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**** Merged from MCS ****
[mono-project.git] / mcs / mbas / typemanager.cs
blob1b44fdf9534d63ae9505b3780deb74201f14188c
1 //
2 // typemanager.cs: C# type manager
3 //
4 // Author: Miguel de Icaza (miguel@gnu.org)
5 // Ravi Pratap (ravi@ximian.com)
6 //
7 // Licensed under the terms of the GNU GPL
8 //
9 // (C) 2001 Ximian, Inc (http://www.ximian.com)
10 //
11 //
12 using System;
13 using System.Globalization;
14 using System.Collections;
15 using System.Reflection;
16 using System.Reflection.Emit;
17 using System.Text.RegularExpressions;
18 using System.Runtime.CompilerServices;
19 using System.Diagnostics;
20
21 namespace Mono.MonoBASIC {
22
23 public class TypeManager {
24 //
25 // A list of core types that the compiler requires or uses
26 //
27 static public Type object_type;
28 static public Type value_type;
29 static public Type string_type;
30 static public Type int32_type;
31 static public Type uint32_type;
32 static public Type int64_type;
33 static public Type uint64_type;
34 static public Type float_type;
35 static public Type double_type;
36 static public Type char_type;
37 static public Type char_ptr_type;
38 static public Type short_type;
39 static public Type decimal_type;
40 static public Type date_type;
41 static public Type bool_type;
42 static public Type sbyte_type;
43 static public Type byte_type;
44 static public Type ushort_type;
45 static public Type enum_type;
46 static public Type delegate_type;
47 static public Type multicast_delegate_type;
48 static public Type void_type;
49 static public Type enumeration_type;
50 static public Type array_type;
51 static public Type runtime_handle_type;
52 static public Type icloneable_type;
53 static public Type type_type;
54 static public Type ienumerator_type;
55 static public Type idisposable_type;
56 static public Type default_member_type;
57 static public Type iasyncresult_type;
58 static public Type asynccallback_type;
59 static public Type intptr_type;
60 static public Type monitor_type;
61 static public Type runtime_field_handle_type;
62 static public Type attribute_type;
63 static public Type attribute_usage_type;
64 static public Type dllimport_type;
65 static public Type unverifiable_code_type;
66 static public Type methodimpl_attr_type;
67 static public Type marshal_as_attr_type;
68 static public Type param_array_type;
69 static public Type void_ptr_type;
70 static public Type indexer_name_type;
71 static public Type exception_type;
72 static public object obsolete_attribute_type;
73 static public object conditional_attribute_type;
74
75 //
76 // An empty array of types
77 //
78 static public Type [] NoTypes;
79
80
81 //
82 // Expressions representing the internal types. Used during declaration
83 // definition.
84 //
85 static public Expression system_object_expr, system_string_expr;
86 static public Expression system_boolean_expr, system_decimal_expr;
87 static public Expression system_single_expr, system_double_expr;
88 static public Expression system_sbyte_expr, system_byte_expr;
89 static public Expression system_int16_expr, system_uint16_expr;
90 static public Expression system_int32_expr, system_uint32_expr;
91 static public Expression system_int64_expr, system_uint64_expr;
92 static public Expression system_char_expr, system_void_expr;
93 static public Expression system_date_expr;
94 static public Expression system_asynccallback_expr;
95 static public Expression system_iasyncresult_expr;
96
97 //
98 // This is only used when compiling corlib
99 //
100 static public Type system_int32_type;
101 static public Type system_array_type;
102 static public Type system_type_type;
103 static public Type system_assemblybuilder_type;
104 static public MethodInfo system_int_array_get_length;
105 static public MethodInfo system_int_array_get_rank;
106 static public MethodInfo system_object_array_clone;
107 static public MethodInfo system_int_array_get_length_int;
108 static public MethodInfo system_int_array_get_lower_bound_int;
109 static public MethodInfo system_int_array_get_upper_bound_int;
110 static public MethodInfo system_void_array_copyto_array_int;
111 static public MethodInfo system_void_set_corlib_type_builders;
112
113
114 //
115 // Internal, not really used outside
116 //
117 static Type runtime_helpers_type;
118
119 //
120 // These methods are called by code generated by the compiler
121 //
122 static public MethodInfo string_concat_string_string;
123 static public MethodInfo string_concat_object_object;
124 static public MethodInfo string_isinterneted_string;
125 static public MethodInfo system_type_get_type_from_handle;
126 static public MethodInfo object_getcurrent_void;
127 static public MethodInfo bool_movenext_void;
128 static public MethodInfo void_dispose_void;
129 static public MethodInfo void_monitor_enter_object;
130 static public MethodInfo void_monitor_exit_object;
131 static public MethodInfo void_initializearray_array_fieldhandle;
132 static public MethodInfo int_getlength_int;
133 static public MethodInfo delegate_combine_delegate_delegate;
134 static public MethodInfo delegate_remove_delegate_delegate;
135 static public MethodInfo int_get_offset_to_string_data;
136 static public MethodInfo int_array_get_length;
137 static public MethodInfo int_array_get_rank;
138 static public MethodInfo object_array_clone;
139 static public MethodInfo int_array_get_length_int;
140 static public MethodInfo int_array_get_lower_bound_int;
141 static public MethodInfo int_array_get_upper_bound_int;
142 static public MethodInfo void_array_copyto_array_int;
143
144 //
145 // The attribute constructors.
146 //
147 static public ConstructorInfo cons_param_array_attribute;
148 static public ConstructorInfo void_decimal_ctor_five_args;
149 static public ConstructorInfo void_datetime_ctor_ticks_arg;
150 static public ConstructorInfo unverifiable_code_ctor;
151
152 // <remarks>
153 // Holds the Array of Assemblies that have been loaded
154 // (either because it is the default or the user used the
155 // -r command line option)
156 // </remarks>
157 static Assembly [] assemblies;
158
159 // <remarks>
160 // Keeps a list of module builders. We used this to do lookups
161 // on the modulebuilder using GetType -- needed for arrays
162 // </remarks>
163
164 // This is changed from list of ModuleBuilders
165 // to list of Modules for getting addmodule
166 // compiler option working
167 // Anirban - 13.07.2004
168
169 static System.Reflection.Module [] modules;
170
171 // <remarks>
172 // This is the type_cache from the assemblies to avoid
173 // hitting System.Reflection on every lookup.
174 // </summary>
175 static CaseInsensitiveHashtable types;
176
177 // <remarks>
178 // This is used to hotld the corresponding TypeContainer objects
179 // since we need this in FindMembers
180 // </remarks>
181 static CaseInsensitiveHashtable typecontainers;
182
183 // <remarks>
184 // Keeps track of those types that are defined by the
185 // user's program
186 // </remarks>
187 static ArrayList user_types;
188
189 static PtrHashtable builder_to_declspace;
190
191 // <remarks>
192 // Tracks the interfaces implemented by typebuilders. We only
193 // enter those who do implement or or more interfaces
194 // </remarks>
195 static PtrHashtable builder_to_ifaces;
196
197 // <remarks>
198 // Maps MethodBase.RuntimeTypeHandle to a Type array that contains
199 // the arguments to the method
200 // </remarks>
201 static Hashtable method_arguments;
202
203 // <remarks>
204 // Maps PropertyBuilder to a Type array that contains
205 // the arguments to the indexer
206 // </remarks>
207 static Hashtable indexer_arguments;
208
209 // <remarks>
210 // Maybe 'method_arguments' should be replaced and only
211 // method_internal_params should be kept?
212 // <remarks>
213 static Hashtable method_internal_params;
214
215 // <remarks>
216 // Keeps track of methods
217 // </remarks>
218
219 static Hashtable builder_to_method;
220
221 struct Signature {
222 public string name;
223 public Type [] args;
224 }
225
226 /// <summary>
227 /// A filter for Findmembers that uses the Signature object to
228 /// extract objects
229 /// </summary>
230 static bool SignatureFilter (MemberInfo mi, object criteria)
231 {
232 Signature sig = (Signature) criteria;
233
234 if (!(mi is MethodBase))
235 return false;
236
237 if (mi.Name != sig.name)
238 return false;
239
240 int count = sig.args.Length;
241
242 if (mi is MethodBuilder || mi is ConstructorBuilder){
243 Type [] candidate_args = GetArgumentTypes ((MethodBase) mi);
244
245 if (candidate_args.Length != count)
246 return false;
247
248 for (int i = 0; i < count; i++)
249 if (candidate_args [i] != sig.args [i])
250 return false;
251
252 return true;
253 } else {
254 ParameterInfo [] pars = ((MethodBase) mi).GetParameters ();
255
256 if (pars.Length != count)
257 return false;
258
259 for (int i = 0; i < count; i++)
260 if (pars [i].ParameterType != sig.args [i])
261 return false;
262 return true;
263 }
264 }
265
266 // A delegate that points to the filter above.
