' because it doesn't have the new() constraint",
5477 TypeManager
.CSharpName (type
));
5481 if ((Arguments
!= null) && (Arguments
.Count
!= 0)) {
5482 ec
.Report
.Error (417, loc
,
5483 "`{0}': cannot provide arguments when creating an instance of a variable type",
5484 TypeManager
.CSharpName (type
));
5488 if (TypeManager
.activator_create_instance
== null) {
5489 Type activator_type
= TypeManager
.CoreLookupType (ec
.Compiler
, "System", "Activator", MemberKind
.Class
, true);
5490 if (activator_type
!= null) {
5491 TypeManager
.activator_create_instance
= TypeManager
.GetPredefinedMethod (
5492 activator_type
, "CreateInstance", loc
, Type
.EmptyTypes
);
5496 is_type_parameter
= true;
5497 eclass
= ExprClass
.Value
;
5501 if (type
.IsAbstract
&& type
.IsSealed
) {
5502 ec
.Report
.SymbolRelatedToPreviousError (type
);
5503 ec
.Report
.Error (712, loc
, "Cannot create an instance of the static class `{0}'", TypeManager
.CSharpName (type
));
5507 if (type
.IsInterface
|| type
.IsAbstract
){
5508 if (!TypeManager
.IsGenericType (type
)) {
5509 RequestedType
= CheckComImport (ec
);
5510 if (RequestedType
!= null)
5511 return RequestedType
;
5514 ec
.Report
.SymbolRelatedToPreviousError (type
);
5515 ec
.Report
.Error (144, loc
, "Cannot create an instance of the abstract class or interface `{0}'", TypeManager
.CSharpName (type
));
5519 bool is_struct
= TypeManager
.IsStruct (type
);
5520 eclass
= ExprClass
.Value
;
5523 // SRE returns a match for .ctor () on structs (the object constructor),
5524 // so we have to manually ignore it.
5526 if (is_struct
&& Arguments
== null)
5529 // For member-lookup, treat 'new Foo (bar)' as call to 'foo.ctor (bar)', where 'foo' is of type 'Foo'.
5530 Expression ml
= MemberLookupFinal (ec
, type
, type
, ConstructorInfo
.ConstructorName
,
5531 MemberTypes
.Constructor
, AllBindingFlags
| BindingFlags
.DeclaredOnly
, loc
);
5534 if (Arguments
!= null) {
5535 Arguments
.Resolve (ec
, out dynamic);
5543 method
= ml
as MethodGroupExpr
;
5544 if (method
== null) {
5545 ml
.Error_UnexpectedKind (ec
, ResolveFlags
.MethodGroup
, loc
);
5549 method
= method
.OverloadResolve (ec
, ref Arguments
, false, loc
);
5554 Arguments
.Insert (0, new Argument (new TypeOf (texpr
, loc
).Resolve (ec
), Argument
.AType
.DynamicTypeName
));
5555 return new DynamicConstructorBinder (type
, Arguments
, loc
).Resolve (ec
);
5561 bool DoEmitTypeParameter (EmitContext ec
)
5563 ILGenerator ig
= ec
.ig
;
5565 MethodInfo ci
= (MethodInfo
) TypeManager
.activator_create_instance
.MetaInfo
;
5566 ci
= ci
.MakeGenericMethod (new Type
[] { type }
);
5568 GenericConstraints gc
= TypeManager
.GetTypeParameterConstraints (type
);
5569 if (gc
.HasReferenceTypeConstraint
|| gc
.HasClassConstraint
) {
5570 ig
.Emit (OpCodes
.Call
, ci
);
5574 // Allow DoEmit() to be called multiple times.
5575 // We need to create a new LocalTemporary each time since
5576 // you can't share LocalBuilders among ILGeneators.
5577 LocalTemporary temp
= new LocalTemporary (type
);
5579 Label label_activator
= ig
.DefineLabel ();
5580 Label label_end
= ig
.DefineLabel ();
5582 temp
.AddressOf (ec
, AddressOp
.Store
);
5583 ig
.Emit (OpCodes
.Initobj
, type
);
5586 ig
.Emit (OpCodes
.Box
, type
);
5587 ig
.Emit (OpCodes
.Brfalse
, label_activator
);
5589 temp
.AddressOf (ec
, AddressOp
.Store
);
5590 ig
.Emit (OpCodes
.Initobj
, type
);
5592 ig
.Emit (OpCodes
.Br_S
, label_end
);
5594 ig
.MarkLabel (label_activator
);
5596 ig
.Emit (OpCodes
.Call
, ci
);
5597 ig
.MarkLabel (label_end
);
5602 // This Emit can be invoked in two contexts:
5603 // * As a mechanism that will leave a value on the stack (new object)
5604 // * As one that wont (init struct)
5606 // If we are dealing with a ValueType, we have a few
5607 // situations to deal with:
5609 // * The target is a ValueType, and we have been provided
5610 // the instance (this is easy, we are being assigned).
5612 // * The target of New is being passed as an argument,
5613 // to a boxing operation or a function that takes a
5616 // In this case, we need to create a temporary variable
5617 // that is the argument of New.
5619 // Returns whether a value is left on the stack
5621 // *** Implementation note ***
5623 // To benefit from this optimization, each assignable expression
5624 // has to manually cast to New and call this Emit.
5626 // TODO: It's worth to implement it for arrays and fields
5628 public virtual bool Emit (EmitContext ec
, IMemoryLocation target
)
5630 bool is_value_type
= TypeManager
.IsValueType (type
);
5631 ILGenerator ig
= ec
.ig
;
5632 VariableReference vr
= target
as VariableReference
;
5634 if (target
!= null && is_value_type
&& (vr
!= null || method
== null)) {
5635 target
.AddressOf (ec
, AddressOp
.Store
);
5636 } else if (vr
!= null && vr
.IsRef
) {
5640 if (Arguments
!= null)
5641 Arguments
.Emit (ec
);
5643 if (is_value_type
) {
5644 if (method
== null) {
5645 ig
.Emit (OpCodes
.Initobj
, type
);
5650 ig
.Emit (OpCodes
.Call
, (ConstructorInfo
) method
.BestCandidate
.MetaInfo
);
5655 if (is_type_parameter
)
5656 return DoEmitTypeParameter (ec
);
5658 ConstructorInfo ci
= (ConstructorInfo
) method
.BestCandidate
.MetaInfo
;
5660 if (TypeManager
.IsGenericType (type
) && type
.IsGenericTypeDefinition
)
5661 ci
= TypeBuilder
.GetConstructor (type
, ci
);
5664 ig
.Emit (OpCodes
.Newobj
, ci
);
5668 public override void Emit (EmitContext ec
)
5670 LocalTemporary v
= null;
5671 if (method
== null && TypeManager
.IsValueType (type
)) {
5672 // TODO: Use temporary variable from pool
5673 v
= new LocalTemporary (type
);
5680 public override void EmitStatement (EmitContext ec
)
5682 LocalTemporary v
= null;
5683 if (method
== null && TypeManager
.IsValueType (type
)) {
5684 // TODO: Use temporary variable from pool
5685 v
= new LocalTemporary (type
);
5689 ec
.ig
.Emit (OpCodes
.Pop
);
5692 public virtual bool HasInitializer
{
5698 public void AddressOf (EmitContext ec
, AddressOp mode
)
5700 EmitAddressOf (ec
, mode
);
5703 protected virtual IMemoryLocation
EmitAddressOf (EmitContext ec
, AddressOp mode
)
5705 LocalTemporary value_target
= new LocalTemporary (type
);
5707 if (is_type_parameter
) {
5708 DoEmitTypeParameter (ec
);
5709 value_target
.Store (ec
);
5710 value_target
.AddressOf (ec
, mode
);
5711 return value_target
;
5714 if (!TypeManager
.IsStruct (type
)){
5716 // We throw an exception. So far, I believe we only need to support
5718 // foreach (int j in new StructType ())
5721 throw new Exception ("AddressOf should not be used for classes");
5724 value_target
.AddressOf (ec
, AddressOp
.Store
);
5726 if (method
== null) {
5727 ec
.ig
.Emit (OpCodes
.Initobj
, type
);
5729 if (Arguments
!= null)
5730 Arguments
.Emit (ec
);
5732 ec
.ig
.Emit (OpCodes
.Call
, (ConstructorInfo
) method
.BestCandidate
.MetaInfo
);
5735 value_target
.AddressOf (ec
, mode
);
5736 return value_target
;
5739 protected override void CloneTo (CloneContext clonectx
, Expression t
)
5741 New target
= (New
) t
;
5743 target
.RequestedType
= RequestedType
.Clone (clonectx
);
5744 if (Arguments
!= null){
5745 target
.Arguments
= Arguments
.Clone (clonectx
);
5749 public override SLE
.Expression
MakeExpression (BuilderContext ctx
)
5751 return SLE
.Expression
.New ((ConstructorInfo
) method
.BestCandidate
.MetaInfo
, Arguments
.MakeExpression (Arguments
, ctx
));
5754 public override void MutateHoistedGenericType (AnonymousMethodStorey storey
)
5756 if (method
!= null) {
5757 method
.MutateHoistedGenericType (storey
);
5758 if (Arguments
!= null) {
5759 Arguments
.MutateHoistedGenericType (storey
);
5763 type
= storey
.MutateType (type
);
5767 public class ArrayInitializer
: ShimExpression
5769 List
<Expression
> elements
;
5771 public ArrayInitializer (List
<Expression
> init
, Location loc
)
5777 public ArrayInitializer (int count
, Location loc
)
5780 elements
= new List
<Expression
> (count
);
5783 public ArrayInitializer (Location loc
)
5788 public void Add (Expression expr
)
5790 elements
.Add (expr
);
5793 protected override void CloneTo (CloneContext clonectx
, Expression t
)
5795 var target
= (ArrayInitializer
) t
;
5797 target
.elements
= new List
<Expression
> (elements
.Count
);
5798 foreach (var element
in elements
)
5799 target
.elements
.Add (element
.Clone (clonectx
));
5801 base.CloneTo (clonectx
, t
);
5805 get { return elements.Count; }
5808 protected override Expression
DoResolve (ResolveContext rc
)
5810 throw new NotImplementedException ();
5813 public Expression
this [int index
] {
5814 get { return elements [index]; }
5819 /// 14.5.10.2: Represents an array creation expression.
5823 /// There are two possible scenarios here: one is an array creation
5824 /// expression that specifies the dimensions and optionally the
5825 /// initialization data and the other which does not need dimensions
5826 /// specified but where initialization data is mandatory.
5828 class ArrayCreation
: Expression
5830 FullNamedExpression requested_base_type
;
5831 ArrayInitializer initializers
;
5834 // The list of Argument types.
5835 // This is used to construct the `newarray' or constructor signature
5837 protected List
<Expression
> arguments
;
5839 protected Type array_element_type
;
5840 bool expect_initializers
= false;
5841 int num_arguments
= 0;
5842 protected int dimensions
;
5843 protected readonly string rank
;
5844 Expression first_emit
;
5845 LocalTemporary first_emit_temp
;
5847 protected List
<Expression
> array_data
;
5849 Dictionary
<int, int> bounds
;
5851 // The number of constants in array initializers
5852 int const_initializers_count
;
5853 bool only_constant_initializers
;
5855 public ArrayCreation (FullNamedExpression requested_base_type
, List
<Expression
> exprs
, string rank
, ArrayInitializer initializers
, Location l
)
5857 this.requested_base_type
= requested_base_type
;
5858 this.initializers
= initializers
;
5862 arguments
= new List
<Expression
> (exprs
);
5863 num_arguments
= arguments
.Count
;
5866 public ArrayCreation (FullNamedExpression requested_base_type
, string rank
, ArrayInitializer initializers
, Location l
)
5868 this.requested_base_type
= requested_base_type
;
5869 this.initializers
= initializers
;
5873 //this.rank = rank.Substring (0, rank.LastIndexOf ('['));
5875 //string tmp = rank.Substring (rank.LastIndexOf ('['));
5877 //dimensions = tmp.Length - 1;
5878 expect_initializers
= true;
5881 protected override void Error_NegativeArrayIndex (ResolveContext ec
, Location loc
)
5883 ec
.Report
.Error (248, loc
, "Cannot create an array with a negative size");
5886 bool CheckIndices (ResolveContext ec
, ArrayInitializer probe
, int idx
, bool specified_dims
, int child_bounds
)
5888 if (specified_dims
) {
5889 Expression a
= arguments
[idx
];
5894 Constant c
= a
as Constant
;
5896 c
= c
.ImplicitConversionRequired (ec
, TypeManager
.int32_type
, a
.Location
);
5900 ec
.Report
.Error (150, a
.Location
, "A constant value is expected");
5904 int value = (int) c
.GetValue ();
5906 if (value != probe
.Count
) {
5907 ec
.Report
.Error (847, loc
, "An array initializer of length `{0}' was expected", value);
5911 bounds
[idx
] = value;
5914 only_constant_initializers
= true;
5915 for (int i
= 0; i
< probe
.Count
; ++i
) {
5917 if (o
is ArrayInitializer
) {
5918 var sub_probe
= o
as ArrayInitializer
;
5919 if (idx
+ 1 >= dimensions
){
5920 ec
.Report
.Error (623, loc
, "Array initializers can only be used in a variable or field initializer. Try using a new expression instead");
5924 bool ret
= CheckIndices (ec
, sub_probe
, idx
+ 1, specified_dims
, child_bounds
- 1);
5927 } else if (child_bounds
> 1) {
5928 ec
.Report
.Error (846, o
.Location
, "A nested array initializer was expected");
5930 Expression element
= ResolveArrayElement (ec
, o
);
5931 if (element
== null)
5934 // Initializers with the default values can be ignored
5935 Constant c
= element
as Constant
;
5937 if (c
.IsDefaultInitializer (array_element_type
)) {
5941 ++const_initializers_count
;
5944 only_constant_initializers
= false;
5947 array_data
.Add (element
);
5954 public override Expression
CreateExpressionTree (ResolveContext ec
)
5958 if (array_data
== null) {
5959 args
= new Arguments (arguments
.Count
+ 1);
5960 args
.Add (new Argument (new TypeOf (new TypeExpression (array_element_type
, loc
), loc
)));
5961 foreach (Expression a
in arguments
)
5962 args
.Add (new Argument (a
.CreateExpressionTree (ec
)));
5964 return CreateExpressionFactoryCall (ec
, "NewArrayBounds", args
);
5967 if (dimensions
> 1) {
5968 ec
.Report
.Error (838, loc
, "An expression tree cannot contain a multidimensional array initializer");
5972 args
= new Arguments (array_data
== null ? 1 : array_data
.Count
+ 1);
5973 args
.Add (new Argument (new TypeOf (new TypeExpression (array_element_type
, loc
), loc
)));
5974 if (array_data
!= null) {
5975 for (int i
= 0; i
< array_data
.Count
; ++i
) {
5976 Expression e
= array_data
[i
];
5978 e
= Convert
.ImplicitConversion (ec
, initializers
[i
], array_element_type
, loc
);
5980 args
.Add (new Argument (e
.CreateExpressionTree (ec
)));
5984 return CreateExpressionFactoryCall (ec
, "NewArrayInit", args
);
5987 public void UpdateIndices ()
5990 for (var probe
= initializers
; probe
!= null;) {
5991 if (probe
.Count
> 0 && probe
[0] is ArrayInitializer
) {
5992 Expression e
= new IntConstant (probe
.Count
, Location
.Null
);
5995 bounds
[i
++] = probe
.Count
;
5997 probe
= (ArrayInitializer
) probe
[0];
6000 Expression e
= new IntConstant (probe
.Count
, Location
.Null
);
6003 bounds
[i
++] = probe
.Count
;
6009 protected virtual Expression
ResolveArrayElement (ResolveContext ec
, Expression element
)
6011 element
= element
.Resolve (ec
);
6012 if (element
== null)
6015 if (element
is CompoundAssign
.TargetExpression
) {
6016 if (first_emit
!= null)
6017 throw new InternalErrorException ("Can only handle one mutator at a time");
6018 first_emit
= element
;
6019 element
= first_emit_temp
= new LocalTemporary (element
.Type
);
6022 return Convert
.ImplicitConversionRequired (
6023 ec
, element
, array_element_type
, loc
);
6026 protected bool ResolveInitializers (ResolveContext ec
)
6028 if (initializers
== null) {
6029 return !expect_initializers
;
6033 // We use this to store all the date values in the order in which we
6034 // will need to store them in the byte blob later
6036 array_data
= new List
<Expression
> ();
6037 bounds
= new Dictionary
<int, int> ();
6039 if (arguments
!= null)
6040 return CheckIndices (ec
, initializers
, 0, true, dimensions
);
6042 arguments
= new List
<Expression
> ();
6044 if (!CheckIndices (ec
, initializers
, 0, false, dimensions
))
6053 // Resolved the type of the array
6055 bool ResolveArrayType (ResolveContext ec
)
6057 if (requested_base_type
is VarExpr
) {
6058 ec
.Report
.Error (820, loc
, "An implicitly typed local variable declarator cannot use an array initializer");
6062 StringBuilder array_qualifier
= new StringBuilder (rank
);
6065 // `In the first form allocates an array instace of the type that results
6066 // from deleting each of the individual expression from the expression list'
6068 if (num_arguments
> 0) {
6069 array_qualifier
.Append ("[");
6070 for (int i
= num_arguments
-1; i
> 0; i
--)
6071 array_qualifier
.Append (",");
6072 array_qualifier
.Append ("]");
6078 TypeExpr array_type_expr
;
6079 array_type_expr
= new ComposedCast (requested_base_type
, array_qualifier
.ToString (), loc
);
6080 array_type_expr
= array_type_expr
.ResolveAsTypeTerminal (ec
, false);
6081 if (array_type_expr
== null)
6084 type
= array_type_expr
.Type
;
6085 if (!type
.IsArray
) {
6086 ec
.Report
.Error (622, loc
, "Can only use array initializer expressions to assign to array types. Try using a new expression instead");
6090 array_element_type
= TypeManager
.GetElementType (type
);
6091 dimensions
= type
.GetArrayRank ();
6096 protected override Expression
DoResolve (ResolveContext ec
)
6101 if (!ResolveArrayType (ec
))
6105 // First step is to validate the initializers and fill
6106 // in any missing bits
6108 if (!ResolveInitializers (ec
))
6111 for (int i
= 0; i
< arguments
.Count
; ++i
) {
6112 Expression e
= arguments
[i
].Resolve (ec
);
6116 arguments
[i
] = ConvertExpressionToArrayIndex (ec
, e
);
6119 eclass
= ExprClass
.Value
;
6123 MethodInfo
GetArrayMethod (EmitContext ec
, int arguments
)
6125 ModuleBuilder mb
= RootContext
.ToplevelTypes
.Builder
;
6127 Type
[] arg_types
= new Type
[arguments
];
6128 for (int i
= 0; i
< arguments
; i
++)
6129 arg_types
[i
] = TypeManager
.int32_type
;
6131 MethodInfo mi
= mb
.GetArrayMethod (type
, ".ctor", CallingConventions
.HasThis
, null,
6135 ec
.Report
.Error (-6, "New invocation: Can not find a constructor for " +
6136 "this argument list");
6143 byte [] MakeByteBlob ()
6148 int count
= array_data
.Count
;
6150 Type element_type
= array_element_type
;
6151 if (TypeManager
.IsEnumType (element_type
))
6152 element_type
= TypeManager
.GetEnumUnderlyingType (element_type
);
6154 factor
= GetTypeSize (element_type
);
6156 throw new Exception ("unrecognized type in MakeByteBlob: " + element_type
);
6158 data
= new byte [(count
* factor
+ 3) & ~
3];
6161 for (int i
= 0; i
< count
; ++i
) {
6162 object v
= array_data
[i
];
6164 if (v
is EnumConstant
)
6165 v
= ((EnumConstant
) v
).Child
;
6167 if (v
is Constant
&& !(v
is StringConstant
))
6168 v
= ((Constant
) v
).GetValue ();
6174 if (element_type
== TypeManager
.int64_type
){
6175 if (!(v
is Expression
)){
6176 long val
= (long) v
;
6178 for (int j
= 0; j
< factor
; ++j
) {
6179 data
[idx
+ j
] = (byte) (val
& 0xFF);
6183 } else if (element_type
== TypeManager
.uint64_type
){
6184 if (!(v
is Expression
)){
6185 ulong val
= (ulong) v
;
6187 for (int j
= 0; j
< factor
; ++j
) {
6188 data
[idx
+ j
] = (byte) (val
& 0xFF);
6192 } else if (element_type
== TypeManager
.float_type
) {
6193 if (!(v
is Expression
)){
6194 element
= BitConverter
.GetBytes ((float) v
);
6196 for (int j
= 0; j
< factor
; ++j
)
6197 data
[idx
+ j
] = element
[j
];
6198 if (!BitConverter
.IsLittleEndian
)
6199 System
.Array
.Reverse (data
, idx
, 4);
6201 } else if (element_type
== TypeManager
.double_type
) {
6202 if (!(v
is Expression
)){
6203 element
= BitConverter
.GetBytes ((double) v
);
6205 for (int j
= 0; j
< factor
; ++j
)
6206 data
[idx
+ j
] = element
[j
];
6208 // FIXME: Handle the ARM float format.
