2 // attribute.cs: Attributes handling
4 // Author: Ravi Pratap (ravi@ximian.com)
5 // Marek Safar (marek.safar@gmail.com)
7 // Dual licensed under the terms of the MIT X11 or GNU GPL
9 // Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
10 // Copyright 2003-2008 Novell, Inc.
11 // Copyright 2011-2013 Xamarin Inc
15 using System.Collections.Generic;
16 using System.Runtime.InteropServices;
17 using System.Runtime.CompilerServices;
18 using System.Security;
19 using System.Security.Permissions;
24 using SecurityType = System.Collections.Generic.List<IKVM.Reflection.Emit.CustomAttributeBuilder>;
25 using BadImageFormat = IKVM.Reflection.BadImageFormatException;
26 using IKVM.Reflection;
27 using IKVM.Reflection.Emit;
29 using SecurityType = System.Collections.Generic.Dictionary<System.Security.Permissions.SecurityAction, System.Security.PermissionSet>;
30 using BadImageFormat = System.BadImageFormatException;
31 using System.Reflection;
32 using System.Reflection.Emit;
35 namespace Mono.CSharp {
38 /// Base class for objects that can have Attributes applied to them.
40 public abstract class Attributable {
42 // Holds all attributes attached to this element
44 protected Attributes attributes;
46 public void AddAttributes (Attributes attrs, IMemberContext context)
51 if (attributes == null)
54 attributes.AddAttributes (attrs.Attrs);
56 attrs.AttachTo (this, context);
59 public Attributes OptAttributes {
69 /// Use member-specific procedure to apply attribute @a in @cb to the entity being built in @builder
71 public abstract void ApplyAttributeBuilder (Attribute a, MethodSpec ctor, byte[] cdata, PredefinedAttributes pa);
74 /// Returns one AttributeTarget for this element.
76 public abstract AttributeTargets AttributeTargets { get; }
78 public abstract bool IsClsComplianceRequired ();
81 /// Gets list of valid attribute targets for explicit target declaration.
82 /// The first array item is default target. Don't break this rule.
84 public abstract string[] ValidAttributeTargets { get; }
87 public class Attribute
89 public readonly string ExplicitTarget;
90 public AttributeTargets Target;
91 readonly ATypeNameExpression expression;
93 Arguments pos_args, named_args;
97 readonly bool nameEscaped;
98 readonly Location loc;
102 // An attribute can be attached to multiple targets (e.g. multiple fields)
104 Attributable[] targets;
107 // A member context for the attribute, it's much easier to hold it here
108 // than trying to pull it during resolve
110 IMemberContext context;
112 public static readonly AttributeUsageAttribute DefaultUsageAttribute = new AttributeUsageAttribute (AttributeTargets.All);
113 public static readonly object[] EmptyObject = new object [0];
115 List<KeyValuePair<MemberExpr, NamedArgument>> named_values;
117 public Attribute (string target, ATypeNameExpression expr, Arguments[] args, Location loc, bool nameEscaped)
119 this.expression = expr;
122 named_args = args[1];
125 ExplicitTarget = target;
126 this.nameEscaped = nameEscaped;
129 public Location Location {
135 public Arguments NamedArguments {
141 public Arguments PositionalArguments {
147 public bool ResolveError {
149 return resolve_error;
153 public ATypeNameExpression TypeExpression {
159 void AddModuleCharSet (ResolveContext rc)
161 const string dll_import_char_set = "CharSet";
164 // Only when not customized by user
166 if (HasField (dll_import_char_set))
169 if (!rc.Module.PredefinedTypes.CharSet.Define ()) {
173 if (NamedArguments == null)
174 named_args = new Arguments (1);
176 var value = Constant.CreateConstantFromValue (rc.Module.PredefinedTypes.CharSet.TypeSpec, rc.Module.DefaultCharSet, Location);
177 NamedArguments.Add (new NamedArgument (dll_import_char_set, loc, value));
180 public Attribute Clone ()
182 Attribute a = new Attribute (ExplicitTarget, expression, null, loc, nameEscaped);
183 a.pos_args = pos_args;
184 a.named_args = NamedArguments;
189 // When the same attribute is attached to multiple fiels
190 // we use @target field as a list of targets. The attribute
191 // has to be resolved only once but emitted for each target.
193 public void AttachTo (Attributable target, IMemberContext context)
195 if (this.targets == null) {
196 this.targets = new Attributable[] { target };
197 this.context = context;
201 // When re-attaching global attributes
202 if (context is NamespaceContainer) {
203 this.targets[0] = target;
204 this.context = context;
208 // Resize target array
209 Attributable[] new_array = new Attributable [this.targets.Length + 1];
210 targets.CopyTo (new_array, 0);
211 new_array [targets.Length] = target;
212 this.targets = new_array;
214 // No need to update context, different targets cannot have
215 // different contexts, it's enough to remove same attributes
216 // from secondary members.
