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2009-12-09 Jb Evain <jbevain@novell.com>
[mcs.git] / mcs / typemanager.cs
blobe1977d9e0e7d91194ed5cf54798e19c65c68e622
1 //
2 // typemanager.cs: C# type manager
3 //
4 // Author: Miguel de Icaza (miguel@gnu.org)
5 // Ravi Pratap (ravi@ximian.com)
6 // Marek Safar (marek.safar@seznam.cz)
7 //
8 // Dual licensed under the terms of the MIT X11 or GNU GPL
9 //
10 // Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
11 // Copyright 2003-2008 Novell, Inc.
12 //
13
14 //
15 // We will eventually remove the SIMPLE_SPEEDUP, and should never change
16 // the behavior of the compilation. This can be removed if we rework
17 // the code to get a list of namespaces available.
18 //
19 #define SIMPLE_SPEEDUP
20
21 using System;
22 using System.IO;
23 using System.Globalization;
24 using System.Collections.Generic;
25 using System.Reflection;
26 using System.Reflection.Emit;
27 using System.Text;
28 using System.Runtime.CompilerServices;
29 using System.Diagnostics;
30
31 namespace Mono.CSharp {
32
33 partial class TypeManager {
34 //
35 // A list of core types that the compiler requires or uses
36 //
37 static public Type object_type;
38 static public Type value_type;
39 static public Type string_type;
40 static public Type int32_type;
41 static public Type uint32_type;
42 static public Type int64_type;
43 static public Type uint64_type;
44 static public Type float_type;
45 static public Type double_type;
46 static public Type char_type;
47 static public Type short_type;
48 static public Type decimal_type;
49 static public Type bool_type;
50 static public Type sbyte_type;
51 static public Type byte_type;
52 static public Type ushort_type;
53 static public Type enum_type;
54 static public Type delegate_type;
55 static public Type multicast_delegate_type;
56 static public Type void_type;
57 static public Type null_type;
58 static public Type array_type;
59 static public Type runtime_handle_type;
60 static public Type type_type;
61 static public Type ienumerator_type;
62 static public Type ienumerable_type;
63 static public Type idisposable_type;
64 static public Type iasyncresult_type;
65 static public Type asynccallback_type;
66 static public Type intptr_type;
67 static public Type uintptr_type;
68 static public Type runtime_field_handle_type;
69 static public Type runtime_argument_handle_type;
70 static public Type attribute_type;
71 static public Type void_ptr_type;
72 static public Type exception_type;
73
74 static public Type typed_reference_type;
75 static public Type arg_iterator_type;
76 static public Type mbr_type;
77 public static Type runtime_helpers_type;
78
79 //
80 // C# 2.0
81 //
82 static internal Type isvolatile_type;
83 static public Type generic_ilist_type;
84 static public Type generic_icollection_type;
85 static public Type generic_ienumerator_type;
86 static public Type generic_ienumerable_type;
87 static public Type generic_nullable_type;
88
89 //
90 // C# 3.0
91 //
92 static internal Type expression_type;
93 public static Type parameter_expression_type;
94 public static Type fieldinfo_type;
95 public static Type methodinfo_type;
96 public static Type ctorinfo_type;
97
98 //
99 // C# 4.0
100 //
101 public static Type call_site_type;
102 public static Type generic_call_site_type;
103 public static TypeExpr binder_type;
104 public static Type binder_flags;
105
106 //
107 // Expressions representing the internal types. Used during declaration
108 // definition.
109 //
110 static public TypeExpr system_object_expr, system_string_expr;
111 static public TypeExpr system_boolean_expr, system_decimal_expr;
112 static public TypeExpr system_single_expr, system_double_expr;
113 static public TypeExpr system_sbyte_expr, system_byte_expr;
114 static public TypeExpr system_int16_expr, system_uint16_expr;
115 static public TypeExpr system_int32_expr, system_uint32_expr;
116 static public TypeExpr system_int64_expr, system_uint64_expr;
117 static public TypeExpr system_char_expr, system_void_expr;
118 static public TypeExpr system_valuetype_expr;
119 static public TypeExpr system_intptr_expr;
120 public static TypeExpr expression_type_expr;
121
122
123 //
124 // These methods are called by code generated by the compiler
125 //
126 static public FieldInfo string_empty;
127 static public MethodInfo system_type_get_type_from_handle;
128 static public MethodInfo bool_movenext_void;
129 static public MethodInfo void_dispose_void;
130 static public MethodInfo void_monitor_enter_object;
131 static public MethodInfo void_monitor_exit_object;
132 static public MethodInfo void_initializearray_array_fieldhandle;
133 static public MethodInfo delegate_combine_delegate_delegate;
134 static public MethodInfo delegate_remove_delegate_delegate;
135 static public PropertyInfo int_get_offset_to_string_data;
136 static public MethodInfo int_interlocked_compare_exchange;
137 static public PropertyInfo ienumerator_getcurrent;
138 public static MethodInfo methodbase_get_type_from_handle;
139 public static MethodInfo methodbase_get_type_from_handle_generic;
140 public static MethodInfo fieldinfo_get_field_from_handle;
141 public static MethodInfo fieldinfo_get_field_from_handle_generic;
142 static public MethodInfo activator_create_instance;
143
144 //
145 // The constructors.
146 //
147 static public ConstructorInfo void_decimal_ctor_five_args;
148 static public ConstructorInfo void_decimal_ctor_int_arg;
149 public static ConstructorInfo void_decimal_ctor_long_arg;
150
151 static Dictionary<TypeBuilder, DeclSpace> builder_to_declspace;
152
153 static Dictionary<Type, MemberCache> builder_to_member_cache;
154
155 // <remarks>
156 // Tracks the interfaces implemented by typebuilders. We only
157 // enter those who do implement or or more interfaces
158 // </remarks>
159 static Dictionary<Type, Type[]> builder_to_ifaces;
160
161 // <remarks>
162 // Maps a MethodBase to its ParameterData (either InternalParameters or ReflectionParameters)
163 // <remarks>
164 static Dictionary<MemberInfo, AParametersCollection> method_params;
165
166 // <remarks>
167 // A hash table from override methods to their base virtual method.
168 // <remarks>
169 static Dictionary<MethodBase, MethodBase> method_overrides;
170
171 // <remarks>
172 // Keeps track of methods
173 // </remarks>
174
175 static Dictionary<MethodBase, IMethodData> builder_to_method;
176
177 // <remarks>
178 // Contains all public types from referenced assemblies.
179 // This member is used only if CLS Compliance verification is required.
180 // </remarks>
181 public static Dictionary<string, object> AllClsTopLevelTypes;
182
183 static Dictionary<FieldInfo, FieldBase> fieldbuilders_to_fields;
184 static Dictionary<PropertyInfo, PropertyBase> propertybuilder_to_property;
185 static Dictionary<FieldInfo, IConstant> fields;
186 static Dictionary<EventInfo, EventField> events;
187 static Dictionary<Assembly, bool> assembly_internals_vis_attrs;
188 static Dictionary<GenericTypeParameterBuilder, TypeParameter> builder_to_type_param;
189 static Dictionary<Type, Type[]> iface_cache;
190
191 public static void CleanUp ()
192 {
193 // Lets get everything clean so that we can collect before generating code
194 builder_to_declspace = null;
195 builder_to_member_cache = null;
196 builder_to_ifaces = null;
197 builder_to_type_param = null;
198 method_params = null;
199 builder_to_method = null;
200 iface_cache = null;
201
202 fields = null;
203 events = null;
204 type_hash = null;
205 propertybuilder_to_property = null;
206
207 TypeHandle.CleanUp ();
208 }
209
210 //
211 // These are expressions that represent some of the internal data types, used
212 // elsewhere
213 //
214 static void InitExpressionTypes ()
215 {
216 system_object_expr = new TypeLookupExpression ("System", "Object");
217 system_string_expr = new TypeLookupExpression ("System", "String");
218 system_boolean_expr = new TypeLookupExpression ("System", "Boolean");
219 system_decimal_expr = new TypeLookupExpression ("System", "Decimal");
220 system_single_expr = new TypeLookupExpression ("System", "Single");
221 system_double_expr = new TypeLookupExpression ("System", "Double");
222 system_sbyte_expr = new TypeLookupExpression ("System", "SByte");
223 system_byte_expr = new TypeLookupExpression ("System", "Byte");
224 system_int16_expr = new TypeLookupExpression ("System", "Int16");
225 system_uint16_expr = new TypeLookupExpression ("System", "UInt16");
226 system_int32_expr = new TypeLookupExpression ("System", "Int32");
227 system_uint32_expr = new TypeLookupExpression ("System", "UInt32");
228 system_int64_expr = new TypeLookupExpression ("System", "Int64");
229 system_uint64_expr = new TypeLookupExpression ("System", "UInt64");
230 system_char_expr = new TypeLookupExpression ("System", "Char");
231 system_void_expr = new TypeLookupExpression ("System", "Void");
232 system_valuetype_expr = new TypeLookupExpression ("System", "ValueType");
233 system_intptr_expr = new TypeLookupExpression ("System", "IntPtr");
234 }
235
236 static TypeManager ()
237 {
238 Reset ();
239 }
240
241 static public void Reset ()
242 {
243 object_type = null;
244
245 InitExpressionTypes ();
246
247 builder_to_declspace = new Dictionary<TypeBuilder, DeclSpace> (ReferenceEquality<TypeBuilder>.Default);
248 builder_to_member_cache = new Dictionary<Type, MemberCache> (ReferenceEquality<Type>.Default);
249 builder_to_method = new Dictionary<MethodBase, IMethodData> (ReferenceEquality<MethodBase>.Default);
250 builder_to_type_param = new Dictionary<GenericTypeParameterBuilder, TypeParameter> (ReferenceEquality<GenericTypeParameterBuilder>.Default);
251 method_params = new Dictionary<MemberInfo, AParametersCollection> (ReferenceEquality<MemberInfo>.Default);
252 method_overrides = new Dictionary<MethodBase, MethodBase> (ReferenceEquality<MethodBase>.Default);
253 builder_to_ifaces = new Dictionary<Type, Type[]> (ReferenceEquality<Type>.Default);
254
255 fieldbuilders_to_fields = new Dictionary<FieldInfo, FieldBase> (ReferenceEquality<FieldInfo>.Default);
256 propertybuilder_to_property = new Dictionary<PropertyInfo, PropertyBase> (ReferenceEquality<PropertyInfo>.Default);
257 fields = new Dictionary<FieldInfo, IConstant> (ReferenceEquality<FieldInfo>.Default);
258 type_hash = new DoubleHash ();
259 assembly_internals_vis_attrs = new Dictionary<Assembly, bool> ();
260 iface_cache = new Dictionary<Type, Type[]> (ReferenceEquality<Type>.Default);
261
262 closure = new Closure ();
263 FilterWithClosure_delegate = new MemberFilter (closure.Filter);
264
265 // TODO: I am really bored by all this static stuff
266 system_type_get_type_from_handle =
267 bool_movenext_void =
268 void_dispose_void =
269 void_monitor_enter_object =
270 void_monitor_exit_object =
271 void_initializearray_array_fieldhandle =
272 delegate_combine_delegate_delegate =
273 delegate_remove_delegate_delegate =
274 int_interlocked_compare_exchange =
275 methodbase_get_type_from_handle =
276 methodbase_get_type_from_handle_generic =
277 fieldinfo_get_field_from_handle =
278 fieldinfo_get_field_from_handle_generic =
279 activator_create_instance = null;
280
281 int_get_offset_to_string_data =
282 ienumerator_getcurrent = null;
283
284 void_decimal_ctor_five_args =
285 void_decimal_ctor_int_arg =
286 void_decimal_ctor_long_arg = null;
287
288 isvolatile_type = null;
289
290 call_site_type =
291 generic_call_site_type =
292 binder_flags = null;
293
294 binder_type = null;
295
296 // to uncover regressions
297 AllClsTopLevelTypes = null;
298 }
299
300 public static void AddUserType (DeclSpace ds)
301 {
302 builder_to_declspace.Add (ds.TypeBuilder, ds);
303 }
304
305 //
306 // This entry point is used by types that we define under the covers
307 //
308 public static void RegisterBuilder (Type tb, Type [] ifaces)
309 {
310 if (ifaces != null)
311 builder_to_ifaces [tb] = ifaces;
312 }
313
314 public static void AddMethod (MethodBase builder, IMethodData method)
315 {
316 builder_to_method.Add (builder, method);
317 method_params.Add (builder, method.ParameterInfo);
318 }
319
320 public static IMethodData GetMethod (MethodBase builder)
321 {
322 IMethodData md;
323 if (builder_to_method.TryGetValue (builder, out md))
324 return md;
325 return null;
326 }
327
328 /// <summary>
329 /// Returns the DeclSpace whose Type is `t' or null if there is no
330 /// DeclSpace for `t' (ie, the Type comes from a library)
331 /// </summary>
332 public static DeclSpace LookupDeclSpace (Type t)
333 {
334 DeclSpace ds;
335 var tb = t as TypeBuilder;
336 if (tb != null && builder_to_declspace.TryGetValue (tb, out ds))
337 return ds;
338
339 return null;
340 }
341
342 /// <summary>
343 /// Returns the TypeContainer whose Type is `t' or null if there is no
344 /// TypeContainer for `t' (ie, the Type comes from a library)
345 /// </summary>
346 public static TypeContainer LookupTypeContainer (Type t)
347 {
348 return LookupDeclSpace (t) as TypeContainer;
349 }
350
351 public static MemberCache LookupMemberCache (Type t)
352 {
353 if (IsBeingCompiled (t)) {
354 DeclSpace container = LookupDeclSpace (t);
355 if (container != null)
356 return container.MemberCache;
357 }
358
359 if (t is GenericTypeParameterBuilder) {
360 TypeParameter container;
361 if (builder_to_type_param.TryGetValue ((GenericTypeParameterBuilder) t, out container))
362 return container.MemberCache;
363 }
364
365 return TypeHandle.GetMemberCache (t);
366 }
367
368 public static MemberCache LookupBaseInterfacesCache (Type t)
369 {
370 Type [] ifaces = GetInterfaces (t);
371
372 if (ifaces != null && ifaces.Length == 1)
373 return LookupMemberCache (ifaces [0]);
374
375 // TODO: the builder_to_member_cache should be indexed by 'ifaces', not 't'
376 MemberCache cache;
377 if (builder_to_member_cache.TryGetValue (t, out cache))
378 return cache;
379
380 cache = new MemberCache (ifaces);
381 builder_to_member_cache.Add (t, cache);
382 return cache;
383 }
384
385 public static TypeContainer LookupInterface (Type t)
386 {
387 TypeContainer tc = LookupTypeContainer (t);
388 if ((tc == null) || (tc.Kind != Kind.Interface))
389 return null;
390
391 return tc;
392 }
393
394 public static Delegate LookupDelegate (Type t)
395 {
396 return LookupDeclSpace (t) as Delegate;
397 }
398
399 public static Class LookupClass (Type t)
400 {
401 return LookupDeclSpace (t) as Class;
402 }
403
404 //
405 // We use this hash for multiple kinds of constructed types:
406 //
407 // (T, "&") Given T, get T &
408 // (T, "*") Given T, get T *
409 // (T, "[]") Given T and a array dimension, get T []
410 // (T, X) Given a type T and a simple name X, get the type T+X
411 //
412 // Accessibility tests, if necessary, should be done by the user
413 //
414 static DoubleHash type_hash = new DoubleHash ();
415
416 //
417 // Gets the reference to T version of the Type (T&)
418 //
419 public static Type GetReferenceType (Type t)
420 {
421 return t.MakeByRefType ();
422 }
423
424 //
425 // Gets the pointer to T version of the Type (T*)
426 //
427 public static Type GetPointerType (Type t)
428 {
429 return GetConstructedType (t, "*");
430 }
431
432 public static Type GetConstructedType (Type t, string dim)
433 {
434 object ret = null;
435 if (type_hash.Lookup (t, dim, out ret))
436 return (Type) ret;
437
438 if (IsDynamicType (t)) {
439 ret = new DynamicArrayType (dim.Length - 1);
440 type_hash.Insert (t, dim, ret);
441 return (Type) ret;
442 }
443
444 ret = t.Module.GetType (t.ToString () + dim);
445 if (ret != null) {
446 type_hash.Insert (t, dim, ret);
447 return (Type) ret;
448 }
449
450 if (dim == "&") {
451 ret = GetReferenceType (t);
452 type_hash.Insert (t, dim, ret);
453 return (Type) ret;
454 }
455
456 if (t.IsGenericParameter || t.IsGenericType) {
457 int pos = 0;
458 Type result = t;
459 while ((pos < dim.Length) && (dim [pos] == '[')) {
460 pos++;
461
462 if (dim [pos] == ']') {
463 result = result.MakeArrayType ();
464 pos++;
465
466 if (pos < dim.Length)
467 continue;
468
469 type_hash.Insert (t, dim, result);
470 return result;
471 }
472
473 int rank = 0;
474 while (dim [pos] == ',') {
475 pos++; rank++;
476 }
477
478 if ((dim [pos] != ']') || (pos != dim.Length-1))
479 break;
480
481 result = result.MakeArrayType (rank + 1);
482 type_hash.Insert (t, dim, result);
483 return result;
484 }
485 }
486
487 type_hash.Insert (t, dim, null);
488 return null;
489 }
490
491 public static Type GetNestedType (Type t, string name)
492 {
493 object ret = null;
494 if (!type_hash.Lookup (t, name, out ret)) {
495 ret = t.GetNestedType (name,
496 BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.DeclaredOnly);
497 type_hash.Insert (t, name, ret);
498 }
499 return (Type) ret;
500 }
501
502 /// <summary>
503 /// Fills static table with exported types from all referenced assemblies.