6209 if (!BitConverter
.IsLittleEndian
)
6210 System
.Array
.Reverse (data
, idx
, 8);
6212 } else if (element_type
== TypeManager
.char_type
){
6213 if (!(v
is Expression
)){
6214 int val
= (int) ((char) v
);
6216 data
[idx
] = (byte) (val
& 0xff);
6217 data
[idx
+1] = (byte) (val
>> 8);
6219 } else if (element_type
== TypeManager
.short_type
){
6220 if (!(v
is Expression
)){
6221 int val
= (int) ((short) v
);
6223 data
[idx
] = (byte) (val
& 0xff);
6224 data
[idx
+1] = (byte) (val
>> 8);
6226 } else if (element_type
== TypeManager
.ushort_type
){
6227 if (!(v
is Expression
)){
6228 int val
= (int) ((ushort) v
);
6230 data
[idx
] = (byte) (val
& 0xff);
6231 data
[idx
+1] = (byte) (val
>> 8);
6233 } else if (element_type
== TypeManager
.int32_type
) {
6234 if (!(v
is Expression
)){
6237 data
[idx
] = (byte) (val
& 0xff);
6238 data
[idx
+1] = (byte) ((val
>> 8) & 0xff);
6239 data
[idx
+2] = (byte) ((val
>> 16) & 0xff);
6240 data
[idx
+3] = (byte) (val
>> 24);
6242 } else if (element_type
== TypeManager
.uint32_type
) {
6243 if (!(v
is Expression
)){
6244 uint val
= (uint) v
;
6246 data
[idx
] = (byte) (val
& 0xff);
6247 data
[idx
+1] = (byte) ((val
>> 8) & 0xff);
6248 data
[idx
+2] = (byte) ((val
>> 16) & 0xff);
6249 data
[idx
+3] = (byte) (val
>> 24);
6251 } else if (element_type
== TypeManager
.sbyte_type
) {
6252 if (!(v
is Expression
)){
6253 sbyte val
= (sbyte) v
;
6254 data
[idx
] = (byte) val
;
6256 } else if (element_type
== TypeManager
.byte_type
) {
6257 if (!(v
is Expression
)){
6258 byte val
= (byte) v
;
6259 data
[idx
] = (byte) val
;
6261 } else if (element_type
== TypeManager
.bool_type
) {
6262 if (!(v
is Expression
)){
6263 bool val
= (bool) v
;
6264 data
[idx
] = (byte) (val
? 1 : 0);
6266 } else if (element_type
== TypeManager
.decimal_type
){
6267 if (!(v
is Expression
)){
6268 int [] bits
= Decimal
.GetBits ((decimal) v
);
6271 // FIXME: For some reason, this doesn't work on the MS runtime.
6272 int [] nbits
= new int [4];
6273 nbits
[0] = bits
[3];
6274 nbits
[1] = bits
[2];
6275 nbits
[2] = bits
[0];
6276 nbits
[3] = bits
[1];
6278 for (int j
= 0; j
< 4; j
++){
6279 data
[p
++] = (byte) (nbits
[j
] & 0xff);
6280 data
[p
++] = (byte) ((nbits
[j
] >> 8) & 0xff);
6281 data
[p
++] = (byte) ((nbits
[j
] >> 16) & 0xff);
6282 data
[p
++] = (byte) (nbits
[j
] >> 24);
6286 throw new Exception ("Unrecognized type in MakeByteBlob: " + element_type
);
6296 public override SLE
.Expression
MakeExpression (BuilderContext ctx
)
6298 var initializers
= new SLE
.Expression
[array_data
.Count
];
6299 for (var i
= 0; i
< initializers
.Length
; i
++) {
6300 if (array_data
[i
] == null)
6301 initializers
[i
] = SLE
.Expression
.Default (array_element_type
);
6303 initializers
[i
] = array_data
[i
].MakeExpression (ctx
);
6306 return SLE
.Expression
.NewArrayInit (array_element_type
, initializers
);
6310 public override void MutateHoistedGenericType (AnonymousMethodStorey storey
)
6312 array_element_type
= storey
.MutateType (array_element_type
);
6313 type
= storey
.MutateType (type
);
6314 if (arguments
!= null) {
6315 foreach (Expression e
in arguments
)
6316 e
.MutateHoistedGenericType (storey
);
6319 if (array_data
!= null) {
6320 foreach (Expression e
in array_data
) {
6321 // Don't mutate values optimized away
6325 e
.MutateHoistedGenericType (storey
);
6331 // Emits the initializers for the array
6333 void EmitStaticInitializers (EmitContext ec
)
6335 // FIXME: This should go to Resolve !
6336 if (TypeManager
.void_initializearray_array_fieldhandle
== null) {
6337 TypeManager
.void_initializearray_array_fieldhandle
= TypeManager
.GetPredefinedMethod (
6338 TypeManager
.runtime_helpers_type
, "InitializeArray", loc
,
6339 TypeManager
.array_type
, TypeManager
.runtime_field_handle_type
);
6340 if (TypeManager
.void_initializearray_array_fieldhandle
== null)
6345 // First, the static data
6348 ILGenerator ig
= ec
.ig
;
6350 byte [] data
= MakeByteBlob ();
6352 fb
= RootContext
.MakeStaticData (data
);
6354 ig
.Emit (OpCodes
.Dup
);
6355 ig
.Emit (OpCodes
.Ldtoken
, fb
);
6356 ig
.Emit (OpCodes
.Call
, (MethodInfo
) TypeManager
.void_initializearray_array_fieldhandle
.MetaInfo
);
6360 // Emits pieces of the array that can not be computed at compile
6361 // time (variables and string locations).
6363 // This always expect the top value on the stack to be the array
6365 void EmitDynamicInitializers (EmitContext ec
, bool emitConstants
)
6367 ILGenerator ig
= ec
.ig
;
6368 int dims
= bounds
.Count
;
6369 int [] current_pos
= new int [dims
];
6371 MethodInfo
set = null;
6374 Type
[] args
= new Type
[dims
+ 1];
6376 for (int j
= 0; j
< dims
; j
++)
6377 args
[j
] = TypeManager
.int32_type
;
6378 args
[dims
] = array_element_type
;
6380 set = RootContext
.ToplevelTypes
.Builder
.GetArrayMethod (
6382 CallingConventions
.HasThis
| CallingConventions
.Standard
,
6383 TypeManager
.void_type
, args
);
6386 for (int i
= 0; i
< array_data
.Count
; i
++){
6388 Expression e
= array_data
[i
];
6390 // Constant can be initialized via StaticInitializer
6391 if (e
!= null && !(!emitConstants
&& e
is Constant
)) {
6392 Type etype
= e
.Type
;
6394 ig
.Emit (OpCodes
.Dup
);
6396 for (int idx
= 0; idx
< dims
; idx
++)
6397 IntConstant
.EmitInt (ig
, current_pos
[idx
]);
6400 // If we are dealing with a struct, get the
6401 // address of it, so we can store it.
6403 if ((dims
== 1) && TypeManager
.IsStruct (etype
) &&
6404 (!TypeManager
.IsBuiltinOrEnum (etype
) ||
6405 etype
== TypeManager
.decimal_type
)) {
6407 ig
.Emit (OpCodes
.Ldelema
, etype
);
6413 bool is_stobj
, has_type_arg
;
6414 OpCode op
= ArrayAccess
.GetStoreOpcode (etype
, out is_stobj
, out has_type_arg
);
6416 ig
.Emit (OpCodes
.Stobj
, etype
);
6417 else if (has_type_arg
)
6418 ig
.Emit (op
, etype
);
6422 ig
.Emit (OpCodes
.Call
, set);
6429 for (int j
= dims
- 1; j
>= 0; j
--){
6431 if (current_pos
[j
] < bounds
[j
])
6433 current_pos
[j
] = 0;
6438 public override void Emit (EmitContext ec
)
6440 ILGenerator ig
= ec
.ig
;
6442 if (first_emit
!= null) {
6443 first_emit
.Emit (ec
);
6444 first_emit_temp
.Store (ec
);
6447 foreach (Expression e
in arguments
)
6450 if (arguments
.Count
== 1)
6451 ig
.Emit (OpCodes
.Newarr
, TypeManager
.TypeToReflectionType (array_element_type
));
6453 ig
.Emit (OpCodes
.Newobj
, GetArrayMethod (ec
, arguments
.Count
));
6456 if (initializers
== null)
6459 // Emit static initializer for arrays which have contain more than 2 items and
6460 // the static initializer will initialize at least 25% of array values.
6461 // NOTE: const_initializers_count does not contain default constant values.