218 target.OptAttributes = null;
221 public ResolveContext CreateResolveContext ()
223 return new ResolveContext (context, ResolveContext.Options.ConstantScope);
226 static void Error_InvalidNamedArgument (ResolveContext rc, NamedArgument name)
228 rc.Report.Error (617, name.Location, "`{0}' is not a valid named attribute argument. Named attribute arguments " +
229 "must be fields which are not readonly, static, const or read-write properties which are " +
230 "public and not static",
234 static void Error_InvalidNamedArgumentType (ResolveContext rc, NamedArgument name)
236 rc.Report.Error (655, name.Location,
237 "`{0}' is not a valid named attribute argument because it is not a valid attribute parameter type",
241 public static void Error_AttributeArgumentIsDynamic (IMemberContext context, Location loc)
243 context.Module.Compiler.Report.Error (1982, loc, "An attribute argument cannot be dynamic expression");
246 public void Error_MissingGuidAttribute ()
248 Report.Error (596, Location, "The Guid attribute must be specified with the ComImport attribute");
251 public void Error_MisusedExtensionAttribute ()
253 Report.Error (1112, Location, "Do not use `{0}' directly. Use parameter modifier `this' instead", GetSignatureForError ());
256 public void Error_MisusedDynamicAttribute ()
258 Report.Error (1970, loc, "Do not use `{0}' directly. Use `dynamic' keyword instead", GetSignatureForError ());
261 void Error_AttributeEmitError (string inner)
263 Report.Error (647, Location, "Error during emitting `{0}' attribute. The reason is `{1}'",
264 Type.GetSignatureForError (), inner);
267 public void Error_InvalidArgumentValue (TypeSpec attributeType)
269 Report.Error (591, Location, "Invalid value for argument to `{0}' attribute", attributeType.GetSignatureForError ());
272 public void Error_InvalidSecurityParent ()
274 Report.Error (7070, Location,
275 "Security attribute `{0}' is not valid on this declaration type. Security attributes are only valid on assembly, type and method declarations",
276 Type.GetSignatureForError ());
286 /// Tries to resolve the type of the attribute. Flags an error if it can't, and complain is true.
288 void ResolveAttributeType (bool comparisonOnly)
290 var resolve_printer = new SessionReportPrinter ();
291 SessionReportPrinter secondary_printer = null;
292 ReportPrinter prev_recorder = Report.SetPrinter (resolve_printer);
294 bool t1_is_attr = false;
295 bool t2_is_attr = false;
297 ATypeNameExpression expanded = null;
299 // TODO: Additional warnings such as CS0436 are swallowed because we don't
303 t1 = expression.ResolveAsType (context);
304 resolve_printer.EndSession ();
306 if (t1 != null && resolve_printer.ErrorsCount == 0)
307 t1_is_attr = t1.IsAttribute;
312 expanded = (ATypeNameExpression) expression.Clone (null);
313 expanded.Name += "Attribute";
315 secondary_printer = new SessionReportPrinter ();
316 Report.SetPrinter (secondary_printer);
317 t2 = expanded.ResolveAsType (context);
318 secondary_printer.EndSession ();
319 if (t2 != null && secondary_printer.ErrorsCount == 0)
320 t2_is_attr = t2.IsAttribute;
322 secondary_printer.EndSession ();
325 context.Module.Compiler.Report.SetPrinter (prev_recorder);
328 if (t1_is_attr && t2_is_attr && t1 != t2) {
329 if (!comparisonOnly) {
330 Report.Error (1614, Location, "`{0}' is ambiguous between `{1}' and `{2}'. Use either `@{0}' or `{0}Attribute'",
331 GetSignatureForError (), expression.GetSignatureForError (), expanded.GetSignatureForError ());
332 resolve_error = true;
351 resolve_error = true;
354 if (resolve_printer.IsEmpty) {
355 Report.SymbolRelatedToPreviousError (t1);
356 Report.Error (616, Location, "`{0}': is not an attribute class", t1.GetSignatureForError ());
358 resolve_printer.Merge (prev_recorder);
365 if (secondary_printer.IsEmpty) {
366 Report.SymbolRelatedToPreviousError (t2);
367 Report.Error (616, Location, "`{0}': is not an attribute class", t2.GetSignatureForError ());
369 secondary_printer.Merge (prev_recorder);
375 resolve_printer.Merge (prev_recorder);
378 public TypeSpec ResolveTypeForComparison ()
380 if (Type == null && !resolve_error)
381 ResolveAttributeType (true);
385 public string GetSignatureForError ()
388 return Type.GetSignatureForError ();
390 return expression.GetSignatureForError ();
393 public bool HasSecurityAttribute {
395 PredefinedAttribute pa = context.Module.PredefinedAttributes.Security;
396 return pa.IsDefined && TypeSpec.IsBaseClass (Type, pa.TypeSpec, false);
400 public bool IsValidSecurityAttribute ()
402 return HasSecurityAttribute && IsSecurityActionValid ();
405 static bool IsValidMethodImplOption (int value)
408 // Allow to use AggressiveInlining on any runtime/corlib
410 MethodImplOptions all = (MethodImplOptions) 256;
411 foreach (MethodImplOptions v in System.Enum.GetValues (typeof (MethodImplOptions))) {
415 return ((MethodImplOptions) value | all) == all;
418 public static bool IsValidArgumentType (TypeSpec t)
421 var ac = (ArrayContainer) t;
428 switch (t.BuiltinType) {
429 case BuiltinTypeSpec.Type.Int:
430 case BuiltinTypeSpec.Type.UInt:
431 case BuiltinTypeSpec.Type.Long:
432 case BuiltinTypeSpec.Type.ULong:
433 case BuiltinTypeSpec.Type.Float:
434 case BuiltinTypeSpec.Type.Double:
435 case BuiltinTypeSpec.Type.Char:
436 case BuiltinTypeSpec.Type.Short:
437 case BuiltinTypeSpec.Type.Bool:
438 case BuiltinTypeSpec.Type.SByte:
439 case BuiltinTypeSpec.Type.Byte:
440 case BuiltinTypeSpec.Type.UShort:
442 case BuiltinTypeSpec.Type.String:
443 case BuiltinTypeSpec.Type.Object:
444 case BuiltinTypeSpec.Type.Dynamic:
445 case BuiltinTypeSpec.Type.Type:
452 // TODO: Don't use this ambiguous value
454 get { return expression.Name; }
457 public Report Report {