504 /// This information is required for CLS Compliance tests.
505 /// </summary>
506 public static void LoadAllImportedTypes ()
507 {
508 AllClsTopLevelTypes = new Dictionary<string, object> (1500);
509 foreach (Assembly a in GlobalRootNamespace.Instance.Assemblies) {
510 foreach (Type t in a.GetExportedTypes ()) {
511 AllClsTopLevelTypes [t.FullName.ToLower (System.Globalization.CultureInfo.InvariantCulture)] = null;
512 }
513 }
514 }
515
516 /// <summary>
517 /// Returns the C# name of a type if possible, or the full type name otherwise
518 /// </summary>
519 static public string CSharpName (Type t)
520 {
521 if (t == null_type)
522 return "null";
523
524 if (t == typeof (ArglistAccess))
525 return "__arglist";
526
527 if (t == typeof (AnonymousMethodBody))
528 return "anonymous method";
529
530 if (t == typeof (MethodGroupExpr))
531 return "method group";
532
533 if (IsDynamicType (t))
534 return "dynamic";
535
536 if (t == null)
537 return "internal error";
538
539 return CSharpName (GetFullName (t), t);
540 }
541
542 static readonly char [] elements = new char [] { '*', '[' };
543
544 public static string CSharpName (string name, Type type)
545 {
546 if (name.Length > 10) {
547 string s;
548 switch (name) {
549 case "System.Int32": s = "int"; break;
550 case "System.Int64": s = "long"; break;
551 case "System.String": s = "string"; break;
552 case "System.Boolean": s = "bool"; break;
553 case "System.Void": s = "void"; break;
554 case "System.Object": s = "object"; break;
555 case "System.UInt32": s = "uint"; break;
556 case "System.Int16": s = "short"; break;
557 case "System.UInt16": s = "ushort"; break;
558 case "System.UInt64": s = "ulong"; break;
559 case "System.Single": s = "float"; break;
560 case "System.Double": s = "double"; break;
561 case "System.Decimal": s = "decimal"; break;
562 case "System.Char": s = "char"; break;
563 case "System.Byte": s = "byte"; break;
564 case "System.SByte": s = "sbyte"; break;
565 default: s = null; break;
566 }
567
568 if (s != null) {
569 //
570 // Predefined names can come from mscorlib only
571 //
572 if (type == null || type.Module.Name == "mscorlib.dll" || !RootContext.StdLib)
573 return s;
574
575 return name;
576 }
577
578 if (name [0] == AnonymousTypeClass.ClassNamePrefix [0] && name.StartsWith (AnonymousTypeClass.ClassNamePrefix))
579 return AnonymousTypeClass.SignatureForError;
580
581 int idx = name.IndexOfAny (elements, 10);
582 if (idx > 0)
583 return CSharpName (name.Substring (0, idx), type) + name.Substring (idx);
584 }
585
586 return name.Replace ('+', '.');
587 }
588
589 static public string CSharpName (Type[] types)
590 {
591 if (types.Length == 0)
592 return string.Empty;
593
594 StringBuilder sb = new StringBuilder ();
595 for (int i = 0; i < types.Length; ++i) {
596 if (i > 0)
597 sb.Append (", ");
598
599 sb.Append (CSharpName (types [i]));
600 }
601 return sb.ToString ();
602 }
603
604 /// <summary>
605 /// Returns the signature of the method with full namespace classification
606 /// </summary>
607 static public string GetFullNameSignature (MemberInfo mi)
608 {
609 PropertyInfo pi = mi as PropertyInfo;
610 if (pi != null) {
611 MethodBase pmi = pi.GetGetMethod (true);
612 if (pmi == null)
613 pmi = pi.GetSetMethod (true);
614 if (GetParameterData (pmi).Count > 0)
615 mi = pmi;
616 }
617 return (mi is MethodBase)
618 ? CSharpSignature (mi as MethodBase)
619 : CSharpName (mi.DeclaringType) + '.' + mi.Name;
620 }
621
622 private static int GetFullName (Type t, StringBuilder sb)
623 {
624 int pos = 0;
625
626 if (!t.IsGenericType) {
627 sb.Append (t.FullName);
628 return 0;
629 }
630
631 if (t.DeclaringType != null) {
632 pos = GetFullName (t.DeclaringType, sb);
633 sb.Append ('.');
634 } else if (t.Namespace != null && t.Namespace.Length != 0) {
635 sb.Append (t.Namespace);
636 sb.Append ('.');
637 }
638 sb.Append (RemoveGenericArity (t.Name));
639
640 Type[] this_args = GetTypeArguments (t);
641
642 if (this_args.Length < pos)
643 throw new InternalErrorException (
644 "Enclosing class " + t.DeclaringType + " has more type arguments than " + t);
645 if (this_args.Length == pos)
646 return pos;
647
648 sb.Append ('<');
649 for (;;) {
650 sb.Append (CSharpName (this_args [pos++]));
651 if (pos == this_args.Length)
652 break;
653 sb.Append (',');
654 }
655 sb.Append ('>');
656 return pos;
657 }
658
659 static string GetFullName (Type t)
660 {
661 if (t.IsArray) {
662 string dimension = t.Name.Substring (t.Name.LastIndexOf ('['));
663 return GetFullName (GetElementType (t)) + dimension;
664 }
665
666 if (IsNullableType (t) && !t.IsGenericTypeDefinition) {
667 t = TypeToCoreType (GetTypeArguments (t)[0]);
668 return CSharpName (t) + "?";
669 }
670
671 if (t.IsGenericParameter)
672 return t.Name;
673 if (!t.IsGenericType)
674 return t.FullName;
675
676 StringBuilder sb = new StringBuilder ();
677 int pos = GetFullName (t, sb);
678 if (pos <= 0)
679 throw new InternalErrorException ("Generic Type " + t + " doesn't have type arguments");
680 return sb.ToString ();
681 }
682
683 public static string RemoveGenericArity (string from)
684 {
685 int i = from.IndexOf ('`');
686 if (i > 0)
687 return from.Substring (0, i);
688 return from;
689 }
690
691 /// <summary>
692 /// When we need to report accessors as well
693 /// </summary>
694 static public string CSharpSignature (MethodBase mb)
695 {
696 return CSharpSignature (mb, false);
697 }
698
699 /// <summary>
700 /// Returns the signature of the method
701 /// </summary>
702 static public string CSharpSignature (MethodBase mb, bool show_accessor)
703 {
704 StringBuilder sig = new StringBuilder (CSharpName (mb.DeclaringType));
705 sig.Append ('.');
706
707 AParametersCollection iparams = GetParameterData (mb);
708 string parameters = iparams.GetSignatureForError ();
709 int accessor_end = 0;
710
711 if (!mb.IsConstructor && TypeManager.IsSpecialMethod (mb)) {
712 string op_name = Operator.GetName (mb.Name);
713 if (op_name != null) {
714 if (op_name == "explicit" || op_name == "implicit") {
715 sig.Append (op_name);
716 sig.Append (" operator ");
717 sig.Append (CSharpName (((MethodInfo)mb).ReturnType));
718 } else {
719 sig.Append ("operator ");
720 sig.Append (op_name);
721 }
722 sig.Append (parameters);
723 return sig.ToString ();
724 }
725
726 bool is_getter = mb.Name.StartsWith ("get_");
727 bool is_setter = mb.Name.StartsWith ("set_");
728 if (is_getter || is_setter || mb.Name.StartsWith ("add_")) {
729 accessor_end = 3;
730 } else if (mb.Name.StartsWith ("remove_")) {
731 accessor_end = 6;
732 }
733
734 // Is indexer
735 if (iparams.Count > (is_getter ? 0 : 1)) {
736 sig.Append ("this[");
737 if (is_getter)
738 sig.Append (parameters.Substring (1, parameters.Length - 2));
739 else
740 sig.Append (parameters.Substring (1, parameters.LastIndexOf (',') - 1));
741 sig.Append (']');
742 } else {
743 sig.Append (mb.Name.Substring (accessor_end + 1));
744 }
745 } else {
746 if (mb.Name == ".ctor")
747 sig.Append (RemoveGenericArity (mb.DeclaringType.Name));
748 else {
749 sig.Append (mb.Name);
750
751 if (IsGenericMethod (mb)) {
752 Type[] args = GetGenericArguments (mb);
753 sig.Append ('<');
754 for (int i = 0; i < args.Length; i++) {
755 if (i > 0)
756 sig.Append (',');
757 sig.Append (CSharpName (args [i]));
758 }
759 sig.Append ('>');
760 }
761 }
762
763 sig.Append (parameters);
764 }
765
766 if (show_accessor && accessor_end > 0) {
767 sig.Append ('.');
768 sig.Append (mb.Name.Substring (0, accessor_end));
769 }
770
771 return sig.ToString ();
772 }
773
774 public static string GetMethodName (MethodInfo m)
775 {
776 if (!IsGenericMethodDefinition (m) && !IsGenericMethod (m))
777 return m.Name;
778
779 return MemberName.MakeName (m.Name, TypeManager.GetGenericArguments (m).Length);
780 }
781
782 static public string CSharpSignature (EventInfo ei)
783 {
784 return CSharpName (ei.DeclaringType) + "." + ei.Name;
785 }
786
787 //
788 // Looks up a type, and aborts if it is not found. This is used
789 // by predefined types required by the compiler
790 //
791 public static Type CoreLookupType (CompilerContext ctx, string ns_name, string name, Kind type_kind, bool required)
792 {
793 Namespace ns = GlobalRootNamespace.Instance.GetNamespace (ns_name, true);
794 Expression expr = ns.Lookup (ctx, name, Location.Null);
795
796 if (expr == null) {
797 if (required) {
798 ctx.Report.Error (518, "The predefined type `{0}.{1}' is not defined or imported",
799 ns_name, name);
800 }
801 return null;
802 }
803
804 Type t = expr.Type;
805 if (RootContext.StdLib || t == null || !required)
806 return t;
807
808 // TODO: All predefined imported types have to have correct signature
809 if (!IsBeingCompiled (t))
810 return t;
811
812 DeclSpace ds = (DeclSpace)RootContext.ToplevelTypes.GetDefinition (t.FullName);
813 if (ds is Delegate) {
814 if (type_kind == Kind.Delegate)
815 return t;
816 } else {
817 TypeContainer tc = (TypeContainer)ds;
818 if (tc.Kind == type_kind)
819 return t;
820 }
821
822 ctx.Report.Error (520, ds.Location, "The predefined type `{0}.{1}' is not declared correctly",
823 ns_name, name);
824 return null;
825 }
826
827 static MemberInfo GetPredefinedMember (Type t, string name, MemberTypes mt, Location loc, params Type [] args)
828 {
829 const BindingFlags flags = instance_and_static | BindingFlags.Public | BindingFlags.DeclaredOnly;
830
831 MemberInfo [] members = MemberLookup (null, null, t, mt, flags, name, null);
832 if (members != null) {
833 for (int i = 0; i < members.Length; ++i) {
834 MemberInfo member = members [i];
835 if (mt == MemberTypes.Method || mt == MemberTypes.Constructor) {
836 MethodBase mb = member as MethodBase;
837 if (mb == null)
838 continue;
839
840 AParametersCollection pd = TypeManager.GetParameterData (mb);
841 if (IsEqual (pd.Types, args))
842 return member;
843 }
844 if (mt == MemberTypes.Field) {
845 FieldInfo fi = member as FieldInfo;
846 if (fi == null)
847 continue;
848
849 if (args.Length >= 1 && !IsEqual (TypeToCoreType (fi.FieldType), args [0]))
850 continue;
851
852 return member;
853 }
854
855 if (mt == MemberTypes.Property) {
856 PropertyInfo pi = member as PropertyInfo;
857 if (pi == null)
858 continue;
859
860 if (args.Length >= 1 && !IsEqual (TypeToCoreType (pi.PropertyType), args [0]))
861 continue;
862
863 return member;
864 }
865 }
866 }
867
868 string method_args = null;
869 if (mt == MemberTypes.Method || mt == MemberTypes.Constructor)
870 method_args = "(" + TypeManager.CSharpName (args) + ")";
871
872 RootContext.ToplevelTypes.Compiler.Report.Error (656, loc, "The compiler required member `{0}.{1}{2}' could not be found or is inaccessible",
873 TypeManager.CSharpName (t), name, method_args);
874
875 return null;
876 }
877
878 //
879 // Returns the ConstructorInfo for "args"
880 //
881 public static ConstructorInfo GetPredefinedConstructor (Type t, Location loc, params Type [] args)
882 {
883 return (ConstructorInfo) GetPredefinedMember (t, ConstructorInfo.ConstructorName, MemberTypes.Constructor, loc, args);
884 }
885
886 //
887 // Returns the MethodInfo for a method named `name' defined
888 // in type `t' which takes arguments of types `args'
889 //
890 public static MethodInfo GetPredefinedMethod (Type t, string name, Location loc, params Type [] args)
891 {
892 return (MethodInfo)GetPredefinedMember (t, name, MemberTypes.Method, loc, args);
893 }
894
895 public static FieldInfo GetPredefinedField (Type t, string name, Location loc, params Type [] args)
896 {
897 return (FieldInfo) GetPredefinedMember (t, name, MemberTypes.Field, loc, args);
898 }
899
900 public static PropertyInfo GetPredefinedProperty (Type t, string name, Location loc, params Type [] args)
901 {
902 return (PropertyInfo) GetPredefinedMember (t, name, MemberTypes.Property, loc, args);
903 }
904
905 /// <remarks>
906 /// The types have to be initialized after the initial