6462 if (const_initializers_count
> 2 && const_initializers_count
* 4 > (array_data
.Count
) &&
6463 (TypeManager
.IsPrimitiveType (array_element_type
) || TypeManager
.IsEnumType (array_element_type
))) {
6464 EmitStaticInitializers (ec
);
6466 if (!only_constant_initializers
)
6467 EmitDynamicInitializers (ec
, false);
6469 EmitDynamicInitializers (ec
, true);
6472 if (first_emit_temp
!= null)
6473 first_emit_temp
.Release (ec
);
6476 public override bool GetAttributableValue (ResolveContext ec
, Type value_type
, out object value)
6478 if (arguments
.Count
!= 1) {
6479 // ec.Report.Error (-211, Location, "attribute can not encode multi-dimensional arrays");
6480 return base.GetAttributableValue (ec
, null, out value);
6483 if (array_data
== null) {
6484 Expression arg
= arguments
[0];
6486 if (arg
.GetAttributableValue (ec
, arg
.Type
, out arg_value
) && arg_value
is int && (int)arg_value
== 0) {
6487 value = Array
.CreateInstance (array_element_type
, 0);
6491 // ec.Report.Error (-212, Location, "array should be initialized when passing it to an attribute");
6492 return base.GetAttributableValue (ec
, null, out value);
6495 Array ret
= Array
.CreateInstance (array_element_type
, array_data
.Count
);
6496 object element_value
;
6497 for (int i
= 0; i
< ret
.Length
; ++i
)
6499 Expression e
= array_data
[i
];
6501 // Is null when an initializer is optimized (value == predefined value)
6505 if (!e
.GetAttributableValue (ec
, array_element_type
, out element_value
)) {
6509 ret
.SetValue (element_value
, i
);
6515 protected override void CloneTo (CloneContext clonectx
, Expression t
)
6517 ArrayCreation target
= (ArrayCreation
) t
;
6519 if (requested_base_type
!= null)
6520 target
.requested_base_type
= (FullNamedExpression
)requested_base_type
.Clone (clonectx
);
6522 if (arguments
!= null){
6523 target
.arguments
= new List
<Expression
> (arguments
.Count
);
6524 foreach (Expression e
in arguments
)
6525 target
.arguments
.Add (e
.Clone (clonectx
));
6528 if (initializers
!= null)
6529 target
.initializers
= (ArrayInitializer
) initializers
.Clone (clonectx
);
6534 // Represents an implicitly typed array epxression
6536 class ImplicitlyTypedArrayCreation
: ArrayCreation
6538 public ImplicitlyTypedArrayCreation (string rank
, ArrayInitializer initializers
, Location loc
)
6539 : base (null, rank
, initializers
, loc
)
6541 if (rank
.Length
> 2) {
6542 while (rank
[++dimensions
] == ',');
6548 protected override Expression
DoResolve (ResolveContext ec
)
6553 if (!ResolveInitializers (ec
))
6556 if (array_element_type
== null || array_element_type
== TypeManager
.null_type
||
6557 array_element_type
== TypeManager
.void_type
|| array_element_type
== InternalType
.AnonymousMethod
||
6558 array_element_type
== InternalType
.MethodGroup
||
6559 arguments
.Count
!= dimensions
) {
6560 Error_NoBestType (ec
);
6565 // At this point we found common base type for all initializer elements
6566 // but we have to be sure that all static initializer elements are of
6569 UnifyInitializerElement (ec
);
6571 type
= TypeManager
.GetConstructedType (array_element_type
, rank
);
6572 eclass
= ExprClass
.Value
;
6576 void Error_NoBestType (ResolveContext ec
)
6578 ec
.Report
.Error (826, loc
,
6579 "The type of an implicitly typed array cannot be inferred from the initializer. Try specifying array type explicitly");
6583 // Converts static initializer only
6585 void UnifyInitializerElement (ResolveContext ec
)
6587 for (int i
= 0; i
< array_data
.Count
; ++i
) {
6588 Expression e
= (Expression
)array_data
[i
];
6590 array_data
[i
] = Convert
.ImplicitConversion (ec
, e
, array_element_type
, Location
.Null
);
6594 protected override Expression
ResolveArrayElement (ResolveContext ec
, Expression element
)
6596 element
= element
.Resolve (ec
);
6597 if (element
== null)
6600 if (array_element_type
== null) {
6601 if (element
.Type
!= TypeManager
.null_type
)
6602 array_element_type
= element
.Type
;
6607 if (Convert
.ImplicitConversionExists (ec
, element
, array_element_type
)) {
6611 if (Convert
.ImplicitConversionExists (ec
, new TypeExpression (array_element_type
, loc
), element
.Type
)) {
6612 array_element_type
= element
.Type
;
6616 Error_NoBestType (ec
);
6621 public sealed class CompilerGeneratedThis
: This
6623 public static This Instance
= new CompilerGeneratedThis ();
6625 private CompilerGeneratedThis ()
6626 : base (Location
.Null
)
6630 public CompilerGeneratedThis (Type type
, Location loc
)
6636 protected override Expression
DoResolve (ResolveContext ec
)
6638 eclass
= ExprClass
.Variable
;
6640 type
= ec
.CurrentType
;
6642 is_struct
= type
.IsValueType
;
6646 public override HoistedVariable
GetHoistedVariable (AnonymousExpression ae
)
6653 /// Represents the `this' construct
6656 public class This
: VariableReference
6658 sealed class ThisVariable
: ILocalVariable
6660 public static readonly ILocalVariable Instance
= new ThisVariable ();
6662 public void Emit (EmitContext ec
)
6664 ec
.ig
.Emit (OpCodes
.Ldarg_0
);
6667 public void EmitAssign (EmitContext ec
)
6669 throw new InvalidOperationException ();
6672 public void EmitAddressOf (EmitContext ec
)
6674 ec
.ig
.Emit (OpCodes
.Ldarg_0
);
6679 VariableInfo variable_info
;
6680 protected bool is_struct
;
6682 public This (Block block
, Location loc
)
6688 public This (Location loc
)
6693 public override VariableInfo VariableInfo
{
6694 get { return variable_info; }
6697 public override bool IsFixed
{
6698 get { return false; }
6701 public override HoistedVariable
GetHoistedVariable (AnonymousExpression ae
)
6706 AnonymousMethodStorey storey
= ae
.Storey
;
6707 while (storey
!= null) {
6708 AnonymousMethodStorey temp
= storey
.Parent
as AnonymousMethodStorey
;
6710 return storey
.HoistedThis
;
6718 public override bool IsRef
{
6719 get { return is_struct; }
6722 protected override ILocalVariable Variable
{
6723 get { return ThisVariable.Instance; }
6726 public static bool IsThisAvailable (ResolveContext ec
)
6728 if (ec
.IsStatic
|| ec
.HasAny (ResolveContext
.Options
.FieldInitializerScope
| ResolveContext
.Options
.BaseInitializer
| ResolveContext
.Options
.ConstantScope
))
6731 if (ec
.CurrentAnonymousMethod
== null)
6734 if (ec
.CurrentType
.IsValueType
&& ec
.CurrentIterator
== null)
6740 public bool ResolveBase (ResolveContext ec
)
6742 eclass
= ExprClass
.Variable
;
6743 type
= ec
.CurrentType
;
6745 if (!IsThisAvailable (ec
)) {
6746 if (ec
.IsStatic
&& !ec
.HasSet (ResolveContext
.Options
.ConstantScope
)) {
6747 ec
.Report
.Error (26, loc
, "Keyword `this' is not valid in a static property, static method, or static field initializer");
6748 } else if (ec
.CurrentAnonymousMethod
!= null) {
6749 ec
.Report
.Error (1673, loc
,
6750 "Anonymous methods inside structs cannot access instance members of `this'. " +
6751 "Consider copying `this' to a local variable outside the anonymous method and using the local instead");
6753 ec
.Report
.Error (27, loc
, "Keyword `this' is not available in the current context");
6757 is_struct
= type
.IsValueType
;
6759 if (block
!= null) {
6760 if (block
.Toplevel
.ThisVariable
!= null)
6761 variable_info
= block
.Toplevel
.ThisVariable
.VariableInfo
;
6763 AnonymousExpression am
= ec
.CurrentAnonymousMethod
;
6764 if (am
!= null && ec
.IsVariableCapturingRequired
) {
6765 am
.SetHasThisAccess ();
6773 // Called from Invocation to check if the invocation is correct
6775 public override void CheckMarshalByRefAccess (ResolveContext ec
)
6777 if ((variable_info
!= null) && !(TypeManager
.IsStruct (type
) && ec
.OmitStructFlowAnalysis
) &&
6778 !variable_info
.IsAssigned (ec
)) {
6779 ec
.Report
.Error (188, loc
,
6780 "The `this' object cannot be used before all of its fields are assigned to");
6781 variable_info
.SetAssigned (ec
);
6785 public override Expression
CreateExpressionTree (ResolveContext ec
)
6787 Arguments args
= new Arguments (1);
6788 args
.Add (new Argument (this));
6790 // Use typeless constant for ldarg.0 to save some
6791 // space and avoid problems with anonymous stories
6792 return CreateExpressionFactoryCall (ec
, "Constant", args
);
6795 protected override Expression
DoResolve (ResolveContext ec
)
6801 override public Expression
DoResolveLValue (ResolveContext ec
, Expression right_side
)
6803 if (!ResolveBase (ec
))
6806 if (variable_info
!= null)
6807 variable_info
.SetAssigned (ec
);
6809 if (ec
.CurrentType
.IsClass
){
6810 if (right_side
== EmptyExpression
.UnaryAddress
)
6811 ec
.Report
.Error (459, loc
, "Cannot take the address of `this' because it is read-only");
6812 else if (right_side
== EmptyExpression
.OutAccess
.Instance
)
6813 ec
.Report
.Error (1605, loc
, "Cannot pass `this' as a ref or out argument because it is read-only");
6815 ec
.Report
.Error (1604, loc
, "Cannot assign to `this' because it is read-only");
6821 public override int GetHashCode()
6823 return block
.GetHashCode ();
6826 public override string Name
{
6827 get { return "this"; }
6830 public override bool Equals (object obj
)
6832 This t
= obj
as This
;
6836 return block
== t
.block
;
6839 protected override void CloneTo (CloneContext clonectx
, Expression t
)
6841 This target
= (This
) t
;
6843 target
.block
= clonectx
.LookupBlock (block
);
6846 public override void SetHasAddressTaken ()
6853 /// Represents the `__arglist' construct
6855 public class ArglistAccess
: Expression
6857 public ArglistAccess (Location loc
)
6862 public override Expression
CreateExpressionTree (ResolveContext ec
)
6864 throw new NotSupportedException ("ET");
6867 protected override Expression
DoResolve (ResolveContext ec
)
6869 eclass
= ExprClass
.Variable
;
6870 type
= TypeManager
.runtime_argument_handle_type
;
6872 if (ec
.HasSet (ResolveContext
.Options
.FieldInitializerScope
) || !ec
.CurrentBlock
.Toplevel
.Parameters
.HasArglist
) {
6873 ec
.Report
.Error (190, loc
,
6874 "The __arglist construct is valid only within a variable argument method");
6880 public override void Emit (EmitContext ec
)
6882 ec
.ig
.Emit (OpCodes
.Arglist
);
6885 protected override void CloneTo (CloneContext clonectx
, Expression target
)
6892 /// Represents the `__arglist (....)' construct
6894 class Arglist
: Expression
6896 Arguments Arguments
;
6898 public Arglist (Location loc
)
6903 public Arglist (Arguments args
, Location l
)
6909 public Type
[] ArgumentTypes
{
6911 if (Arguments
== null)
6912 return Type
.EmptyTypes
;
6914 Type
[] retval
= new Type
[Arguments
.Count
];
6915 for (int i
= 0; i
< retval
.Length
; i
++)
6916 retval
[i
] = Arguments
[i
].Expr
.Type
;
6922 public override Expression
CreateExpressionTree (ResolveContext ec
)
6924 ec
.Report
.Error (1952, loc
, "An expression tree cannot contain a method with variable arguments");
6928 protected override Expression
DoResolve (ResolveContext ec
)
6930 eclass
= ExprClass
.Variable
;
6931 type
= InternalType
.Arglist
;
6932 if (Arguments
!= null) {
6933 bool dynamic; // Can be ignored as there is always only 1 overload
6934 Arguments
.Resolve (ec
, out dynamic);
6940 public override void Emit (EmitContext ec
)
6942 if (Arguments
!= null)
6943 Arguments
.Emit (ec
);
6946 public override void MutateHoistedGenericType (AnonymousMethodStorey storey
)
6948 if (Arguments
!= null)
6949 Arguments
.MutateHoistedGenericType (storey
);
6952 protected override void CloneTo (CloneContext clonectx
, Expression t
)
6954 Arglist target
= (Arglist
) t
;
6956 if (Arguments
!= null)
6957 target
.Arguments
= Arguments
.Clone (clonectx
);
6962 /// Implements the typeof operator
6964 public class TypeOf
: Expression
{
6965 Expression QueriedType
;
6966 protected Type typearg
;
6968 public TypeOf (Expression queried_type
, Location l
)
6970 QueriedType
= queried_type
;
6974 public override Expression
CreateExpressionTree (ResolveContext ec
)
6976 Arguments args
= new Arguments (2);
6977 args
.Add (new Argument (this));
6978 args
.Add (new Argument (new TypeOf (new TypeExpression (type
, loc
), loc
)));
6979 return CreateExpressionFactoryCall (ec
, "Constant", args
);
6982 protected override Expression
DoResolve (ResolveContext ec
)
6984 TypeExpr texpr
= QueriedType
.ResolveAsTypeTerminal (ec
, false);
6988 typearg
= texpr
.Type
;
6990 if (typearg
== TypeManager
.void_type
) {
6991 ec
.Report
.Error (673, loc
, "System.Void cannot be used from C#. Use typeof (void) to get the void type object");
6992 } else if (typearg
.IsPointer
&& !ec
.IsUnsafe
){
6993 UnsafeError (ec
, loc
);
6994 } else if (texpr
is DynamicTypeExpr
) {
6995 ec
.Report
.Error (1962, QueriedType
.Location
,
6996 "The typeof operator cannot be used on the dynamic type");
6999 type
= TypeManager
.type_type
;
7001 return DoResolveBase ();
7004 protected Expression
DoResolveBase ()
7006 if (TypeManager
.system_type_get_type_from_handle
== null) {
7007 TypeManager
.system_type_get_type_from_handle
= TypeManager
.GetPredefinedMethod (
7008 TypeManager
.type_type
, "GetTypeFromHandle", loc
, TypeManager
.runtime_handle_type
);
7011 // Even though what is returned is a type object, it's treated as a value by the compiler.
7012 // In particular, 'typeof (Foo).X' is something totally different from 'Foo.X'.
7013 eclass
= ExprClass
.Value
;
7017 public override void Emit (EmitContext ec
)
7019 ec
.ig
.Emit (OpCodes
.Ldtoken
, TypeManager
.TypeToReflectionType (typearg
));
7020 ec
.ig
.Emit (OpCodes
.Call
, (MethodInfo
) TypeManager
.system_type_get_type_from_handle
.MetaInfo
);
7023 public override bool GetAttributableValue (ResolveContext ec
, Type value_type
, out object value)
7025 if (TypeManager
.ContainsGenericParameters (typearg
) &&
7026 !TypeManager
.IsGenericTypeDefinition (typearg
)) {
7027 ec
.Report
.SymbolRelatedToPreviousError (typearg
);
7028 ec
.Report
.Error (416, loc
, "`{0}': an attribute argument cannot use type parameters",
7029 TypeManager
.CSharpName (typearg
));
7034 if (value_type
== TypeManager
.object_type
) {
7035 value = (object)typearg
;
7042 public override void MutateHoistedGenericType (AnonymousMethodStorey storey
)
7044 if (!TypeManager
.IsGenericTypeDefinition (typearg
))
7045 typearg
= storey
.MutateType (typearg
);
7048 public Type TypeArgument
{
7054 protected override void CloneTo (CloneContext clonectx
, Expression t
)
7056 TypeOf target
= (TypeOf
) t
;
7057 if (QueriedType
!= null)
7058 target
.QueriedType
= QueriedType
.Clone (clonectx
);
7063 /// Implements the `typeof (void)' operator
7065 public class TypeOfVoid
: TypeOf
{
7066 public TypeOfVoid (Location l
) : base (null, l
)
7071 protected override Expression
DoResolve (ResolveContext ec
)
7073 type
= TypeManager
.type_type
;
7074 typearg
= TypeManager
.void_type
;
7076 return DoResolveBase ();
7080 class TypeOfMethod
: TypeOfMember
<MethodSpec
>
7082 public TypeOfMethod (MethodSpec method
, Location loc
)
7083 : base (method
, loc
)
7087 protected override Expression
DoResolve (ResolveContext ec
)
7089 if (member
.IsConstructor
) {
7090 type
= TypeManager
.ctorinfo_type
;
7092 type
= TypeManager
.ctorinfo_type
= TypeManager
.CoreLookupType (ec
.Compiler
, "System.Reflection", "ConstructorInfo", MemberKind
.Class
, true);
7094 type
= TypeManager
.methodinfo_type
;
7096 type
= TypeManager
.methodinfo_type
= TypeManager
.CoreLookupType (ec
.Compiler
, "System.Reflection", "MethodInfo", MemberKind
.Class
, true);
7099 return base.DoResolve (ec
);
7102 public override void Emit (EmitContext ec
)
7104 if (member
.IsConstructor
)
7105 ec
.ig
.Emit (OpCodes
.Ldtoken
, (ConstructorInfo
) member
.MetaInfo
);
7107 ec
.ig
.Emit (OpCodes
.Ldtoken
, (MethodInfo
) member
.MetaInfo
);
7110 ec
.ig
.Emit (OpCodes
.Castclass
, type
);
7113 protected override string GetMethodName
{
7114 get { return "GetMethodFromHandle"; }
7117 protected override string RuntimeHandleName
{
7118 get { return "RuntimeMethodHandle"; }
7121 protected override MethodSpec TypeFromHandle
{
7123 return TypeManager
.methodbase_get_type_from_handle
;
7126 TypeManager
.methodbase_get_type_from_handle
= value;
7130 protected override MethodSpec TypeFromHandleGeneric
{
7132 return TypeManager
.methodbase_get_type_from_handle_generic
;
7135 TypeManager
.methodbase_get_type_from_handle_generic
= value;
7139 protected override string TypeName
{
7140 get { return "MethodBase"; }
7144 abstract class TypeOfMember
<T
> : Expression where T
: MemberSpec
7146 protected readonly T member
;
7148 protected TypeOfMember (T member
, Location loc
)
7150 this.member
= member
;
7154 public override Expression
CreateExpressionTree (ResolveContext ec
)
7156 Arguments args
= new Arguments (2);
7157 args
.Add (new Argument (this));
7158 args
.Add (new Argument (new TypeOf (new TypeExpression (type
, loc
), loc
)));
7159 return CreateExpressionFactoryCall (ec
, "Constant", args
);
7162 protected override Expression
DoResolve (ResolveContext ec
)
7164 bool is_generic
= TypeManager
.IsGenericType (member
.DeclaringType
);
7165 var mi
= is_generic
? TypeFromHandleGeneric
: TypeFromHandle
;
7168 Type t
= TypeManager
.CoreLookupType (ec
.Compiler
, "System.Reflection", TypeName
, MemberKind
.Class
, true);
7169 Type handle_type
= TypeManager
.CoreLookupType (ec
.Compiler
, "System", RuntimeHandleName
, MemberKind
.Class
, true);
7171 if (t
== null || handle_type
== null)
7174 mi
= TypeManager
.GetPredefinedMethod (t
, GetMethodName
, loc
,
7176 new Type
[] { handle_type, TypeManager.runtime_handle_type }
:
7177 new Type
[] { handle_type }
);
7180 TypeFromHandleGeneric
= mi
;
7182 TypeFromHandle
= mi
;
7185 eclass
= ExprClass
.Value
;
7189 public override void Emit (EmitContext ec
)
7191 bool is_generic
= TypeManager
.IsGenericType (member
.DeclaringType
);
7194 mi
= TypeFromHandleGeneric
;
7195 ec
.ig
.Emit (OpCodes
.Ldtoken
, member
.DeclaringType
);
7197 mi
= TypeFromHandle
;
7200 ec
.ig
.Emit (OpCodes
.Call
, (MethodInfo
) mi
.MetaInfo
);
7203 protected abstract string GetMethodName { get; }
7204 protected abstract string RuntimeHandleName { get; }
7205 protected abstract MethodSpec TypeFromHandle { get; set; }
7206 protected abstract MethodSpec TypeFromHandleGeneric { get; set; }
7207 protected abstract string TypeName { get; }
7210 class TypeOfField
: TypeOfMember
<FieldSpec
>
7212 public TypeOfField (FieldSpec field
, Location loc
)
7217 protected override Expression
DoResolve (ResolveContext ec
)
7219 if (TypeManager
.fieldinfo_type
== null)
7220 TypeManager
.fieldinfo_type
= TypeManager
.CoreLookupType (ec
.Compiler
, "System.Reflection", TypeName
, MemberKind
.Class
, true);
7222 type
= TypeManager
.fieldinfo_type
;
7223 return base.DoResolve (ec
);
7226 public override void Emit (EmitContext ec
)
7228 ec
.ig
.Emit (OpCodes
.Ldtoken
, member
.MetaInfo
);
7232 protected override string GetMethodName
{
7233 get { return "GetFieldFromHandle"; }
7236 protected override string RuntimeHandleName
{
7237 get { return "RuntimeFieldHandle"; }
7240 protected override MethodSpec TypeFromHandle
{
7242 return TypeManager
.fieldinfo_get_field_from_handle
;
7245 TypeManager
.fieldinfo_get_field_from_handle
= value;
7249 protected override MethodSpec TypeFromHandleGeneric
{
7251 return TypeManager
.fieldinfo_get_field_from_handle_generic
;
7254 TypeManager
.fieldinfo_get_field_from_handle_generic
= value;
7258 protected override string TypeName
{
7259 get { return "FieldInfo"; }
7264 /// Implements the sizeof expression
7266 public class SizeOf
: Expression
{
7267 readonly Expression QueriedType
;
7270 public SizeOf (Expression queried_type
, Location l
)
7272 this.QueriedType
= queried_type
;
7276 public override Expression
CreateExpressionTree (ResolveContext ec
)
7278 Error_PointerInsideExpressionTree (ec
);
7282 protected override Expression
DoResolve (ResolveContext ec
)
7284 TypeExpr texpr
= QueriedType
.ResolveAsTypeTerminal (ec
, false);
7288 type_queried
= texpr
.Type
;
7289 if (TypeManager
.IsEnumType (type_queried
))
7290 type_queried
= TypeManager
.GetEnumUnderlyingType (type_queried
);
7292 int size_of
= GetTypeSize (type_queried
);
7294 return new IntConstant (size_of
, loc
).Resolve (ec
);
7297 if (!TypeManager
.VerifyUnmanaged (ec
.Compiler
, type_queried
, loc
)){
7302 ec
.Report
.Error (233, loc
,
7303 "`{0}' does not have a predefined size, therefore sizeof can only be used in an unsafe context (consider using System.Runtime.InteropServices.Marshal.SizeOf)",
7304 TypeManager
.CSharpName (type_queried
));
7307 type
= TypeManager
.int32_type
;
7308 eclass
= ExprClass
.Value
;
7312 public override void Emit (EmitContext ec
)
7314 ec
.ig
.Emit (OpCodes
.Sizeof
, type_queried
);
7317 protected override void CloneTo (CloneContext clonectx
, Expression t
)
7323 /// Implements the qualified-alias-member (::) expression.