267 static MemberFilter signature_filter;
268
269 //
270 // These are expressions that represent some of the internal data types, used
271 // elsewhere
272 //
273 static void InitExpressionTypes ()
274 {
275 system_object_expr = new TypeLookupExpression ("System.Object");
276 system_string_expr = new TypeLookupExpression ("System.String");
277 system_boolean_expr = new TypeLookupExpression ("System.Boolean");
278 system_decimal_expr = new TypeLookupExpression ("System.Decimal");
279 system_single_expr = new TypeLookupExpression ("System.Single");
280 system_double_expr = new TypeLookupExpression ("System.Double");
281 system_sbyte_expr = new TypeLookupExpression ("System.SByte");
282 system_byte_expr = new TypeLookupExpression ("System.Byte");
283 system_int16_expr = new TypeLookupExpression ("System.Int16");
284 system_uint16_expr = new TypeLookupExpression ("System.UInt16");
285 system_int32_expr = new TypeLookupExpression ("System.Int32");
286 system_uint32_expr = new TypeLookupExpression ("System.UInt32");
287 system_int64_expr = new TypeLookupExpression ("System.Int64");
288 system_uint64_expr = new TypeLookupExpression ("System.UInt64");
289 system_char_expr = new TypeLookupExpression ("System.Char");
290 system_void_expr = new TypeLookupExpression ("System.Void");
291 system_date_expr = new TypeLookupExpression ("System.DateTime");
292 system_asynccallback_expr = new TypeLookupExpression ("System.AsyncCallback");
293 system_iasyncresult_expr = new TypeLookupExpression ("System.IAsyncResult");
294 }
295
296 static TypeManager ()
297 {
298 assemblies = new Assembly [0];
299 modules = null;
300 user_types = new ArrayList ();
301
302 types = new CaseInsensitiveHashtable ();
303 negative_hits = new CaseInsensitiveHashtable ();
304 typecontainers = new CaseInsensitiveHashtable ();
305
306 builder_to_declspace = new PtrHashtable ();
307 builder_to_method = new PtrHashtable ();
308 method_arguments = new PtrHashtable ();
309 method_internal_params = new PtrHashtable ();
310 indexer_arguments = new PtrHashtable ();
311 builder_to_ifaces = new PtrHashtable ();
312
313 NoTypes = new Type [0];
314
315 signature_filter = new MemberFilter (SignatureFilter);
316 InitExpressionTypes ();
317 }
318
319 public static void AddUserType (string name, TypeBuilder t, Type [] ifaces)
320 {
321 try {
322 types.Add (name, t);
323 } catch {
324 Type prev = (Type) types [name];
325 TypeContainer tc = builder_to_declspace [prev] as TypeContainer;
326
327 if (tc != null){
328 //
329 // This probably never happens, as we catch this before
330 //
331 Report.Error (-17, "The type '" + name + "' has already been defined.");
332 return;
333 }
334
335 tc = builder_to_declspace [t] as TypeContainer;
336
337 Report.Warning (
338 1595, "The type '" + name + "' is defined in an existing assembly;"+
339 " Using the new definition from: " + tc.Location);
340 Report.Warning (1595, "Previously defined in: " + prev.Assembly.FullName);
341
342 types.Remove (name);
343 types.Add (name, t);
344 }
345 user_types.Add (t);
346
347 if (ifaces != null)
348 builder_to_ifaces [t] = ifaces;
349 }
350
351 //
352 // This entry point is used by types that we define under the covers
353 //
354 public static void RegisterBuilder (TypeBuilder tb, Type [] ifaces)
355 {
356 if (ifaces != null)
357 builder_to_ifaces [tb] = ifaces;
358 }
359
360 public static void AddUserType (string name, TypeBuilder t, TypeContainer tc, Type [] ifaces)
361 {
362 builder_to_declspace.Add (t, tc);
363 typecontainers.Add (name, tc);
364 AddUserType (name, t, ifaces);
365 }
366
367 public static void AddDelegateType (string name, TypeBuilder t, Delegate del)
368 {
369 types.Add (name, t);
370 builder_to_declspace.Add (t, del);
371 }
372
373 public static void AddEnumType (string name, TypeBuilder t, Enum en)
374 {
375 types.Add (name, t);
376 builder_to_declspace.Add (t, en);
377 }
378
379 public static void AddUserInterface (string name, TypeBuilder t, Interface i, Type [] ifaces)
380 {
381 AddUserType (name, t, ifaces);
382 builder_to_declspace.Add (t, i);
383 }
384
385 public static void AddMethod (MethodBuilder builder, MethodData method)
386 {
387 builder_to_method.Add (builder, method);
388 }
389
390 /// <summary>
391 /// Returns the TypeContainer whose Type is 't' or null if there is no
392 /// TypeContainer for 't' (ie, the Type comes from a library)
393 /// </summary>
394 public static TypeContainer LookupTypeContainer (Type t)
395 {
396 return builder_to_declspace [t] as TypeContainer;
397 }
398
399 public static IMemberContainer LookupMemberContainer (Type t)
400 {
401 if (t is TypeBuilder) {
402 IMemberContainer container = builder_to_declspace [t] as IMemberContainer;
403 if (container != null)
404 return container;
405 }
406
407 return TypeHandle.GetTypeHandle (t);
408 }
409
410 public static Interface LookupInterface (Type t)
411 {
412 return builder_to_declspace [t] as Interface;
413 }
414
415 public static Delegate LookupDelegate (Type t)
416 {
417 return builder_to_declspace [t] as Delegate;
418 }
419
420 public static Enum LookupEnum (Type t)
421 {
422 return builder_to_declspace [t] as Enum;
423 }
424
425 public static TypeContainer LookupClass (Type t)
426 {
427 return builder_to_declspace [t] as TypeContainer;
428 }
429
430 /// <summary>
431 /// Registers an assembly to load types from.
432 /// </summary>
433 public static void AddAssembly (Assembly a)
434 {
435 int top = assemblies.Length;
436 Assembly [] n = new Assembly [top + 1];
437
438 assemblies.CopyTo (n, 0);
439
440 n [top] = a;
441 assemblies = n;
442
443 foreach(Type type in a.GetTypes()) {
444 if (type.IsPublic ) // && type. attributed as standard module
445 AddStandardModule(type);
446 }
447 }
448
449 /// <summary>
450 /// Registers a module builder to lookup types from
451 /// </summary>
452 public static void AddModule (System.Reflection.Module mb)
453 {
454 int top = modules != null ? modules.Length : 0;
455 System.Reflection.Module [] n = new System.Reflection.Module [top + 1];
456
457 if (modules != null)
458 modules.CopyTo (n, 0);
459 n [top] = mb;
460 modules = n;
461 }
462
463 private class StandardModule {
464 public readonly string Namespace;
465 public readonly string Name;
466 private readonly string asString;
467 public StandardModule(string _namespace, string name) {
468 Namespace = _namespace;
469 Name = name;
470 asString = ((Namespace != null && Namespace.Length > 0)?(Namespace + "."):"") + Name;
471 }
472 public override string ToString() { return asString; }
473 }
474
475 private static StandardModule[] standardModules;
476
477 /// <summary>
478 /// Registers a new 'standard module' to lookup short-qualified or unqualified members
479 /// </summary>
480 internal static void AddStandardModule(Module module)
481 {
482 int top = standardModules != null ? standardModules.Length : 0;
483 StandardModule [] n = new StandardModule [top + 1];
484
485 if (standardModules != null)
486 standardModules.CopyTo (n, 0);
487 string name = module.Name;
488 int split = name.LastIndexOf('.');
489 if (split > 0)
490 name = name.Substring(split+1);
491 n [top] = new StandardModule(module.Namespace.Name, name);
492 // Console.WriteLine("Standard Module added: " + n [top]);
493 standardModules = n;
494 }
495
496 ///
497 /// Registers a existing 'standard module' to lookup short-qualified or unqualified members
498 ///
499 private static void AddStandardModule(Type type)
500 {
501 object[] attributes = type.GetCustomAttributes(false);
502 for (int i = 0; i < attributes.Length; i ++) {
503 if (attributes[i].ToString() == "Microsoft.VisualBasic.CompilerServices.StandardModuleAttribute") {
504 int top = standardModules != null ? standardModules.Length : 0;
505 StandardModule [] n = new StandardModule [top + 1];
506
507 if (standardModules != null)
508 standardModules.CopyTo (n, 0);
509 n [top] = new StandardModule(type.Namespace, type.Name) ;
510 standardModules = n;
511 return;
512 }
513 }
514 }
515
516 //
517 //
518 //
519 public static Type[] GetPertinentStandardModules(params string[] namespaces)
520 {
521 ArrayList list = new ArrayList();
522 foreach(string Namespace in namespaces)
523 {
524 for(int i = 0; i < standardModules.Length; i++) {
525 if (standardModules[i].Namespace == Namespace) {
526 string name = standardModules[i].ToString();
527 Type t = LookupType(name);
528 if (t == null) {
529 System.Console.WriteLine("Could not find standard module '" + name + "'");
530 }
531 else {
532 list.Add(t);
533 }
534 }
535 }
536 }
537 return (Type[])list.ToArray(typeof(Type));
538 }
539
540 //
541 // Low-level lookup, cache-less
542 //
543 static Type LookupTypeReflection (string name)
544 {
545 Type t;
546
547 try {
548 foreach (Assembly a in assemblies){
549 t = a.GetType (name, false, true);
550 if (t != null)
551 return t;
552 }
553
554 foreach (System.Reflection.Module mb in modules) {
555 t = mb.GetType (name, false, true);
556 if (t != null){
557 return t;
558 }
559 }
560 } catch (Exception e) {
561 System.Console.WriteLine("\nERROR: " + e.ToString() + "WHILE EXECUTING LookupTypeReflection(\"" + name + "\")\n");
562 }
563 return null;
564 }
565
566 static CaseInsensitiveHashtable negative_hits;
567 //
568 // This function is used when you want to avoid the lookups, and want to go
569 // directly to the source. This will use the cache.
570 //
571 // Notice that bypassing the cache is bad, because on Microsoft.NET runtime
572 // GetType ("DynamicType[]") != GetType ("DynamicType[]"), and there is no
573 // way to test things other than doing a fullname compare
574 //
575 public static Type LookupTypeDirect (string name)
576 {
577 Type t = (Type) types [name];
578 if (t != null)
579 return t;
580
581 if (negative_hits.Contains (name))
582 return null;
583 t = LookupTypeReflection (name);
584 if (t == null)
585 negative_hits [name] = null;
586 else
587 types [name] = t;
588 return t;
589 }
590
591 /// <summary>
592 /// Returns the Type associated with @name, takes care of the fact that
593 /// reflection expects nested types to be separated from the main type
594 /// with a "+" instead of a "."
595 /// </summary>
596 public static Type LookupType (string name)
597 {
598 Type t;
599
600 //
601 // First lookup in user defined and cached values
602 //
603
604 t = (Type) types [name];
605 if (t != null)
606 return t;
607
608 if (negative_hits.Contains (name))
609 return null;
610
611 //
612 // Optimization: ComposedCast will work with an existing type, and might already have the
613 // full name of the type, so the full system lookup can probably be avoided.
614 //
615
616 string [] elements = name.Split ('.');
617 int count = elements.Length;
618
619 for (int n = 1; n <= count; n++){
620 string top_level_type = String.Join (".", elements, 0, n);
621
622 if (negative_hits.Contains (top_level_type))
623 continue;
624
625 t = (Type) types [top_level_type];
626 if (t == null){
627 t = LookupTypeReflection (top_level_type);
628 if (t == null){
629 negative_hits [top_level_type] = null;
630 continue;
631 }
632 }
633
634 if (count == n){
635 types [name] = t;
636 return t;
637 }
638
639 string newt = top_level_type + "+" + String.Join ("+", elements, n, count - n);
640 t = LookupTypeReflection (newt);
641 if (t == null)
642 negative_hits [name] = null;
643 else
644 types [name] = t;
645 return t;
646 }
647 negative_hits [name] = null;
648 return null;
649 }
650
651 //
652 // Returns a list of all namespaces in the assemblies and types loaded.