907 /// population of the type has happened (for example, to
908 /// bootstrap the corlib.dll
909 /// </remarks>
910 public static bool InitCoreTypes (CompilerContext ctx)
911 {
912 object_type = CoreLookupType (ctx, "System", "Object", Kind.Class, true);
913 system_object_expr.Type = object_type;
914 value_type = CoreLookupType (ctx, "System", "ValueType", Kind.Class, true);
915 system_valuetype_expr.Type = value_type;
916 attribute_type = CoreLookupType (ctx, "System", "Attribute", Kind.Class, true);
917
918 int32_type = CoreLookupType (ctx, "System", "Int32", Kind.Struct, true);
919 system_int32_expr.Type = int32_type;
920 int64_type = CoreLookupType (ctx, "System", "Int64", Kind.Struct, true);
921 system_int64_expr.Type = int64_type;
922 uint32_type = CoreLookupType (ctx, "System", "UInt32", Kind.Struct, true);
923 system_uint32_expr.Type = uint32_type;
924 uint64_type = CoreLookupType (ctx, "System", "UInt64", Kind.Struct, true);
925 system_uint64_expr.Type = uint64_type;
926 byte_type = CoreLookupType (ctx, "System", "Byte", Kind.Struct, true);
927 system_byte_expr.Type = byte_type;
928 sbyte_type = CoreLookupType (ctx, "System", "SByte", Kind.Struct, true);
929 system_sbyte_expr.Type = sbyte_type;
930 short_type = CoreLookupType (ctx, "System", "Int16", Kind.Struct, true);
931 system_int16_expr.Type = short_type;
932 ushort_type = CoreLookupType (ctx, "System", "UInt16", Kind.Struct, true);
933 system_uint16_expr.Type = ushort_type;
934
935 ienumerator_type = CoreLookupType (ctx, "System.Collections", "IEnumerator", Kind.Interface, true);
936 ienumerable_type = CoreLookupType (ctx, "System.Collections", "IEnumerable", Kind.Interface, true);
937 idisposable_type = CoreLookupType (ctx, "System", "IDisposable", Kind.Interface, true);
938
939 // HACK: DefineType immediately resolves iterators (very wrong)
940 generic_ienumerator_type = CoreLookupType (ctx, "System.Collections.Generic", "IEnumerator`1", Kind.Interface, false);
941
942 char_type = CoreLookupType (ctx, "System", "Char", Kind.Struct, true);
943 system_char_expr.Type = char_type;
944 string_type = CoreLookupType (ctx, "System", "String", Kind.Class, true);
945 system_string_expr.Type = string_type;
946 float_type = CoreLookupType (ctx, "System", "Single", Kind.Struct, true);
947 system_single_expr.Type = float_type;
948 double_type = CoreLookupType (ctx, "System", "Double", Kind.Struct, true);
949 system_double_expr.Type = double_type;
950 decimal_type = CoreLookupType (ctx, "System", "Decimal", Kind.Struct, true);
951 system_decimal_expr.Type = decimal_type;
952 bool_type = CoreLookupType (ctx, "System", "Boolean", Kind.Struct, true);
953 system_boolean_expr.Type = bool_type;
954 intptr_type = CoreLookupType (ctx, "System", "IntPtr", Kind.Struct, true);
955 system_intptr_expr.Type = intptr_type;
956 uintptr_type = CoreLookupType (ctx, "System", "UIntPtr", Kind.Struct, true);
957
958 multicast_delegate_type = CoreLookupType (ctx, "System", "MulticastDelegate", Kind.Class, true);
959 delegate_type = CoreLookupType (ctx, "System", "Delegate", Kind.Class, true);
960
961 enum_type = CoreLookupType (ctx, "System", "Enum", Kind.Class, true);
962 array_type = CoreLookupType (ctx, "System", "Array", Kind.Class, true);
963 void_type = CoreLookupType (ctx, "System", "Void", Kind.Struct, true);
964 system_void_expr.Type = void_type;
965 type_type = CoreLookupType (ctx, "System", "Type", Kind.Class, true);
966 exception_type = CoreLookupType (ctx, "System", "Exception", Kind.Class, true);
967
968 runtime_field_handle_type = CoreLookupType (ctx, "System", "RuntimeFieldHandle", Kind.Struct, true);
969 runtime_handle_type = CoreLookupType (ctx, "System", "RuntimeTypeHandle", Kind.Struct, true);
970
971 PredefinedAttributes.Get.ParamArray.Initialize (ctx, false);
972 PredefinedAttributes.Get.Out.Initialize (ctx, false);
973
974 return ctx.Report.Errors == 0;
975 }
976
977 //
978 // Initializes optional core types
979 //
980 public static void InitOptionalCoreTypes (CompilerContext ctx)
981 {
982 //
983 // These are only used for compare purposes
984 //
985 null_type = typeof (NullLiteral);
986
987 void_ptr_type = GetPointerType (void_type);
988
989 //
990 // Initialize InternalsVisibleTo as the very first optional type. Otherwise we would populate
991 // types cache with incorrect accessiblity when any of optional types is internal.
992 //
993 PredefinedAttributes.Get.Initialize (ctx);
994
995 runtime_argument_handle_type = CoreLookupType (ctx, "System", "RuntimeArgumentHandle", Kind.Struct, false);
996 asynccallback_type = CoreLookupType (ctx, "System", "AsyncCallback", Kind.Delegate, false);
997 iasyncresult_type = CoreLookupType (ctx, "System", "IAsyncResult", Kind.Interface, false);
998 typed_reference_type = CoreLookupType (ctx, "System", "TypedReference", Kind.Struct, false);
999 arg_iterator_type = CoreLookupType (ctx, "System", "ArgIterator", Kind.Struct, false);
1000 mbr_type = CoreLookupType (ctx, "System", "MarshalByRefObject", Kind.Class, false);
1001
1002 //
1003 // Optional attributes, used for error reporting only
1004 //
1005 //if (PredefinedAttributes.Get.Obsolete.IsDefined) {
1006 // Class c = TypeManager.LookupClass (PredefinedAttributes.Get.Obsolete.Type);
1007 // if (c != null)
1008 // c.Define ();
1009 //}
1010
1011 generic_ilist_type = CoreLookupType (ctx, "System.Collections.Generic", "IList`1", Kind.Interface, false);
1012 generic_icollection_type = CoreLookupType (ctx, "System.Collections.Generic", "ICollection`1", Kind.Interface, false);
1013 generic_ienumerable_type = CoreLookupType (ctx, "System.Collections.Generic", "IEnumerable`1", Kind.Interface, false);
1014 generic_nullable_type = CoreLookupType (ctx, "System", "Nullable`1", Kind.Struct, false);
1015
1016 //
1017 // Optional types which are used as types and for member lookup
1018 //
1019 runtime_helpers_type = CoreLookupType (ctx, "System.Runtime.CompilerServices", "RuntimeHelpers", Kind.Class, false);
1020
1021 // New in .NET 3.5
1022 // Note: extension_attribute_type is already loaded
1023 expression_type = CoreLookupType (ctx, "System.Linq.Expressions", "Expression`1", Kind.Class, false);
1024
1025 if (!RootContext.StdLib) {
1026 //
1027 // HACK: When building Mono corlib mcs uses loaded mscorlib which
1028 // has different predefined types and this method sets mscorlib types
1029 // to be same to avoid any type check errors.
1030 //
1031
1032 Type type = typeof (Type);
1033 Type [] system_4_type_arg = { type, type, type, type };
1034
1035 MethodInfo set_corlib_type_builders =
1036 typeof (System.Reflection.Emit.AssemblyBuilder).GetMethod (
1037 "SetCorlibTypeBuilders", BindingFlags.NonPublic | BindingFlags.Instance, null,
1038 system_4_type_arg, null);
1039
1040 if (set_corlib_type_builders != null) {
1041 object[] args = new object [4];
1042 args [0] = object_type;
1043 args [1] = value_type;
1044 args [2] = enum_type;
1045 args [3] = void_type;
1046
1047 set_corlib_type_builders.Invoke (CodeGen.Assembly.Builder, args);
1048 } else {
1049 ctx.Report.Warning (-26, 3, "The compilation may fail due to missing `{0}.SetCorlibTypeBuilders({1})' method",
1050 TypeManager.CSharpName (typeof (System.Reflection.Emit.AssemblyBuilder)),
1051 TypeManager.CSharpName (system_4_type_arg));
1052 }
1053 }
1054 }
1055
1056 const BindingFlags instance_and_static = BindingFlags.Static | BindingFlags.Instance;
1057
1058 /// <remarks>
1059 /// This is the "old", non-cache based FindMembers() function. We cannot use
1060 /// the cache here because there is no member name argument.
1061 /// </remarks>
1062 public static MemberList FindMembers (Type t, MemberTypes mt, BindingFlags bf,
1063 MemberFilter filter, object criteria)
1064 {
1065 #if MS_COMPATIBLE
1066 if (t.IsGenericType)
1067 t = t.GetGenericTypeDefinition ();
1068 #endif
1069
1070 DeclSpace decl = LookupDeclSpace (t);
1071
1072 //
1073 // `builder_to_declspace' contains all dynamic types.
1074 //
1075 if (decl != null) {
1076 MemberList list;
1077 Timer.StartTimer (TimerType.FindMembers);
1078 list = decl.FindMembers (mt, bf, filter, criteria);
1079 Timer.StopTimer (TimerType.FindMembers);
1080 return list;
1081 }
1082
1083 //
1084 // We have to take care of arrays specially, because GetType on
1085 // a TypeBuilder array will return a Type, not a TypeBuilder,
1086 // and we can not call FindMembers on this type.
1087 //
1088 if (
1089 #if MS_COMPATIBLE
1090 !t.IsGenericType &&
1091 #endif
1092 t.IsSubclassOf (TypeManager.array_type))
1093 return new MemberList (TypeManager.array_type.FindMembers (mt, bf, filter, criteria));
1094
1095 if (t is GenericTypeParameterBuilder) {
1096 TypeParameter tparam = builder_to_type_param [(GenericTypeParameterBuilder) t];
1097
1098 Timer.StartTimer (TimerType.FindMembers);
1099 MemberList list = tparam.FindMembers (
1100 mt, bf | BindingFlags.DeclaredOnly, filter, criteria);
1101 Timer.StopTimer (TimerType.FindMembers);
1102 return list;
1103 }
1104
1105 //
1106 // Since FindMembers will not lookup both static and instance
1107 // members, we emulate this behaviour here.
1108 //
1109 if ((bf & instance_and_static) == instance_and_static){
1110 MemberInfo [] i_members = t.FindMembers (
1111 mt, bf & ~BindingFlags.Static, filter, criteria);
1112
1113 int i_len = i_members.Length;
1114 if (i_len == 1){
1115 MemberInfo one = i_members [0];
1116
1117 //
1118 // If any of these are present, we are done!
1119 //
1120 if ((one is Type) || (one is EventInfo) || (one is FieldInfo))
1121 return new MemberList (i_members);
1122 }
1123
1124 MemberInfo [] s_members = t.FindMembers (
1125 mt, bf & ~BindingFlags.Instance, filter, criteria);
1126
1127 int s_len = s_members.Length;
1128 if (i_len > 0 || s_len > 0)
1129 return new MemberList (i_members, s_members);
1130 else {
1131 if (i_len > 0)
1132 return new MemberList (i_members);
1133 else
1134 return new MemberList (s_members);
1135 }
1136 }
1137
1138 return new MemberList (t.FindMembers (mt, bf, filter, criteria));
1139 }
1140
1141
1142 /// <summary>
1143 /// This method is only called from within MemberLookup. It tries to use the member
1144 /// cache if possible and falls back to the normal FindMembers if not. The `used_cache'
1145 /// flag tells the caller whether we used the cache or not. If we used the cache, then
1146 /// our return value will already contain all inherited members and the caller don't need
1147 /// to check base classes and interfaces anymore.
1148 /// </summary>
1149 private static MemberInfo [] MemberLookup_FindMembers (Type t, MemberTypes mt, BindingFlags bf,
1150 string name, out bool used_cache)
1151 {
1152 MemberCache cache;
1153
1154 //
1155 // If this is a dynamic type, it's always in the `builder_to_declspace' hash table
1156 // and we can ask the DeclSpace for the MemberCache.
1157 //
1158 #if MS_COMPATIBLE
1159 if (t.Assembly == CodeGen.Assembly.Builder) {
1160 if (t.IsGenericParameter) {
1161 TypeParameter tparam = builder_to_type_param [(GenericTypeParameterBuilder) t];
1162
1163 used_cache = true;
1164 if (tparam.MemberCache == null)
1165 return new MemberInfo[0];
1166
1167 return tparam.MemberCache.FindMembers (
1168 mt, bf, name, FilterWithClosure_delegate, null);
1169 }
1170
1171 //
1172 // We have to take care of arrays specially, because GetType on
1173 // a TypeBuilder array will return a Type, not a TypeBuilder,
1174 // and we can not call FindMembers on this type.
1175 //
1176 if (t.IsArray) {
1177 used_cache = true;
1178 return TypeHandle.ArrayType.MemberCache.FindMembers (
1179 mt, bf, name, FilterWithClosure_delegate, null);
1180 }
1181
1182 if (t.IsGenericType && !t.IsGenericTypeDefinition)
1183 t = t.GetGenericTypeDefinition ();
1184 #else
1185 if (t is TypeBuilder) {
1186 #endif
1187 DeclSpace decl = LookupDeclSpace (t);
1188 cache = decl.MemberCache;
1189
1190 //
1191 // If this DeclSpace has a MemberCache, use it.