7325 public class QualifiedAliasMember
: MemberAccess
7327 readonly string alias;
7328 public static readonly string GlobalAlias
= "global";
7330 public QualifiedAliasMember (string alias, string identifier
, TypeArguments targs
, Location l
)
7331 : base (null, identifier
, targs
, l
)
7336 public QualifiedAliasMember (string alias, string identifier
, Location l
)
7337 : base (null, identifier
, l
)
7342 public override FullNamedExpression
ResolveAsTypeStep (IMemberContext ec
, bool silent
)
7344 if (alias == GlobalAlias
) {
7345 expr
= GlobalRootNamespace
.Instance
;
7346 return base.ResolveAsTypeStep (ec
, silent
);
7349 int errors
= ec
.Compiler
.Report
.Errors
;
7350 expr
= ec
.LookupNamespaceAlias (alias);
7352 if (errors
== ec
.Compiler
.Report
.Errors
)
7353 ec
.Compiler
.Report
.Error (432, loc
, "Alias `{0}' not found", alias);
7357 FullNamedExpression fne
= base.ResolveAsTypeStep (ec
, silent
);
7361 if (expr
.eclass
== ExprClass
.Type
) {
7363 ec
.Compiler
.Report
.Error (431, loc
,
7364 "Alias `{0}' cannot be used with '::' since it denotes a type. Consider replacing '::' with '.'", alias);
7372 protected override Expression
DoResolve (ResolveContext ec
)
7374 return ResolveAsTypeStep (ec
, false);
7377 protected override void Error_IdentifierNotFound (IMemberContext rc
, FullNamedExpression expr_type
, string identifier
)
7379 rc
.Compiler
.Report
.Error (687, loc
,
7380 "A namespace alias qualifier `{0}' did not resolve to a namespace or a type",
7381 GetSignatureForError ());
7384 public override string GetSignatureForError ()
7387 if (targs
!= null) {
7388 name
= TypeManager
.RemoveGenericArity (Name
) + "<" +
7389 targs
.GetSignatureForError () + ">";
7392 return alias + "::" + name
;
7395 protected override void CloneTo (CloneContext clonectx
, Expression t
)
7402 /// Implements the member access expression
7404 public class MemberAccess
: ATypeNameExpression
{
7405 protected Expression expr
;
7407 public MemberAccess (Expression expr
, string id
)
7408 : base (id
, expr
.Location
)
7413 public MemberAccess (Expression expr
, string identifier
, Location loc
)
7414 : base (identifier
, loc
)
7419 public MemberAccess (Expression expr
, string identifier
, TypeArguments args
, Location loc
)
7420 : base (identifier
, args
, loc
)
7425 Expression
DoResolve (ResolveContext ec
, Expression right_side
)
7428 throw new Exception ();
7431 // Resolve the expression with flow analysis turned off, we'll do the definite
7432 // assignment checks later. This is because we don't know yet what the expression
7433 // will resolve to - it may resolve to a FieldExpr and in this case we must do the
7434 // definite assignment check on the actual field and not on the whole struct.
7437 SimpleName original
= expr
as SimpleName
;
7438 Expression expr_resolved
;
7439 using (ec
.Set (ResolveContext
.Options
.OmitStructFlowAnalysis
)) {
7440 expr_resolved
= expr
.Resolve (ec
, ResolveFlags
.VariableOrValue
| ResolveFlags
.Type
| ResolveFlags
.Intermediate
);
7443 if (expr_resolved
== null)
7446 string LookupIdentifier
= MemberName
.MakeName (Name
, targs
);
7448 Namespace ns
= expr_resolved
as Namespace
;
7450 FullNamedExpression retval
= ns
.Lookup (ec
.Compiler
, LookupIdentifier
, loc
);
7453 ns
.Error_NamespaceDoesNotExist (loc
, LookupIdentifier
, ec
);
7454 else if (targs
!= null)
7455 retval
= new GenericTypeExpr (retval
.Type
, targs
, loc
).ResolveAsTypeStep (ec
, false);
7460 Type expr_type
= expr_resolved
.Type
;
7461 if (TypeManager
.IsDynamicType (expr_type
)) {
7462 Arguments args
= new Arguments (1);
7463 args
.Add (new Argument (expr_resolved
.Resolve (ec
)));
7464 expr
= new DynamicMemberBinder (Name
, args
, loc
);
7465 if (right_side
!= null)
7466 return expr
.DoResolveLValue (ec
, right_side
);
7468 return expr
.Resolve (ec
);
7471 if (expr_type
.IsPointer
|| expr_type
== TypeManager
.void_type
||
7472 expr_type
== TypeManager
.null_type
|| expr_type
== InternalType
.AnonymousMethod
) {
7473 Unary
.Error_OperatorCannotBeApplied (ec
, loc
, ".", expr_type
);
7477 Constant c
= expr_resolved
as Constant
;
7478 if (c
!= null && c
.GetValue () == null) {
7479 ec
.Report
.Warning (1720, 1, loc
, "Expression will always cause a `{0}'",
7480 "System.NullReferenceException");
7483 if (targs
!= null) {
7484 if (!targs
.Resolve (ec
))
7488 Expression member_lookup
;
7489 member_lookup
= MemberLookup (ec
.Compiler
,
7490 ec
.CurrentType
, expr_type
, expr_type
, Name
, loc
);
7492 if (member_lookup
== null && targs
!= null) {
7493 member_lookup
= MemberLookup (ec
.Compiler
,
7494 ec
.CurrentType
, expr_type
, expr_type
, LookupIdentifier
, loc
);
7497 if (member_lookup
== null) {
7498 ExprClass expr_eclass
= expr_resolved
.eclass
;
7501 // Extension methods are not allowed on all expression types
7503 if (expr_eclass
== ExprClass
.Value
|| expr_eclass
== ExprClass
.Variable
||
7504 expr_eclass
== ExprClass
.IndexerAccess
|| expr_eclass
== ExprClass
.PropertyAccess
||
7505 expr_eclass
== ExprClass
.EventAccess
) {
7506 ExtensionMethodGroupExpr ex_method_lookup
= ec
.LookupExtensionMethod (expr_type
, Name
, loc
);
7507 if (ex_method_lookup
!= null) {
7508 ex_method_lookup
.ExtensionExpression
= expr_resolved
;
7510 if (targs
!= null) {
7511 ex_method_lookup
.SetTypeArguments (ec
, targs
);
7514 return ex_method_lookup
.Resolve (ec
);
7518 expr
= expr_resolved
;
7519 member_lookup
= Error_MemberLookupFailed (ec
,
7520 ec
.CurrentType
, expr_type
, expr_type
, Name
, null,
7521 AllMemberTypes
, AllBindingFlags
);
7522 if (member_lookup
== null)
7526 TypeExpr texpr
= member_lookup
as TypeExpr
;
7527 if (texpr
!= null) {
7528 if (!(expr_resolved
is TypeExpr
) &&
7529 (original
== null || !original
.IdenticalNameAndTypeName (ec
, expr_resolved
, loc
))) {
7530 ec
.Report
.Error (572, loc
, "`{0}': cannot reference a type through an expression; try `{1}' instead",
7531 Name
, member_lookup
.GetSignatureForError ());
7535 if (!texpr
.CheckAccessLevel (ec
.MemberContext
)) {
7536 ec
.Report
.SymbolRelatedToPreviousError (member_lookup
.Type
);
7537 ErrorIsInaccesible (loc
, TypeManager
.CSharpName (member_lookup
.Type
), ec
.Report
);
7541 GenericTypeExpr ct
= expr_resolved
as GenericTypeExpr
;
7544 // When looking up a nested type in a generic instance
7545 // via reflection, we always get a generic type definition
7546 // and not a generic instance - so we have to do this here.
7548 // See gtest-172-lib.cs and gtest-172.cs for an example.
7551 TypeArguments nested_targs
;
7552 if (HasTypeArguments
) {
7553 nested_targs
= ct
.TypeArguments
.Clone ();
7554 nested_targs
.Add (targs
);
7556 nested_targs
= ct
.TypeArguments
;
7559 ct
= new GenericTypeExpr (member_lookup
.Type
, nested_targs
, loc
);
7561 return ct
.ResolveAsTypeStep (ec
, false);
7564 return member_lookup
;
7567 MemberExpr me
= (MemberExpr
) member_lookup
;
7568 me
= me
.ResolveMemberAccess (ec
, expr_resolved
, loc
, original
);
7572 if (targs
!= null) {
7573 me
.SetTypeArguments (ec
, targs
);
7576 if (original
!= null && (!TypeManager
.IsValueType (expr_type
) || me
is PropertyExpr
)) {
7577 if (me
.IsInstance
) {
7578 LocalVariableReference
var = expr_resolved
as LocalVariableReference
;
7579 if (var != null && !var.VerifyAssigned (ec
))
7584 // The following DoResolve/DoResolveLValue will do the definite assignment
7587 if (right_side
!= null)
7588 return me
.DoResolveLValue (ec
, right_side
);
7590 return me
.Resolve (ec
);
7593 protected override Expression
DoResolve (ResolveContext ec
)
7595 return DoResolve (ec
, null);
7598 public override Expression
DoResolveLValue (ResolveContext ec
, Expression right_side
)
7600 return DoResolve (ec
, right_side
);
7603 public override FullNamedExpression
ResolveAsTypeStep (IMemberContext ec
, bool silent
)
7605 return ResolveNamespaceOrType (ec
, silent
);
7608 public FullNamedExpression
ResolveNamespaceOrType (IMemberContext rc
, bool silent
)
7610 FullNamedExpression expr_resolved
= expr
.ResolveAsTypeStep (rc
, silent
);
7612 if (expr_resolved
== null)
7615 string LookupIdentifier
= MemberName
.MakeName (Name
, targs
);
7617 Namespace ns
= expr_resolved
as Namespace
;
7619 FullNamedExpression retval
= ns
.Lookup (rc
.Compiler
, LookupIdentifier
, loc
);
7621 if (retval
== null && !silent
)
7622 ns
.Error_NamespaceDoesNotExist (loc
, LookupIdentifier
, rc
);
7623 else if (targs
!= null)
7624 retval
= new GenericTypeExpr (retval
.Type
, targs
, loc
).ResolveAsTypeStep (rc
, silent
);
7629 TypeExpr tnew_expr
= expr_resolved
.ResolveAsTypeTerminal (rc
, false);
7630 if (tnew_expr
== null)
7633 Type expr_type
= tnew_expr
.Type
;
7634 if (TypeManager
.IsGenericParameter (expr_type
)) {
7635 rc
.Compiler
.Report
.Error (704, loc
, "A nested type cannot be specified through a type parameter `{0}'",
7636 tnew_expr
.GetSignatureForError ());
7640 Expression member_lookup
= MemberLookup (rc
.Compiler
,
7641 rc
.CurrentType
, expr_type
, expr_type
, LookupIdentifier
,
7642 MemberTypes
.NestedType
, BindingFlags
.Public
| BindingFlags
.NonPublic
, loc
);
7643 if (member_lookup
== null) {
7647 Error_IdentifierNotFound (rc
, expr_resolved
, LookupIdentifier
);
7651 TypeExpr texpr
= member_lookup
.ResolveAsTypeTerminal (rc
, false);
7655 TypeArguments the_args
= targs
;
7656 Type declaring_type
= texpr
.Type
.DeclaringType
;
7657 if (TypeManager
.HasGenericArguments (declaring_type
) && !TypeManager
.IsGenericTypeDefinition (expr_type
)) {
7658 while (!TypeManager
.IsEqual (TypeManager
.DropGenericTypeArguments (expr_type
), declaring_type
)) {
7659 expr_type
= expr_type
.BaseType
;
7662 TypeArguments new_args
= new TypeArguments ();
7663 foreach (Type decl
in TypeManager
.GetTypeArguments (expr_type
))
7664 new_args
.Add (new TypeExpression (TypeManager
.TypeToCoreType (decl
), loc
));
7667 new_args
.Add (targs
);
7669 the_args
= new_args
;
7672 if (the_args
!= null) {
7673 GenericTypeExpr ctype
= new GenericTypeExpr (texpr
.Type
, the_args
, loc
);
7674 return ctype
.ResolveAsTypeStep (rc
, false);
7680 protected virtual void Error_IdentifierNotFound (IMemberContext rc
, FullNamedExpression expr_type
, string identifier
)
7682 Expression member_lookup
= MemberLookup (rc
.Compiler
,
7683 rc
.CurrentType
, expr_type
.Type
, expr_type
.Type
, SimpleName
.RemoveGenericArity (identifier
),
7684 MemberTypes
.NestedType
, BindingFlags
.Public
| BindingFlags
.NonPublic
, loc
);
7686 if (member_lookup
!= null) {
7687 expr_type
= member_lookup
.ResolveAsTypeTerminal (rc
, false);
7688 if (expr_type
== null)
7691 expr_type
.Error_TypeArgumentsCannotBeUsed (rc
.Compiler
.Report
, loc
);
7695 member_lookup
= MemberLookup (rc
.Compiler
,
7696 rc
.CurrentType
, expr_type
.Type
, expr_type
.Type
, identifier
,
7697 MemberTypes
.All
, BindingFlags
.Public
| BindingFlags
.NonPublic
, loc
);
7699 if (member_lookup
== null) {
7700 rc
.Compiler
.Report
.Error (426, loc
, "The nested type `{0}' does not exist in the type `{1}'",
7701 Name
, expr_type
.GetSignatureForError ());
7703 // TODO: Report.SymbolRelatedToPreviousError
7704 member_lookup
.Error_UnexpectedKind (rc
.Compiler
.Report
, null, "type", loc
);
7708 protected override void Error_TypeDoesNotContainDefinition (ResolveContext ec
, Type type
, string name
)
7710 if (RootContext
.Version
> LanguageVersion
.ISO_2
&& !ec
.Compiler
.IsRuntimeBinder
&&
7711 ((expr
.eclass
& (ExprClass
.Value
| ExprClass
.Variable
)) != 0)) {
7712 ec
.Report
.Error (1061, loc
, "Type `{0}' does not contain a definition for `{1}' and no " +
7713 "extension method `{1}' of type `{0}' could be found " +
7714 "(are you missing a using directive or an assembly reference?)",
7715 TypeManager
.CSharpName (type
), name
);
7719 base.Error_TypeDoesNotContainDefinition (ec
, type
, name
);
7722 public override string GetSignatureForError ()
7724 return expr
.GetSignatureForError () + "." + base.GetSignatureForError ();
7727 public Expression Left
{
7733 protected override void CloneTo (CloneContext clonectx
, Expression t
)
7735 MemberAccess target
= (MemberAccess
) t
;
7737 target
.expr
= expr
.Clone (clonectx
);
7742 /// Implements checked expressions
7744 public class CheckedExpr
: Expression
{
7746 public Expression Expr
;
7748 public CheckedExpr (Expression e
, Location l
)
7754 public override Expression
CreateExpressionTree (ResolveContext ec
)
7756 using (ec
.With (ResolveContext
.Options
.AllCheckStateFlags
, true))
7757 return Expr
.CreateExpressionTree (ec
);
7760 protected override Expression
DoResolve (ResolveContext ec
)
7762 using (ec
.With (ResolveContext
.Options
.AllCheckStateFlags
, true))
7763 Expr
= Expr
.Resolve (ec
);
7768 if (Expr
is Constant
|| Expr
is MethodGroupExpr
|| Expr
is AnonymousMethodExpression
|| Expr
is DefaultValueExpression
)
7771 eclass
= Expr
.eclass
;
7776 public override void Emit (EmitContext ec
)
7778 using (ec
.With (EmitContext
.Options
.AllCheckStateFlags
, true))
7782 public override void EmitBranchable (EmitContext ec
, Label target
, bool on_true
)
7784 using (ec
.With (EmitContext
.Options
.AllCheckStateFlags
, true))
7785 Expr
.EmitBranchable (ec
, target
, on_true
);
7788 public override SLE
.Expression
MakeExpression (BuilderContext ctx
)
7790 using (ctx
.With (BuilderContext
.Options
.AllCheckStateFlags
, true)) {
7791 return Expr
.MakeExpression (ctx
);
7795 public override void MutateHoistedGenericType (AnonymousMethodStorey storey
)
7797 Expr
.MutateHoistedGenericType (storey
);
7800 protected override void CloneTo (CloneContext clonectx
, Expression t
)
7802 CheckedExpr target
= (CheckedExpr
) t
;
7804 target
.Expr
= Expr
.Clone (clonectx
);
7809 /// Implements the unchecked expression
7811 public class UnCheckedExpr
: Expression
{
7813 public Expression Expr
;
7815 public UnCheckedExpr (Expression e
, Location l
)
7821 public override Expression
CreateExpressionTree (ResolveContext ec
)
7823 using (ec
.With (ResolveContext
.Options
.AllCheckStateFlags
, false))
7824 return Expr
.CreateExpressionTree (ec
);
7827 protected override Expression
DoResolve (ResolveContext ec
)
7829 using (ec
.With (ResolveContext
.Options
.AllCheckStateFlags
, false))
7830 Expr
= Expr
.Resolve (ec
);
7835 if (Expr
is Constant
|| Expr
is MethodGroupExpr
|| Expr
is AnonymousMethodExpression
|| Expr
is DefaultValueExpression
)
7838 eclass
= Expr
.eclass
;
7843 public override void Emit (EmitContext ec
)
7845 using (ec
.With (EmitContext
.Options
.AllCheckStateFlags
, false))
7849 public override void EmitBranchable (EmitContext ec
, Label target
, bool on_true
)
7851 using (ec
.With (EmitContext
.Options
.AllCheckStateFlags
, false))
7852 Expr
.EmitBranchable (ec
, target
, on_true
);
7855 public override void MutateHoistedGenericType (AnonymousMethodStorey storey
)
7857 Expr
.MutateHoistedGenericType (storey
);
7860 protected override void CloneTo (CloneContext clonectx
, Expression t
)
7862 UnCheckedExpr target
= (UnCheckedExpr
) t
;
7864 target
.Expr
= Expr
.Clone (clonectx
);
7869 /// An Element Access expression.