458 get { return context.Module.Compiler.Report; }
461 public MethodSpec Resolve ()
466 resolve_error = true;
470 ResolveAttributeType (false);
475 if (Type.IsAbstract) {
476 Report.Error (653, Location, "Cannot apply attribute class `{0}' because it is abstract", GetSignatureForError ());
480 ObsoleteAttribute obsolete_attr = Type.GetAttributeObsolete ();
481 if (obsolete_attr != null) {
482 AttributeTester.Report_ObsoleteMessage (obsolete_attr, Type.GetSignatureForError (), Location, Report);
485 ResolveContext rc = null;
488 // Try if the attribute is simple and has been resolved before
489 if (pos_args != null || !context.Module.AttributeConstructorCache.TryGetValue (Type, out ctor)) {
490 rc = CreateResolveContext ();
491 ctor = ResolveConstructor (rc);
496 if (pos_args == null && ctor.Parameters.IsEmpty)
497 context.Module.AttributeConstructorCache.Add (Type, ctor);
501 // Add [module: DefaultCharSet] to all DllImport import attributes
503 var module = context.Module;
504 if ((Type == module.PredefinedAttributes.DllImport || Type == module.PredefinedAttributes.UnmanagedFunctionPointer) && module.HasDefaultCharSet) {
506 rc = CreateResolveContext ();
508 AddModuleCharSet (rc);
511 if (NamedArguments != null) {
513 rc = CreateResolveContext ();
515 if (!ResolveNamedArguments (rc))
519 resolve_error = false;
523 MethodSpec ResolveConstructor (ResolveContext ec)
525 if (pos_args != null) {
527 pos_args.Resolve (ec, out dynamic);
529 Error_AttributeArgumentIsDynamic (ec.MemberContext, loc);
534 return Expression.ConstructorLookup (ec, Type, ref pos_args, loc);
537 bool ResolveNamedArguments (ResolveContext ec)
539 int named_arg_count = NamedArguments.Count;
540 var seen_names = new List<string> (named_arg_count);
542 named_values = new List<KeyValuePair<MemberExpr, NamedArgument>> (named_arg_count);
544 foreach (NamedArgument a in NamedArguments) {
545 string name = a.Name;
546 if (seen_names.Contains (name)) {
547 ec.Report.Error (643, a.Location, "Duplicate named attribute `{0}' argument", name);
551 seen_names.Add (name);
555 Expression member = Expression.MemberLookup (ec, false, Type, name, 0, Expression.MemberLookupRestrictions.ExactArity, loc);
557 if (member == null) {
558 member = Expression.MemberLookup (ec, true, Type, name, 0, Expression.MemberLookupRestrictions.ExactArity, loc);
560 if (member != null) {
561 // TODO: ec.Report.SymbolRelatedToPreviousError (member);
562 Expression.ErrorIsInaccesible (ec, member.GetSignatureForError (), loc);
568 Expression.Error_TypeDoesNotContainDefinition (ec, Location, Type, name);
572 if (!(member is PropertyExpr || member is FieldExpr)) {
573 Error_InvalidNamedArgument (ec, a);
577 ObsoleteAttribute obsolete_attr;
579 if (member is PropertyExpr) {
580 var pi = ((PropertyExpr) member).PropertyInfo;
582 if (!pi.HasSet || !pi.HasGet || pi.IsStatic || !pi.Get.IsPublic || !pi.Set.IsPublic) {
583 ec.Report.SymbolRelatedToPreviousError (pi);
584 Error_InvalidNamedArgument (ec, a);
588 if (!IsValidArgumentType (member.Type)) {
589 ec.Report.SymbolRelatedToPreviousError (pi);
590 Error_InvalidNamedArgumentType (ec, a);
594 obsolete_attr = pi.GetAttributeObsolete ();
595 pi.MemberDefinition.SetIsAssigned ();
597 var fi = ((FieldExpr) member).Spec;
599 if (fi.IsReadOnly || fi.IsStatic || !fi.IsPublic) {
600 Error_InvalidNamedArgument (ec, a);
604 if (!IsValidArgumentType (member.Type)) {
605 ec.Report.SymbolRelatedToPreviousError (fi);
606 Error_InvalidNamedArgumentType (ec, a);
610 obsolete_attr = fi.GetAttributeObsolete ();
611 fi.MemberDefinition.SetIsAssigned ();
614 if (obsolete_attr != null && !context.IsObsolete)
615 AttributeTester.Report_ObsoleteMessage (obsolete_attr, member.GetSignatureForError (), member.Location, Report);
617 if (a.Type != member.Type) {
618 a.Expr = Convert.ImplicitConversionRequired (ec, a.Expr, member.Type, a.Expr.Location);
622 named_values.Add (new KeyValuePair<MemberExpr, NamedArgument> ((MemberExpr) member, a));
629 /// Get a string containing a list of valid targets for the attribute 'attr'
631 public string GetValidTargets ()
633 StringBuilder sb = new StringBuilder ();
634 AttributeTargets targets = Type.GetAttributeUsage (context.Module.PredefinedAttributes.AttributeUsage).ValidOn;
636 if ((targets & AttributeTargets.Assembly) != 0)
637 sb.Append ("assembly, ");
639 if ((targets & AttributeTargets.Module) != 0)
640 sb.Append ("module, ");
642 if ((targets & AttributeTargets.Class) != 0)
643 sb.Append ("class, ");
645 if ((targets & AttributeTargets.Struct) != 0)
646 sb.Append ("struct, ");
648 if ((targets & AttributeTargets.Enum) != 0)
649 sb.Append ("enum, ");
651 if ((targets & AttributeTargets.Constructor) != 0)
652 sb.Append ("constructor, ");
654 if ((targets & AttributeTargets.Method) != 0)
655 sb.Append ("method, ");
657 if ((targets & AttributeTargets.Property) != 0)
658 sb.Append ("property, indexer, ");
660 if ((targets & AttributeTargets.Field) != 0)
661 sb.Append ("field, ");
663 if ((targets & AttributeTargets.Event) != 0)
664 sb.Append ("event, ");
666 if ((targets & AttributeTargets.Interface) != 0)
667 sb.Append ("interface, ");
669 if ((targets & AttributeTargets.Parameter) != 0)
670 sb.Append ("parameter, ");
672 if ((targets & AttributeTargets.Delegate) != 0)
673 sb.Append ("delegate, ");
675 if ((targets & AttributeTargets.ReturnValue) != 0)
676 sb.Append ("return, ");
678 if ((targets & AttributeTargets.GenericParameter) != 0)
679 sb.Append ("type parameter, ");
681 return sb.Remove (sb.Length - 2, 2).ToString ();
684 public AttributeUsageAttribute GetAttributeUsageAttribute ()
687 // TODO: It is not neccessary to call whole Resolve (ApplyAttribute does it now) we need only ctor args.