1192 //
1193
1194 if (cache != null) {
1195 used_cache = true;
1196 return cache.FindMembers (
1197 mt, bf, name, FilterWithClosure_delegate, null);
1198 }
1199
1200 // If there is no MemberCache, we need to use the "normal" FindMembers.
1201 // Note, this is a VERY uncommon route!
1202
1203 MemberList list;
1204 Timer.StartTimer (TimerType.FindMembers);
1205 list = decl.FindMembers (mt, bf | BindingFlags.DeclaredOnly,
1206 FilterWithClosure_delegate, name);
1207 Timer.StopTimer (TimerType.FindMembers);
1208 used_cache = false;
1209 return (MemberInfo []) list;
1210 }
1211
1212 //
1213 // We have to take care of arrays specially, because GetType on
1214 // a TypeBuilder array will return a Type, not a TypeBuilder,
1215 // and we can not call FindMembers on this type.
1216 //
1217 if (t.IsArray) {
1218 used_cache = true;
1219 return TypeHandle.ArrayType.MemberCache.FindMembers (
1220 mt, bf, name, FilterWithClosure_delegate, null);
1221 }
1222
1223 if (t is GenericTypeParameterBuilder) {
1224 TypeParameter tparam = builder_to_type_param [(GenericTypeParameterBuilder) t];
1225
1226 used_cache = true;
1227 if (tparam.MemberCache == null)
1228 return new MemberInfo [0];
1229
1230 return tparam.MemberCache.FindMembers (
1231 mt, bf, name, FilterWithClosure_delegate, null);
1232 }
1233
1234 if (IsGenericType (t) && (mt == MemberTypes.NestedType)) {
1235 //
1236 // This happens if we're resolving a class'es base class and interfaces
1237 // in TypeContainer.DefineType(). At this time, the types aren't
1238 // populated yet, so we can't use the cache.
1239 //
1240 MemberInfo[] info = t.FindMembers (mt, bf | BindingFlags.DeclaredOnly,
1241 FilterWithClosure_delegate, name);
1242 used_cache = false;
1243 return info;
1244 }
1245
1246 //
1247 // This call will always succeed. There is exactly one TypeHandle instance per
1248 // type, TypeHandle.GetMemberCache() will, if necessary, create a new one, and return
1249 // the corresponding MemberCache.
1250 //
1251 cache = TypeHandle.GetMemberCache (t);
1252
1253 used_cache = true;
1254 return cache.FindMembers (mt, bf, name, FilterWithClosure_delegate, null);
1255 }
1256
1257 //
1258 // Return true for SRE dynamic/unclosed members
1259 //
1260 public static bool IsBeingCompiled (MemberInfo mi)
1261 {
1262 return mi.Module.Assembly == CodeGen.Assembly.Builder;
1263 }
1264
1265 public static bool IsBuiltinType (Type t)
1266 {
1267 t = TypeToCoreType (t);
1268 if (t == object_type || t == string_type || t == int32_type || t == uint32_type ||
1269 t == int64_type || t == uint64_type || t == float_type || t == double_type ||
1270 t == char_type || t == short_type || t == decimal_type || t == bool_type ||
1271 t == sbyte_type || t == byte_type || t == ushort_type || t == void_type)
1272 return true;
1273 else
1274 return false;
1275 }
1276
1277 //
1278 // This is like IsBuiltinType, but lacks decimal_type, we should also clean up
1279 // the pieces in the code where we use IsBuiltinType and special case decimal_type.
1280 //
1281 public static bool IsPrimitiveType (Type t)
1282 {
1283 return (t == int32_type || t == uint32_type ||
1284 t == int64_type || t == uint64_type || t == float_type || t == double_type ||
1285 t == char_type || t == short_type || t == bool_type ||
1286 t == sbyte_type || t == byte_type || t == ushort_type);
1287 }
1288
1289 public static bool IsDelegateType (Type t)
1290 {
1291 if (TypeManager.IsGenericParameter (t))
1292 return false;
1293
1294 if (t == TypeManager.delegate_type || t == TypeManager.multicast_delegate_type)
1295 return false;
1296
1297 t = DropGenericTypeArguments (t);
1298 return IsSubclassOf (t, TypeManager.delegate_type);
1299 }
1300
1301 //
1302 // Is a type of dynamic type
1303 //
1304 public static bool IsDynamicType (Type t)
1305 {
1306 if (object.ReferenceEquals (InternalType.Dynamic, t))
1307 return true;
1308
1309 if (t != object_type)
1310 return false;
1311
1312 if (IsBeingCompiled (t))
1313 return false;
1314
1315 PredefinedAttribute pa = PredefinedAttributes.Get.Dynamic;
1316 if (pa == null)
1317 return false;
1318
1319 object[] res = t.GetCustomAttributes (pa.Type, false);
1320 return res != null && res.Length != 0;
1321 }
1322
1323 //
1324 // When any element of the type is a dynamic type
1325 //
1326 // This method builds a transformation array for dynamic types
1327 // used in places where DynamicAttribute cannnot be applied to.
1328 // It uses bool flag when type is of dynamic type and each
1329 // section always starts with "false" for some reason.
1330 //
1331 // LAMESPEC: This should be part of C# specification !
1332 //
1333 // Example: Func<dynamic, int, dynamic[]>
1334 // Transformation: { false, true, false, false, true }
1335 //
1336 public static bool[] HasDynamicTypeUsed (Type t)
1337 {
1338 if (t is DynamicArrayType)
1339 return new bool[] { false, true };
1340
1341 if (t == null)
1342 return null;
1343
1344 if (IsGenericType (t)) {
1345 List<bool> transform = null;
1346 var targs = GetTypeArguments (t);
1347 for (int i = 0; i < targs.Length; ++i) {
1348 var element = HasDynamicTypeUsed (targs [i]);
1349 if (element != null) {
1350 if (transform == null) {
1351 transform = new List<bool> ();
1352 for (int ii = 0; ii <= i; ++ii)
1353 transform.Add (false);
1354 }
1355
1356 transform.AddRange (element);
1357 } else if (transform != null) {
1358 transform.Add (false);
1359 }
1360 }
1361
1362 if (transform != null)
1363 return transform.ToArray ();
1364 }
1365
1366 if (object.ReferenceEquals (InternalType.Dynamic, t))
1367 return new bool [] { true };
1368
1369 return null;
1370 }
1371
1372 public static bool IsEnumType (Type t)
1373 {
1374 t = DropGenericTypeArguments (t);
1375 return t.BaseType == TypeManager.enum_type;
1376 }
1377
1378 public static bool IsBuiltinOrEnum (Type t)
1379 {
1380 if (IsBuiltinType (t))
1381 return true;
1382
1383 if (IsEnumType (t))
1384 return true;
1385
1386 return false;
1387 }
1388
1389 public static bool IsAttributeType (Type t)
1390 {
1391 return t == attribute_type && t.BaseType != null || IsSubclassOf (t, attribute_type);
1392 }
1393
1394 //
1395 // Whether a type is unmanaged. This is used by the unsafe code (25.2)
1396 //
1397 // mcs4: delete, DeclSpace.IsUnmanagedType is replacement
1398 public static bool IsUnmanagedType (Type t)
1399 {
1400 DeclSpace ds = TypeManager.LookupDeclSpace (t);
1401 if (ds != null)
1402 return ds.IsUnmanagedType ();
1403
1404 // builtins that are not unmanaged types
1405 if (t == TypeManager.object_type || t == TypeManager.string_type)
1406 return false;
1407
1408 if (IsGenericType (t) || IsGenericParameter (t))
1409 return false;
1410
1411 if (IsBuiltinOrEnum (t))
1412 return true;
1413
1414 // Someone did the work of checking if the ElementType of t is unmanaged. Let's not repeat it.
1415 if (t.IsPointer)
1416 return IsUnmanagedType (GetElementType (t));
1417
1418 // Arrays are disallowed, even if we mark them with [MarshalAs(UnmanagedType.ByValArray, ...)]
1419 if (t.IsArray)
1420 return false;
1421
1422 if (!IsValueType (t))
1423 return false;
1424
1425 for (Type p = t.DeclaringType; p != null; p = p.DeclaringType) {
1426 if (IsGenericTypeDefinition (p))
1427 return false;
1428 }
1429
1430 bool retval = true;
1431 {
1432 FieldInfo [] fields = t.GetFields (BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
1433
1434 foreach (FieldInfo f in fields){
1435 if (!IsUnmanagedType (f.FieldType)){
1436 retval = false;
1437 }
1438 }
1439 }
1440
1441 return retval;
1442 }
1443
1444 //
1445 // Null is considered to be a reference type
1446 //
1447 public static bool IsReferenceType (Type t)
1448 {
1449 if (TypeManager.IsGenericParameter (t)) {
1450 GenericConstraints constraints = TypeManager.GetTypeParameterConstraints (t);
1451 if (constraints == null)
1452 return false;
1453
1454 return constraints.IsReferenceType;
1455 }
1456
1457 return !IsStruct (t) && !IsEnumType (t);
1458 }
1459
1460 public static bool IsValueType (Type t)
1461 {
1462 if (TypeManager.IsGenericParameter (t)) {
1463 GenericConstraints constraints = TypeManager.GetTypeParameterConstraints (t);
1464 if (constraints == null)
1465 return false;
1466
1467 return constraints.IsValueType;
1468 }
1469
1470 return IsStruct (t) || IsEnumType (t);
1471 }
1472
1473 public static bool IsStruct (Type t)
1474 {
1475 return t.BaseType == value_type && t != enum_type && t.IsSealed;
1476 }
1477
1478 public static bool IsInterfaceType (Type t)
1479 {
1480 TypeContainer tc = LookupTypeContainer (t);
1481 if (tc == null)
1482 return false;
1483
1484 return tc.Kind == Kind.Interface;
1485 }
1486
1487 public static bool IsSubclassOf (Type type, Type base_type)
1488 {
1489 TypeParameter tparam = LookupTypeParameter (type);
1490 TypeParameter pparam = LookupTypeParameter (base_type);
1491
1492 if ((tparam != null) && (pparam != null)) {
1493 if (tparam == pparam)
1494 return true;
1495
1496 return tparam.IsSubclassOf (base_type);
1497 }
1498
1499 #if MS_COMPATIBLE
1500 if (tparam != pparam)
1501 return false;
1502
1503 if (type.IsGenericType)
1504 type = type.GetGenericTypeDefinition ();
1505 #endif
1506
1507 if (type.IsSubclassOf (base_type))
1508 return true;
1509
1510 do {
1511 if (IsEqual (type, base_type))
1512 return true;
1513
1514 type = type.BaseType;
1515 } while (type != null);
1516
1517 return false;
1518 }
1519
1520 public static bool IsPrivateAccessible (Type type, Type parent)
1521 {
1522 if (type == null)
1523 return false;
1524
1525 if (type.Equals (parent))
1526 return true;
1527
1528 return DropGenericTypeArguments (type) == DropGenericTypeArguments (parent);
1529 }
1530
1531 public static bool IsFamilyAccessible (Type type, Type parent)
1532 {
1533 TypeParameter tparam = LookupTypeParameter (type);
1534 TypeParameter pparam = LookupTypeParameter (parent);
1535
1536 if ((tparam != null) && (pparam != null)) {
1537 if (tparam == pparam)
1538 return true;
1539
1540 return tparam.IsSubclassOf (parent);
1541 }
1542
1543 do {
1544 if (IsInstantiationOfSameGenericType (type, parent))
1545 return true;
1546
1547 type = type.BaseType;
1548 } while (type != null);
1549
1550 return false;
1551 }
1552
1553 //
1554 // Checks whether `type' is a subclass or nested child of `base_type'.
1555 //
1556 public static bool IsNestedFamilyAccessible (Type type, Type base_type)
1557 {
1558 do {
1559 if (IsFamilyAccessible (type, base_type))
1560 return true;
1561
1562 // Handle nested types.
1563 type = type.DeclaringType;
1564 } while (type != null);
1565
1566 return false;
1567 }
1568
1569 //
1570 // Checks whether `type' is a nested child of `parent'.
1571 //
1572 public static bool IsNestedChildOf (Type type, Type parent)
1573 {
1574 if (type == null)
1575 return false;
1576
1577 type = DropGenericTypeArguments (type);
1578 parent = DropGenericTypeArguments (parent);
1579
1580 if (IsEqual (type, parent))
1581 return false;
1582
1583 type = type.DeclaringType;
1584 while (type != null) {
1585 if (IsEqual (type, parent))
1586 return true;
1587
1588 type = type.DeclaringType;
1589 }
1590
1591 return false;
1592 }
1593
1594 public static bool IsSpecialType (Type t)
1595 {
1596 return t == arg_iterator_type || t == typed_reference_type;
1597 }
1598
1599 //
1600 // Checks whether `invocationAssembly' is same or a friend of the assembly
1601 //
1602 public static bool IsThisOrFriendAssembly (Assembly invocationAssembly, Assembly assembly)
1603 {
1604 if (assembly == null)
1605 throw new ArgumentNullException ("assembly");
1606
1607 // TODO: This can happen for constants used at assembly level and
1608 // predefined members
1609 // But there is no way to test for it for now, so it could be abused
1610 // elsewhere too.
1611 if (invocationAssembly == null)
1612 invocationAssembly = CodeGen.Assembly.Builder;
1613
1614 if (invocationAssembly == assembly)
1615 return true;
1616
1617 bool value;
1618 if (assembly_internals_vis_attrs.TryGetValue (assembly, out value))
1619 return value;
1620
1621 PredefinedAttribute pa = PredefinedAttributes.Get.InternalsVisibleTo;
1622 // HACK: Do very early resolve of SRE type checking
1623 if (pa.Type == null)
1624 pa.Resolve (true);
1625
1626 if (!pa.IsDefined)
1627 return false;
1628
1629 object [] attrs = assembly.GetCustomAttributes (pa.Type, false);
1630 if (attrs.Length == 0) {
1631 assembly_internals_vis_attrs.Add (assembly, false);
1632 return false;
1633 }
1634
1635 bool is_friend = false;
1636
1637 AssemblyName this_name = CodeGen.Assembly.Name;
1638 byte [] this_token = this_name.GetPublicKeyToken ();
1639 foreach (InternalsVisibleToAttribute attr in attrs) {
1640 if (attr.AssemblyName == null || attr.AssemblyName.Length == 0)
1641 continue;
1642
1643 AssemblyName aname = null;
1644 try {
1645 aname = new AssemblyName (attr.AssemblyName);
1646 } catch (FileLoadException) {
1647 } catch (ArgumentException) {
1648 }
1649
1650 if (aname == null || aname.Name != this_name.Name)
1651 continue;
1652
1653 byte [] key_token = aname.GetPublicKeyToken ();
1654 if (key_token != null) {
1655 if (this_token.Length == 0) {
1656 // Same name, but assembly is not strongnamed
1657 Error_FriendAccessNameNotMatching (aname.FullName, RootContext.ToplevelTypes.Compiler.Report);
1658 break;
1659 }
1660
1661 if (!CompareKeyTokens (this_token, key_token))
1662 continue;
1663 }
1664
1665 is_friend = true;
1666 break;
1667 }
1668
1669 assembly_internals_vis_attrs.Add (assembly, is_friend);
1670 return is_friend;
1671 }
1672
1673 static bool CompareKeyTokens (byte [] token1, byte [] token2)
1674 {
1675 for (int i = 0; i < token1.Length; i++)
1676 if (token1 [i] != token2 [i])
1677 return false;
1678
1679 return true;
1680 }
1681
1682 static void Error_FriendAccessNameNotMatching (string other_name, Report Report)
1683 {
1684 Report.Error (281,
1685 "Friend access was granted to `{0}', but the output assembly is named `{1}'. Try adding a reference to `{0}' or change the output assembly name to match it",
1686 other_name, CodeGen.Assembly.Name.FullName);
1687 }
1688
1689 //
1690 // Do the right thing when returning the element type of an
1691 // array type based on whether we are compiling corlib or not
1692 //
1693 public static Type GetElementType (Type t)
1694 {
1695 if (RootContext.StdLib)
1696 return t.GetElementType ();
1697 else
1698 return TypeToCoreType (t.GetElementType ());
1699 }
1700
1701 /// <summary>
1702 /// This method is not implemented by MS runtime for dynamic types
1703 /// </summary>
1704 public static bool HasElementType (Type t)
1705 {
1706 return t.IsArray || t.IsPointer || t.IsByRef;
1707 }
1708
1709 public static Type GetEnumUnderlyingType (Type t)
1710 {
1711 t = DropGenericTypeArguments (t);
1712 Enum e = LookupTypeContainer (t) as Enum;
1713 if (e != null)
1714 return e.UnderlyingType;
1715
1716 // TODO: cache it ?