653 //
654 public static CaseInsensitiveHashtable GetNamespaces ()
655 {
656 CaseInsensitiveHashtable namespaces = new CaseInsensitiveHashtable ();
657
658 foreach (Assembly a in assemblies) {
659 foreach (Type t in a.GetTypes ()) {
660 string ns = t.Namespace;
661
662 if (namespaces.Contains (ns))
663 continue;
664 namespaces [ns] = ns;
665 }
666 }
667
668 foreach (System.Reflection.Module mb in modules) {
669 foreach (Type t in mb.GetTypes ()) {
670 string ns = t.Namespace;
671
672 if (namespaces.Contains (ns))
673 continue;
674 namespaces [ns] = ns;
675 }
676 }
677
678 return namespaces;
679 }
680
681 /// <summary>
682 /// Returns the C# name of a type if possible, or the full type name otherwise
683 /// </summary>
684 static public string MonoBASIC_Name (Type t)
685 {
686 return Regex.Replace (t.FullName,
687 @"^System\." +
688 @"(Int32|Int16|Int64|Single|Double|Char|Decimal|Byte|Object|Boolean|String|DateTime)" +
689 @"(\W+|\b)",
690 new MatchEvaluator (MonoBASIC_NameMatch));
691 }
692
693 static String MonoBASIC_NameMatch (Match match)
694 {
695 string s = match.Groups [1].Captures [0].Value;
696 return s.ToLower ().
697 Replace ("int32", "integer").
698 Replace ("int16", "short").
699 Replace ("int64", "long").
700 Replace ("datetime", "date")
701 + match.Groups [2].Captures [0].Value;
702 }
703
704 /// <summary>
705 /// Returns the signature of the method
706 /// </summary>
707 static public string MonoBASIC_Signature (MethodBase mb)
708 {
709 string sig = "(";
710
711 //
712 // FIXME: We should really have a single function to do
713 // everything instead of the following 5 line pattern
714 //
715 ParameterData iparams = LookupParametersByBuilder (mb);
716
717 if (iparams == null){
718 ParameterInfo [] pi = mb.GetParameters ();
719 iparams = new ReflectionParameters (pi);
720 }
721
722 for (int i = 0; i < iparams.Count; i++) {
723 if (i > 0) {
724 sig += ", ";
725 }
726 sig += iparams.ParameterDesc(i);
727 }
728 sig += ")";
729
730 return mb.DeclaringType.Name + "." + mb.Name + sig;
731 }
732
733 /// <summary>
734 /// Looks up a type, and aborts if it is not found. This is used
735 /// by types required by the compiler
736 /// </summary>
737 static Type CoreLookupType (string name)
738 {
739 Type t = LookupType (name);
740
741 if (t == null){
742 Report.Error (518, "The predefined type '" + name + "' is not defined or imported");
743 Environment.Exit (0);
744 }
745
746 return t;
747 }
748
749 /// <summary>
750 /// Returns the MethodInfo for a method named 'name' defined
751 /// in type 't' which takes arguments of types 'args'
752 /// </summary>
753 static MethodInfo GetMethod (Type t, string name, Type [] args)
754 {
755 MemberList list;
756 Signature sig;
757
758 sig.name = name;
759 sig.args = args;
760
761 list = FindMembers (t, MemberTypes.Method, instance_and_static | BindingFlags.Public| BindingFlags.IgnoreCase,
762 signature_filter, sig);
763 if (list.Count == 0) {
764 Report.Error (-19, "Can not find the core function '" + name + "'");
765 return null;
766 }
767
768 MethodInfo mi = list [0] as MethodInfo;
769 if (mi == null) {
770 Report.Error (-19, "Can not find the core function '" + name + "'");
771 return null;
772 }
773
774 return mi;
775 }
776
777 /// <summary>
778 /// Returns the ConstructorInfo for "args"
779 /// </summary>
780 public static ConstructorInfo GetConstructor (Type t, Type [] args)
781 {
782 MemberList list;
783 Signature sig;
784
785 sig.name = ".ctor";
786 sig.args = args;
787
788 list = FindMembers (t, MemberTypes.Constructor,
789 instance_and_static | BindingFlags.Public | BindingFlags.DeclaredOnly | BindingFlags.IgnoreCase,
790 signature_filter, sig);
791 if (list.Count == 0){
792 Report.Error (-19, "Can not find the core constructor for type '" + t.Name + "'");
793 return null;
794 }
795
796 ConstructorInfo ci = list [0] as ConstructorInfo;
797 if (ci == null){
798 Report.Error (-19, "Can not find the core constructor for type '" + t.Name + "'");
799 return null;
800 }
801
802 return ci;
803 }
804
805 public static void InitEnumUnderlyingTypes ()
806 {
807
808 int32_type = CoreLookupType ("System.Int32");
809 int64_type = CoreLookupType ("System.Int64");
810 uint32_type = CoreLookupType ("System.UInt32");
811 uint64_type = CoreLookupType ("System.UInt64");
812 byte_type = CoreLookupType ("System.Byte");
813 sbyte_type = CoreLookupType ("System.SByte");
814 short_type = CoreLookupType ("System.Int16");
815 ushort_type = CoreLookupType ("System.UInt16");
816 }
817
818 /// <remarks>
819 /// The types have to be initialized after the initial
820 /// population of the type has happened (for example, to
821 /// bootstrap the corlib.dll
822 /// </remarks>
823 public static void InitCoreTypes ()
824 {
825 object_type = CoreLookupType ("System.Object");
826 value_type = CoreLookupType ("System.ValueType");
827
828 InitEnumUnderlyingTypes ();
829
830 char_type = CoreLookupType ("System.Char");
831 string_type = CoreLookupType ("System.String");
832 float_type = CoreLookupType ("System.Single");
833 double_type = CoreLookupType ("System.Double");
834 char_ptr_type = CoreLookupType ("System.Char*");
835 decimal_type = CoreLookupType ("System.Decimal");
836 bool_type = CoreLookupType ("System.Boolean");
837 enum_type = CoreLookupType ("System.Enum");
838
839 multicast_delegate_type = CoreLookupType ("System.MulticastDelegate");
840 delegate_type = CoreLookupType ("System.Delegate");
841
842 array_type = CoreLookupType ("System.Array");
843 void_type = CoreLookupType ("System.Void");
844 date_type = CoreLookupType ("System.DateTime");
845 type_type = CoreLookupType ("System.Type");
846
847 runtime_field_handle_type = CoreLookupType ("System.RuntimeFieldHandle");
848 runtime_helpers_type = CoreLookupType ("System.Runtime.CompilerServices.RuntimeHelpers");
849 default_member_type = CoreLookupType ("System.Reflection.DefaultMemberAttribute");
850 runtime_handle_type = CoreLookupType ("System.RuntimeTypeHandle");
851 asynccallback_type = CoreLookupType ("System.AsyncCallback");
852 iasyncresult_type = CoreLookupType ("System.IAsyncResult");
853 ienumerator_type = CoreLookupType ("System.Collections.IEnumerator");
854 idisposable_type = CoreLookupType ("System.IDisposable");
855 icloneable_type = CoreLookupType ("System.ICloneable");
856 monitor_type = CoreLookupType ("System.Threading.Monitor");
857 intptr_type = CoreLookupType ("System.IntPtr");
858
859 attribute_type = CoreLookupType ("System.Attribute");
860 attribute_usage_type = CoreLookupType ("System.AttributeUsageAttribute");
861 dllimport_type = CoreLookupType ("System.Runtime.InteropServices.DllImportAttribute");
862 methodimpl_attr_type = CoreLookupType ("System.Runtime.CompilerServices.MethodImplAttribute");
863 marshal_as_attr_type = CoreLookupType ("System.Runtime.InteropServices.MarshalAsAttribute");
864 param_array_type = CoreLookupType ("System.ParamArrayAttribute");
865
866 unverifiable_code_type= CoreLookupType ("System.Security.UnverifiableCodeAttribute");
867
868 void_ptr_type = CoreLookupType ("System.Void*");
869
870 indexer_name_type = CoreLookupType ("System.Runtime.CompilerServices.IndexerNameAttribute");
871
872 exception_type = CoreLookupType ("System.Exception");
873
874 //
875 // Attribute types
876 //
877 obsolete_attribute_type = CoreLookupType ("System.ObsoleteAttribute");
878 conditional_attribute_type = CoreLookupType ("System.Diagnostics.ConditionalAttribute");
879
880 //
881 // When compiling corlib, store the "real" types here.
882 //
883 if (!RootContext.StdLib) {
884 system_int32_type = typeof (System.Int32);
885 system_array_type = typeof (System.Array);
886 system_type_type = typeof (System.Type);
887 system_assemblybuilder_type = typeof (System.Reflection.Emit.AssemblyBuilder);
888
889 Type [] void_arg = { };
890 system_int_array_get_length = GetMethod (
891 system_array_type, "get_Length", void_arg);
892 system_int_array_get_rank = GetMethod (
893 system_array_type, "get_Rank", void_arg);
894 system_object_array_clone = GetMethod (
895 system_array_type, "Clone", void_arg);
896
897 Type [] system_int_arg = { system_int32_type };
898 system_int_array_get_length_int = GetMethod (
899 system_array_type, "GetLength", system_int_arg);
900 system_int_array_get_upper_bound_int = GetMethod (
901 system_array_type, "GetUpperBound", system_int_arg);
902 system_int_array_get_lower_bound_int = GetMethod (
903 system_array_type, "GetLowerBound", system_int_arg);
904
905 Type [] system_array_int_arg = { system_array_type, system_int32_type };
906 system_void_array_copyto_array_int = GetMethod (
907 system_array_type, "CopyTo", system_array_int_arg);
908
909 Type [] system_type_type_arg = { system_type_type, system_type_type, system_type_type };
910
911 try {
912 system_void_set_corlib_type_builders = GetMethod (
913 system_assemblybuilder_type, "SetCorlibTypeBuilders",
914 system_type_type_arg);
915
916 object[] args = new object [3];
917 args [0] = object_type;
918 args [1] = value_type;
919 args [2] = enum_type;
920
921 system_void_set_corlib_type_builders.Invoke (CodeGen.AssemblyBuilder, args);
922 } catch {
923 Console.WriteLine ("Corlib compilation is not supported in Microsoft.NET due to bugs in it");
924 }
925 }
926 }
927
928 //
929 // The helper methods that are used by the compiler
930 //
931 public static void InitCodeHelpers ()
932 {
933 //
934 // Now load the default methods that we use.