688 // But because a lot of attribute class code must be rewritten will be better to wait...
692 return DefaultUsageAttribute;
694 AttributeUsageAttribute usage_attribute = new AttributeUsageAttribute ((AttributeTargets) ((Constant) pos_args[0].Expr).GetValue ());
696 var field = GetNamedValue ("AllowMultiple") as BoolConstant;
698 usage_attribute.AllowMultiple = field.Value;
700 field = GetNamedValue ("Inherited") as BoolConstant;
702 usage_attribute.Inherited = field.Value;
704 return usage_attribute;
708 /// Returns custom name of indexer
710 public string GetIndexerAttributeValue ()
713 // TODO: It is not neccessary to call whole Resolve (ApplyAttribute does it now) we need only ctor args.
714 // But because a lot of attribute class code must be rewritten will be better to wait...
717 if (resolve_error || pos_args.Count != 1 || !(pos_args[0].Expr is Constant))
720 return ((Constant) pos_args[0].Expr).GetValue () as string;
724 /// Returns condition of ConditionalAttribute
726 public string GetConditionalAttributeValue ()
729 // TODO: It is not neccessary to call whole Resolve (ApplyAttribute does it now) we need only ctor args.
730 // But because a lot of attribute class code must be rewritten will be better to wait...
736 return ((Constant) pos_args[0].Expr).GetValue () as string;
740 /// Creates the instance of ObsoleteAttribute from this attribute instance
742 public ObsoleteAttribute GetObsoleteAttribute ()
745 // corlib only case when obsolete is used before is resolved
746 var c = Type.MemberDefinition as Class;
747 if (c != null && !c.HasMembersDefined)
750 // TODO: It is not neccessary to call whole Resolve (ApplyAttribute does it now) we need only ctor args.
751 // But because a lot of attribute class code must be rewritten will be better to wait...
758 if (pos_args == null)
759 return new ObsoleteAttribute ();
761 string msg = ((Constant) pos_args[0].Expr).GetValue () as string;
762 if (pos_args.Count == 1)
763 return new ObsoleteAttribute (msg);
765 return new ObsoleteAttribute (msg, ((BoolConstant) pos_args[1].Expr).Value);
769 /// Returns value of CLSCompliantAttribute contructor parameter but because the method can be called
770 /// before ApplyAttribute. We need to resolve the arguments.
771 /// This situation occurs when class deps is differs from Emit order.
773 public bool GetClsCompliantAttributeValue ()
776 // TODO: It is not neccessary to call whole Resolve (ApplyAttribute does it now) we need only ctor args.
777 // But because a lot of attribute class code must be rewritten will be better to wait...
783 return ((BoolConstant) pos_args[0].Expr).Value;
786 public TypeSpec GetCoClassAttributeValue ()
794 return GetArgumentType ();
797 public bool CheckTarget ()
799 string[] valid_targets = Owner.ValidAttributeTargets;
800 if (ExplicitTarget == null || ExplicitTarget == valid_targets [0]) {
801 Target = Owner.AttributeTargets;
805 // TODO: we can skip the first item
806 if (Array.Exists (valid_targets, i => i == ExplicitTarget)) {
807 switch (ExplicitTarget) {
808 case "return": Target = AttributeTargets.ReturnValue; return true;
809 case "param": Target = AttributeTargets.Parameter; return true;
810 case "field": Target = AttributeTargets.Field; return true;
811 case "method": Target = AttributeTargets.Method; return true;
812 case "property": Target = AttributeTargets.Property; return true;
813 case "module": Target = AttributeTargets.Module; return true;
815 throw new InternalErrorException ("Unknown explicit target: " + ExplicitTarget);
818 StringBuilder sb = new StringBuilder ();
819 foreach (string s in valid_targets) {
823 sb.Remove (sb.Length - 2, 2);
824 Report.Warning (657, 1, Location,
825 "`{0}' is not a valid attribute location for this declaration. Valid attribute locations for this declaration are `{1}'. All attributes in this section will be ignored",
826 ExplicitTarget, sb.ToString ());
831 /// Tests permitted SecurityAction for assembly or other types
833 bool IsSecurityActionValid ()
836 var action = GetSecurityActionValue (ref c);
837 bool for_assembly = Target == AttributeTargets.Assembly || Target == AttributeTargets.Module;
840 #pragma warning disable 618
841 case SecurityAction.Demand:
842 case SecurityAction.Assert:
843 case SecurityAction.Deny:
844 case SecurityAction.PermitOnly:
845 case SecurityAction.LinkDemand:
846 case SecurityAction.InheritanceDemand:
851 case SecurityAction.RequestMinimum:
852 case SecurityAction.RequestOptional:
853 case SecurityAction.RequestRefuse:
857 #pragma warning restore 618
859 Report.Error (7048, loc, "First argument of a security attribute `{0}' must be a valid SecurityAction",
860 Type.GetSignatureForError ());
864 Report.Error (7049, c.Location, "Security attribute `{0}' has an invalid SecurityAction value `{1}'",
865 Type.GetSignatureForError (), c.GetValueAsLiteral());
870 case AttributeTargets.Assembly:
871 Report.Error (7050, c.Location, "SecurityAction value `{0}' is invalid for security attributes applied to an assembly",
872 c.GetSignatureForError ());
875 Report.Error (7051, c.Location, "SecurityAction value `{0}' is invalid for security attributes applied to a type or a method",
876 c.GetSignatureForError ());
883 SecurityAction? GetSecurityActionValue (ref Constant value)
885 if (pos_args == null) {
886 var predefined = context.Module.PredefinedAttributes;
889 // BCL defines System.Security.Permissions.HostProtectionAttribute with parameterless
890 // contructor which should not be valid but it's already part of the framework
892 if (Type == predefined.HostProtection.TypeSpec) {
893 value = new IntConstant (context.Module.Compiler.BuiltinTypes, (int)SecurityAction.LinkDemand, loc);
894 return SecurityAction.LinkDemand;
900 value = (Constant) pos_args [0].Expr;
901 return (SecurityAction) value.GetValue ();
905 /// Creates instance of SecurityAttribute class and add result of CreatePermission method to permission table.