1717 FieldInfo fi = GetPredefinedField (t, Enum.UnderlyingValueField, Location.Null, Type.EmptyTypes);
1718 if (fi == null)
1719 return TypeManager.int32_type;
1720
1721 return TypeToCoreType (fi.FieldType);
1722 }
1723
1724 /// <summary>
1725 /// Gigantic work around for missing features in System.Reflection.Emit follows.
1726 /// </summary>
1727 ///
1728 /// <remarks>
1729 /// Since System.Reflection.Emit can not return MethodBase.GetParameters
1730 /// for anything which is dynamic, and we need this in a number of places,
1731 /// we register this information here, and use it afterwards.
1732 /// </remarks>
1733 static public void RegisterMethod (MethodBase mb, AParametersCollection ip)
1734 {
1735 method_params.Add (mb, ip);
1736 }
1737
1738 static public void RegisterIndexer (PropertyBuilder pb, AParametersCollection p)
1739 {
1740 method_params.Add (pb, p);
1741 }
1742
1743 static public AParametersCollection GetParameterData (MethodBase mb)
1744 {
1745 AParametersCollection pd;
1746 if (!method_params.TryGetValue (mb, out pd)) {
1747 #if MS_COMPATIBLE
1748 if (mb.IsGenericMethod && !mb.IsGenericMethodDefinition) {
1749 MethodInfo mi = ((MethodInfo) mb).GetGenericMethodDefinition ();
1750 pd = GetParameterData (mi);
1751 /*
1752 if (mi.IsGenericMethod)
1753 pd = pd.InflateTypes (mi.GetGenericArguments (), mb.GetGenericArguments ());
1754 else
1755 pd = pd.InflateTypes (mi.DeclaringType.GetGenericArguments (), mb.GetGenericArguments ());
1756 */
1757 method_params.Add (mb, pd);
1758 return pd;
1759 }
1760
1761 if (mb.DeclaringType.Assembly == CodeGen.Assembly.Builder) {
1762 throw new InternalErrorException ("Parameters are not registered for method `{0}'",
1763 TypeManager.CSharpName (mb.DeclaringType) + "." + mb.Name);
1764 }
1765
1766 pd = ParametersImported.Create (mb);
1767 #else
1768 MethodBase generic = TypeManager.DropGenericMethodArguments (mb);
1769 if (generic != mb) {
1770 pd = TypeManager.GetParameterData (generic);
1771 pd = ParametersImported.Create (pd, mb);
1772 } else {
1773 pd = ParametersImported.Create (mb);
1774 }
1775 #endif
1776 method_params.Add (mb, pd);
1777 }
1778 return pd;
1779 }
1780
1781 public static AParametersCollection GetParameterData (PropertyInfo pi)
1782 {
1783 AParametersCollection pd;
1784 if (!method_params.TryGetValue (pi, out pd)) {
1785 if (pi is PropertyBuilder)
1786 return ParametersCompiled.EmptyReadOnlyParameters;
1787
1788 ParameterInfo [] p = pi.GetIndexParameters ();
1789 if (p == null)
1790 return ParametersCompiled.EmptyReadOnlyParameters;
1791
1792 pd = ParametersImported.Create (p, null);
1793 method_params.Add (pi, pd);
1794 }
1795
1796 return pd;
1797 }
1798
1799 public static AParametersCollection GetDelegateParameters (ResolveContext ec, Type t)
1800 {
1801 Delegate d = LookupDelegate (t);
1802 if (d != null)
1803 return d.Parameters;
1804
1805 MethodInfo invoke_mb = Delegate.GetInvokeMethod (ec.Compiler, t, t);
1806 return GetParameterData (invoke_mb);
1807 }
1808
1809 static public void RegisterOverride (MethodBase override_method, MethodBase base_method)
1810 {
1811 if (!method_overrides.ContainsKey (override_method))
1812 method_overrides [override_method] = base_method;
1813 if (method_overrides [override_method] != base_method)
1814 throw new InternalErrorException ("Override mismatch: " + override_method);
1815 }
1816
1817 static public bool IsOverride (MethodBase m)
1818 {
1819 m = DropGenericMethodArguments (m);
1820
1821 return m.IsVirtual &&
1822 (m.Attributes & MethodAttributes.NewSlot) == 0 &&
1823 (m is MethodBuilder || method_overrides.ContainsKey (m));
1824 }
1825
1826 static public MethodBase TryGetBaseDefinition (MethodBase m)
1827 {
1828 m = DropGenericMethodArguments (m);
1829 MethodBase mb;
1830 if (method_overrides.TryGetValue (m, out mb))
1831 return mb;
1832
1833 return null;
1834 }
1835
1836 public static void RegisterConstant (FieldInfo fb, IConstant ic)
1837 {
1838 fields.Add (fb, ic);
1839 }
1840
1841 public static IConstant GetConstant (FieldInfo fb)
1842 {
1843 if (fb == null)
1844 return null;
1845
1846 IConstant ic;
1847 if (fields.TryGetValue (fb, out ic))
1848 return ic;
1849
1850 return null;
1851 }
1852
1853 public static void RegisterProperty (PropertyInfo pi, PropertyBase pb)
1854 {
1855 propertybuilder_to_property.Add (pi, pb);
1856 }
1857
1858 public static PropertyBase GetProperty (PropertyInfo pi)
1859 {
1860 PropertyBase pb;
1861 if (propertybuilder_to_property.TryGetValue (pi, out pb))
1862 return pb;
1863
1864 return null;
1865 }
1866
1867 static public void RegisterFieldBase (FieldBuilder fb, FieldBase f)
1868 {
1869 fieldbuilders_to_fields.Add (fb, f);
1870 }
1871
1872 //
1873 // The return value can be null; This will be the case for
1874 // auxiliary FieldBuilders created by the compiler that have no
1875 // real field being declared on the source code
1876 //
1877 static public FieldBase GetField (FieldInfo fb)
1878 {
1879 fb = GetGenericFieldDefinition (fb);
1880 FieldBase f;
1881 if (fieldbuilders_to_fields.TryGetValue (fb, out f))
1882 return f;
1883
1884 return null;
1885 }
1886
1887 static public MethodInfo GetAddMethod (EventInfo ei)
1888 {
1889 if (ei is MyEventBuilder) {
1890 return ((MyEventBuilder)ei).GetAddMethod (true);
1891 }
1892 return ei.GetAddMethod (true);
1893 }
1894
1895 static public MethodInfo GetRemoveMethod (EventInfo ei)
1896 {
1897 if (ei is MyEventBuilder) {
1898 return ((MyEventBuilder)ei).GetRemoveMethod (true);
1899 }
1900 return ei.GetRemoveMethod (true);
1901 }
1902
1903 static public void RegisterEventField (EventInfo einfo, EventField e)
1904 {
1905 if (events == null)
1906 events = new Dictionary<EventInfo, EventField> (ReferenceEquality<EventInfo>.Default);
1907
1908 events.Add (einfo, e);
1909 }
1910
1911 static public EventField GetEventField (EventInfo ei)
1912 {
1913 if (events == null)
1914 return null;
1915
1916 EventField value;
1917 if (events.TryGetValue (ei, out value))
1918 return value;
1919
1920 return null;
1921 }
1922
1923 public static bool CheckStructCycles (TypeContainer tc, Dictionary<TypeContainer, object> seen)
1924 {
1925 var hash = new Dictionary<TypeContainer, object> ();
1926 return CheckStructCycles (tc, seen, hash);
1927 }
1928
1929 public static bool CheckStructCycles (TypeContainer tc, Dictionary<TypeContainer, object> seen,
1930 Dictionary<TypeContainer, object> hash)
1931 {
1932 if ((tc.Kind != Kind.Struct) || IsBuiltinType (tc.TypeBuilder))
1933 return true;
1934
1935 //
1936 // `seen' contains all types we've already visited.
1937 //
1938 if (seen.ContainsKey (tc))
1939 return true;
1940 seen.Add (tc, null);
1941
1942 if (tc.Fields == null)
1943 return true;
1944
1945 foreach (FieldBase field in tc.Fields) {
1946 if (field.FieldBuilder == null || field.FieldBuilder.IsStatic)
1947 continue;
1948
1949 Type ftype = field.FieldBuilder.FieldType;
1950 TypeContainer ftc = LookupTypeContainer (ftype);
1951 if (ftc == null)
1952 continue;
1953
1954 if (hash.ContainsKey (ftc)) {
1955 tc.Compiler.Report.Error (523, tc.Location,
1956 "Struct member `{0}.{1}' of type `{2}' " +
1957 "causes a cycle in the struct layout",
1958 tc.Name, field.Name, ftc.Name);
1959 return false;
1960 }
1961
1962 //
1963 // `hash' contains all types in the current path.
1964 //
1965 hash.Add (tc, null);
1966
1967 bool ok = CheckStructCycles (ftc, seen, hash);
1968
1969 hash.Remove (tc);
1970
1971 if (!ok)
1972 return false;
1973
1974 if (!seen.ContainsKey (ftc))
1975 seen.Add (ftc, null);
1976 }
1977
1978 return true;
1979 }
1980
1981 /// <summary>
1982 /// Given an array of interface types, expand and eliminate repeated ocurrences
1983 /// of an interface.
1984 /// </summary>
1985 ///
1986 /// <remarks>
1987 /// This expands in context like: IA; IB : IA; IC : IA, IB; the interface "IC" to
1988 /// be IA, IB, IC.
1989 /// </remarks>
1990 public static Type[] ExpandInterfaces (TypeExpr [] base_interfaces)
1991 {
1992 var new_ifaces = new List<Type> ();
1993
1994 foreach (TypeExpr iface in base_interfaces){
1995 Type itype = iface.Type;
1996
1997 if (new_ifaces.Contains (itype))
1998 continue;
1999
2000 new_ifaces.Add (itype);
2001
2002 Type [] implementing = GetInterfaces (itype);
2003
2004 foreach (Type imp in implementing){
2005 if (!new_ifaces.Contains (imp))
2006 new_ifaces.Add (imp);
2007 }
2008 }
2009
2010 return new_ifaces.ToArray ();
2011 }
2012
2013 public static Type[] ExpandInterfaces (Type [] base_interfaces)
2014 {
2015 var new_ifaces = new List<Type> ();
2016
2017 foreach (Type itype in base_interfaces){
2018 if (new_ifaces.Contains (itype))
2019 continue;
2020
2021 new_ifaces.Add (itype);
2022
2023 Type [] implementing = GetInterfaces (itype);
2024
2025 foreach (Type imp in implementing){
2026 if (!new_ifaces.Contains (imp))
2027 new_ifaces.Add (imp);
2028 }
2029 }
2030
2031 return new_ifaces.ToArray ();
2032 }
2033
2034 /// <summary>
2035 /// This function returns the interfaces in the type `t'. Works with
2036 /// both types and TypeBuilders.
2037 /// </summary>
2038 public static Type [] GetInterfaces (Type t)
2039 {
2040 Type [] cached;
2041 if (iface_cache.TryGetValue (t, out cached))
2042 if (cached != null)
2043 return cached;
2044
2045 //
2046 // The reason for catching the Array case is that Reflection.Emit
2047 // will not return a TypeBuilder for Array types of TypeBuilder types,
2048 // but will still throw an exception if we try to call GetInterfaces
2049 // on the type.
2050 //
2051 // Since the array interfaces are always constant, we return those for
2052 // the System.Array
2053 //
2054
2055 if (t.IsArray)
2056 t = TypeManager.array_type;
2057
2058 if ((t is TypeBuilder) || IsGenericType (t)) {
2059 Type [] base_ifaces;
2060
2061 if (t.BaseType == null)
2062 base_ifaces = Type.EmptyTypes;
2063 else
2064 base_ifaces = GetInterfaces (t.BaseType);
2065 Type[] type_ifaces;
2066 if (IsGenericType (t))
2067 #if MS_COMPATIBLE
2068 type_ifaces = t.GetGenericTypeDefinition().GetInterfaces ();
2069 #else
2070 type_ifaces = t.GetInterfaces ();
2071 #endif
2072 else
2073 type_ifaces = GetExplicitInterfaces (t);
2074 if (type_ifaces == null || type_ifaces.Length == 0)
2075 type_ifaces = Type.EmptyTypes;
2076
2077 int base_count = base_ifaces.Length;
2078 Type [] result = new Type [base_count + type_ifaces.Length];
2079 base_ifaces.CopyTo (result, 0);
2080 type_ifaces.CopyTo (result, base_count);
2081
2082 iface_cache [t] = result;
2083 return result;
2084 } else if (t is GenericTypeParameterBuilder){
2085 Type[] type_ifaces = GetExplicitInterfaces (t);
2086 if (type_ifaces == null || type_ifaces.Length == 0)
2087 type_ifaces = Type.EmptyTypes;
2088
2089 iface_cache [t] = type_ifaces;
2090 return type_ifaces;
2091 } else {
2092 Type[] ifaces = t.GetInterfaces ();
2093 iface_cache [t] = ifaces;
2094 return ifaces;
2095 }
2096 }
2097
2098 //
2099 // gets the interfaces that are declared explicitly on t
2100 //
2101 public static Type[] GetExplicitInterfaces (Type t)
2102 {
2103 Type[] ifaces;
2104 if (builder_to_ifaces.TryGetValue (t, out ifaces))
2105 return ifaces;
2106
2107 return null;
2108 }
2109
2110 /// <remarks>
2111 /// The following is used to check if a given type implements an interface.