935 //
936 Type [] string_string = { string_type, string_type };
937 string_concat_string_string = GetMethod (
938 string_type, "Concat", string_string);
939
940 Type [] object_object = { object_type, object_type };
941 string_concat_object_object = GetMethod (
942 string_type, "Concat", object_object);
943
944 Type [] string_ = { string_type };
945 string_isinterneted_string = GetMethod (
946 string_type, "IsInterned", string_);
947
948 Type [] runtime_type_handle = { runtime_handle_type };
949 system_type_get_type_from_handle = GetMethod (
950 type_type, "GetTypeFromHandle", runtime_type_handle);
951
952 Type [] delegate_delegate = { delegate_type, delegate_type };
953 delegate_combine_delegate_delegate = GetMethod (
954 delegate_type, "Combine", delegate_delegate);
955
956 delegate_remove_delegate_delegate = GetMethod (
957 delegate_type, "Remove", delegate_delegate);
958
959 //
960 // Void arguments
961 //
962 Type [] void_arg = { };
963 object_getcurrent_void = GetMethod (
964 ienumerator_type, "get_Current", void_arg);
965 bool_movenext_void = GetMethod (
966 ienumerator_type, "MoveNext", void_arg);
967 void_dispose_void = GetMethod (
968 idisposable_type, "Dispose", void_arg);
969 int_get_offset_to_string_data = GetMethod (
970 runtime_helpers_type, "get_OffsetToStringData", void_arg);
971 int_array_get_length = GetMethod (
972 array_type, "get_Length", void_arg);
973 int_array_get_rank = GetMethod (
974 array_type, "get_Rank", void_arg);
975
976 //
977 // Int32 arguments
978 //
979 Type [] int_arg = { int32_type };
980 int_array_get_length_int = GetMethod (
981 array_type, "GetLength", int_arg);
982 int_array_get_upper_bound_int = GetMethod (
983 array_type, "GetUpperBound", int_arg);
984 int_array_get_lower_bound_int = GetMethod (
985 array_type, "GetLowerBound", int_arg);
986
987 //
988 // System.Array methods
989 //
990 object_array_clone = GetMethod (
991 array_type, "Clone", void_arg);
992 Type [] array_int_arg = { array_type, int32_type };
993 void_array_copyto_array_int = GetMethod (
994 array_type, "CopyTo", array_int_arg);
995
996 //
997 // object arguments
998 //
999 Type [] object_arg = { object_type };
1000 void_monitor_enter_object = GetMethod (
1001 monitor_type, "Enter", object_arg);
1002 void_monitor_exit_object = GetMethod (
1003 monitor_type, "Exit", object_arg);
1004
1005 Type [] array_field_handle_arg = { array_type, runtime_field_handle_type };
1006
1007 void_initializearray_array_fieldhandle = GetMethod (
1008 runtime_helpers_type, "InitializeArray", array_field_handle_arg);
1009
1010 //
1011 // Array functions
1012 //
1013 int_getlength_int = GetMethod (
1014 array_type, "GetLength", int_arg);
1015
1016 //
1017 // Decimal constructors
1018 //
1019 Type [] dec_arg = { int32_type, int32_type, int32_type, bool_type, byte_type };
1020 void_decimal_ctor_five_args = GetConstructor (
1021 decimal_type, dec_arg);
1022
1023 // DateTime constructor
1024 Type [] ticks_arg = { int64_type };
1025 void_datetime_ctor_ticks_arg = GetConstructor ( date_type, ticks_arg);
1026
1027 //
1028 // Attributes
1029 //
1030 cons_param_array_attribute = GetConstructor (
1031 param_array_type, void_arg);
1032
1033 unverifiable_code_ctor = GetConstructor (
1034 unverifiable_code_type, void_arg);
1035
1036 }
1037
1038 const BindingFlags instance_and_static = BindingFlags.Static | BindingFlags.Instance;
1039
1040 static CaseInsensitiveHashtable type_hash = new CaseInsensitiveHashtable ();
1041
1042 /// <remarks>
1043 /// This is the "old", non-cache based FindMembers() function. We cannot use
1044 /// the cache here because there is no member name argument.
1045 /// </remarks>
1046 public static MemberList FindMembers (Type t, MemberTypes mt, BindingFlags bf,
1047 MemberFilter filter, object criteria)
1048 {
1049 DeclSpace decl = (DeclSpace) builder_to_declspace [t];
1050 bf |= BindingFlags.IgnoreCase;
1051 //
1052 // 'builder_to_declspace' contains all dynamic types.
1053 //
1054 if (decl != null) {
1055 MemberList list;
1056 Timer.StartTimer (TimerType.FindMembers);
1057 list = decl.FindMembers (mt, bf, filter, criteria);
1058 Timer.StopTimer (TimerType.FindMembers);
1059 return list;
1060 }
1061
1062 //
1063 // We have to take care of arrays specially, because GetType on
1064 // a TypeBuilder array will return a Type, not a TypeBuilder,
1065 // and we can not call FindMembers on this type.
1066 //
1067 if (t.IsSubclassOf (TypeManager.array_type))
1068 return new MemberList (TypeManager.array_type.FindMembers (mt, bf, filter, criteria));
1069
1070 //
1071 // Since FindMembers will not lookup both static and instance
1072 // members, we emulate this behaviour here.
1073 //
1074 if ((bf & instance_and_static) == instance_and_static){
1075 MemberInfo [] i_members = t.FindMembers (
1076 mt, (bf & ~BindingFlags.Static) | BindingFlags.IgnoreCase, filter, criteria);
1077
1078 int i_len = i_members.Length;
1079 if (i_len == 1){
1080 MemberInfo one = i_members [0];
1081
1082 //
1083 // If any of these are present, we are done!
1084 //
1085 if ((one is Type) || (one is EventInfo) || (one is FieldInfo))
1086 return new MemberList (i_members);
1087 }
1088
1089 MemberInfo [] s_members = t.FindMembers (
1090 mt, (bf & ~BindingFlags.Instance) | BindingFlags.IgnoreCase, filter, criteria);
1091
1092 int s_len = s_members.Length;
1093 if (i_len > 0 || s_len > 0)
1094 return new MemberList (i_members, s_members);
1095 else {
1096 if (i_len > 0)
1097 return new MemberList (i_members);
1098 else
1099 return new MemberList (s_members);
1100 }
1101 }
1102
1103 return new MemberList (t.FindMembers (mt, bf, filter, criteria));
1104 }
1105
1106
1107 /// <summary>
1108 /// This method is only called from within MemberLookup. It tries to use the member
1109 /// cache if possible and falls back to the normal FindMembers if not. The 'used_cache'
1110 /// flag tells the caller whether we used the cache or not. If we used the cache, then
1111 /// our return value will already contain all inherited members and the caller don't need
1112 /// to check base classes and interfaces anymore.
1113 /// </summary>
1114 private static MemberList MemberLookup_FindMembers (Type t, MemberTypes mt, BindingFlags bf,
1115 string name, out bool used_cache)
1116 {
1117 //
1118 // We have to take care of arrays specially, because GetType on
1119 // a TypeBuilder array will return a Type, not a TypeBuilder,
1120 // and we can not call FindMembers on this type.
1121 //
1122 if (t.IsSubclassOf (TypeManager.array_type)) {
1123 used_cache = true;
1124 return TypeHandle.ArrayType.MemberCache.FindMembers (
1125 mt, bf, name, FilterWithClosure_delegate, null);
1126 }
1127
1128 //
1129 // If this is a dynamic type, it's always in the 'builder_to_declspace' hash table
1130 // and we can ask the DeclSpace for the MemberCache.
1131 //
1132 if (t is TypeBuilder) {
1133 DeclSpace decl = (DeclSpace) builder_to_declspace [t];
1134 MemberCache cache = decl.MemberCache;
1135
1136 //
1137 // If this DeclSpace has a MemberCache, use it.
1138 //
1139
1140 if (cache != null) {
1141 used_cache = true;
1142 return cache.FindMembers (
1143 mt, bf, name, FilterWithClosure_delegate, null);
1144 }
1145
1146 // If there is no MemberCache, we need to use the "normal" FindMembers.
1147
1148 MemberList list;
1149 Timer.StartTimer (TimerType.FindMembers);
1150 list = decl.FindMembers (mt, bf | BindingFlags.DeclaredOnly | BindingFlags.IgnoreCase,
1151 FilterWithClosure_delegate, name);
1152 Timer.StopTimer (TimerType.FindMembers);
1153 used_cache = false;
1154 return list;
1155 }
1156
1157 //
1158 // This call will always succeed. There is exactly one TypeHandle instance per
1159 // type, TypeHandle.GetTypeHandle() will either return it or create a new one
1160 // if it didn't already exist.
1161 //
1162 TypeHandle handle = TypeHandle.GetTypeHandle (t);
1163
1164 used_cache = true;
1165 return handle.MemberCache.FindMembers (mt, bf, name, FilterWithClosure_delegate, null);
1166 }
1167
1168 public static bool IsBuiltinType (Type t)
1169 {
1170 if (t == object_type || t == string_type || t == int32_type || t == uint32_type ||
1171 t == int64_type || t == uint64_type || t == float_type || t == double_type ||
1172 t == char_type || t == short_type || t == decimal_type || t == bool_type ||
1173 t == sbyte_type || t == byte_type || t == ushort_type || t == void_type ||
1174 t == date_type)
1175 return true;
1176 else
1177 return false;
1178 }
1179
1180 public static bool IsDelegateType (Type t)
1181 {
1182 if (t.IsSubclassOf (TypeManager.delegate_type))
1183 return true;
1184 else
1185 return false;
1186 }
1187
1188 public static bool IsEnumType (Type t)
1189 {
1190 if (t.IsSubclassOf (TypeManager.enum_type))
1191 return true;
1192 else
1193 return false;
1194 }
1195
1196 //
1197 // Whether a type is unmanaged. This is used by the unsafe code (25.2)
1198 //
1199 public static bool IsUnmanagedType (Type t)
1200 {
1201 if (IsBuiltinType (t) && t != TypeManager.string_type)
1202 return true;
1203
1204 if (IsEnumType (t))
1205 return true;
1206
1207 if (t.IsPointer)
1208 return true;
1209
1210 if (IsValueType (t)){
1211 if (t is TypeBuilder){
1212 TypeContainer tc = LookupTypeContainer (t);
1213
1214 foreach (Field f in tc.Fields){
1215 if (f.FieldBuilder.IsStatic)
1216 continue;
1217 if (!IsUnmanagedType (f.FieldBuilder.FieldType))
1218 return false;
1219 }
1220 } else {
1221 FieldInfo [] fields = t.GetFields ();
1222
1223 foreach (FieldInfo f in fields){
1224 if (f.IsStatic)
1225 continue;
1226 if (!IsUnmanagedType (f.FieldType))
1227 return false;
1228 }
1229 }
1230 return true;
1231 }
1232
1233 return false;
1234 }
1235
1236 public static bool IsValueType (Type t)
1237 {
1238 if (t.IsSubclassOf (TypeManager.value_type))
1239 return true;
1240 else
1241 return false;
1242 }
1243
1244 public static bool IsInterfaceType (Type t)
1245 {
1246 Interface iface = builder_to_declspace [t] as Interface;
1247
1248 if (iface != null)
1249 return true;
1250 else
1251 return false;
1252 }
1253
1254 //
1255 // Checks whether 'type' is a subclass or nested child of 'parent'.