7871 /// During semantic analysis these are transformed into
7872 /// IndexerAccess, ArrayAccess or a PointerArithmetic.
7874 public class ElementAccess
: Expression
{
7875 public Arguments Arguments
;
7876 public Expression Expr
;
7878 public ElementAccess (Expression e
, Arguments args
)
7882 this.Arguments
= args
;
7885 public override Expression
CreateExpressionTree (ResolveContext ec
)
7887 Arguments args
= Arguments
.CreateForExpressionTree (ec
, Arguments
,
7888 Expr
.CreateExpressionTree (ec
));
7890 return CreateExpressionFactoryCall (ec
, "ArrayIndex", args
);
7893 Expression
MakePointerAccess (ResolveContext ec
, Type t
)
7895 if (Arguments
.Count
!= 1){
7896 ec
.Report
.Error (196, loc
, "A pointer must be indexed by only one value");
7900 if (Arguments
[0] is NamedArgument
)
7901 Error_NamedArgument ((NamedArgument
) Arguments
[0], ec
.Report
);
7903 Expression p
= new PointerArithmetic (Binary
.Operator
.Addition
, Expr
, Arguments
[0].Expr
.Resolve (ec
), t
, loc
);
7904 return new Indirection (p
, loc
).Resolve (ec
);
7907 protected override Expression
DoResolve (ResolveContext ec
)
7909 Expr
= Expr
.Resolve (ec
);
7914 // We perform some simple tests, and then to "split" the emit and store
7915 // code we create an instance of a different class, and return that.
7917 // I am experimenting with this pattern.
7921 if (t
== TypeManager
.array_type
){
7922 ec
.Report
.Error (21, loc
, "Cannot apply indexing with [] to an expression of type `System.Array'");
7927 return (new ArrayAccess (this, loc
)).Resolve (ec
);
7929 return MakePointerAccess (ec
, t
);
7931 FieldExpr fe
= Expr
as FieldExpr
;
7933 var ff
= fe
.Spec
as FixedFieldSpec
;
7935 return MakePointerAccess (ec
, ff
.ElementType
);
7938 return (new IndexerAccess (this, loc
)).Resolve (ec
);
7941 public override Expression
DoResolveLValue (ResolveContext ec
, Expression right_side
)
7943 Expr
= Expr
.Resolve (ec
);
7949 return (new ArrayAccess (this, loc
)).DoResolveLValue (ec
, right_side
);
7952 return MakePointerAccess (ec
, type
);
7954 if (Expr
.eclass
!= ExprClass
.Variable
&& TypeManager
.IsStruct (type
))
7955 Error_CannotModifyIntermediateExpressionValue (ec
);
7957 return (new IndexerAccess (this, loc
)).DoResolveLValue (ec
, right_side
);
7960 public override void Emit (EmitContext ec
)
7962 throw new Exception ("Should never be reached");
7965 public static void Error_NamedArgument (NamedArgument na
, Report Report
)
7967 Report
.Error (1742, na
.Location
, "An element access expression cannot use named argument");
7970 public override string GetSignatureForError ()
7972 return Expr
.GetSignatureForError ();
7975 protected override void CloneTo (CloneContext clonectx
, Expression t
)
7977 ElementAccess target
= (ElementAccess
) t
;
7979 target
.Expr
= Expr
.Clone (clonectx
);
7980 if (Arguments
!= null)
7981 target
.Arguments
= Arguments
.Clone (clonectx
);
7986 /// Implements array access
7988 public class ArrayAccess
: Expression
, IDynamicAssign
, IMemoryLocation
{
7990 // Points to our "data" repository
7994 LocalTemporary temp
;
7998 public ArrayAccess (ElementAccess ea_data
, Location l
)
8004 public override Expression
CreateExpressionTree (ResolveContext ec
)
8006 return ea
.CreateExpressionTree (ec
);
8009 public override Expression
DoResolveLValue (ResolveContext ec
, Expression right_side
)
8011 return DoResolve (ec
);
8014 protected override Expression
DoResolve (ResolveContext ec
)
8016 // dynamic is used per argument in ConvertExpressionToArrayIndex case
8018 ea
.Arguments
.Resolve (ec
, out dynamic);
8020 Type t
= ea
.Expr
.Type
;
8021 int rank
= ea
.Arguments
.Count
;
8022 if (t
.GetArrayRank () != rank
) {
8023 ec
.Report
.Error (22, ea
.Location
, "Wrong number of indexes `{0}' inside [], expected `{1}'",
8024 ea
.Arguments
.Count
.ToString (), t
.GetArrayRank ().ToString ());
8028 type
= TypeManager
.GetElementType (t
);
8029 if (type
.IsPointer
&& !ec
.IsUnsafe
) {
8030 UnsafeError (ec
, ea
.Location
);
8033 foreach (Argument a
in ea
.Arguments
) {
8034 if (a
is NamedArgument
)
8035 ElementAccess
.Error_NamedArgument ((NamedArgument
) a
, ec
.Report
);
8037 a
.Expr
= ConvertExpressionToArrayIndex (ec
, a
.Expr
);
8040 eclass
= ExprClass
.Variable
;
8046 /// Emits the right opcode to load an object of Type `t'
8047 /// from an array of T
8049 void EmitLoadOpcode (ILGenerator ig
, Type type
, int rank
)
8052 MethodInfo
get = FetchGetMethod ();
8053 ig
.Emit (OpCodes
.Call
, get);
8057 if (type
== TypeManager
.byte_type
|| type
== TypeManager
.bool_type
)
8058 ig
.Emit (OpCodes
.Ldelem_U1
);
8059 else if (type
== TypeManager
.sbyte_type
)
8060 ig
.Emit (OpCodes
.Ldelem_I1
);
8061 else if (type
== TypeManager
.short_type
)
8062 ig
.Emit (OpCodes
.Ldelem_I2
);
8063 else if (type
== TypeManager
.ushort_type
|| type
== TypeManager
.char_type
)
8064 ig
.Emit (OpCodes
.Ldelem_U2
);
8065 else if (type
== TypeManager
.int32_type
)
8066 ig
.Emit (OpCodes
.Ldelem_I4
);
8067 else if (type
== TypeManager
.uint32_type
)
8068 ig
.Emit (OpCodes
.Ldelem_U4
);
8069 else if (type
== TypeManager
.uint64_type
)
8070 ig
.Emit (OpCodes
.Ldelem_I8
);
8071 else if (type
== TypeManager
.int64_type
)
8072 ig
.Emit (OpCodes
.Ldelem_I8
);
8073 else if (type
== TypeManager
.float_type
)
8074 ig
.Emit (OpCodes
.Ldelem_R4
);
8075 else if (type
== TypeManager
.double_type
)
8076 ig
.Emit (OpCodes
.Ldelem_R8
);
8077 else if (type
== TypeManager
.intptr_type
)
8078 ig
.Emit (OpCodes
.Ldelem_I
);
8079 else if (TypeManager
.IsEnumType (type
)){
8080 EmitLoadOpcode (ig
, TypeManager
.GetEnumUnderlyingType (type
), rank
);
8081 } else if (TypeManager
.IsStruct (type
)){
8082 ig
.Emit (OpCodes
.Ldelema
, type
);
8083 ig
.Emit (OpCodes
.Ldobj
, type
);
8084 } else if (type
.IsGenericParameter
) {
8085 ig
.Emit (OpCodes
.Ldelem
, type
);
8086 } else if (type
.IsPointer
)
8087 ig
.Emit (OpCodes
.Ldelem_I
);
8089 ig
.Emit (OpCodes
.Ldelem_Ref
);
8092 protected override void Error_NegativeArrayIndex (ResolveContext ec
, Location loc
)
8094 ec
.Report
.Warning (251, 2, loc
, "Indexing an array with a negative index (array indices always start at zero)");
8098 /// Returns the right opcode to store an object of Type `t'
8099 /// from an array of T.
8101 static public OpCode
GetStoreOpcode (Type t
, out bool is_stobj
, out bool has_type_arg
)
8103 has_type_arg
= false; is_stobj
= false;
8104 t
= TypeManager
.TypeToCoreType (t
);
8105 if (TypeManager
.IsEnumType (t
))
8106 t
= TypeManager
.GetEnumUnderlyingType (t
);
8107 if (t
== TypeManager
.byte_type
|| t
== TypeManager
.sbyte_type
||
8108 t
== TypeManager
.bool_type
)
8109 return OpCodes
.Stelem_I1
;
8110 else if (t
== TypeManager
.short_type
|| t
== TypeManager
.ushort_type
||
8111 t
== TypeManager
.char_type
)
8112 return OpCodes
.Stelem_I2
;
8113 else if (t
== TypeManager
.int32_type
|| t
== TypeManager
.uint32_type
)
8114 return OpCodes
.Stelem_I4
;
8115 else if (t
== TypeManager
.int64_type
|| t
== TypeManager
.uint64_type
)
8116 return OpCodes
.Stelem_I8
;
8117 else if (t
== TypeManager
.float_type
)
8118 return OpCodes
.Stelem_R4
;
8119 else if (t
== TypeManager
.double_type
)
8120 return OpCodes
.Stelem_R8
;
8121 else if (t
== TypeManager
.intptr_type
) {
8122 has_type_arg
= true;
8124 return OpCodes
.Stobj
;
8125 } else if (TypeManager
.IsStruct (t
)) {
8126 has_type_arg
= true;
8128 return OpCodes
.Stobj
;
8129 } else if (t
.IsGenericParameter
) {
8130 has_type_arg
= true;
8131 return OpCodes
.Stelem
;
8132 } else if (t
.IsPointer
)
8133 return OpCodes
.Stelem_I
;
8135 return OpCodes
.Stelem_Ref
;
8138 MethodInfo
FetchGetMethod ()
8140 ModuleBuilder mb
= RootContext
.ToplevelTypes
.Builder
;
8141 int arg_count
= ea
.Arguments
.Count
;
8142 Type
[] args
= new Type
[arg_count
];
8145 for (int i
= 0; i
< arg_count
; i
++){
8146 //args [i++] = a.Type;
8147 args
[i
] = TypeManager
.int32_type
;
8150 get = mb
.GetArrayMethod (
8151 ea
.Expr
.Type
, "Get",
8152 CallingConventions
.HasThis
|
8153 CallingConventions
.Standard
,
8159 MethodInfo
FetchAddressMethod ()
8161 ModuleBuilder mb
= RootContext
.ToplevelTypes
.Builder
;
8162 int arg_count
= ea
.Arguments
.Count
;
8163 Type
[] args
= new Type
[arg_count
];
8167 ret_type
= TypeManager
.GetReferenceType (type
);
8169 for (int i
= 0; i
< arg_count
; i
++){
8170 //args [i++] = a.Type;
8171 args
[i
] = TypeManager
.int32_type
;
8174 address
= mb
.GetArrayMethod (
8175 ea
.Expr
.Type
, "Address",
8176 CallingConventions
.HasThis
|
8177 CallingConventions
.Standard
,
8184 // Load the array arguments into the stack.