907 /// <returns></returns>
908 public void ExtractSecurityPermissionSet (MethodSpec ctor, ref SecurityType permissions)
912 if (pos_args != null) {
913 values = new object[pos_args.Count];
914 for (int i = 0; i < values.Length; ++i)
915 values[i] = ((Constant) pos_args[i].Expr).GetValue ();
921 object[] prop_values;
922 if (named_values == null) {
926 prop = new PropertyInfo[named_values.Count];
927 prop_values = new object [named_values.Count];
928 for (int i = 0; i < prop.Length; ++i) {
929 prop [i] = ((PropertyExpr) named_values [i].Key).PropertyInfo.MetaInfo;
930 prop_values [i] = ((Constant) named_values [i].Value.Expr).GetValue ();
934 if (permissions == null)
935 permissions = new SecurityType ();
937 var cab = new CustomAttributeBuilder ((ConstructorInfo) ctor.GetMetaInfo (), values, prop, prop_values);
938 permissions.Add (cab);
940 throw new NotSupportedException ();
944 public Constant GetNamedValue (string name)
946 if (named_values == null)
949 for (int i = 0; i < named_values.Count; ++i) {
950 if (named_values [i].Value.Name == name)
951 return named_values [i].Value.Expr as Constant;
957 public CharSet GetCharSetValue ()
959 return (CharSet) System.Enum.Parse (typeof (CharSet), ((Constant) pos_args[0].Expr).GetValue ().ToString ());
962 public bool HasField (string fieldName)
964 if (named_values == null)
967 foreach (var na in named_values) {
968 if (na.Value.Name == fieldName)
976 // Returns true for MethodImplAttribute with MethodImplOptions.InternalCall value
978 public bool IsInternalCall ()
980 return (GetMethodImplOptions () & MethodImplOptions.InternalCall) != 0;
983 public MethodImplOptions GetMethodImplOptions ()
985 MethodImplOptions options = 0;
986 if (pos_args.Count == 1) {
987 options = (MethodImplOptions) System.Enum.Parse (typeof (MethodImplOptions), ((Constant) pos_args[0].Expr).GetValue ().ToString ());
988 } else if (HasField ("Value")) {
989 var named = GetNamedValue ("Value");
990 options = (MethodImplOptions) System.Enum.Parse (typeof (MethodImplOptions), named.GetValue ().ToString ());
997 // Returns true for StructLayoutAttribute with LayoutKind.Explicit value
999 public bool IsExplicitLayoutKind ()
1001 if (pos_args == null || pos_args.Count != 1)
1004 var value = (LayoutKind) System.Enum.Parse (typeof (LayoutKind), ((Constant) pos_args[0].Expr).GetValue ().ToString ());
1005 return value == LayoutKind.Explicit;
1008 public Expression GetParameterDefaultValue ()
1010 if (pos_args == null)
1013 return pos_args[0].Expr;
1016 public override bool Equals (object obj)
1018 Attribute a = obj as Attribute;
1022 return Type == a.Type && Target == a.Target;
1025 public override int GetHashCode ()
1027 return Type.GetHashCode () ^ Target.GetHashCode ();
1031 /// Emit attribute for Attributable symbol
1033 public void Emit (Dictionary<Attribute, List<Attribute>> allEmitted)
1035 var ctor = Resolve ();
1039 var predefined = context.Module.PredefinedAttributes;
1041 AttributeUsageAttribute usage_attr = Type.GetAttributeUsage (predefined.AttributeUsage);
1042 if ((usage_attr.ValidOn & Target) == 0) {
1043 Report.Error (592, Location, "The attribute `{0}' is not valid on this declaration type. " +
1044 "It is valid on `{1}' declarations only",
1045 GetSignatureForError (), GetValidTargets ());
1050 if (pos_args == null && named_values == null) {
1051 cdata = AttributeEncoder.Empty;
1053 AttributeEncoder encoder = new AttributeEncoder ();
1055 if (pos_args != null) {
1056 var param_types = ctor.Parameters.Types;
1057 for (int j = 0; j < pos_args.Count; ++j) {
1058 var pt = param_types[j];
1059 var arg_expr = pos_args[j].Expr;
1061 if ((Type == predefined.IndexerName || Type == predefined.Conditional) && arg_expr is Constant) {
1062 string v = ((Constant) arg_expr).GetValue () as string;
1063 if (!Tokenizer.IsValidIdentifier (v) || (Type == predefined.IndexerName && Tokenizer.IsKeyword (v))) {
1064 context.Module.Compiler.Report.Error (633, arg_expr.Location,
1065 "The argument to the `{0}' attribute must be a valid identifier", GetSignatureForError ());
1068 } else if (Type == predefined.Guid) {
1069 string v = ((StringConstant) arg_expr).Value;
1073 Error_InvalidArgumentValue (Type);
1076 } else if (Type == predefined.AttributeUsage) {
1077 int v = ((IntConstant) ((EnumConstant) arg_expr).Child).Value;
1079 Error_InvalidArgumentValue (Type);
1080 } else if (Type == predefined.MarshalAs) {
1081 if (pos_args.Count == 1) {
1082 var u_type = (UnmanagedType) System.Enum.Parse (typeof (UnmanagedType), ((Constant) pos_args[0].Expr).GetValue ().ToString ());
1083 if (u_type == UnmanagedType.ByValArray && !(Owner is FieldBase)) {
1084 Report.Error (7055, pos_args [0].Expr.Location, "Unmanaged type `ByValArray' is only valid for fields");