1256 //
1257 public static bool IsSubclassOrNestedChildOf (Type type, Type parent)
1258 {
1259 do {
1260 if ((type == parent) || type.IsSubclassOf (parent))
1261 return true;
1262
1263 // Handle nested types.
1264 type = type.DeclaringType;
1265 } while (type != null);
1266
1267 return false;
1268 }
1269
1270 //
1271 // Checks whether 'type' is a nested child of 'parent'.
1272 //
1273 public static bool IsNestedChildOf (Type type, Type parent)
1274 {
1275 if ((type == parent) || type.IsSubclassOf (parent))
1276 return false;
1277 else
1278 return IsSubclassOrNestedChildOf (type, parent);
1279 }
1280
1281 /// <summary>
1282 /// Returns the User Defined Types
1283 /// </summary>
1284 public static ArrayList UserTypes {
1285 get {
1286 return user_types;
1287 }
1288 }
1289
1290 public static CaseInsensitiveHashtable TypeContainers {
1291 get {
1292 return typecontainers;
1293 }
1294 }
1295
1296 static Hashtable builder_to_constant;
1297
1298 public static void RegisterConstant (FieldBuilder fb, Const c)
1299 {
1300 if (builder_to_constant == null)
1301 builder_to_constant = new PtrHashtable ();
1302
1303 if (builder_to_constant.Contains (fb))
1304 return;
1305
1306 builder_to_constant.Add (fb, c);
1307 }
1308
1309 public static Const LookupConstant (FieldBuilder fb)
1310 {
1311 if (builder_to_constant == null)
1312 return null;
1313
1314 return (Const) builder_to_constant [fb];
1315 }
1316
1317 /// <summary>
1318 /// Gigantic work around for missing features in System.Reflection.Emit follows.
1319 /// </summary>
1320 ///
1321 /// <remarks>
1322 /// Since System.Reflection.Emit can not return MethodBase.GetParameters
1323 /// for anything which is dynamic, and we need this in a number of places,
1324 /// we register this information here, and use it afterwards.
1325 /// </remarks>
1326 static public bool RegisterMethod (MethodBase mb, InternalParameters ip, Type [] args)
1327 {
1328 if (args == null)
1329 args = NoTypes;
1330
1331 method_arguments.Add (mb, args);
1332 method_internal_params.Add (mb, ip);
1333
1334 return true;
1335 }
1336
1337 static public InternalParameters LookupParametersByBuilder (MethodBase mb)
1338 {
1339 if (! (mb is ConstructorBuilder || mb is MethodBuilder))
1340 return null;
1341
1342 if (method_internal_params.Contains (mb))
1343 return (InternalParameters) method_internal_params [mb];
1344 else
1345 throw new Exception ("Argument for Method not registered" + mb);
1346 }
1347
1348 /// <summary>
1349 /// Returns the argument types for a method based on its methodbase
1350 ///
1351 /// For dynamic methods, we use the compiler provided types, for
1352 /// methods from existing assemblies we load them from GetParameters,
1353 /// and insert them into the cache
1354 /// </summary>
1355 static public Type [] GetArgumentTypes (MethodBase mb)
1356 {
1357 if (method_arguments.Contains (mb))
1358 return (Type []) method_arguments [mb];
1359 else {
1360 ParameterInfo [] pi = mb.GetParameters ();
1361 int c = pi.Length;
1362 Type [] types = new Type [c];
1363
1364 for (int i = 0; i < c; i++)
1365 types [i] = pi [i].ParameterType;
1366
1367 method_arguments.Add (mb, types);
1368 return types;
1369 }
1370 }
1371
1372 /// <summary>
1373 /// Returns the argument types for an indexer based on its PropertyInfo
1374 ///
1375 /// For dynamic indexers, we use the compiler provided types, for
1376 /// indexers from existing assemblies we load them from GetParameters,
1377 /// and insert them into the cache
1378 /// </summary>
1379 static public Type [] GetArgumentTypes (PropertyInfo indexer)
1380 {
1381 if (indexer_arguments.Contains (indexer))
1382 return (Type []) indexer_arguments [indexer];
1383 else {
1384 // If we're a PropertyBuilder and not in the
1385 // 'indexer_arguments' hash, then we're a property and
1386 // not an indexer.
1387
1388 MethodInfo mi = indexer.GetSetMethod (true);
1389 if (mi == null) {
1390 mi = indexer.GetGetMethod (true);
1391 if (mi == null)
1392 return NoTypes;
1393 }
1394
1395 ParameterInfo [] pi = mi.GetParameters ();
1396 if (pi == null)
1397 return NoTypes;
1398
1399 int c = pi.Length;
1400 Type [] types = new Type [c];
1401
1402 for (int i = 0; i < c; i++)
1403 types [i] = pi [i].ParameterType;
1404
1405 indexer_arguments.Add (indexer, types);
1406 return types;
1407 }
1408 /*else
1409 {
1410 ParameterInfo [] pi = indexer.GetIndexParameters ();
1411 // Property, not an indexer.
1412 if (pi == null)
1413 return NoTypes;
1414 int c = pi.Length;
1415 Type [] types = new Type [c];
1416
1417 for (int i = 0; i < c; i++)
1418 types [i] = pi [i].ParameterType;
1419
1420 indexer_arguments.Add (indexer, types);
1421 return types;
1422 }*/
1423 }
1424
1425 // <remarks>
1426 // This is a workaround the fact that GetValue is not
1427 // supported for dynamic types
1428 // </remarks>
1429 static CaseInsensitiveHashtable fields = new CaseInsensitiveHashtable ();
1430 static public bool RegisterFieldValue (FieldBuilder fb, object value)
1431 {
1432 if (fields.Contains (fb))
1433 return false;
1434
1435 fields.Add (fb, value);
1436
1437 return true;
1438 }
1439
1440 static public object GetValue (FieldBuilder fb)
1441 {
1442 return fields [fb];
1443 }
1444
1445 static CaseInsensitiveHashtable fieldbuilders_to_fields = new CaseInsensitiveHashtable ();
1446 static public bool RegisterFieldBase (FieldBuilder fb, FieldBase f)
1447 {
1448 if (fieldbuilders_to_fields.Contains (fb))
1449 return false;
1450
1451 fieldbuilders_to_fields.Add (fb, f);
1452 return true;
1453 }
1454
1455 static public FieldBase GetField (FieldInfo fb)
1456 {
1457 return (FieldBase) fieldbuilders_to_fields [fb];
1458 }
1459
1460 static CaseInsensitiveHashtable events;
1461
1462 static public bool RegisterEvent (MyEventBuilder eb, MethodBase add, MethodBase remove)
1463 {
1464 if (events == null)
1465 events = new CaseInsensitiveHashtable ();
1466
1467 if (events.Contains (eb))
1468 return false;
1469
1470 events.Add (eb, new Pair (add, remove));
1471
1472 return true;
1473 }
1474
1475 static public MethodInfo GetAddMethod (EventInfo ei)
1476 {
1477 if (ei is MyEventBuilder) {
1478 Pair pair = (Pair) events [ei];
1479
1480 return (MethodInfo) pair.First;
1481 } else
1482 return ei.GetAddMethod ();
1483 }
1484
1485 static public MethodInfo GetRemoveMethod (EventInfo ei)
1486 {
1487 if (ei is MyEventBuilder) {
1488 Pair pair = (Pair) events [ei];
1489
1490 return (MethodInfo) pair.Second;
1491 } else
1492 return ei.GetAddMethod ();
1493 }
1494
1495 static CaseInsensitiveHashtable priv_fields_events;
1496
1497 static public bool RegisterPrivateFieldOfEvent (EventInfo einfo, FieldBuilder builder)
1498 {
1499 if (priv_fields_events == null)
1500 priv_fields_events = new CaseInsensitiveHashtable ();
1501
1502 if (priv_fields_events.Contains (einfo))
1503 return false;
1504
1505 priv_fields_events.Add (einfo, builder);
1506
1507 return true;
1508 }
1509
1510 static public MemberInfo GetPrivateFieldOfEvent (EventInfo ei)
1511 {
1512 return (MemberInfo) priv_fields_events [ei];
1513 }
1514
1515 static CaseInsensitiveHashtable properties;
1516
1517 static public bool RegisterProperty (PropertyBuilder pb, MethodBase get, MethodBase set)
1518 {
1519 if (properties == null)
1520 properties = new CaseInsensitiveHashtable ();
1521
1522 if (properties.Contains (pb))
1523 return false;
1524
1525 properties.Add (pb, new Pair (get, set));
1526
1527 return true;
1528 }
1529
1530 static public bool RegisterIndexer (PropertyBuilder pb, MethodBase get, MethodBase set, Type[] args)
1531 {
1532 if (!RegisterProperty (pb, get,set))
1533 return false;
1534
1535 indexer_arguments.Add (pb, args);
1536
1537 return true;
1538 }
1539
1540 static public MethodInfo GetPropertyGetter (PropertyInfo pi)
1541 {
1542 if (pi is PropertyBuilder){
1543 Pair de = (Pair) properties [pi];
1544
1545 return (MethodInfo) de.Second;
1546 } else
1547 return pi.GetSetMethod (true);
1548 }
1549
1550 static public MethodInfo GetPropertySetter (PropertyInfo pi)
1551 {
1552 if (pi is PropertyBuilder){
1553 Pair de = (Pair) properties [pi];
1554
1555 return (MethodInfo) de.First;
1556 } else
1557 return pi.GetGetMethod (true);
1558 }
1559
1560 /// <summary>
1561 /// Given an array of interface types, expand and eliminate repeated ocurrences
1562 /// of an interface.