8186 void LoadArrayAndArguments (EmitContext ec
)
8190 for (int i
= 0; i
< ea
.Arguments
.Count
; ++i
) {
8191 ea
.Arguments
[i
].Emit (ec
);
8195 public void Emit (EmitContext ec
, bool leave_copy
)
8197 int rank
= ea
.Expr
.Type
.GetArrayRank ();
8198 ILGenerator ig
= ec
.ig
;
8201 LoadFromPtr (ig
, this.type
);
8203 LoadArrayAndArguments (ec
);
8204 EmitLoadOpcode (ig
, type
, rank
);
8208 ig
.Emit (OpCodes
.Dup
);
8209 temp
= new LocalTemporary (this.type
);
8214 public override void Emit (EmitContext ec
)
8219 public void EmitAssign (EmitContext ec
, Expression source
, bool leave_copy
, bool prepare_for_load
)
8221 int rank
= ea
.Expr
.Type
.GetArrayRank ();
8222 ILGenerator ig
= ec
.ig
;
8223 Type t
= source
.Type
;
8224 prepared
= prepare_for_load
;
8227 AddressOf (ec
, AddressOp
.LoadStore
);
8228 ec
.ig
.Emit (OpCodes
.Dup
);
8230 LoadArrayAndArguments (ec
);
8234 bool is_stobj
, has_type_arg
;
8235 OpCode op
= GetStoreOpcode (t
, out is_stobj
, out has_type_arg
);
8239 // The stobj opcode used by value types will need
8240 // an address on the stack, not really an array/array
8244 ig
.Emit (OpCodes
.Ldelema
, t
);
8249 ec
.ig
.Emit (OpCodes
.Dup
);
8250 temp
= new LocalTemporary (this.type
);
8255 StoreFromPtr (ig
, t
);
8257 ig
.Emit (OpCodes
.Stobj
, t
);
8258 else if (has_type_arg
)
8265 ec
.ig
.Emit (OpCodes
.Dup
);
8266 temp
= new LocalTemporary (this.type
);
8271 StoreFromPtr (ig
, t
);
8273 int arg_count
= ea
.Arguments
.Count
;
8274 Type
[] args
= new Type
[arg_count
+ 1];
8275 for (int i
= 0; i
< arg_count
; i
++) {
8276 //args [i++] = a.Type;
8277 args
[i
] = TypeManager
.int32_type
;
8279 args
[arg_count
] = type
;
8281 MethodInfo
set = RootContext
.ToplevelTypes
.Builder
.GetArrayMethod (
8282 ea
.Expr
.Type
, "Set",
8283 CallingConventions
.HasThis
|
8284 CallingConventions
.Standard
,
8285 TypeManager
.void_type
, args
);
8287 ig
.Emit (OpCodes
.Call
, set);
8297 public void EmitNew (EmitContext ec
, New source
, bool leave_copy
)
8299 if (!source
.Emit (ec
, this)) {
8301 throw new NotImplementedException ();
8306 throw new NotImplementedException ();
8309 public void AddressOf (EmitContext ec
, AddressOp mode
)
8311 int rank
= ea
.Expr
.Type
.GetArrayRank ();
8312 ILGenerator ig
= ec
.ig
;
8314 LoadArrayAndArguments (ec
);
8317 ig
.Emit (OpCodes
.Ldelema
, type
);
8319 MethodInfo address
= FetchAddressMethod ();
8320 ig
.Emit (OpCodes
.Call
, address
);
8325 public SLE
.Expression
MakeAssignExpression (BuilderContext ctx
)
8327 return SLE
.Expression
.ArrayAccess (
8328 ea
.Expr
.MakeExpression (ctx
),
8329 Arguments
.MakeExpression (ea
.Arguments
, ctx
));
8333 public override SLE
.Expression
MakeExpression (BuilderContext ctx
)
8335 return SLE
.Expression
.ArrayIndex (
8336 ea
.Expr
.MakeExpression (ctx
),
8337 Arguments
.MakeExpression (ea
.Arguments
, ctx
));
8340 public override void MutateHoistedGenericType (AnonymousMethodStorey storey
)
8342 type
= storey
.MutateType (type
);
8343 ea
.Expr
.Type
= storey
.MutateType (ea
.Expr
.Type
);
8348 /// Expressions that represent an indexer call.
8350 public class IndexerAccess
: Expression
, IDynamicAssign
8352 class IndexerMethodGroupExpr
: MethodGroupExpr
8354 public IndexerMethodGroupExpr (Indexers indexers
, Location loc
)
8357 Methods
= indexers
.Methods
.ToArray ();
8360 public override string Name
{
8366 protected override int GetApplicableParametersCount (MethodSpec method
, AParametersCollection parameters
)
8369 // Here is the trick, decrease number of arguments by 1 when only
8370 // available property method is setter. This makes overload resolution
8371 // work correctly for indexers.
8374 if (method
.Name
[0] == 'g')
8375 return parameters
.Count
;
8377 return parameters
.Count
- 1;
8383 // Contains either property getter or setter
8384 public List
<MethodSpec
> Methods
;
8385 public List
<PropertyInfo
> Properties
;
8391 void Append (Type caller_type
, MemberInfo
[] mi
)
8396 foreach (PropertyInfo property
in mi
) {
8397 MethodInfo accessor
= property
.GetGetMethod (true);
8398 if (accessor
== null)
8399 accessor
= property
.GetSetMethod (true);
8401 if (Methods
== null) {
8402 Methods
= new List
<MethodSpec
> ();
8403 Properties
= new List
<PropertyInfo
> ();
8406 Methods
.Add (Import
.CreateMethod (accessor
));
8407 Properties
.Add (property
);
8411 static MemberInfo
[] GetIndexersForTypeOrInterface (Type caller_type
, Type lookup_type
)
8413 string p_name
= TypeManager
.IndexerPropertyName (lookup_type
);
8415 return TypeManager
.MemberLookup (
8416 caller_type
, caller_type
, lookup_type
, MemberTypes
.Property
,
8417 BindingFlags
.Public
| BindingFlags
.Instance
|
8418 BindingFlags
.DeclaredOnly
, p_name
, null);
8421 public static Indexers
GetIndexersForType (Type caller_type
, Type lookup_type
)
8423 Indexers ix
= new Indexers ();
8425 if (TypeManager
.IsGenericParameter (lookup_type
)) {
8426 GenericConstraints gc
= TypeManager
.GetTypeParameterConstraints (lookup_type
);
8430 if (gc
.HasClassConstraint
) {
8431 Type class_contraint
= gc
.ClassConstraint
;
8432 while (class_contraint
!= TypeManager
.object_type
&& class_contraint
!= null) {
8433 ix
.Append (caller_type
, GetIndexersForTypeOrInterface (caller_type
, class_contraint
));
8434 class_contraint
= class_contraint
.BaseType
;
8438 Type
[] ifaces
= gc
.InterfaceConstraints
;
8439 foreach (Type itype
in ifaces
)
8440 ix
.Append (caller_type
, GetIndexersForTypeOrInterface (caller_type
, itype
));
8445 Type copy
= lookup_type
;
8446 while (copy
!= TypeManager
.object_type
&& copy
!= null){
8447 ix
.Append (caller_type
, GetIndexersForTypeOrInterface (caller_type
, copy
));
8448 copy
= copy
.BaseType
;
8451 if (lookup_type
.IsInterface
) {
8452 Type
[] ifaces
= TypeManager
.GetInterfaces (lookup_type
);
8453 if (ifaces
!= null) {
8454 foreach (Type itype
in ifaces
)
8455 ix
.Append (caller_type
, GetIndexersForTypeOrInterface (caller_type
, itype
));
8464 // Points to our "data" repository
8466 MethodSpec
get, set;
8467 bool is_base_indexer
;
8469 LocalTemporary temp
;
8470 LocalTemporary prepared_value
;
8471 Expression set_expr
;
8473 protected Type indexer_type
;
8474 protected Type current_type
;
8475 protected Expression instance_expr
;
8476 protected Arguments arguments
;
8478 public IndexerAccess (ElementAccess ea
, Location loc
)
8479 : this (ea
.Expr
, false, loc
)
8481 this.arguments
= ea
.Arguments
;
8484 protected IndexerAccess (Expression instance_expr
, bool is_base_indexer
,
8487 this.instance_expr
= instance_expr
;
8488 this.is_base_indexer
= is_base_indexer
;
8492 static string GetAccessorName (bool isSet
)
8494 return isSet
? "set" : "get";
8497 public override Expression
CreateExpressionTree (ResolveContext ec
)
8499 Arguments args
= Arguments
.CreateForExpressionTree (ec
, arguments
,
8500 instance_expr
.CreateExpressionTree (ec
),
8501 new TypeOfMethod (get, loc
));
8503 return CreateExpressionFactoryCall (ec
, "Call", args
);
8506 protected virtual void CommonResolve (ResolveContext ec
)
8508 indexer_type
= instance_expr
.Type
;
8509 current_type
= ec
.CurrentType
;
8512 protected override Expression
DoResolve (ResolveContext ec
)
8514 return ResolveAccessor (ec
, null);
8517 public override Expression
DoResolveLValue (ResolveContext ec
, Expression right_side
)
8519 if (right_side
== EmptyExpression
.OutAccess
.Instance
) {
8520 right_side
.DoResolveLValue (ec
, this);
8524 // if the indexer returns a value type, and we try to set a field in it
8525 if (right_side
== EmptyExpression
.LValueMemberAccess
|| right_side
== EmptyExpression
.LValueMemberOutAccess
) {
8526 Error_CannotModifyIntermediateExpressionValue (ec
);
8529 return ResolveAccessor (ec
, right_side
);
8532 Expression
ResolveAccessor (ResolveContext ec
, Expression right_side
)
8540 arguments
.Resolve (ec
, out dynamic);
8542 if (TypeManager
.IsDynamicType (indexer_type
)) {
8547 ilist
= Indexers
.GetIndexersForType (current_type
, indexer_type
);
8548 if (ilist
.Methods
== null) {
8549 ec
.Report
.Error (21, loc
, "Cannot apply indexing with [] to an expression of type `{0}'",
8550 TypeManager
.CSharpName (indexer_type
));
8554 mg
= new IndexerMethodGroupExpr (ilist
, loc
);
8555 mg
= mg
.OverloadResolve (ec
, ref arguments
, false, loc
);
8561 Arguments args
= new Arguments (arguments
.Count
+ 1);
8562 if (is_base_indexer
) {
8563 ec
.Report
.Error (1972, loc
, "The indexer base access cannot be dynamically dispatched. Consider casting the dynamic arguments or eliminating the base access");
8565 args
.Add (new Argument (instance_expr
));
8567 args
.AddRange (arguments
);
8569 var expr
= new DynamicIndexBinder (args
, loc
);
8570 if (right_side
!= null)
8571 return expr
.ResolveLValue (ec
, right_side
);
8573 return expr
.Resolve (ec
);
8576 var mi
= (MethodSpec
) mg
;
8577 PropertyInfo pi
= null;
8578 for (int i
= 0; i
< ilist
.Methods
.Count
; ++i
) {
8579 if (ilist
.Methods
[i
].MetaInfo
== mi
.MetaInfo
) {
8580 pi
= (PropertyInfo
) ilist
.Properties
[i
];
8585 type
= TypeManager
.TypeToCoreType (pi
.PropertyType
);
8586 if (type
.IsPointer
&& !ec
.IsUnsafe
)
8587 UnsafeError (ec
, loc
);
8589 MethodSpec accessor
= null;
8590 if (right_side
== null) {
8591 var m
= pi
.GetGetMethod (true);
8593 accessor
= get = Import
.CreateMethod (m
);
8595 var m
= pi
.GetSetMethod (true);
8597 accessor
= set = Import
.CreateMethod (m
);
8598 if (accessor
== null && pi
.GetGetMethod (true) != null) {
8599 ec
.Report
.SymbolRelatedToPreviousError (pi
);
8600 ec
.Report
.Error (200, loc
, "The read only property or indexer `{0}' cannot be assigned to",
8601 TypeManager
.GetFullNameSignature (pi
));
8605 set_expr
= Convert
.ImplicitConversion (ec
, right_side
, type
, loc
);
8608 if (accessor
== null) {
8609 ec
.Report
.SymbolRelatedToPreviousError (pi
);
8610 ec
.Report
.Error (154, loc
, "The property or indexer `{0}' cannot be used in this context because it lacks a `{1}' accessor",
8611 TypeManager
.GetFullNameSignature (pi
), GetAccessorName (right_side
!= null));
8616 // Only base will allow this invocation to happen.
8618 if (accessor
.IsAbstract
&& this is BaseIndexerAccess
) {
8619 Error_CannotCallAbstractBase (ec
, TypeManager
.GetFullNameSignature (pi
));
8622 bool must_do_cs1540_check
;
8623 if (!IsAccessorAccessible (ec
.CurrentType
, accessor
, out must_do_cs1540_check
)) {
8625 var m
= pi
.GetSetMethod (true);
8627 set = Import
.CreateMethod (m
);
8629 var m
= pi
.GetGetMethod (true);
8631 get = Import
.CreateMethod (m
);
8634 if (set != null && get != null &&
8635 (set.MetaInfo
.Attributes
& MethodAttributes
.MemberAccessMask
) != (get.MetaInfo
.Attributes
& MethodAttributes
.MemberAccessMask
)) {
8636 ec
.Report
.SymbolRelatedToPreviousError (accessor
.MetaInfo
);
8637 ec
.Report
.Error (271, loc
, "The property or indexer `{0}' cannot be used in this context because a `{1}' accessor is inaccessible",
8638 TypeManager
.GetFullNameSignature (pi
), GetAccessorName (right_side
!= null));
8640 ec
.Report
.SymbolRelatedToPreviousError (pi
);
8641 ErrorIsInaccesible (loc
, TypeManager
.GetFullNameSignature (pi
), ec
.Report
);
8645 instance_expr
.CheckMarshalByRefAccess (ec
);
8646 eclass
= ExprClass
.IndexerAccess
;
8650 public override void Emit (EmitContext ec
)
8655 public void Emit (EmitContext ec
, bool leave_copy
)
8658 prepared_value
.Emit (ec
);
8660 Invocation
.EmitCall (ec
, is_base_indexer
, instance_expr
, get,
8661 arguments
, loc
, false, false);
8665 ec
.ig
.Emit (OpCodes
.Dup
);
8666 temp
= new LocalTemporary (Type
);
8672 // source is ignored, because we already have a copy of it from the
8673 // LValue resolution and we have already constructed a pre-cached
8674 // version of the arguments (ea.set_arguments);
8676 public void EmitAssign (EmitContext ec
, Expression source
, bool leave_copy
, bool prepare_for_load
)
8678 prepared
= prepare_for_load
;
8679 Expression
value = set_expr
;
8682 Invocation
.EmitCall (ec
, is_base_indexer
, instance_expr
, get,
8683 arguments
, loc
, true, false);
8685 prepared_value
= new LocalTemporary (type
);
8686 prepared_value
.Store (ec
);
8688 prepared_value
.Release (ec
);
8691 ec
.ig
.Emit (OpCodes
.Dup
);
8692 temp
= new LocalTemporary (Type
);
8695 } else if (leave_copy
) {
8696 temp
= new LocalTemporary (Type
);
8703 arguments
.Add (new Argument (value));
8705 Invocation
.EmitCall (ec
, is_base_indexer
, instance_expr
, set, arguments
, loc
, false, prepared
);
8713 public override string GetSignatureForError ()
8715 return TypeManager
.CSharpSignature (get != null ? get.MetaInfo
: set.MetaInfo
, false);
8719 public SLE
.Expression
MakeAssignExpression (BuilderContext ctx
)
8721 var value = new[] { set_expr.MakeExpression (ctx) }
;
8722 var args
= Arguments
.MakeExpression (arguments
, ctx
).Concat (value);
8724 return SLE
.Expression
.Block (
8725 SLE
.Expression
.Call (instance_expr
.MakeExpression (ctx
), (MethodInfo
) set.MetaInfo
, args
),
8730 public override SLE
.Expression
MakeExpression (BuilderContext ctx
)
8732 var args
= Arguments
.MakeExpression (arguments
, ctx
);
8733 return SLE
.Expression
.Call (instance_expr
.MakeExpression (ctx
), (MethodInfo
) get.MetaInfo
, args
);
8736 public override void MutateHoistedGenericType (AnonymousMethodStorey storey
)
8739 storey
.MutateGenericMethod (get);
8741 storey
.MutateGenericMethod (set);
8743 instance_expr
.MutateHoistedGenericType (storey
);
8744 if (arguments
!= null)
8745 arguments
.MutateHoistedGenericType (storey
);
8747 type
= storey
.MutateType (type
);
8750 protected override void CloneTo (CloneContext clonectx
, Expression t
)
8752 IndexerAccess target
= (IndexerAccess
) t
;
8754 if (arguments
!= null)
8755 target
.arguments
= arguments
.Clone (clonectx
);
8757 if (instance_expr
!= null)
8758 target
.instance_expr
= instance_expr
.Clone (clonectx
);
8763 /// The base operator for method names
8765 public class BaseAccess
: Expression
{
8766 public readonly string Identifier
;
8769 public BaseAccess (string member
, Location l
)
8771 this.Identifier
= member
;
8775 public BaseAccess (string member
, TypeArguments args
, Location l
)
8781 public override Expression
CreateExpressionTree (ResolveContext ec
)
8783 throw new NotSupportedException ("ET");
8786 protected override Expression
DoResolve (ResolveContext ec
)
8788 Expression c
= CommonResolve (ec
);
8794 // MethodGroups use this opportunity to flag an error on lacking ()
8796 if (!(c
is MethodGroupExpr
))
8797 return c
.Resolve (ec
);
8801 public override Expression
DoResolveLValue (ResolveContext ec
, Expression right_side
)
8803 Expression c
= CommonResolve (ec
);
8809 // MethodGroups use this opportunity to flag an error on lacking ()
8811 if (! (c
is MethodGroupExpr
))
8812 return c
.DoResolveLValue (ec
, right_side
);
8817 Expression
CommonResolve (ResolveContext ec
)
8819 Expression member_lookup
;
8820 Type current_type
= ec
.CurrentType
;
8821 Type base_type
= current_type
.BaseType
;
8823 if (!This
.IsThisAvailable (ec
)) {
8825 ec
.Report
.Error (1511, loc
, "Keyword `base' is not available in a static method");
8827 ec
.Report
.Error (1512, loc
, "Keyword `base' is not available in the current context");
8832 member_lookup
= MemberLookup (ec
.Compiler
, ec
.CurrentType
, null, base_type
, Identifier
,
8833 AllMemberTypes
, AllBindingFlags
, loc
);
8834 if (member_lookup
== null) {
8835 Error_MemberLookupFailed (ec
, ec
.CurrentType
, base_type
, base_type
, Identifier
,
8836 null, AllMemberTypes
, AllBindingFlags
);
8843 left
= new TypeExpression (base_type
, loc
);
8845 left
= ec
.GetThis (loc
);
8847 MemberExpr me
= member_lookup
as MemberExpr
;
8849 if (member_lookup
is TypeExpression
){
8850 ec
.Report
.Error (582, loc
, "{0}: Can not reference a type through an expression, try `{1}' instead",
8851 Identifier
, member_lookup
.GetSignatureForError ());
8853 ec
.Report
.Error (582, loc
, "{0}: Can not reference a {1} through an expression",
8854 Identifier
, member_lookup
.ExprClassName
);
8860 me
= me
.ResolveMemberAccess (ec
, left
, loc
, null);
8867 me
.SetTypeArguments (ec
, args
);
8873 public override void Emit (EmitContext ec
)
8875 throw new Exception ("Should never be called");
8878 protected override void CloneTo (CloneContext clonectx
, Expression t
)
8880 BaseAccess target
= (BaseAccess
) t
;
8883 target
.args
= args
.Clone ();
8888 /// The base indexer operator
8890 public class BaseIndexerAccess
: IndexerAccess
{
8891 public BaseIndexerAccess (Arguments args
, Location loc
)
8892 : base (null, true, loc
)
8894 this.arguments
= args
;
8897 protected override void CommonResolve (ResolveContext ec
)
8899 instance_expr
= ec
.GetThis (loc
);
8901 current_type
= ec
.CurrentType
.BaseType
;
8902 indexer_type
= current_type
;
8905 public override Expression
CreateExpressionTree (ResolveContext ec
)
8907 MemberExpr
.Error_BaseAccessInExpressionTree (ec
, loc
);
8908 return base.CreateExpressionTree (ec
);
8913 /// This class exists solely to pass the Type around and to be a dummy
8914 /// that can be passed to the conversion functions (this is used by
8915 /// foreach implementation to typecast the object return value from
8916 /// get_Current into the proper type. All code has been generated and
8917 /// we only care about the side effect conversions to be performed
8919 /// This is also now used as a placeholder where a no-action expression
8920 /// is needed (the `New' class).