1087 } else if (Type == predefined.DllImport) {
1088 if (pos_args.Count == 1 && pos_args[0].Expr is Constant) {
1089 var value = ((Constant) pos_args[0].Expr).GetValue () as string;
1090 if (string.IsNullOrEmpty (value))
1091 Error_InvalidArgumentValue (Type);
1093 } else if (Type == predefined.MethodImpl) {
1094 if (pos_args.Count == 1) {
1095 var value = (int) ((Constant) arg_expr).GetValueAsLong ();
1097 if (!IsValidMethodImplOption (value)) {
1098 Error_InvalidArgumentValue (Type);
1104 arg_expr.EncodeAttributeValue (context, encoder, pt, pt);
1108 if (named_values != null) {
1109 encoder.Encode ((ushort) named_values.Count);
1110 foreach (var na in named_values) {
1111 if (na.Key is FieldExpr)
1112 encoder.Encode ((byte) 0x53);
1114 encoder.Encode ((byte) 0x54);
1116 encoder.Encode (na.Key.Type);
1117 encoder.Encode (na.Value.Name);
1118 na.Value.Expr.EncodeAttributeValue (context, encoder, na.Key.Type, na.Key.Type);
1121 encoder.EncodeEmptyNamedArguments ();
1124 cdata = encoder.ToArray ();
1127 if (!ctor.DeclaringType.IsConditionallyExcluded (context)) {
1129 foreach (Attributable target in targets)
1130 target.ApplyAttributeBuilder (this, ctor, cdata, predefined);
1131 } catch (Exception e) {
1132 if (e is BadImageFormat && Report.Errors > 0)
1135 Error_AttributeEmitError (e.Message);
1140 if (!usage_attr.AllowMultiple && allEmitted != null) {
1141 if (allEmitted.ContainsKey (this)) {
1142 var a = allEmitted [this];
1144 a = new List<Attribute> (2);
1145 allEmitted [this] = a;
1149 allEmitted.Add (this, null);
1153 if (!context.Module.Compiler.Settings.VerifyClsCompliance)
1156 // Here we are testing attribute arguments for array usage (error 3016)
1157 if (Owner.IsClsComplianceRequired ()) {
1158 if (pos_args != null)
1159 pos_args.CheckArrayAsAttribute (context.Module.Compiler);
1161 if (NamedArguments == null)
1164 NamedArguments.CheckArrayAsAttribute (context.Module.Compiler);
1168 private Expression GetValue ()
1170 if (pos_args == null || pos_args.Count < 1)
1173 return pos_args[0].Expr;
1176 public string GetString ()
1178 Expression e = GetValue ();
1179 if (e is StringConstant)
1180 return ((StringConstant)e).Value;
1184 public bool GetBoolean ()
1186 Expression e = GetValue ();
1187 if (e is BoolConstant)
1188 return ((BoolConstant)e).Value;
1192 public TypeSpec GetArgumentType ()
1194 TypeOf e = GetValue () as TypeOf;
1197 return e.TypeArgument;
1201 public class Attributes
1203 public readonly List<Attribute> Attrs;
1205 public Attributes (Attribute a)
1207 Attrs = new List<Attribute> ();
1211 public Attributes (List<Attribute> attrs)
1213 Attrs = attrs ?? new List<Attribute> ();
1216 public void AddAttribute (Attribute attr)
1221 public void AddAttributes (List<Attribute> attrs)
1223 Attrs.AddRange (attrs);
1226 public void AttachTo (Attributable attributable, IMemberContext context)
1228 foreach (Attribute a in Attrs)
1229 a.AttachTo (attributable, context);
1232 public Attributes Clone ()
1234 var al = new List<Attribute> (Attrs.Count);
1235 foreach (Attribute a in Attrs)
1236 al.Add (a.Clone ());
1238 return new Attributes (al);
1242 /// Checks whether attribute target is valid for the current element
1244 public bool CheckTargets ()
1246 for (int i = 0; i < Attrs.Count; ++i) {
1247 if (!Attrs [i].CheckTarget ())
1248 Attrs.RemoveAt (i--);
1254 public void ConvertGlobalAttributes (TypeContainer member, NamespaceContainer currentNamespace, bool isGlobal)
1256 var member_explicit_targets = member.ValidAttributeTargets;
1257 for (int i = 0; i < Attrs.Count; ++i) {
1258 var attr = Attrs[0];
1259 if (attr.ExplicitTarget == null)
1263 for (ii = 0; ii < member_explicit_targets.Length; ++ii) {
1264 if (attr.ExplicitTarget == member_explicit_targets[ii]) {
1270 if (ii < 0 || !isGlobal)
1273 member.Module.AddAttribute (attr, currentNamespace);
1279 public bool HasResolveError()
1281 foreach (var a in Attrs) {
1289 public Attribute Search (PredefinedAttribute t)
1291 return Search (null, t);
1294 public Attribute Search (string explicitTarget, PredefinedAttribute t)
1296 foreach (Attribute a in Attrs) {
1297 if (explicitTarget != null && a.ExplicitTarget != explicitTarget)
1300 if (a.ResolveTypeForComparison () == t)
1307 /// Returns all attributes of type 't'. Use it when attribute is AllowMultiple = true
1309 public Attribute[] SearchMulti (PredefinedAttribute t)
1311 List<Attribute> ar = null;
1313 foreach (Attribute a in Attrs) {
1314 if (a.ResolveTypeForComparison () == t) {
1316 ar = new List<Attribute> (Attrs.Count);
1321 return ar == null ? null : ar.ToArray ();
1328 Dictionary<Attribute, List<Attribute>> ld = Attrs.Count > 1 ? new Dictionary<Attribute, List<Attribute>> () : null;
1330 foreach (Attribute a in Attrs)
1333 if (ld == null || ld.Count == 0)