1563 /// </summary>
1564 ///
1565 /// <remarks>
1566 /// This expands in context like: IA; IB : IA; IC : IA, IB; the interface "IC" to
1567 /// be IA, IB, IC.
1568 /// </remarks>
1569
1570 public static Type [] ExpandInterfaces (Type [] base_interfaces)
1571 {
1572 ArrayList new_ifaces = new ArrayList();
1573 ExpandAllInterfaces (base_interfaces, ref new_ifaces);
1574 Type [] ret = new Type [new_ifaces.Count];
1575 new_ifaces.CopyTo (ret, 0);
1576
1577 return ret;
1578 }
1579
1580 /// <summary>
1581 /// Recursively finds out each base interface in case
1582 /// of multiple inheritance
1583 /// </summary>
1584 public static void ExpandAllInterfaces
1585 (Type [] base_interfaces, ref ArrayList new_ifaces)
1586 {
1587 foreach (Type iface in base_interfaces) {
1588 if (!new_ifaces.Contains (iface))
1589 new_ifaces.Add (iface);
1590
1591 Type [] implementing = TypeManager.GetInterfaces (iface);
1592 //
1593 // Incase any base interface is present call this function again
1594 //
1595 if (implementing.Length != 0)
1596 ExpandAllInterfaces (implementing, ref new_ifaces);
1597 }
1598 }
1599
1600 /// <summary>
1601 /// This function returns the interfaces in the type 't'. Works with
1602 /// both types and TypeBuilders.
1603 /// </summary>
1604 public static Type [] GetInterfaces (Type t)
1605 {
1606 //
1607 // The reason for catching the Array case is that Reflection.Emit
1608 // will not return a TypeBuilder for Array types of TypeBuilder types,
1609 // but will still throw an exception if we try to call GetInterfaces
1610 // on the type.
1611 //
1612 // Since the array interfaces are always constant, we return those for
1613 // the System.Array
1614 //
1615
1616 if (t.IsArray)
1617 t = TypeManager.array_type;
1618
1619 if (t is TypeBuilder){
1620 Type [] parent_ifaces;
1621
1622 if (t.BaseType == null)
1623 parent_ifaces = NoTypes;
1624 else
1625 parent_ifaces = GetInterfaces (t.BaseType);
1626 Type [] type_ifaces = (Type []) builder_to_ifaces [t];
1627 if (type_ifaces == null)
1628 type_ifaces = NoTypes;
1629
1630 int parent_count = parent_ifaces.Length;
1631 Type [] result = new Type [parent_count + type_ifaces.Length];
1632 parent_ifaces.CopyTo (result, 0);
1633 type_ifaces.CopyTo (result, parent_count);
1634
1635 return result;
1636 } else
1637 return t.GetInterfaces ();
1638 }
1639
1640 /// <remarks>
1641 /// The following is used to check if a given type implements an interface.
1642 /// The cache helps us reduce the expense of hitting Type.GetInterfaces everytime.
1643 /// </remarks>
1644 public static bool ImplementsInterface (Type t, Type iface)
1645 {
1646 Type [] interfaces;
1647
1648 //
1649 // FIXME OPTIMIZATION:
1650 // as soon as we hit a non-TypeBuiler in the interface
1651 // chain, we could return, as the 'Type.GetInterfaces'
1652 // will return all the interfaces implement by the type
1653 // or its parents.
1654 //
1655 do {
1656 interfaces = GetInterfaces (t);
1657
1658 if (interfaces != null){
1659 foreach (Type i in interfaces){
1660 if (i == iface)
1661 return true;
1662 }
1663 }
1664
1665 t = t.BaseType;
1666 } while (t != null);
1667
1668 return false;
1669 }
1670
1671 // This is a custom version of Convert.ChangeType() which works
1672 // with the TypeBuilder defined types when compiling corlib.
1673 public static object ChangeType (object value, Type conversionType)
1674 {
1675 if (!(value is IConvertible))
1676 throw new ArgumentException ();
1677
1678 IConvertible convertValue = (IConvertible) value;
1679 CultureInfo ci = CultureInfo.CurrentCulture;
1680 NumberFormatInfo provider = ci.NumberFormat;
1681
1682 //
1683 // We must use Type.Equals() here since 'conversionType' is
1684 // the TypeBuilder created version of a system type and not
1685 // the system type itself. You cannot use Type.GetTypeCode()
1686 // on such a type - it'd always return TypeCode.Object.
1687 //
1688 if (conversionType.Equals (typeof (Boolean)))
1689 return (object)(convertValue.ToBoolean (provider));
1690 else if (conversionType.Equals (typeof (Byte)))
1691 return (object)(convertValue.ToByte (provider));
1692 else if (conversionType.Equals (typeof (Char)))
1693 return (object)(convertValue.ToChar (provider));
1694 else if (conversionType.Equals (typeof (DateTime)))
1695 return (object)(convertValue.ToDateTime (provider));
1696 else if (conversionType.Equals (typeof (Decimal)))
1697 return (object)(convertValue.ToDecimal (provider));
1698 else if (conversionType.Equals (typeof (Double)))
1699 return (object)(convertValue.ToDouble (provider));
1700 else if (conversionType.Equals (typeof (Int16)))
1701 return (object)(convertValue.ToInt16 (provider));
1702 else if (conversionType.Equals (typeof (Int32)))
1703 return (object)(convertValue.ToInt32 (provider));
1704 else if (conversionType.Equals (typeof (Int64)))
1705 return (object)(convertValue.ToInt64 (provider));
1706 else if (conversionType.Equals (typeof (SByte)))
1707 return (object)(convertValue.ToSByte (provider));
1708 else if (conversionType.Equals (typeof (Single)))
1709 return (object)(convertValue.ToSingle (provider));
1710 else if (conversionType.Equals (typeof (String)))
1711 return (object)(convertValue.ToString (provider));
1712 else if (conversionType.Equals (typeof (UInt16)))
1713 return (object)(convertValue.ToUInt16 (provider));
1714 else if (conversionType.Equals (typeof (UInt32)))
1715 return (object)(convertValue.ToUInt32 (provider));
1716 else if (conversionType.Equals (typeof (UInt64)))
1717 return (object)(convertValue.ToUInt64 (provider));
1718 else if (conversionType.Equals (typeof (Object)))
1719 return (object)(value);
1720 else
1721 throw new InvalidCastException ();
1722 }
1723
1724 //
1725 // This is needed, because enumerations from assemblies
1726 // do not report their underlyingtype, but they report
1727 // themselves
1728 //
1729 public static Type EnumToUnderlying (Type t)
1730 {
1731 if (t == TypeManager.enum_type)
1732 return t;
1733
1734 t = t.UnderlyingSystemType;
1735 if (!TypeManager.IsEnumType (t))
1736 return t;
1737
1738 if (t is TypeBuilder) {
1739 // slow path needed to compile corlib
1740 if (t == TypeManager.bool_type ||
1741 t == TypeManager.byte_type ||
1742 t == TypeManager.sbyte_type ||
1743 t == TypeManager.char_type ||
1744 t == TypeManager.short_type ||
1745 t == TypeManager.ushort_type ||
1746 t == TypeManager.int32_type ||
1747 t == TypeManager.uint32_type ||
1748 t == TypeManager.int64_type ||
1749 t == TypeManager.uint64_type)
1750 return t;
1751 throw new Exception ("Unhandled typecode in enum " + " from " + t.AssemblyQualifiedName);
1752 }
1753 TypeCode tc = Type.GetTypeCode (t);
1754
1755 switch (tc){
1756 case TypeCode.Boolean:
1757 return TypeManager.bool_type;
1758 case TypeCode.Byte:
1759 return TypeManager.byte_type;
1760 case TypeCode.SByte:
1761 return TypeManager.sbyte_type;
1762 case TypeCode.Char:
1763 return TypeManager.char_type;
1764 case TypeCode.Int16:
1765 return TypeManager.short_type;
1766 case TypeCode.UInt16:
1767 return TypeManager.ushort_type;
1768 case TypeCode.Int32:
1769 return TypeManager.int32_type;
1770 case TypeCode.UInt32:
1771 return TypeManager.uint32_type;
1772 case TypeCode.Int64:
1773 return TypeManager.int64_type;
1774 case TypeCode.UInt64:
1775 return TypeManager.uint64_type;
1776 }
1777 throw new Exception ("Unhandled typecode in enum " + tc + " from " + t.AssemblyQualifiedName);
1778 }
1779
1780 //
1781 // When compiling corlib and called with one of the core types, return
1782 // the corresponding typebuilder for that type.
1783 //
1784 public static Type TypeToCoreType (Type t)
1785 {
1786 if (RootContext.StdLib || (t is TypeBuilder))
1787 return t;
1788
1789 TypeCode tc = Type.GetTypeCode (t);
1790
1791 switch (tc){
1792 case TypeCode.Boolean:
1793 return TypeManager.bool_type;
1794 case TypeCode.Byte:
1795 return TypeManager.byte_type;
1796 case TypeCode.SByte:
1797 return TypeManager.sbyte_type;
1798 case TypeCode.Char:
1799 return TypeManager.char_type;
1800 case TypeCode.Int16:
1801 return TypeManager.short_type;
1802 case TypeCode.UInt16:
1803 return TypeManager.ushort_type;
1804 case TypeCode.Int32:
1805 return TypeManager.int32_type;
1806 case TypeCode.UInt32:
1807 return TypeManager.uint32_type;
1808 case TypeCode.Int64:
1809 return TypeManager.int64_type;
1810 case TypeCode.UInt64:
1811 return TypeManager.uint64_type;
1812 case TypeCode.String:
1813 return TypeManager.string_type;
1814 case TypeCode.DateTime:
1815 return TypeManager.date_type;
1816 default:
1817 if (t == typeof (void))
1818 return TypeManager.void_type;
1819 if (t == typeof (object))
1820 return TypeManager.object_type;
1821 if (t == typeof (System.Type))
1822 return TypeManager.type_type;
1823 return t;
1824 }
1825 }
1826
1827 /// <summary>
1828 /// Utility function that can be used to probe whether a type
1829 /// is managed or not.