8922 public class EmptyExpression
: Expression
{
8923 public static readonly Expression Null
= new EmptyExpression ();
8925 public class OutAccess
: EmptyExpression
8927 public static readonly OutAccess Instance
= new OutAccess ();
8929 public override Expression
DoResolveLValue (ResolveContext rc
, Expression right_side
)
8931 rc
.Report
.Error (206, right_side
.Location
,
8932 "A property, indexer or dynamic member access may not be passed as `ref' or `out' parameter");
8938 public static readonly EmptyExpression LValueMemberAccess
= new EmptyExpression ();
8939 public static readonly EmptyExpression LValueMemberOutAccess
= new EmptyExpression ();
8940 public static readonly EmptyExpression UnaryAddress
= new EmptyExpression ();
8942 static EmptyExpression temp
= new EmptyExpression ();
8943 public static EmptyExpression
Grab ()
8945 EmptyExpression retval
= temp
== null ? new EmptyExpression () : temp
;
8950 public static void Release (EmptyExpression e
)
8957 // FIXME: Don't set to object
8958 type
= TypeManager
.object_type
;
8959 eclass
= ExprClass
.Value
;
8960 loc
= Location
.Null
;
8963 public EmptyExpression (Type t
)
8966 eclass
= ExprClass
.Value
;
8967 loc
= Location
.Null
;
8970 public override Expression
CreateExpressionTree (ResolveContext ec
)
8972 throw new NotSupportedException ("ET");
8975 protected override Expression
DoResolve (ResolveContext ec
)
8980 public override void Emit (EmitContext ec
)
8982 // nothing, as we only exist to not do anything.
8985 public override void EmitSideEffect (EmitContext ec
)
8990 // This is just because we might want to reuse this bad boy
8991 // instead of creating gazillions of EmptyExpressions.
8992 // (CanImplicitConversion uses it)
8994 public void SetType (Type t
)
9001 // Empty statement expression
9003 public sealed class EmptyExpressionStatement
: ExpressionStatement
9005 public static readonly EmptyExpressionStatement Instance
= new EmptyExpressionStatement ();
9007 private EmptyExpressionStatement ()
9009 loc
= Location
.Null
;
9012 public override Expression
CreateExpressionTree (ResolveContext ec
)
9017 public override void EmitStatement (EmitContext ec
)
9022 protected override Expression
DoResolve (ResolveContext ec
)
9024 eclass
= ExprClass
.Value
;
9025 type
= TypeManager
.object_type
;
9029 public override void Emit (EmitContext ec
)
9035 public class UserCast
: Expression
{
9039 public UserCast (MethodSpec method
, Expression source
, Location l
)
9041 this.method
= method
;
9042 this.source
= source
;
9043 type
= TypeManager
.TypeToCoreType (method
.ReturnType
);
9047 public Expression Source
{
9053 public override Expression
CreateExpressionTree (ResolveContext ec
)
9055 Arguments args
= new Arguments (3);
9056 args
.Add (new Argument (source
.CreateExpressionTree (ec
)));
9057 args
.Add (new Argument (new TypeOf (new TypeExpression (type
, loc
), loc
)));
9058 args
.Add (new Argument (new TypeOfMethod (method
, loc
)));
9059 return CreateExpressionFactoryCall (ec
, "Convert", args
);
9062 protected override Expression
DoResolve (ResolveContext ec
)
9064 ObsoleteAttribute oa
= AttributeTester
.GetMethodObsoleteAttribute (method
.MetaInfo
);
9066 AttributeTester
.Report_ObsoleteMessage (oa
, GetSignatureForError (), loc
, ec
.Report
);
9068 eclass
= ExprClass
.Value
;
9072 public override void Emit (EmitContext ec
)
9075 ec
.ig
.Emit (OpCodes
.Call
, (MethodInfo
) method
.MetaInfo
);
9078 public override string GetSignatureForError ()
9080 return TypeManager
.CSharpSignature (method
.MetaInfo
);
9083 public override SLE
.Expression
MakeExpression (BuilderContext ctx
)
9085 return SLE
.Expression
.Convert (source
.MakeExpression (ctx
), type
, (MethodInfo
) method
.MetaInfo
);
9088 public override void MutateHoistedGenericType (AnonymousMethodStorey storey
)
9090 source
.MutateHoistedGenericType (storey
);
9091 storey
.MutateGenericMethod (method
);
9096 // This class is used to "construct" the type during a typecast
9097 // operation. Since the Type.GetType class in .NET can parse
9098 // the type specification, we just use this to construct the type
9099 // one bit at a time.
9101 public class ComposedCast
: TypeExpr
{
9102 FullNamedExpression left
;
9105 public ComposedCast (FullNamedExpression left
, string dim
)
9106 : this (left
, dim
, left
.Location
)
9110 public ComposedCast (FullNamedExpression left
, string dim
, Location l
)
9117 protected override TypeExpr
DoResolveAsTypeStep (IMemberContext ec
)
9119 TypeExpr lexpr
= left
.ResolveAsTypeTerminal (ec
, false);
9123 Type ltype
= lexpr
.Type
;
9124 if ((dim
.Length
> 0) && (dim
[0] == '?')) {
9125 TypeExpr nullable
= new Nullable
.NullableType (lexpr
, loc
);
9127 nullable
= new ComposedCast (nullable
, dim
.Substring (1), loc
);
9128 return nullable
.ResolveAsTypeTerminal (ec
, false);
9131 if (dim
== "*" && !TypeManager
.VerifyUnmanaged (ec
.Compiler
, ltype
, loc
))
9134 if (dim
.Length
!= 0 && dim
[0] == '[') {
9135 if (TypeManager
.IsSpecialType (ltype
)) {
9136 ec
.Compiler
.Report
.Error (611, loc
, "Array elements cannot be of type `{0}'", TypeManager
.CSharpName (ltype
));
9140 if ((ltype
.Attributes
& Class
.StaticClassAttribute
) == Class
.StaticClassAttribute
) {
9141 ec
.Compiler
.Report
.SymbolRelatedToPreviousError (ltype
);
9142 ec
.Compiler
.Report
.Error (719, loc
, "Array elements cannot be of static type `{0}'",
9143 TypeManager
.CSharpName (ltype
));
9148 type
= TypeManager
.GetConstructedType (ltype
, dim
);
9153 throw new InternalErrorException ("Couldn't create computed type " + ltype
+ dim
);
9155 if (type
.IsPointer
&& !ec
.IsUnsafe
){
9156 UnsafeError (ec
.Compiler
.Report
, loc
);
9159 eclass
= ExprClass
.Type
;
9163 public override string GetSignatureForError ()
9165 return left
.GetSignatureForError () + dim
;
9168 public override TypeExpr
ResolveAsTypeTerminal (IMemberContext ec
, bool silent
)
9170 return ResolveAsBaseTerminal (ec
, silent
);
9174 public class FixedBufferPtr
: Expression
{
9177 public FixedBufferPtr (Expression array
, Type array_type
, Location l
)
9182 type
= TypeManager
.GetPointerType (array_type
);
9183 eclass
= ExprClass
.Value
;
9186 public override Expression
CreateExpressionTree (ResolveContext ec
)
9188 Error_PointerInsideExpressionTree (ec
);
9192 public override void Emit(EmitContext ec
)
9197 protected override Expression
DoResolve (ResolveContext ec
)
9200 // We are born fully resolved
9208 // This class is used to represent the address of an array, used
9209 // only by the Fixed statement, this generates "&a [0]" construct
9210 // for fixed (char *pa = a)
9212 public class ArrayPtr
: FixedBufferPtr
{
9215 public ArrayPtr (Expression array
, Type array_type
, Location l
):
9216 base (array
, array_type
, l
)
9218 this.array_type
= array_type
;
9221 public override void Emit (EmitContext ec
)
9225 ILGenerator ig
= ec
.ig
;
9226 IntLiteral
.EmitInt (ig
, 0);
9227 ig
.Emit (OpCodes
.Ldelema
, array_type
);
9232 // Encapsulates a conversion rules required for array indexes
9234 public class ArrayIndexCast
: TypeCast
9236 public ArrayIndexCast (Expression expr
)
9237 : base (expr
, TypeManager
.int32_type
)
9239 if (expr
.Type
== TypeManager
.int32_type
)
9240 throw new ArgumentException ("unnecessary array index conversion");
9243 public override Expression
CreateExpressionTree (ResolveContext ec
)
9245 using (ec
.Set (ResolveContext
.Options
.CheckedScope
)) {
9246 return base.CreateExpressionTree (ec
);
9250 public override void Emit (EmitContext ec
)
9254 var expr_type
= child
.Type
;
9256 if (expr_type
== TypeManager
.uint32_type
)
9257 ec
.ig
.Emit (OpCodes
.Conv_U
);
9258 else if (expr_type
== TypeManager
.int64_type
)
9259 ec
.ig
.Emit (OpCodes
.Conv_Ovf_I
);
9260 else if (expr_type
== TypeManager
.uint64_type
)
9261 ec
.ig
.Emit (OpCodes
.Conv_Ovf_I_Un
);
9263 throw new InternalErrorException ("Cannot emit cast to unknown array element type", type
);
9266 public override bool GetAttributableValue (ResolveContext ec
, Type value_type
, out object value)
9268 return child
.GetAttributableValue (ec
, value_type
, out value);
9273 // Implements the `stackalloc' keyword
9275 public class StackAlloc
: Expression
{
9280 public StackAlloc (Expression type
, Expression count
, Location l
)
9287 public override Expression
CreateExpressionTree (ResolveContext ec
)
9289 throw new NotSupportedException ("ET");
9292 protected override Expression
DoResolve (ResolveContext ec
)
9294 count
= count
.Resolve (ec
);
9298 if (count
.Type
!= TypeManager
.uint32_type
){
9299 count
= Convert
.ImplicitConversionRequired (ec
, count
, TypeManager
.int32_type
, loc
);
9304 Constant c
= count
as Constant
;
9305 if (c
!= null && c
.IsNegative
) {
9306 ec
.Report
.Error (247, loc
, "Cannot use a negative size with stackalloc");
9309 if (ec
.HasAny (ResolveContext
.Options
.CatchScope
| ResolveContext
.Options
.FinallyScope
)) {
9310 ec
.Report
.Error (255, loc
, "Cannot use stackalloc in finally or catch");
9313 TypeExpr texpr
= t
.ResolveAsTypeTerminal (ec
, false);
9319 if (!TypeManager
.VerifyUnmanaged (ec
.Compiler
, otype
, loc
))
9322 type
= TypeManager
.GetPointerType (otype
);
9323 eclass
= ExprClass
.Value
;
9328 public override void Emit (EmitContext ec
)
9330 int size
= GetTypeSize (otype
);
9331 ILGenerator ig
= ec
.ig
;
9336 ig
.Emit (OpCodes
.Sizeof
, otype
);
9338 IntConstant
.EmitInt (ig
, size
);
9340 ig
.Emit (OpCodes
.Mul_Ovf_Un
);
9341 ig
.Emit (OpCodes
.Localloc
);
9344 protected override void CloneTo (CloneContext clonectx
, Expression t
)
9346 StackAlloc target
= (StackAlloc
) t
;
9347 target
.count
= count
.Clone (clonectx
);
9348 target
.t
= t
.Clone (clonectx
);
9353 // An object initializer expression
9355 public class ElementInitializer
: Assign
9357 public readonly string Name
;
9359 public ElementInitializer (string name
, Expression initializer
, Location loc
)
9360 : base (null, initializer
, loc
)
9365 protected override void CloneTo (CloneContext clonectx
, Expression t
)
9367 ElementInitializer target
= (ElementInitializer
) t
;
9368 target
.source
= source
.Clone (clonectx
);
9371 public override Expression
CreateExpressionTree (ResolveContext ec
)
9373 Arguments args
= new Arguments (2);
9374 FieldExpr fe
= target
as FieldExpr
;
9376 args
.Add (new Argument (fe
.CreateTypeOfExpression ()));
9378 args
.Add (new Argument (((PropertyExpr
)target
).CreateSetterTypeOfExpression ()));
9380 args
.Add (new Argument (source
.CreateExpressionTree (ec
)));
9381 return CreateExpressionFactoryCall (ec
,
9382 source
is CollectionOrObjectInitializers
? "ListBind" : "Bind",
9386 protected override Expression
DoResolve (ResolveContext ec
)
9389 return EmptyExpressionStatement
.Instance
;
9391 MemberExpr me
= MemberLookupFinal (ec
, ec
.CurrentInitializerVariable
.Type
, ec
.CurrentInitializerVariable
.Type
,
9392 Name
, MemberTypes
.Field
| MemberTypes
.Property
, BindingFlags
.Public
| BindingFlags
.Instance
, loc
) as MemberExpr
;
9398 me
.InstanceExpression
= ec
.CurrentInitializerVariable
;
9400 if (source
is CollectionOrObjectInitializers
) {
9401 Expression previous
= ec
.CurrentInitializerVariable
;
9402 ec
.CurrentInitializerVariable
= target
;
9403 source
= source
.Resolve (ec
);
9404 ec
.CurrentInitializerVariable
= previous
;
9408 eclass
= source
.eclass
;
9413 Expression expr
= base.DoResolve (ec
);
9418 // Ignore field initializers with default value
9420 Constant c
= source
as Constant
;
9421 if (c
!= null && c
.IsDefaultInitializer (type
) && target
.eclass
== ExprClass
.Variable
)
9422 return EmptyExpressionStatement
.Instance
.Resolve (ec
);
9427 protected override Expression
Error_MemberLookupFailed (ResolveContext ec
, Type type
, MemberInfo
[] members
)
9429 MemberInfo member
= members
[0];
9430 if (member
.MemberType
!= MemberTypes
.Property
&& member
.MemberType
!= MemberTypes
.Field
)
9431 ec
.Report
.Error (1913, loc
, "Member `{0}' cannot be initialized. An object " +
9432 "initializer may only be used for fields, or properties", TypeManager
.GetFullNameSignature (member
));
9434 ec
.Report
.Error (1914, loc
, " Static field or property `{0}' cannot be assigned in an object initializer",
9435 TypeManager
.GetFullNameSignature (member
));
9440 public override void EmitStatement (EmitContext ec
)
9442 if (source
is CollectionOrObjectInitializers
)
9445 base.EmitStatement (ec
);
9450 // A collection initializer expression
9452 class CollectionElementInitializer
: Invocation
9454 public class ElementInitializerArgument
: Argument
9456 public ElementInitializerArgument (Expression e
)
9462 sealed class AddMemberAccess
: MemberAccess
9464 public AddMemberAccess (Expression expr
, Location loc
)
9465 : base (expr
, "Add", loc
)
9469 protected override void Error_TypeDoesNotContainDefinition (ResolveContext ec
, Type type
, string name
)
9471 if (TypeManager
.HasElementType (type
))
9474 base.Error_TypeDoesNotContainDefinition (ec
, type
, name
);
9478 public CollectionElementInitializer (Expression argument
)
9479 : base (null, new Arguments (1))
9481 base.arguments
.Add (new ElementInitializerArgument (argument
));
9482 this.loc
= argument
.Location
;
9485 public CollectionElementInitializer (List
<Expression