2112 /// The cache helps us reduce the expense of hitting Type.GetInterfaces everytime.
2113 /// </remarks>
2114 public static bool ImplementsInterface (Type t, Type iface)
2115 {
2116 Type [] interfaces;
2117
2118 //
2119 // FIXME OPTIMIZATION:
2120 // as soon as we hit a non-TypeBuiler in the interface
2121 // chain, we could return, as the `Type.GetInterfaces'
2122 // will return all the interfaces implement by the type
2123 // or its bases.
2124 //
2125 do {
2126 interfaces = GetInterfaces (t);
2127
2128 if (interfaces != null){
2129 foreach (Type i in interfaces){
2130 if (i == iface || IsVariantOf (i, iface))
2131 return true;
2132 }
2133 }
2134
2135 t = t.BaseType;
2136 } while (t != null);
2137
2138 return false;
2139 }
2140
2141 static NumberFormatInfo nf_provider = CultureInfo.CurrentCulture.NumberFormat;
2142
2143 // This is a custom version of Convert.ChangeType() which works
2144 // with the TypeBuilder defined types when compiling corlib.
2145 public static object ChangeType (object value, Type conversionType, out bool error)
2146 {
2147 IConvertible convert_value = value as IConvertible;
2148
2149 if (convert_value == null){
2150 error = true;
2151 return null;
2152 }
2153
2154 //
2155 // NOTE 1:
2156 // We must use Type.Equals() here since `conversionType' is
2157 // the TypeBuilder created version of a system type and not
2158 // the system type itself. You cannot use Type.GetTypeCode()
2159 // on such a type - it'd always return TypeCode.Object.
2160 //
2161 // NOTE 2:
2162 // We cannot rely on build-in type conversions as they are
2163 // more limited than what C# supports.
2164 // See char -> float/decimal/double conversion
2165 //
2166
2167 error = false;
2168 try {
2169 if (conversionType.Equals (typeof (Boolean)))
2170 return (object)(convert_value.ToBoolean (nf_provider));
2171 if (conversionType.Equals (typeof (Byte)))
2172 return (object)(convert_value.ToByte (nf_provider));
2173 if (conversionType.Equals (typeof (Char)))
2174 return (object)(convert_value.ToChar (nf_provider));
2175 if (conversionType.Equals (typeof (DateTime)))
2176 return (object)(convert_value.ToDateTime (nf_provider));
2177
2178 if (conversionType.Equals (decimal_type)) {
2179 if (convert_value.GetType () == TypeManager.char_type)
2180 return (decimal)convert_value.ToInt32 (nf_provider);
2181 return convert_value.ToDecimal (nf_provider);
2182 }
2183
2184 if (conversionType.Equals (typeof (Double))) {
2185 if (convert_value.GetType () == TypeManager.char_type)
2186 return (double)convert_value.ToInt32 (nf_provider);
2187 return convert_value.ToDouble (nf_provider);
2188 }
2189
2190 if (conversionType.Equals (typeof (Int16)))
2191 return (object)(convert_value.ToInt16 (nf_provider));
2192 if (conversionType.Equals (int32_type))
2193 return (object)(convert_value.ToInt32 (nf_provider));
2194 if (conversionType.Equals (int64_type))
2195 return (object)(convert_value.ToInt64 (nf_provider));
2196 if (conversionType.Equals (typeof (SByte)))
2197 return (object)(convert_value.ToSByte (nf_provider));
2198
2199 if (conversionType.Equals (typeof (Single))) {
2200 if (convert_value.GetType () == TypeManager.char_type)
2201 return (float)convert_value.ToInt32 (nf_provider);
2202 return convert_value.ToSingle (nf_provider);
2203 }
2204
2205 if (conversionType.Equals (typeof (String)))
2206 return (object)(convert_value.ToString (nf_provider));
2207 if (conversionType.Equals (typeof (UInt16)))
2208 return (object)(convert_value.ToUInt16 (nf_provider));
2209 if (conversionType.Equals (typeof (UInt32)))
2210 return (object)(convert_value.ToUInt32 (nf_provider));
2211 if (conversionType.Equals (typeof (UInt64)))
2212 return (object)(convert_value.ToUInt64 (nf_provider));
2213 if (conversionType.Equals (typeof (Object)))
2214 return (object)(value);
2215 else
2216 error = true;
2217 } catch {
2218 error = true;
2219 }
2220 return null;
2221 }
2222
2223 //
2224 // When compiling with -nostdlib and the type is imported from an external assembly
2225 // SRE uses "wrong" type and we have to convert it to the right compiler instance.
2226 //
2227 public static Type TypeToCoreType (Type t)
2228 {
2229 if (RootContext.StdLib || t.Module != typeof (object).Module)
2230 return t;
2231
2232 // TODO: GetTypeCode returns underlying type for enums !!
2233 TypeCode tc = Type.GetTypeCode (t);
2234
2235 switch (tc){
2236 case TypeCode.Boolean:
2237 return TypeManager.bool_type;
2238 case TypeCode.Byte:
2239 return TypeManager.byte_type;
2240 case TypeCode.SByte:
2241 return TypeManager.sbyte_type;
2242 case TypeCode.Char:
2243 return TypeManager.char_type;
2244 case TypeCode.Int16:
2245 return TypeManager.short_type;
2246 case TypeCode.UInt16:
2247 return TypeManager.ushort_type;
2248 case TypeCode.Int32:
2249 return TypeManager.int32_type;
2250 case TypeCode.UInt32:
2251 return TypeManager.uint32_type;
2252 case TypeCode.Int64:
2253 return TypeManager.int64_type;
2254 case TypeCode.UInt64:
2255 return TypeManager.uint64_type;
2256 case TypeCode.Single:
2257 return TypeManager.float_type;
2258 case TypeCode.Double:
2259 return TypeManager.double_type;
2260 case TypeCode.String:
2261 return TypeManager.string_type;
2262 case TypeCode.Decimal:
2263 return TypeManager.decimal_type;
2264 }
2265
2266 if (t == typeof (void))
2267 return TypeManager.void_type;
2268 if (t == typeof (object))
2269 return TypeManager.object_type;
2270 if (t == typeof (System.Type))
2271 return TypeManager.type_type;
2272 if (t == typeof (System.IntPtr))
2273 return TypeManager.intptr_type;
2274 if (t == typeof (System.UIntPtr))
2275 return TypeManager.uintptr_type;
2276
2277 if (t.IsArray) {
2278 int dim = t.GetArrayRank ();
2279 t = GetElementType (t);
2280 return t.MakeArrayType (dim);
2281 }
2282 if (t.IsByRef) {
2283 t = GetElementType (t);
2284 return t.MakeByRefType ();
2285 }
2286 if (t.IsPointer) {
2287 t = GetElementType (t);
2288 return t.MakePointerType ();
2289 }
2290
2291 return t;
2292 }
2293
2294 //
2295 // Converts any type to reflection supported type
2296 //
2297 public static Type TypeToReflectionType (Type type)
2298 {
2299 // TODO: Very lame and painful, GetReference () is enough for mcs-cecil
2300 if (IsDynamicType (type))
2301 return object_type;
2302
2303 if (type is DynamicArrayType)
2304 return type.UnderlyingSystemType;
2305
2306 return type;
2307 }
2308
2309 /// <summary>
2310 /// Utility function that can be used to probe whether a type
2311 /// is managed or not.
2312 /// </summary>
2313 public static bool VerifyUnmanaged (CompilerContext ctx, Type t, Location loc)
2314 {
2315 if (IsUnmanagedType (t))
2316 return true;
2317
2318 while (t.IsPointer)
2319 t = GetElementType (t);
2320
2321 ctx.Report.SymbolRelatedToPreviousError (t);
2322 ctx.Report.Error (208, loc,
2323 "Cannot take the address of, get the size of, or declare a pointer to a managed type `{0}'",
2324 CSharpName (t));
2325
2326 return false;
2327 }
2328
2329 /// <summary>
2330 /// Returns the name of the indexer in a given type.
2331 /// </summary>
2332 /// <remarks>
2333 /// The default is not always `Item'. The user can change this behaviour by
2334 /// using the IndexerNameAttribute in the container.
2335 /// For example, the String class indexer is named `Chars' not `Item'
2336 /// </remarks>
2337 public static string IndexerPropertyName (Type t)
2338 {
2339 t = DropGenericTypeArguments (t);
2340 if (t is TypeBuilder) {
2341 TypeContainer tc = t.IsInterface ? LookupInterface (t) : LookupTypeContainer (t);
2342 return tc == null ? TypeContainer.DefaultIndexerName : tc.IndexerName;
2343 }
2344
2345 PredefinedAttribute pa = PredefinedAttributes.Get.DefaultMember;
2346 if (pa.IsDefined) {
2347 System.Attribute attr = System.Attribute.GetCustomAttribute (
2348 t, pa.Type);
2349 if (attr != null) {
2350 DefaultMemberAttribute dma = (DefaultMemberAttribute) attr;
2351 return dma.MemberName;
2352 }
2353 }
2354
2355 return TypeContainer.DefaultIndexerName;
2356 }
2357
2358 private static bool IsSignatureEqual (Type a, Type b)
2359 {
2360 ///
2361 /// Consider the following example (bug #77674):
2362 ///
2363 /// public abstract class A
2364 /// {
2365 /// public abstract T Foo<T> ();
2366 /// }
2367 ///
2368 /// public abstract class B : A
2369 /// {
2370 /// public override U Foo<T> ()
2371 /// { return default (U); }
2372 /// }
2373 ///
2374 /// Here, `T' and `U' are method type parameters from different methods
2375 /// (A.Foo and B.Foo), so both `==' and Equals() will fail.
2376 ///
2377 /// However, since we're determining whether B.Foo() overrides A.Foo(),
2378 /// we need to do a signature based comparision and consider them equal.
2379
2380 if (a == b)
2381 return true;
2382
2383 if (a.IsGenericParameter && b.IsGenericParameter &&
2384 (a.DeclaringMethod != null) && (b.DeclaringMethod != null)) {
2385 return a.GenericParameterPosition == b.GenericParameterPosition;
2386 }
2387
2388 if (a.IsArray && b.IsArray) {
2389 if (a.GetArrayRank () != b.GetArrayRank ())
2390 return false;
2391
2392 return IsSignatureEqual (GetElementType (a), GetElementType (b));
2393 }
2394
2395 if (a.IsByRef && b.IsByRef)
2396 return IsSignatureEqual (GetElementType (a), GetElementType (b));
2397
2398 if (IsGenericType (a) && IsGenericType (b)) {
2399 if (DropGenericTypeArguments (a) != DropGenericTypeArguments (b))
2400 return false;
2401
2402 Type[] aargs = GetTypeArguments (a);
2403 Type[] bargs = GetTypeArguments (b);
2404
2405 if (aargs.Length != bargs.Length)
2406 return false;
2407
2408 for (int i = 0; i < aargs.Length; i++) {
2409 if (!IsSignatureEqual (aargs [i], bargs [i]))
2410 return false;
2411 }
2412
2413 return true;
2414 }
2415
2416 return false;
2417 }
2418
2419 //
2420 // Returns whether the array of memberinfos contains the given method
2421 //
2422 public static bool ArrayContainsMethod (MemberInfo [] array, MethodBase new_method, bool ignoreDeclType)
2423 {
2424 Type [] new_args = TypeManager.GetParameterData (new_method).Types;
2425
2426 foreach (MethodBase method in array) {
2427 if (!ignoreDeclType && method.DeclaringType != new_method.DeclaringType)
2428 continue;
2429
2430 if (method.Name != new_method.Name)
2431 continue;
2432
2433 if (method is MethodInfo && new_method is MethodInfo &&
2434 !IsSignatureEqual (
2435 TypeToCoreType (((MethodInfo) method).ReturnType),
2436 TypeToCoreType (((MethodInfo) new_method).ReturnType)))
2437 continue;
2438
2439 Type [] old_args = TypeManager.GetParameterData (method).Types;
2440 int old_count = old_args.Length;
2441 int i;
2442
2443 if (new_args.Length != old_count)
2444 continue;
2445
2446 for (i = 0; i < old_count; i++){
2447 if (!IsSignatureEqual (old_args [i], new_args [i]))
2448 break;
2449 }
2450 if (i != old_count)
2451 continue;
2452
2453 return true;
2454 }
2455
2456 return false;
2457 }
2458
2459 //
2460 // We copy methods from `new_members' into `target_list' if the signature
2461 // for the method from in the new list does not exist in the target_list
2462 //
2463 // The name is assumed to be the same.
2464 //
2465 public static List<MethodBase> CopyNewMethods (List<MethodBase> target_list, IList<MemberInfo> new_members)
2466 {
2467 if (target_list == null){
2468 target_list = new List<MethodBase> ();
2469
2470 foreach (MemberInfo mi in new_members){
2471 if (mi is MethodBase)
2472 target_list.Add ((MethodBase) mi);
2473 }
2474 return target_list;
2475 }
2476
2477 MethodBase[] target_array = new MethodBase[target_list.Count];
2478 target_list.CopyTo (target_array, 0);
2479
2480 foreach (MemberInfo mi in new_members){
2481 MethodBase new_method = (MethodBase) mi;
2482
2483 if (!ArrayContainsMethod (target_array, new_method, true))
2484 target_list.Add (new_method);
2485 }
2486 return target_list;
2487 }
2488
2489 #region Generics
2490 // <remarks>
2491 // Tracks the generic parameters.
2492 // </remarks>
2493
2494 public static void AddTypeParameter (GenericTypeParameterBuilder t, TypeParameter tparam)
2495 {
2496 builder_to_type_param [t] = tparam;
2497 }
2498
2499 public static TypeParameter LookupTypeParameter (Type t)
2500 {
2501 TypeParameter tp;
2502 var gtp = t as GenericTypeParameterBuilder;
2503 if (gtp != null && builder_to_type_param.TryGetValue (gtp, out tp))
2504 return tp;
2505
2506 return null;
2507 }
2508
2509 // This method always return false for non-generic compiler,
2510 // while Type.IsGenericParameter is returned if it is supported.