1830 /// </summary>
1831 public static bool VerifyUnManaged (Type t, Location loc)
1832 {
1833 if (t.IsValueType || t.IsPointer){
1834 //
1835 // FIXME: this is more complex, we actually need to
1836 // make sure that the type does not contain any
1837 // classes itself
1838 //
1839 return true;
1840 }
1841
1842 if (!RootContext.StdLib && (t == TypeManager.decimal_type))
1843 // We need this explicit check here to make it work when
1844 // compiling corlib.
1845 return true;
1846
1847 Report.Error (
1848 208, loc,
1849 "Cannot take the address or size of a variable of a managed type ('" +
1850 MonoBASIC_Name (t) + "')");
1851 return false;
1852 }
1853
1854 /// <summary>
1855 /// Returns the name of the indexer in a given type.
1856 /// </summary>
1857 /// <remarks>
1858 /// The default is not always 'Item'. The user can change this behaviour by
1859 /// using the DefaultMemberAttribute in the class.
1860 ///
1861 /// For example, the String class indexer is named 'Chars' not 'Item'
1862 /// </remarks>
1863 public static string IndexerPropertyName (Type t)
1864 {
1865 if (t is TypeBuilder) {
1866 if (t.IsInterface) {
1867 Interface i = LookupInterface (t);
1868
1869 if ((i == null) || (i.IndexerName == null))
1870 return "Item";
1871
1872 return i.IndexerName;
1873 } else {
1874 TypeContainer tc = LookupTypeContainer (t);
1875
1876 if ((tc == null) || (tc.IndexerName == null))
1877 return "Item";
1878
1879 return tc.IndexerName;
1880 }
1881 }
1882
1883 System.Attribute attr = System.Attribute.GetCustomAttribute (
1884 t, TypeManager.default_member_type);
1885 if (attr != null){
1886 DefaultMemberAttribute dma = (DefaultMemberAttribute) attr;
1887 return dma.MemberName;
1888 }
1889
1890 return "Item";
1891 }
1892
1893 public static void MakePinned (LocalBuilder builder)
1894 {
1895 //
1896 // FIXME: Flag the "LocalBuilder" type as being
1897 // pinned. Figure out API.
1898 //
1899 }
1900
1901
1902 //
1903 // Returns whether the array of memberinfos contains the given method
1904 //
1905 static bool ArrayContainsMethod (MemberInfo [] array, MethodBase new_method)
1906 {
1907 Type [] new_args = TypeManager.GetArgumentTypes (new_method);
1908
1909 foreach (MethodBase method in array){
1910 if (method.Name != new_method.Name)
1911 continue;
1912
1913 Type [] old_args = TypeManager.GetArgumentTypes (method);
1914 int old_count = old_args.Length;
1915 int i;
1916
1917 if (new_args.Length != old_count)
1918 continue;
1919
1920 for (i = 0; i < old_count; i++){
1921 if (old_args [i] != new_args [i])
1922 break;
1923 }
1924 if (i != old_count)
1925 continue;
1926
1927 return true;
1928 }
1929 return false;
1930 }
1931
1932 //
1933 // We copy methods from 'new_members' into 'target_list' if the signature
1934 // for the method from in the new list does not exist in the target_list
1935 //
1936 // The name is assumed to be the same.
1937 //
1938 public static ArrayList CopyNewMethods (ArrayList target_list, MemberList new_members)
1939 {
1940 if (target_list == null){
1941 target_list = new ArrayList ();
1942
1943 foreach (MemberInfo mi in new_members){
1944 if (mi is MethodBase)
1945 target_list.Add (mi);
1946 }
1947 return target_list;
1948 }
1949
1950 MemberInfo [] target_array = new MemberInfo [target_list.Count];
1951 target_list.CopyTo (target_array, 0);
1952
1953 foreach (MemberInfo mi in new_members){
1954 MethodBase new_method = (MethodBase) mi;
1955
1956 if (!ArrayContainsMethod (target_array, new_method))
1957 target_list.Add (new_method);
1958 }
1959 return target_list;
1960 }
1961
1962 [Flags]
1963 public enum MethodFlags {
1964 IsObsolete = 1,
1965 IsObsoleteError = 2,
1966 ShouldIgnore = 3
1967 }
1968
1969 //
1970 // Returns the TypeManager.MethodFlags for this method.
1971 // This emits an error 619 / warning 618 if the method is obsolete.
1972 // In the former case, TypeManager.MethodFlags.IsObsoleteError is returned.
1973 //
1974 static public MethodFlags GetMethodFlags (MethodBase mb, Location loc)
1975 {
1976 MethodFlags flags = 0;
1977
1978 if (mb.DeclaringType is TypeBuilder){
1979 MethodData method = (MethodData) builder_to_method [mb];
1980 if (method == null) {
1981 // FIXME: implement Obsolete attribute on Property,
1982 // Indexer and Event.
1983 return 0;
1984 }
1985
1986 return method.GetMethodFlags (loc);
1987 }
1988
1989 object [] attrs = mb.GetCustomAttributes (true);
1990 foreach (object ta in attrs){
1991 if (!(ta is System.Attribute)){
1992 Console.WriteLine ("Unknown type in GetMethodFlags: " + ta);
1993 continue;
1994 }
1995 System.Attribute a = (System.Attribute) ta;
1996 if (a.TypeId == TypeManager.obsolete_attribute_type){
1997 ObsoleteAttribute oa = (ObsoleteAttribute) a;
1998
1999 string method_desc = TypeManager.MonoBASIC_Signature (mb);
2000
2001 if (oa.IsError) {
2002 Report.Error (619, loc, "Method '" + method_desc +
2003 "' is obsolete: '" + oa.Message + "'");
2004 return MethodFlags.IsObsoleteError;
2005 } else
2006 Report.Warning (618, loc, "Method '" + method_desc +
2007 "' is obsolete: '" + oa.Message + "'");
2008
2009 flags |= MethodFlags.IsObsolete;
2010
2011 continue;
2012 }
2013
2014 //
2015 // Skip over conditional code.
2016 //
2017 if (a.TypeId == TypeManager.conditional_attribute_type){
2018 ConditionalAttribute ca = (ConditionalAttribute) a;
2019
2020 if (RootContext.AllDefines [ca.ConditionString] == null)
2021 flags |= MethodFlags.ShouldIgnore;
2022 }
2023 }
2024
2025 return flags;
2026 }
2027
2028 #region MemberLookup implementation
2029
2030 //
2031 // Name of the member
2032 //
2033 static string closure_name;
2034
2035 //
2036 // Whether we allow private members in the result (since FindMembers
2037 // uses NonPublic for both protected and private), we need to distinguish.
2038 //
2039 static bool closure_private_ok;
2040
2041 //
2042 // Who is invoking us and which type is being queried currently.
2043 //
2044 static Type closure_invocation_type;
2045 static Type closure_queried_type;
2046 static Type closure_start_type;
2047
2048 //
2049 // The assembly that defines the type is that is calling us
2050 //
2051 static Assembly closure_invocation_assembly;
2052
2053 //
2054 // This filter filters by name + whether it is ok to include private
2055 // members in the search
2056 //
2057 static internal bool FilterWithClosure (MemberInfo m, object filter_criteria)
2058 {
2059 //
2060 // Hack: we know that the filter criteria will always be in the 'closure'
2061 // fields.
2062 //
2063
2064 if ((filter_criteria != null) && (m.Name != (string) filter_criteria))
2065 return false;
2066
2067 if ((closure_start_type == closure_invocation_type) &&
2068 (m.DeclaringType == closure_invocation_type))
2069 return true;
2070
2071 //
2072 // Ugly: we need to find out the type of 'm', and depending
2073 // on this, tell whether we accept or not
2074 //
2075 if (m is MethodBase){
2076 MethodBase mb = (MethodBase) m;
2077 MethodAttributes ma = mb.Attributes & MethodAttributes.MemberAccessMask;
2078
2079 if (ma == MethodAttributes.Private)
2080 return closure_private_ok || (closure_invocation_type == m.DeclaringType);
2081
2082 //
2083 // FamAndAssem requires that we not only derivate, but we are on the
2084 // same assembly.
2085 //
2086 if (ma == MethodAttributes.FamANDAssem){
2087 if (closure_invocation_assembly != mb.DeclaringType.Assembly)
2088 return false;
2089 }
2090
2091 // Assembly and FamORAssem succeed if we're in the same assembly.
2092 if ((ma == MethodAttributes.Assembly) || (ma == MethodAttributes.FamORAssem)){
2093 if (closure_invocation_assembly == mb.DeclaringType.Assembly)
2094 return true;
2095 }
2096
2097 // We already know that we aren't in the same assembly.
2098 if (ma == MethodAttributes.Assembly)
2099 return false;
2100
2101 // Family and FamANDAssem require that we derive.
2102 if ((ma == MethodAttributes.Family) || (ma == MethodAttributes.FamANDAssem)){
2103 if (closure_invocation_type == null)
2104 return false;
2105
2106 if (!IsSubclassOrNestedChildOf (closure_invocation_type, mb.DeclaringType))
2107 return false;
2108
2109 return true;
2110 }
2111
2112 // Public.
2113 return true;
2114 }
2115
2116 if (m is FieldInfo){
2117 FieldInfo fi = (FieldInfo) m;
2118 FieldAttributes fa = fi.Attributes & FieldAttributes.FieldAccessMask;
2119
2120 if (fa == FieldAttributes.Private)
2121 return closure_private_ok || (closure_invocation_type == m.DeclaringType);
2122
2123 //
2124 // FamAndAssem requires that we not only derivate, but we are on the
2125 // same assembly.
2126 //
2127 if (fa == FieldAttributes.FamANDAssem){
2128 if (closure_invocation_assembly != fi.DeclaringType.Assembly)
2129 return false;
2130 }
2131
2132 // Assembly and FamORAssem succeed if we're in the same assembly.
2133 if ((fa == FieldAttributes.Assembly) || (fa == FieldAttributes.FamORAssem)){
2134 if (closure_invocation_assembly == fi.DeclaringType.Assembly)
2135 return true;
2136 }
2137
2138 // We already know that we aren't in the same assembly.
2139 if (fa == FieldAttributes.Assembly)
2140 return false;
2141
2142 // Family and FamANDAssem require that we derive.
2143 if ((fa == FieldAttributes.Family) || (fa == FieldAttributes.FamANDAssem)){
2144 if (closure_invocation_type == null)
2145 return false;
2146
2147 if (!IsSubclassOrNestedChildOf (closure_invocation_type, fi.DeclaringType))
2148 return false;
2149
2150 // Although a derived class can access protected members of its base class
2151 // it cannot do so through an instance of the base class (CS1540).