> arguments
, Location loc
)
9486 : base (null, new Arguments (arguments
.Count
))
9488 foreach (Expression e
in arguments
)
9489 base.arguments
.Add (new ElementInitializerArgument (e
));
9494 public override Expression
CreateExpressionTree (ResolveContext ec
)
9496 Arguments args
= new Arguments (2);
9497 args
.Add (new Argument (mg
.CreateExpressionTree (ec
)));
9499 var expr_initializers
= new ArrayInitializer (arguments
.Count
, loc
);
9500 foreach (Argument a
in arguments
)
9501 expr_initializers
.Add (a
.CreateExpressionTree (ec
));
9503 args
.Add (new Argument (new ArrayCreation (
9504 CreateExpressionTypeExpression (ec
, loc
), "[]", expr_initializers
, loc
)));
9505 return CreateExpressionFactoryCall (ec
, "ElementInit", args
);
9508 protected override void CloneTo (CloneContext clonectx
, Expression t
)
9510 CollectionElementInitializer target
= (CollectionElementInitializer
) t
;
9511 if (arguments
!= null)
9512 target
.arguments
= arguments
.Clone (clonectx
);
9515 protected override Expression
DoResolve (ResolveContext ec
)
9517 base.expr
= new AddMemberAccess (ec
.CurrentInitializerVariable
, loc
);
9519 return base.DoResolve (ec
);
9524 // A block of object or collection initializers
9526 public class CollectionOrObjectInitializers
: ExpressionStatement
9528 IList
<Expression
> initializers
;
9529 bool is_collection_initialization
;
9531 public static readonly CollectionOrObjectInitializers Empty
=
9532 new CollectionOrObjectInitializers (Array
.AsReadOnly (new Expression
[0]), Location
.Null
);
9534 public CollectionOrObjectInitializers (IList
<Expression
> initializers
, Location loc
)
9536 this.initializers
= initializers
;
9540 public bool IsEmpty
{
9542 return initializers
.Count
== 0;
9546 public bool IsCollectionInitializer
{
9548 return is_collection_initialization
;
9552 protected override void CloneTo (CloneContext clonectx
, Expression target
)
9554 CollectionOrObjectInitializers t
= (CollectionOrObjectInitializers
) target
;
9556 t
.initializers
= new List
<Expression
> (initializers
.Count
);
9557 foreach (var e
in initializers
)
9558 t
.initializers
.Add (e
.Clone (clonectx
));
9561 public override Expression
CreateExpressionTree (ResolveContext ec
)
9563 var expr_initializers
= new ArrayInitializer (initializers
.Count
, loc
);
9564 foreach (Expression e
in initializers
) {
9565 Expression expr
= e
.CreateExpressionTree (ec
);
9567 expr_initializers
.Add (expr
);
9570 return new ImplicitlyTypedArrayCreation ("[]", expr_initializers
, loc
);
9573 protected override Expression
DoResolve (ResolveContext ec
)
9575 List
<string> element_names
= null;
9576 for (int i
= 0; i
< initializers
.Count
; ++i
) {
9577 Expression initializer
= (Expression
) initializers
[i
];
9578 ElementInitializer element_initializer
= initializer
as ElementInitializer
;
9581 if (element_initializer
!= null) {
9582 element_names
= new List
<string> (initializers
.Count
);
9583 element_names
.Add (element_initializer
.Name
);
9584 } else if (initializer
is CompletingExpression
){
9585 initializer
.Resolve (ec
);
9586 throw new InternalErrorException ("This line should never be reached");
9588 if (!TypeManager
.ImplementsInterface (ec
.CurrentInitializerVariable
.Type
, TypeManager
.ienumerable_type
)) {
9589 ec
.Report
.Error (1922, loc
, "A field or property `{0}' cannot be initialized with a collection " +
9590 "object initializer because type `{1}' does not implement `{2}' interface",
9591 ec
.CurrentInitializerVariable
.GetSignatureForError (),
9592 TypeManager
.CSharpName (ec
.CurrentInitializerVariable
.Type
),
9593 TypeManager
.CSharpName (TypeManager
.ienumerable_type
));
9596 is_collection_initialization
= true;
9599 if (is_collection_initialization
!= (element_initializer
== null)) {
9600 ec
.Report
.Error (747, initializer
.Location
, "Inconsistent `{0}' member declaration",
9601 is_collection_initialization
? "collection initializer" : "object initializer");
9605 if (!is_collection_initialization
) {
9606 if (element_names
.Contains (element_initializer
.Name
)) {
9607 ec
.Report
.Error (1912, element_initializer
.Location
,
9608 "An object initializer includes more than one member `{0}' initialization",
9609 element_initializer
.Name
);
9611 element_names
.Add (element_initializer
.Name
);
9616 Expression e
= initializer
.Resolve (ec
);
9617 if (e
== EmptyExpressionStatement
.Instance
)
9618 initializers
.RemoveAt (i
--);
9620 initializers
[i
] = e
;
9623 type
= ec
.CurrentInitializerVariable
.Type
;
9624 if (is_collection_initialization
) {
9625 if (TypeManager
.HasElementType (type
)) {
9626 ec
.Report
.Error (1925, loc
, "Cannot initialize object of type `{0}' with a collection initializer",
9627 TypeManager
.CSharpName (type
));
9631 eclass
= ExprClass
.Variable
;
9635 public override void Emit (EmitContext ec
)
9640 public override void EmitStatement (EmitContext ec
)
9642 foreach (ExpressionStatement e
in initializers
)
9643 e
.EmitStatement (ec
);
9646 public override void MutateHoistedGenericType (AnonymousMethodStorey storey
)
9648 foreach (Expression e
in initializers
)
9649 e
.MutateHoistedGenericType (storey
);
9654 // New expression with element/object initializers
9656 public class NewInitialize
: New
9659 // This class serves as a proxy for variable initializer target instances.
9660 // A real variable is assigned later when we resolve left side of an
9663 sealed class InitializerTargetExpression
: Expression
, IMemoryLocation
9665 NewInitialize new_instance
;
9667 public InitializerTargetExpression (NewInitialize newInstance
)
9669 this.type
= newInstance
.type
;
9670 this.loc
= newInstance
.loc
;
9671 this.eclass
= newInstance
.eclass
;
9672 this.new_instance
= newInstance
;
9675 public override Expression
CreateExpressionTree (ResolveContext ec
)
9677 // Should not be reached
9678 throw new NotSupportedException ("ET");
9681 protected override Expression
DoResolve (ResolveContext ec
)
9686 public override Expression
DoResolveLValue (ResolveContext ec
, Expression right_side
)
9691 public override void Emit (EmitContext ec
)
9693 Expression e
= (Expression
) new_instance
.instance
;
9697 #region IMemoryLocation Members
9699 public void AddressOf (EmitContext ec
, AddressOp mode
)
9701 new_instance
.instance
.AddressOf (ec
, mode
);
9707 CollectionOrObjectInitializers initializers
;
9708 IMemoryLocation instance
;
9710 public NewInitialize (Expression requested_type
, Arguments arguments
, CollectionOrObjectInitializers initializers
, Location l
)
9711 : base (requested_type
, arguments
, l
)
9713 this.initializers
= initializers
;
9716 protected override IMemoryLocation
EmitAddressOf (EmitContext ec
, AddressOp Mode
)
9718 instance
= base.EmitAddressOf (ec
, Mode
);
9720 if (!initializers
.IsEmpty
)
9721 initializers
.Emit (ec
);
9726 protected override void CloneTo (CloneContext clonectx
, Expression t
)
9728 base.CloneTo (clonectx
, t
);
9730 NewInitialize target
= (NewInitialize
) t
;
9731 target
.initializers
= (CollectionOrObjectInitializers
) initializers
.Clone (clonectx
);
9734 public override Expression
CreateExpressionTree (ResolveContext ec
)
9736 Arguments args
= new Arguments (2);
9737 args
.Add (new Argument (base.CreateExpressionTree (ec
)));
9738 if (!initializers
.IsEmpty
)
9739 args
.Add (new Argument (initializers
.CreateExpressionTree (ec
)));
9741 return CreateExpressionFactoryCall (ec
,
9742 initializers
.IsCollectionInitializer
? "ListInit" : "MemberInit",
9746 protected override Expression
DoResolve (ResolveContext ec
)
9748 Expression e
= base.DoResolve (ec
);
9752 Expression previous
= ec
.CurrentInitializerVariable
;
9753 ec
.CurrentInitializerVariable
= new InitializerTargetExpression (this);
9754 initializers
.Resolve (ec
);
9755 ec
.CurrentInitializerVariable
= previous
;
9759 public override bool Emit (EmitContext ec
, IMemoryLocation target
)
9761 bool left_on_stack
= base.Emit (ec
, target
);
9763 if (initializers
.IsEmpty
)
9764 return left_on_stack
;
9766 LocalTemporary temp
= target
as LocalTemporary
;
9768 if (!left_on_stack
) {
9769 VariableReference vr
= target
as VariableReference
;
9771 // FIXME: This still does not work correctly for pre-set variables
9772 if (vr
!= null && vr
.IsRef
)
9773 target
.AddressOf (ec
, AddressOp
.Load
);
9775 ((Expression
) target
).Emit (ec
);
9776 left_on_stack
= true;
9779 temp
= new LocalTemporary (type
);
9786 initializers
.Emit (ec
);
9788 if (left_on_stack
) {
9793 return left_on_stack
;
9796 public override bool HasInitializer
{
9798 return !initializers
.IsEmpty
;
9802 public override void MutateHoistedGenericType (AnonymousMethodStorey storey
)
9804 base.MutateHoistedGenericType (storey
);
9805 initializers
.MutateHoistedGenericType (storey
);
9809 public class NewAnonymousType
: New
9811 static readonly IList
<AnonymousTypeParameter
> EmptyParameters
= Array
.AsReadOnly (new AnonymousTypeParameter
[0]);
9813 List
<AnonymousTypeParameter
> parameters
;
9814 readonly TypeContainer parent
;
9815 AnonymousTypeClass anonymous_type
;
9817 public NewAnonymousType (List
<AnonymousTypeParameter
> parameters
, TypeContainer parent
, Location loc
)
9818 : base (null, null, loc
)
9820 this.parameters
= parameters
;
9821 this.parent
= parent
;
9824 protected override void CloneTo (CloneContext clonectx
, Expression target
)
9826 if (parameters
== null)
9829 NewAnonymousType t
= (NewAnonymousType
) target
;
9830 t
.parameters
= new List
<AnonymousTypeParameter
> (parameters
.Count
);
9831 foreach (AnonymousTypeParameter atp
in parameters
)
9832 t
.parameters
.Add ((AnonymousTypeParameter
) atp
.Clone (clonectx
));
9835 AnonymousTypeClass
CreateAnonymousType (ResolveContext ec
, IList
<AnonymousTypeParameter
> parameters
)
9837 AnonymousTypeClass type
= parent
.Module
.Compiled
.GetAnonymousType (parameters
);
9841 type
= AnonymousTypeClass
.Create (ec
.Compiler
, parent
, parameters
, loc
);
9848 if (ec
.Report
.Errors
== 0)
9851 parent
.Module
.Compiled
.AddAnonymousType (type
);
9855 public override Expression
CreateExpressionTree (ResolveContext ec
)
9857 if (parameters
== null)
9858 return base.CreateExpressionTree (ec
);
9860 var init
= new ArrayInitializer (parameters
.Count
, loc
);
9861 foreach (Property p
in anonymous_type
.Properties
)
9862 init
.Add (new TypeOfMethod (Import
.CreateMethod (TypeBuilder
.GetMethod (type
, p
.GetBuilder
)), loc
));
9864 var ctor_args
= new ArrayInitializer (Arguments
.Count
, loc
);
9865 foreach (Argument a
in Arguments
)
9866 ctor_args
.Add (a
.CreateExpressionTree (ec
));
9868 Arguments args
= new Arguments (3);
9869 args
.Add (new Argument (method
.CreateExpressionTree (ec
)));
9870 args
.Add (new Argument (new ArrayCreation (TypeManager
.expression_type_expr
, "[]", ctor_args
, loc
)));
9871 args
.Add (new Argument (new ImplicitlyTypedArrayCreation ("[]", init
, loc
)));
9873 return CreateExpressionFactoryCall (ec
, "New", args
);
9876 protected override Expression
DoResolve (ResolveContext ec
)
9878 if (ec
.HasSet (ResolveContext
.Options
.ConstantScope
)) {
9879 ec
.Report
.Error (836, loc
, "Anonymous types cannot be used in this expression");
9883 if (parameters
== null) {
9884 anonymous_type
= CreateAnonymousType (ec
, EmptyParameters
);
9885 RequestedType
= new TypeExpression (anonymous_type
.TypeBuilder
, loc
);
9886 return base.DoResolve (ec
);
9890 Arguments
= new Arguments (parameters
.Count
);
9891 TypeExpression
[] t_args
= new TypeExpression
[parameters
.Count
];
9892 for (int i
= 0; i
< parameters
.Count
; ++i
) {
9893 Expression e
= ((AnonymousTypeParameter
) parameters
[i
]).Resolve (ec
);
9899 Arguments
.Add (new Argument (e
));
9900 t_args
[i
] = new TypeExpression (e
.Type
, e
.Location
);
9906 anonymous_type
= CreateAnonymousType (ec
, parameters
);
9907 if (anonymous_type
== null)
9910 RequestedType
= new GenericTypeExpr (anonymous_type
.TypeBuilder
, new TypeArguments (t_args
), loc
);
9911 return base.DoResolve (ec
);
9915 public class AnonymousTypeParameter
: ShimExpression
9917 public readonly string Name
;
9919 public AnonymousTypeParameter (Expression initializer
, string name
, Location loc
)
9920 : base (initializer
)
9926 public AnonymousTypeParameter (Parameter parameter
)
9927 : base (new SimpleName (parameter
.Name
, parameter
.Location
))
9929 this.Name
= parameter
.Name
;
9930 this.loc
= parameter
.Location
;
9933 public override bool Equals (object o
)
9935 AnonymousTypeParameter other
= o
as AnonymousTypeParameter
;
9936 return other
!= null && Name
== other
.Name
;
9939 public override int GetHashCode ()
9941 return Name
.GetHashCode ();
9944 protected override Expression
DoResolve (ResolveContext ec
)
9946 Expression e
= expr
.Resolve (ec
);
9950 if (e
.eclass
== ExprClass
.MethodGroup
) {
9951 Error_InvalidInitializer (ec
, e
.ExprClassName
);
9956 if (type
== TypeManager
.void_type
|| type
== TypeManager
.null_type
||
9957 type
== InternalType
.AnonymousMethod
|| type
.IsPointer
) {
9958 Error_InvalidInitializer (ec
, e
.GetSignatureForError ());
9965 protected virtual void Error_InvalidInitializer (ResolveContext ec
, string initializer
)
9967 ec
.Report
.Error (828, loc
, "An anonymous type property `{0}' cannot be initialized with `{1}'",