1336 foreach (var d in ld) {
1337 if (d.Value == null)
1340 Attribute a = d.Key;
1342 foreach (Attribute collision in d.Value)
1343 a.Report.SymbolRelatedToPreviousError (collision.Location, "");
1345 a.Report.Error (579, a.Location, "The attribute `{0}' cannot be applied multiple times",
1346 a.GetSignatureForError ());
1350 public bool Contains (PredefinedAttribute t)
1352 return Search (t) != null;
1356 public sealed class AttributeEncoder
1359 public enum EncodedTypeProperties
1363 TypeParameter = 1 << 1
1366 public static readonly byte[] Empty;
1370 const ushort Version = 1;
1372 static AttributeEncoder ()
1374 Empty = new byte[4];
1375 Empty[0] = (byte) Version;
1378 public AttributeEncoder ()
1380 buffer = new byte[32];
1384 public void Encode (bool value)
1386 Encode (value ? (byte) 1 : (byte) 0);
1389 public void Encode (byte value)
1391 if (pos == buffer.Length)
1394 buffer [pos++] = value;
1397 public void Encode (sbyte value)
1399 Encode ((byte) value);
1402 public void Encode (short value)
1404 if (pos + 2 > buffer.Length)
1407 buffer[pos++] = (byte) value;
1408 buffer[pos++] = (byte) (value >> 8);
1411 public void Encode (ushort value)
1413 Encode ((short) value);
1416 public void Encode (int value)
1418 if (pos + 4 > buffer.Length)
1421 buffer[pos++] = (byte) value;
1422 buffer[pos++] = (byte) (value >> 8);
1423 buffer[pos++] = (byte) (value >> 16);
1424 buffer[pos++] = (byte) (value >> 24);
1427 public void Encode (uint value)
1429 Encode ((int) value);
1432 public void Encode (long value)
1434 if (pos + 8 > buffer.Length)
1437 buffer[pos++] = (byte) value;
1438 buffer[pos++] = (byte) (value >> 8);
1439 buffer[pos++] = (byte) (value >> 16);
1440 buffer[pos++] = (byte) (value >> 24);
1441 buffer[pos++] = (byte) (value >> 32);
1442 buffer[pos++] = (byte) (value >> 40);
1443 buffer[pos++] = (byte) (value >> 48);
1444 buffer[pos++] = (byte) (value >> 56);
1447 public void Encode (ulong value)
1449 Encode ((long) value);
1452 public void Encode (float value)
1454 Encode (SingleConverter.SingleToInt32Bits (value));
1457 public void Encode (double value)
1459 Encode (BitConverter.DoubleToInt64Bits (value));
1462 public void Encode (string value)
1464 if (value == null) {
1465 Encode ((byte) 0xFF);
1469 var buf = Encoding.UTF8.GetBytes(value);
1470 WriteCompressedValue (buf.Length);
1472 if (pos + buf.Length > buffer.Length)
1475 Buffer.BlockCopy (buf, 0, buffer, pos, buf.Length);
1479 public EncodedTypeProperties Encode (TypeSpec type)
1481 switch (type.BuiltinType) {
1482 case BuiltinTypeSpec.Type.Bool:
1483 Encode ((byte) 0x02);
1485 case BuiltinTypeSpec.Type.Char:
1486 Encode ((byte) 0x03);
1488 case BuiltinTypeSpec.Type.SByte:
1489 Encode ((byte) 0x04);
1491 case BuiltinTypeSpec.Type.Byte:
1492 Encode ((byte) 0x05);
1494 case BuiltinTypeSpec.Type.Short:
1495 Encode ((byte) 0x06);
1497 case BuiltinTypeSpec.Type.UShort:
1498 Encode ((byte) 0x07);
1500 case BuiltinTypeSpec.Type.Int:
1501 Encode ((byte) 0x08);
1503 case BuiltinTypeSpec.Type.UInt:
1504 Encode ((byte) 0x09);
1506 case BuiltinTypeSpec.Type.Long:
1507 Encode ((byte) 0x0A);
1509 case BuiltinTypeSpec.Type.ULong:
1510 Encode ((byte) 0x0B);
1512 case BuiltinTypeSpec.Type.Float:
1513 Encode ((byte) 0x0C);
1515 case BuiltinTypeSpec.Type.Double:
1516 Encode ((byte) 0x0D);
1518 case BuiltinTypeSpec.Type.String:
1519 Encode ((byte) 0x0E);
1521 case BuiltinTypeSpec.Type.Type:
1522 Encode ((byte) 0x50);
1524 case BuiltinTypeSpec.Type.Object:
1525 Encode ((byte) 0x51);
1527 case BuiltinTypeSpec.Type.Dynamic:
1528 Encode ((byte) 0x51);
1529 return EncodedTypeProperties.DynamicType;
1532 Encode ((byte) 0x1D);
1533 return Encode (TypeManager.GetElementType (type));
1536 if (type.Kind == MemberKind.Enum) {
1537 Encode ((byte) 0x55);
1538 EncodeTypeName (type);
1544 return EncodedTypeProperties.None;
1547 public void EncodeTypeName (TypeSpec type)
1549 var old_type = type.GetMetaInfo ();
1550 Encode (type.MemberDefinition.IsImported ? old_type.AssemblyQualifiedName : old_type.FullName);
1553 public void EncodeTypeName (TypeContainer type)
1555 Encode (type.GetSignatureForMetadata ());
1560 // Encodes single property named argument per call
1562 public void EncodeNamedPropertyArgument (PropertySpec property, Constant value)
1564 Encode ((ushort) 1); // length
1565 Encode ((byte) 0x54); // property
1566 Encode (property.MemberType);
1567 Encode (property.Name);
1568 value.EncodeAttributeValue (null, this, property.MemberType, property.MemberType);
1572 // Encodes single field named argument per call
1574 public void EncodeNamedFieldArgument (FieldSpec field, Constant value)
1576 Encode ((ushort) 1); // length
1577 Encode ((byte) 0x53); // field
1578 Encode (field.MemberType);
1579 Encode (field.Name);