2152 if ((closure_invocation_type != closure_start_type) &&
2153 closure_invocation_type.IsSubclassOf (closure_start_type))
2154 return false;
2155
2156 return true;
2157 }
2158
2159 // Public.
2160 return true;
2161 }
2162
2163 //
2164 // EventInfos and PropertyInfos, return true
2165 //
2166 return true;
2167 }
2168
2169 static MemberFilter FilterWithClosure_delegate = new MemberFilter (FilterWithClosure);
2170
2171 //
2172 // Looks up a member called 'name' in the 'queried_type'. This lookup
2173 // is done by code that is contained in the definition for 'invocation_type'.
2174 //
2175 // The binding flags are 'bf' and the kind of members being looked up are 'mt'
2176 //
2177 // Returns an array of a single element for everything but Methods/Constructors
2178 // that might return multiple matches.
2179 //
2180 public static MemberInfo [] MemberLookup (Type invocation_type, Type queried_type,
2181 MemberTypes mt, BindingFlags original_bf, string name)
2182 {
2183 Timer.StartTimer (TimerType.MemberLookup);
2184
2185 MemberInfo[] retval = RealMemberLookup (invocation_type, queried_type,
2186 mt, original_bf, name);
2187
2188 Timer.StopTimer (TimerType.MemberLookup);
2189
2190 return retval;
2191 }
2192
2193 static MemberInfo [] RealMemberLookup (Type invocation_type, Type queried_type,
2194 MemberTypes mt, BindingFlags original_bf, string name)
2195 {
2196 BindingFlags bf = original_bf;
2197
2198 ArrayList method_list = null;
2199 Type current_type = queried_type;
2200 if (queried_type == null)
2201 throw new ArgumentNullException("queried_type");
2202 bool searching = (original_bf & BindingFlags.DeclaredOnly) == 0;
2203 bool private_ok;
2204 bool always_ok_flag = false;
2205 bool skip_iface_check = true, used_cache = false;
2206
2207 closure_name = name;
2208 closure_invocation_type = invocation_type;
2209 closure_invocation_assembly = invocation_type != null ? invocation_type.Assembly : null;
2210 closure_start_type = queried_type;
2211
2212 //
2213 // If we are a nested class, we always have access to our container
2214 // type names
2215 //
2216 if (invocation_type != null){
2217 string invocation_name = invocation_type.FullName;
2218 if (invocation_name.IndexOf ('+') != -1){
2219 string container = queried_type.FullName + "+";
2220 int container_length = container.Length;
2221
2222 if (invocation_name.Length > container_length){
2223 string shared = invocation_name.Substring (0, container_length);
2224
2225 if (shared == container)
2226 always_ok_flag = true;
2227 }
2228 }
2229 }
2230
2231 do {
2232 MemberList list;
2233
2234 //
2235 // 'NonPublic' is lame, because it includes both protected and
2236 // private methods, so we need to control this behavior by
2237 // explicitly tracking if a private method is ok or not.
2238 //
2239 // The possible cases are:
2240 // public, private and protected (internal does not come into the
2241 // equation)
2242 //
2243 if (invocation_type != null){
2244 if (invocation_type == current_type){
2245 private_ok = (bf & BindingFlags.NonPublic) != 0;
2246 } else
2247 private_ok = always_ok_flag;
2248
2249 if (invocation_type.IsSubclassOf (current_type))
2250 private_ok = true;
2251
2252 if (private_ok)
2253 bf = original_bf | BindingFlags.NonPublic;
2254 } else {
2255 private_ok = false;
2256 bf = original_bf & ~BindingFlags.NonPublic;
2257 }
2258
2259 closure_private_ok = private_ok;
2260 closure_queried_type = current_type;
2261
2262 Timer.StopTimer (TimerType.MemberLookup);
2263 bf |= BindingFlags.IgnoreCase;
2264 list = MemberLookup_FindMembers (current_type, mt, bf, name, out used_cache);
2265
2266 Timer.StartTimer (TimerType.MemberLookup);
2267
2268 //
2269 // When queried for an interface type, the cache will automatically check all
2270 // inherited members, so we don't need to do this here. However, this only
2271 // works if we already used the cache in the first iteration of this loop.
2272 //
2273 // If we used the cache in any further iteration, we can still terminate the
2274 // loop since the cache always looks in all parent classes.
2275 //
2276
2277 if (used_cache)
2278 searching = false;
2279 else
2280 skip_iface_check = false;
2281
2282 if (current_type == TypeManager.object_type)
2283 searching = false;
2284 else {
2285 current_type = current_type.BaseType;
2286
2287 //
2288 // This happens with interfaces, they have a null
2289 // basetype. Look members up in the Object class.
2290 //
2291 if (current_type == null)
2292 current_type = TypeManager.object_type;
2293 }
2294
2295 if (list.Count == 0)
2296 continue;
2297
2298 //
2299 // Events and types are returned by both 'static' and 'instance'
2300 // searches, which means that our above FindMembers will
2301 // return two copies of the same.
2302 //
2303 if (list.Count == 1 && !(list [0] is MethodBase)){
2304 return (MemberInfo []) list;
2305 }
2306
2307 //
2308 // Multiple properties: we query those just to find out the indexer
2309 // name
2310 //
2311 if (list [0] is PropertyInfo)
2312 return (MemberInfo []) list;
2313
2314 //
2315 // We found methods, turn the search into "method scan"
2316 // mode.
2317 //
2318
2319 method_list = CopyNewMethods (method_list, list);
2320 mt &= (MemberTypes.Method | MemberTypes.Constructor);
2321 } while (searching);
2322
2323 if (method_list != null && method_list.Count > 0)
2324 return (MemberInfo []) method_list.ToArray (typeof (MemberInfo));
2325
2326 //
2327 // This happens if we already used the cache in the first iteration, in this case
2328 // the cache already looked in all interfaces.
2329 //
2330 if (skip_iface_check)
2331 return null;
2332
2333 //
2334 // Interfaces do not list members they inherit, so we have to
2335 // scan those.
2336 //
2337 if (!queried_type.IsInterface)
2338 return null;
2339
2340 if (queried_type.IsArray)
2341 queried_type = TypeManager.array_type;
2342
2343 Type [] ifaces = GetInterfaces (queried_type);
2344 if (ifaces == null)
2345 return null;
2346
2347 foreach (Type itype in ifaces){
2348 MemberInfo [] x;
2349
2350 x = MemberLookup (null, itype, mt, bf, name);
2351 if (x != null)
2352 return x;
2353 }
2354
2355 return null;
2356 }
2357 #endregion
2358
2359 }
2360
2361 /// <summary>
2362 /// There is exactly one instance of this class per type.
2363 /// </summary>
2364 public sealed class TypeHandle : IMemberContainer {
2365 public readonly TypeHandle BaseType;
2366
2367 readonly int id = ++next_id;
2368 static int next_id = 0;
2369
2370 /// <summary>
2371 /// Lookup a TypeHandle instance for the given type. If the type doesn't have
2372 /// a TypeHandle yet, a new instance of it is created. This static method
2373 /// ensures that we'll only have one TypeHandle instance per type.
2374 /// </summary>
2375 public static TypeHandle GetTypeHandle (Type t)
2376 {
2377 TypeHandle handle = (TypeHandle) type_hash [t];
2378 if (handle != null)
2379 return handle;
2380
2381 handle = new TypeHandle (t);
2382 type_hash.Add (t, handle);
2383 return handle;
2384 }
2385
2386 /// <summary>
2387 /// Returns the TypeHandle for TypeManager.object_type.
2388 /// </summary>
2389 public static IMemberContainer ObjectType {
2390 get {
2391 if (object_type != null)
2392 return object_type;
2393
2394 object_type = GetTypeHandle (TypeManager.object_type);
2395
2396 return object_type;
2397 }
2398 }
2399
2400 /// <summary>
2401 /// Returns the TypeHandle for TypeManager.array_type.
2402 /// </summary>
2403 public static IMemberContainer ArrayType {
2404 get {
2405 if (array_type != null)
2406 return array_type;
2407
2408 array_type = GetTypeHandle (TypeManager.array_type);
2409
2410 return array_type;
2411 }
2412 }
2413
2414 private static PtrHashtable type_hash = new PtrHashtable ();
2415
2416 private static TypeHandle object_type = null;
2417 private static TypeHandle array_type = null;
2418
2419 private Type type;
2420 private bool is_interface;
2421 private MemberCache member_cache;
2422
2423 private TypeHandle (Type type)
2424 {
2425 this.type = type;
2426 if (type.BaseType != null)
2427 BaseType = GetTypeHandle (type.BaseType);
2428 else if ((type != TypeManager.object_type) && (type != typeof (object)))
2429 is_interface = true;
2430 this.member_cache = new MemberCache (this);
2431 }
2432
2433 // IMemberContainer methods
2434
2435 public string Name {
2436 get {
2437 return type.FullName;
2438 }
2439 }
2440
2441 public Type Type {
2442 get {
2443 return type;
2444 }
2445 }
2446
2447 public IMemberContainer Parent {
2448 get {
2449 return BaseType;
2450 }
2451 }
2452
2453 public bool IsInterface {
2454 get {
2455 return is_interface;
2456 }
2457 }
2458
2459 public MemberList GetMembers (MemberTypes mt, BindingFlags bf)
2460 {
2461 if (mt == MemberTypes.Event)
2462 return new MemberList (type.GetEvents (bf | BindingFlags.DeclaredOnly));
2463 else
2464 return new MemberList (type.FindMembers (mt, bf | BindingFlags.DeclaredOnly | BindingFlags.IgnoreCase,
2465 null, null));
2466 }
2467
2468 // IMemberFinder methods
2469
2470 public MemberList FindMembers (MemberTypes mt, BindingFlags bf, string name,
2471 MemberFilter filter, object criteria)
2472 {
2473 return member_cache.FindMembers (mt, bf, name, filter, criteria);
2474 }
2475
2476 public MemberCache MemberCache {
2477 get {
2478 return member_cache;
2479 }
2480 }
2481
2482 public override string ToString ()
2483 {
2484 if (BaseType != null)
2485 return "TypeHandle (" + id + "," + Name + " : " + BaseType + ")";
2486 else
2487 return "TypeHandle (" + id + "," + Name + ")";
2488 }
2489 }
2490
2491 }
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