2511 public static bool IsGenericParameter (Type type)
2512 {
2513 return type.IsGenericParameter;
2514 }
2515
2516 public static int GenericParameterPosition (Type type)
2517 {
2518 return type.GenericParameterPosition;
2519 }
2520
2521 public static bool IsGenericType (Type type)
2522 {
2523 return type.IsGenericType;
2524 }
2525
2526 public static bool IsGenericTypeDefinition (Type type)
2527 {
2528 return type.IsGenericTypeDefinition;
2529 }
2530
2531 public static bool ContainsGenericParameters (Type type)
2532 {
2533 return type.ContainsGenericParameters;
2534 }
2535
2536 public static FieldInfo GetGenericFieldDefinition (FieldInfo fi)
2537 {
2538 if (fi.DeclaringType.IsGenericTypeDefinition ||
2539 !fi.DeclaringType.IsGenericType)
2540 return fi;
2541
2542 Type t = fi.DeclaringType.GetGenericTypeDefinition ();
2543 BindingFlags bf = BindingFlags.Public | BindingFlags.NonPublic |
2544 BindingFlags.Static | BindingFlags.Instance | BindingFlags.DeclaredOnly;
2545
2546 // TODO: use CodeGen.Module.Builder.ResolveField (fi.MetadataToken);
2547 foreach (FieldInfo f in t.GetFields (bf))
2548 if (f.MetadataToken == fi.MetadataToken)
2549 return f;
2550
2551 return fi;
2552 }
2553
2554 public static bool IsEqual (Type a, Type b)
2555 {
2556 if (a.Equals (b)) {
2557 // MS BCL returns true even if enum types are different
2558 if (a.BaseType == TypeManager.enum_type || b.BaseType == TypeManager.enum_type)
2559 return a.FullName == b.FullName;
2560
2561 // Some types are never equal
2562 if (a == TypeManager.null_type || a == InternalType.AnonymousMethod)
2563 return false;
2564
2565 return true;
2566 }
2567
2568 if (IsGenericParameter (a) && IsGenericParameter (b)) {
2569 // TODO: needs more testing before cleaning up
2570 //if (a.DeclaringMethod != b.DeclaringMethod &&
2571 // (a.DeclaringMethod == null || b.DeclaringMethod == null))
2572 // return false;
2573 return a.GenericParameterPosition == b.GenericParameterPosition;
2574 }
2575
2576 if (a.IsArray && b.IsArray) {
2577 if (a.GetArrayRank () != b.GetArrayRank ())
2578 return false;
2579 return IsEqual (GetElementType (a), GetElementType (b));
2580 }
2581
2582 if (a.IsByRef && b.IsByRef)
2583 return IsEqual (a.GetElementType (), b.GetElementType ());
2584
2585 if (IsGenericType (a) && IsGenericType (b)) {
2586 Type adef = DropGenericTypeArguments (a);
2587 Type bdef = DropGenericTypeArguments (b);
2588
2589 if (adef != bdef)
2590 return false;
2591
2592 if (adef.IsEnum && bdef.IsEnum)
2593 return true;
2594
2595 Type[] aargs = GetTypeArguments (a);
2596 Type[] bargs = GetTypeArguments (b);
2597
2598 if (aargs.Length != bargs.Length)
2599 return false;
2600
2601 for (int i = 0; i < aargs.Length; i++) {
2602 if (!IsEqual (aargs [i], bargs [i]))
2603 return false;
2604 }
2605
2606 return true;
2607 }
2608
2609 return false;
2610 }
2611
2612 public static bool IsEqual (Type[] a, Type[] b)
2613 {
2614 if (a == null || b == null || a.Length != b.Length)
2615 return false;
2616
2617 for (int i = 0; i < a.Length; ++i) {
2618 if (a [i] == null || b [i] == null) {
2619 if (a [i] == b [i])
2620 continue;
2621
2622 return false;
2623 }
2624
2625 if (!IsEqual (a [i], b [i]))
2626 return false;
2627 }
2628
2629 return true;
2630 }
2631
2632 public static Type DropGenericTypeArguments (Type t)
2633 {
2634 if (!t.IsGenericType)
2635 return t;
2636 // Micro-optimization: a generic typebuilder is always a generic type definition
2637 if (t is TypeBuilder)
2638 return t;
2639 return t.GetGenericTypeDefinition ();
2640 }
2641
2642 public static MethodBase DropGenericMethodArguments (MethodBase m)
2643 {
2644 if (m.IsGenericMethod)
2645 m = ((MethodInfo) m).GetGenericMethodDefinition ();
2646
2647 Type t = m.DeclaringType;
2648 if (!t.IsGenericType || t.IsGenericTypeDefinition)
2649 return m;
2650
2651 t = t.GetGenericTypeDefinition ();
2652 BindingFlags bf = BindingFlags.Public | BindingFlags.NonPublic |
2653 BindingFlags.Static | BindingFlags.Instance | BindingFlags.DeclaredOnly;
2654
2655 #if MS_COMPATIBLE
2656 // TODO: use CodeGen.Module.Builder.ResolveMethod ()
2657 return m;
2658 #endif
2659
2660 if (m is ConstructorInfo) {
2661 foreach (ConstructorInfo c in t.GetConstructors (bf))
2662 if (c.MetadataToken == m.MetadataToken)
2663 return c;
2664 } else {
2665 foreach (MethodBase mb in t.GetMethods (bf))
2666 if (mb.MetadataToken == m.MetadataToken)
2667 return mb;
2668 }
2669
2670 return m;
2671 }
2672
2673 public static Type[] GetGenericArguments (MethodBase mi)
2674 {
2675 return mi.GetGenericArguments () ?? Type.EmptyTypes;
2676 }
2677
2678 public static Type[] GetTypeArguments (Type t)
2679 {
2680 DeclSpace tc = LookupDeclSpace (t);
2681 if (tc != null) {
2682 if (!tc.IsGeneric)
2683 return Type.EmptyTypes;
2684
2685 TypeParameter[] tparam = tc.TypeParameters;
2686 Type[] ret = new Type [tparam.Length];
2687 for (int i = 0; i < tparam.Length; i++) {
2688 ret [i] = tparam [i].Type;
2689 if (ret [i] == null)
2690 throw new InternalErrorException ();
2691 }
2692
2693 return ret;
2694 } else
2695 return t.GetGenericArguments ();
2696 }
2697
2698 public static GenericConstraints GetTypeParameterConstraints (Type t)
2699 {
2700 if (!t.IsGenericParameter)
2701 throw new InvalidOperationException ();
2702
2703 TypeParameter tparam = LookupTypeParameter (t);
2704 if (tparam != null)
2705 return tparam.GenericConstraints;
2706
2707 return ReflectionConstraints.GetConstraints (t);
2708 }
2709
2710 public static bool HasGenericArguments (Type t)
2711 {
2712 return GetNumberOfTypeArguments (t) > 0;
2713 }
2714
2715 public static int GetNumberOfTypeArguments (Type t)
2716 {
2717 if (t.IsGenericParameter)
2718 return 0;
2719 DeclSpace tc = LookupDeclSpace (t);
2720 if (tc != null)
2721 return tc.IsGeneric ? tc.CountTypeParameters : 0;
2722 else
2723 return t.IsGenericType ? t.GetGenericArguments ().Length : 0;
2724 }
2725
2726 /// <summary>
2727 /// Check whether `type' and `parent' are both instantiations of the same
2728 /// generic type. Note that we do not check the type parameters here.
2729 /// </summary>
2730 public static bool IsInstantiationOfSameGenericType (Type type, Type parent)
2731 {
2732 int tcount = GetNumberOfTypeArguments (type);
2733 int pcount = GetNumberOfTypeArguments (parent);
2734
2735 if (tcount != pcount)
2736 return false;
2737
2738 type = DropGenericTypeArguments (type);
2739 parent = DropGenericTypeArguments (parent);
2740
2741 return type.Equals (parent);
2742 }
2743
2744 /// <summary>
2745 /// Whether `mb' is a generic method definition.
2746 /// </summary>
2747 public static bool IsGenericMethodDefinition (MethodBase mb)
2748 {
2749 if (mb.DeclaringType is TypeBuilder) {
2750 IMethodData method = GetMethod (mb);
2751 if (method == null)
2752 return false;
2753
2754 return method.GenericMethod != null;
2755 }
2756
2757 return mb.IsGenericMethodDefinition;
2758 }
2759
2760 /// <summary>
2761 /// Whether `mb' is a generic method.
2762 /// </summary>
2763 public static bool IsGenericMethod (MethodBase mb)
2764 {
2765 return mb.IsGenericMethod;
2766 }
2767
2768 public static bool IsNullableType (Type t)
2769 {
2770 return generic_nullable_type == DropGenericTypeArguments (t);
2771 }
2772
2773 public static MethodInfo MakeGenericMethod (MethodInfo gmd, Type[] methodArguments)
2774 {
2775 if (!gmd.IsGenericMethodDefinition)
2776 gmd = gmd.GetGenericMethodDefinition ();
2777 return gmd.MakeGenericMethod (methodArguments);
2778 }
2779 #endregion
2780
2781 #region MemberLookup implementation
2782
2783 //
2784 // Whether we allow private members in the result (since FindMembers
2785 // uses NonPublic for both protected and private), we need to distinguish.
2786 //
2787
2788 internal class Closure {
2789 internal bool private_ok;
2790
2791 // Who is invoking us and which type is being queried currently.
2792 internal Type invocation_type;
2793 internal Type qualifier_type;
2794
2795 // The assembly that defines the type is that is calling us
2796 internal Assembly invocation_assembly;
2797 internal IList<MemberInfo> almost_match;
2798
2799 private bool CheckValidFamilyAccess (bool is_static, MemberInfo m)
2800 {
2801 if (invocation_type == null)
2802 return false;
2803
2804 if (is_static && qualifier_type == null)
2805 // It resolved from a simple name, so it should be visible.
2806 return true;
2807
2808 if (IsNestedChildOf (invocation_type, m.DeclaringType))
2809 return true;
2810
2811 for (Type t = invocation_type; t != null; t = t.DeclaringType) {
2812 if (!IsFamilyAccessible (t, m.DeclaringType))
2813 continue;
2814
2815 // Although a derived class can access protected members of its base class
2816 // it cannot do so through an instance of the base class (CS1540).
2817 // => Ancestry should be: declaring_type ->* invocation_type ->* qualified_type
2818 if (is_static || qualifier_type == null ||
2819 IsInstantiationOfSameGenericType (t, qualifier_type) ||
2820 IsFamilyAccessible (qualifier_type, t))
2821 return true;
2822 }
2823
2824 if (almost_match != null)
2825 almost_match.Add (m);
2826
2827 return false;
2828 }
2829
2830 //
2831 // This filter filters by name + whether it is ok to include private
2832 // members in the search
2833 //
2834 internal bool Filter (MemberInfo m, object filter_criteria)
2835 {
2836 //
2837 // Hack: we know that the filter criteria will always be in the
2838 // `closure' // fields.
2839 //
2840
2841 if ((filter_criteria != null) && (m.Name != (string) filter_criteria))
2842 return false;
2843
2844 if (((qualifier_type == null) || (qualifier_type == invocation_type)) &&
2845 (invocation_type != null) &&
2846 IsPrivateAccessible (m.DeclaringType, invocation_type))
2847 return true;
2848
2849 //
2850 // Ugly: we need to find out the type of `m', and depending
2851 // on this, tell whether we accept or not
2852 //
2853 if (m is MethodBase){
2854 MethodBase mb = (MethodBase) m;
2855 MethodAttributes ma = mb.Attributes & MethodAttributes.MemberAccessMask;
2856
2857 if (ma == MethodAttributes.Public)
2858 return true;
2859
2860 if (ma == MethodAttributes.PrivateScope)
2861 return false;
2862
2863 if (ma == MethodAttributes.Private)
2864 return private_ok ||
2865 IsPrivateAccessible (invocation_type, m.DeclaringType) ||
2866 IsNestedChildOf (invocation_type, m.DeclaringType);
2867
2868 if (TypeManager.IsThisOrFriendAssembly (invocation_assembly, mb.DeclaringType.Assembly)) {
2869 if (ma == MethodAttributes.Assembly || ma == MethodAttributes.FamORAssem)
2870 return true;
2871 } else {
2872 if (ma == MethodAttributes.Assembly || ma == MethodAttributes.FamANDAssem)
2873 return false;
2874 }
2875
2876 // Family, FamORAssem or FamANDAssem
2877 return CheckValidFamilyAccess (mb.IsStatic, m);
2878 }
2879
2880 if (m is FieldInfo){
2881 FieldInfo fi = (FieldInfo) m;
2882 FieldAttributes fa = fi.Attributes & FieldAttributes.FieldAccessMask;
2883
2884 if (fa == FieldAttributes.Public)
2885 return true;
2886
2887 if (fa == FieldAttributes.PrivateScope)
2888 return false;
2889
2890 if (fa == FieldAttributes.Private)
2891 return private_ok ||
2892 IsPrivateAccessible (invocation_type, m.DeclaringType) ||
2893 IsNestedChildOf (invocation_type, m.DeclaringType);
2894
2895 if (TypeManager.IsThisOrFriendAssembly (invocation_assembly, fi.DeclaringType.Assembly)) {
2896 if ((fa == FieldAttributes.Assembly) ||
2897 (fa == FieldAttributes.FamORAssem))
2898 return true;
2899 } else {
2900 if ((fa == FieldAttributes.Assembly) ||
2901 (fa == FieldAttributes.FamANDAssem))
2902 return false;
2903 }
2904
2905 // Family, FamORAssem or FamANDAssem
2906 return CheckValidFamilyAccess (fi.IsStatic, m);
2907 }
2908
2909 //
2910 // EventInfos and PropertyInfos, return true because they lack
2911 // permission information, so we need to check later on the methods.
2912 //
2913 return true;
2914 }
2915 }
2916
2917 static Closure closure;
2918 static MemberFilter FilterWithClosure_delegate;
2919
2920 //
2921 // Looks up a member called `name' in the `queried_type'. This lookup
2922 // is done by code that is contained in the definition for `invocation_type'
2923 // through a qualifier of type `qualifier_type' (or null if there is no qualifier).
2924 //
2925 // `invocation_type' is used to check whether we're allowed to access the requested
2926 // member wrt its protection level.
2927 //
2928 // When called from MemberAccess, `qualifier_type' is the type which is used to access
2929 // the requested member (`class B { A a = new A (); a.foo = 5; }'; here invocation_type
2930 // is B and qualifier_type is A). This is used to do the CS1540 check.
2931 //
2932 // When resolving a SimpleName, `qualifier_type' is null.
2933 //
2934 // The `qualifier_type' is used for the CS1540 check; it's normally either null or
2935 // the same than `queried_type' - except when we're being called from BaseAccess;
2936 // in this case, `invocation_type' is the current type and `queried_type' the base
2937 // type, so this'd normally trigger a CS1540.
2938 //
2939 // The binding flags are `bf' and the kind of members being looked up are `mt'
2940 //
2941 // The return value always includes private members which code in `invocation_type'
2942 // is allowed to access (using the specified `qualifier_type' if given); only use
2943 // BindingFlags.NonPublic to bypass the permission check.
2944 //
2945 // The 'almost_match' argument is used for reporting error CS1540.
2946 //
2947 // Returns an array of a single element for everything but Methods/Constructors
2948 // that might return multiple matches.
2949 //
2950 public static MemberInfo [] MemberLookup (Type invocation_type, Type qualifier_type,
2951 Type queried_type, MemberTypes mt,
2952 BindingFlags original_bf, string name, IList<MemberInfo> almost_match)
2953 {
2954 Timer.StartTimer (TimerType.MemberLookup);
2955
2956 MemberInfo[] retval = RealMemberLookup (invocation_type, qualifier_type,
2957 queried_type, mt, original_bf, name, almost_match);
2958
2959 Timer.StopTimer (TimerType.MemberLookup);
2960
2961 return retval;
2962 }
2963
2964 static MemberInfo [] RealMemberLookup (Type invocation_type, Type qualifier_type,
2965 Type queried_type, MemberTypes mt,
2966 BindingFlags original_bf, string name, IList<MemberInfo> almost_match)
2967 {
2968 BindingFlags bf = original_bf;
2969
2970 List<MethodBase> method_list = null;
2971 Type current_type = queried_type;
2972 bool searching = (original_bf & BindingFlags.DeclaredOnly) == 0;
2973 bool skip_iface_check = true, used_cache = false;
2974 bool always_ok_flag = invocation_type != null && IsNestedChildOf (invocation_type, queried_type);
2975
2976 closure.invocation_type = invocation_type;
2977 closure.invocation_assembly = invocation_type != null ? invocation_type.Assembly : null;
2978 closure.qualifier_type = qualifier_type;
2979 closure.almost_match = almost_match;
2980
2981 // This is from the first time we find a method
2982 // in most cases, we do not actually find a method in the base class
2983 // so we can just ignore it, and save the arraylist allocation
2984 MemberInfo [] first_members_list = null;
2985 bool use_first_members_list = false;
2986
2987 do {
2988 MemberInfo [] list;
2989
2990 //
2991 // `NonPublic' is lame, because it includes both protected and
2992 // private methods, so we need to control this behavior by
2993 // explicitly tracking if a private method is ok or not.
2994 //
2995 // The possible cases are:
2996 // public, private and protected (internal does not come into the
2997 // equation)
2998 //
2999 if ((invocation_type != null) &&
3000 ((invocation_type == current_type) ||
3001 IsNestedChildOf (invocation_type, current_type)) ||
3002 always_ok_flag)
3003 bf = original_bf | BindingFlags.NonPublic;
3004 else
3005 bf = original_bf;
3006
3007 closure.private_ok = (original_bf & BindingFlags.NonPublic) != 0;
3008
3009 Timer.StopTimer (TimerType.MemberLookup);
3010
3011 list = MemberLookup_FindMembers (current_type, mt, bf, name, out used_cache);
3012
3013 Timer.StartTimer (TimerType.MemberLookup);
3014
3015 //
3016 // When queried for an interface type, the cache will automatically check all
3017 // inherited members, so we don't need to do this here. However, this only
3018 // works if we already used the cache in the first iteration of this loop.
3019 //
3020 // If we used the cache in any further iteration, we can still terminate the
3021 // loop since the cache always looks in all base classes.
3022 //
3023
3024 if (used_cache)
3025 searching = false;
3026 else
3027 skip_iface_check = false;
3028
3029 if (current_type == TypeManager.object_type)
3030 searching = false;
3031 else {
3032 current_type = current_type.BaseType;
3033
3034 //
3035 // This happens with interfaces, they have a null
3036 // basetype. Look members up in the Object class.
3037 //
3038 if (current_type == null) {
3039 current_type = TypeManager.object_type;
3040 searching = true;
3041 }
3042 }
3043
3044 if (list.Length == 0)
3045 continue;
3046
3047 //
3048 // Events and types are returned by both `static' and `instance'
3049 // searches, which means that our above FindMembers will
3050 // return two copies of the same.
3051 //
3052 if (list.Length == 1 && !(list [0] is MethodBase)){
3053 return list;
3054 }
3055
3056 //
3057 // Multiple properties: we query those just to find out the indexer
3058 // name
3059 //
3060 if (list [0] is PropertyInfo)
3061 return list;
3062
3063 //
3064 // We found an event: the cache lookup returns both the event and
3065 // its private field.
3066 //
3067 if (list [0] is EventInfo) {
3068 if ((list.Length == 2) && (list [1] is FieldInfo))
3069 return new MemberInfo [] { list [0] };
3070
3071 return list;
3072 }
3073
3074 //
3075 // We found methods, turn the search into "method scan"
3076 // mode.
3077 //
3078
3079 if (first_members_list != null) {
3080 if (use_first_members_list) {
3081 method_list = CopyNewMethods (method_list, first_members_list);
3082 use_first_members_list = false;
3083 }
3084
3085 method_list = CopyNewMethods (method_list, list);
3086 } else {
3087 first_members_list = list;
3088 use_first_members_list = true;
3089 mt &= (MemberTypes.Method | MemberTypes.Constructor);
3090 }
3091 } while (searching);
3092
3093 if (use_first_members_list)
3094 return first_members_list;
3095
3096 if (method_list != null && method_list.Count > 0) {
3097 return method_list.ToArray ();
3098 }
3099 //
3100 // This happens if we already used the cache in the first iteration, in this case
3101 // the cache already looked in all interfaces.
3102 //
3103 if (skip_iface_check)
3104 return null;
3105
3106 //
3107 // Interfaces do not list members they inherit, so we have to
3108 // scan those.
3109 //
3110 if (!queried_type.IsInterface)
3111 return null;
3112
3113 if (queried_type.IsArray)
3114 queried_type = TypeManager.array_type;
3115
3116 Type [] ifaces = GetInterfaces (queried_type);
3117 if (ifaces == null)
3118 return null;
3119
3120 foreach (Type itype in ifaces){
3121 MemberInfo [] x;
3122
3123 x = MemberLookup (null, null, itype, mt, bf, name, null);
3124 if (x != null)
3125 return x;
3126 }
3127
3128 return null;
3129 }
3130
3131 public const BindingFlags AllMembers = BindingFlags.Public | BindingFlags.NonPublic |
3132 BindingFlags.Static | BindingFlags.Instance |
3133 BindingFlags.DeclaredOnly;
3134
3135 // Currently is designed to work with external types only
3136 public static PropertyInfo GetPropertyFromAccessor (MethodBase mb)
3137 {
3138 if (!mb.IsSpecialName)
3139 return null;
3140
3141 string name = mb.Name;
3142 if (name.Length < 5)
3143 return null;
3144
3145 if (name [3] != '_')
3146 return null;
3147
3148 if (name.StartsWith ("get") || name.StartsWith ("set")) {
3149 MemberInfo[] pi = mb.DeclaringType.FindMembers (MemberTypes.Property, AllMembers,
3150 Type.FilterName, name.Substring (4));
3151
3152 if (pi == null)
3153 return null;
3154
3155 // This can happen when property is indexer (it can have same name but different parameters)
3156 foreach (PropertyInfo p in pi) {
3157 foreach (MethodInfo p_mi in p.GetAccessors (true)) {
3158 if (p_mi == mb || TypeManager.GetParameterData (p_mi).Equals (TypeManager.GetParameterData (mb)))
3159 return p;
3160 }
3161 }
3162 }
3163
3164 return null;
3165 }
3166
3167 // Currently is designed to work with external types only
3168 public static MemberInfo GetEventFromAccessor (MethodBase mb)
3169 {
3170 if (!mb.IsSpecialName)
3171 return null;
3172
3173 string name = mb.Name;
3174 if (name.Length < 5)
3175 return null;
3176
3177 if (name.StartsWith ("add_"))
3178 return mb.DeclaringType.GetEvent (name.Substring (4), AllMembers);
3179
3180 if (name.StartsWith ("remove_"))
3181 return mb.DeclaringType.GetEvent (name.Substring (7), AllMembers);
3182
3183 return null;
3184 }
3185
3186 // Tests whether external method is really special
3187 public static bool IsSpecialMethod (MethodBase mb)
3188 {
3189 if (!mb.IsSpecialName)
3190 return false;
3191
3192 IMethodData md = TypeManager.GetMethod (mb);
3193 if (md != null)
3194 return (md is AbstractPropertyEventMethod || md is Operator);
3195
3196 PropertyInfo pi = GetPropertyFromAccessor (mb);
3197 if (pi != null)
3198 return IsValidProperty (pi);
3199
3200 if (GetEventFromAccessor (mb) != null)
3201 return true;
3202
3203 string name = mb.Name;
3204 if (name.StartsWith ("op_"))
3205 return Operator.GetName (name) != null;
3206
3207 return false;
3208 }
3209
3210 // Tests whether imported property is valid C# property.
3211 // TODO: It seems to me that we should do a lot of sanity tests before
3212 // we accept property as C# property
3213 static bool IsValidProperty (PropertyInfo pi)
3214 {
3215 MethodInfo get_method = pi.GetGetMethod (true);
3216 MethodInfo set_method = pi.GetSetMethod (true);
3217 int g_count = 0;
3218 int s_count = 0;
3219 if (get_method != null && set_method != null) {
3220 g_count = get_method.GetParameters ().Length;
3221 s_count = set_method.GetParameters ().Length;
3222 if (g_count + 1 != s_count)
3223 return false;
3224 } else if (get_method != null) {
3225 g_count = get_method.GetParameters ().Length;
3226 } else if (set_method != null) {
3227 s_count = set_method.GetParameters ().Length;
3228 }
3229
3230 //
3231 // DefaultMemberName and indexer name has to match to identify valid C# indexer
3232 //
3233 PredefinedAttribute pa = PredefinedAttributes.Get.DefaultMember;
3234 if ((s_count > 1 || g_count > 0) && pa.IsDefined) {
3235 object[] o = pi.DeclaringType.GetCustomAttributes (pa.Type, false);
3236 if (o.Length == 0)
3237 return false;
3238
3239 DefaultMemberAttribute dma = (DefaultMemberAttribute) o [0];
3240 if (dma.MemberName != pi.Name)
3241 return false;
3242 if (get_method != null && "get_" + dma.MemberName != get_method.Name)
3243 return false;
3244 if (set_method != null && "set_" + dma.MemberName != set_method.Name)
3245 return false;
3246 }
3247
3248 return true;
3249 }
3250
3251 #endregion
3252
3253 }
3254
3255 class InternalType
3256 {
3257 public static readonly Type AnonymousMethod = typeof (AnonymousMethodBody);
3258 public static readonly Type Arglist = typeof (ArglistAccess);
3259 public static readonly Type Dynamic = new DynamicType ();
3260 public static readonly Type MethodGroup = typeof (MethodGroupExpr);
3261 }
3262
3263 /// <summary>
3264 /// There is exactly one instance of this class per type.
3265 /// </summary>
3266 sealed class TypeHandle : IMemberContainer {
3267 public readonly IMemberContainer BaseType;
3268
3269 readonly int id = ++next_id;
3270 static int next_id = 0;
3271
3272 static TypeHandle ()
3273 {
3274 Reset ();
3275 }
3276
3277 /// <summary>
3278 /// Lookup a TypeHandle instance for the given type. If the type doesn't have
3279 /// a TypeHandle yet, a new instance of it is created. This static method
3280 /// ensures that we'll only have one TypeHandle instance per type.
3281 /// </summary>
3282 private static TypeHandle GetTypeHandle (Type t)
3283 {
3284 TypeHandle handle;
3285 if (type_hash.TryGetValue (t, out handle))
3286 return handle;
3287
3288 handle = new TypeHandle (t);
3289 type_hash.Add (t, handle);
3290 return handle;
3291 }
3292
3293 public static MemberCache GetMemberCache (Type t)
3294 {
3295 return GetTypeHandle (t).MemberCache;
3296 }
3297
3298 public static void CleanUp ()
3299 {
3300 type_hash = null;
3301 }
3302
3303 public static void Reset ()
3304 {
3305 type_hash = new Dictionary<Type, TypeHandle> (ReferenceEquality<Type>.Default);
3306 }
3307
3308 /// <summary>
3309 /// Returns the TypeHandle for TypeManager.object_type.
3310 /// </summary>
3311 public static IMemberContainer ObjectType {
3312 get {
3313 if (object_type != null)
3314 return object_type;
3315
3316 object_type = GetTypeHandle (TypeManager.object_type);
3317
3318 return object_type;
3319 }
3320 }
3321
3322 /// <summary>
3323 /// Returns the TypeHandle for TypeManager.array_type.
3324 /// </summary>
3325 public static TypeHandle ArrayType {
3326 get {
3327 if (array_type != null)
3328 return array_type;
3329
3330 array_type = GetTypeHandle (TypeManager.array_type);
3331
3332 return array_type;
3333 }
3334 }
3335
3336 static Dictionary<Type, TypeHandle> type_hash;
3337
3338 private static TypeHandle object_type;
3339 private static TypeHandle array_type;
3340
3341 private Type type;
3342 private string full_name;
3343 private bool is_interface;
3344 private MemberCache member_cache;
3345 private MemberCache base_cache;
3346
3347 private TypeHandle (Type type)
3348 {
3349 this.type = type;
3350 full_name = type.FullName != null ? type.FullName : type.Name;
3351 if (type.BaseType != null) {
3352 base_cache = TypeManager.LookupMemberCache (type.BaseType);
3353 BaseType = base_cache.Container;
3354 } else if (type.IsInterface)
3355 base_cache = TypeManager.LookupBaseInterfacesCache (type);
3356 this.is_interface = type.IsInterface || TypeManager.IsGenericParameter (type);
3357 this.member_cache = new MemberCache (this);
3358 }
3359
3360 // IMemberContainer methods
3361
3362 public string Name {
3363 get {
3364 return full_name;
3365 }
3366 }
3367
3368 public Type Type {
3369 get {
3370 return type;
3371 }
3372 }
3373
3374 public MemberCache BaseCache {
3375 get {
3376 return base_cache;
3377 }
3378 }
3379
3380 public bool IsInterface {
3381 get {
3382 return is_interface;
3383 }
3384 }
3385
3386 public MemberList GetMembers (MemberTypes mt, BindingFlags bf)
3387 {
3388 MemberInfo [] members;
3389
3390 if (type is GenericTypeParameterBuilder)
3391 return MemberList.Empty;
3392
3393 #if MS_COMPATIBLE
3394 type = TypeManager.DropGenericTypeArguments (type);
3395 #endif
3396 if (mt == MemberTypes.Event)
3397 members = type.GetEvents (bf | BindingFlags.DeclaredOnly);
3398 else
3399 members = type.FindMembers (mt, bf | BindingFlags.DeclaredOnly,
3400 null, null);
3401
3402 if (members.Length == 0)
3403 return MemberList.Empty;
3404
3405 Array.Reverse (members);
3406 return new MemberList (members);
3407 }
3408
3409 // IMemberFinder methods
3410
3411 public MemberList FindMembers (MemberTypes mt, BindingFlags bf, string name,
3412 MemberFilter filter, object criteria)
3413 {
3414 return new MemberList (member_cache.FindMembers (mt, bf, name, filter, criteria));
3415 }
3416
3417 public MemberCache MemberCache {
3418 get {
3419 return member_cache;
3420 }
3421 }
3422
3423 public override string ToString ()
3424 {
3425 if (BaseType != null)
3426 return "TypeHandle (" + id + "," + Name + " : " + BaseType + ")";
3427 else
3428 return "TypeHandle (" + id + "," + Name + ")";
3429 }
3430 }
3431 }
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