1580 value.EncodeAttributeValue (null, this, field.MemberType, field.MemberType);
1583 public void EncodeNamedArguments<T> (T[] members, Constant[] values) where T : MemberSpec, IInterfaceMemberSpec
1585 Encode ((ushort) members.Length);
1587 for (int i = 0; i < members.Length; ++i)
1589 var member = members[i];
1591 if (member.Kind == MemberKind.Field)
1592 Encode ((byte) 0x53);
1593 else if (member.Kind == MemberKind.Property)
1594 Encode ((byte) 0x54);
1596 throw new NotImplementedException (member.Kind.ToString ());
1598 Encode (member.MemberType);
1599 Encode (member.Name);
1600 values [i].EncodeAttributeValue (null, this, member.MemberType, member.MemberType);
1604 public void EncodeEmptyNamedArguments ()
1606 Encode ((ushort) 0);
1611 int size = System.Math.Max (pos * 4, pos + inc + 2);
1612 Array.Resize (ref buffer, size);
1615 void WriteCompressedValue (int value)
1618 Encode ((byte) value);
1622 if (value < 0x4000) {
1623 Encode ((byte) (0x80 | (value >> 8)));
1624 Encode ((byte) value);
1631 public byte[] ToArray ()
1633 byte[] buf = new byte[pos];
1634 Array.Copy (buffer, buf, pos);
1641 /// Helper class for attribute verification routine.
1643 static class AttributeTester
1646 /// Common method for Obsolete error/warning reporting.
1648 public static void Report_ObsoleteMessage (ObsoleteAttribute oa, string member, Location loc, Report Report)
1651 Report.Error (619, loc, "`{0}' is obsolete: `{1}'", member, oa.Message);
1655 if (oa.Message == null || oa.Message.Length == 0) {
1656 Report.Warning (612, 1, loc, "`{0}' is obsolete", member);
1659 Report.Warning (618, 2, loc, "`{0}' is obsolete: `{1}'", member, oa.Message);
1664 // Predefined attribute types
1666 public class PredefinedAttributes
1668 // Build-in attributes
1669 public readonly PredefinedAttribute ParamArray;
1670 public readonly PredefinedAttribute Out;
1672 // Optional attributes
1673 public readonly PredefinedAttribute Obsolete;
1674 public readonly PredefinedAttribute DllImport;
1675 public readonly PredefinedAttribute MethodImpl;
1676 public readonly PredefinedAttribute MarshalAs;
1677 public readonly PredefinedAttribute In;
1678 public readonly PredefinedAttribute IndexerName;
1679 public readonly PredefinedAttribute Conditional;
1680 public readonly PredefinedAttribute CLSCompliant;
1681 public readonly PredefinedAttribute Security;
1682 public readonly PredefinedAttribute Required;
1683 public readonly PredefinedAttribute Guid;
1684 public readonly PredefinedAttribute AssemblyCulture;
1685 public readonly PredefinedAttribute AssemblyVersion;
1686 public readonly PredefinedAttribute AssemblyAlgorithmId;
1687 public readonly PredefinedAttribute AssemblyFlags;
1688 public readonly PredefinedAttribute AssemblyFileVersion;
1689 public readonly PredefinedAttribute ComImport;
1690 public readonly PredefinedAttribute CoClass;
1691 public readonly PredefinedAttribute AttributeUsage;
1692 public readonly PredefinedAttribute DefaultParameterValue;
1693 public readonly PredefinedAttribute OptionalParameter;
1694 public readonly PredefinedAttribute UnverifiableCode;
1695 public readonly PredefinedAttribute DefaultCharset;
1696 public readonly PredefinedAttribute TypeForwarder;
1697 public readonly PredefinedAttribute FixedBuffer;
1698 public readonly PredefinedAttribute CompilerGenerated;
1699 public readonly PredefinedAttribute InternalsVisibleTo;
1700 public readonly PredefinedAttribute RuntimeCompatibility;
1701 public readonly PredefinedAttribute DebuggerHidden;
1702 public readonly PredefinedAttribute UnsafeValueType;
1703 public readonly PredefinedAttribute UnmanagedFunctionPointer;
1704 public readonly PredefinedDebuggerBrowsableAttribute DebuggerBrowsable;
1705 public readonly PredefinedAttribute DebuggerStepThrough;
1706 public readonly PredefinedDebuggableAttribute Debuggable;
1707 public readonly PredefinedAttribute HostProtection;
1710 public readonly PredefinedAttribute Extension;
1713 public readonly PredefinedDynamicAttribute Dynamic;
1716 public readonly PredefinedStateMachineAttribute AsyncStateMachine;
1719 // Optional types which are used as types and for member lookup
1721 public readonly PredefinedAttribute DefaultMember;
1722 public readonly PredefinedDecimalAttribute DecimalConstant;
1723 public readonly PredefinedAttribute StructLayout;
1724 public readonly PredefinedAttribute FieldOffset;
1725 public readonly PredefinedAttribute AssemblyProduct;
1726 public readonly PredefinedAttribute AssemblyCompany;
1727 public readonly PredefinedAttribute AssemblyCopyright;
1728 public readonly PredefinedAttribute AssemblyTrademark;
1729 public readonly PredefinedAttribute CallerMemberNameAttribute;
1730 public readonly PredefinedAttribute CallerLineNumberAttribute;
1731 public readonly PredefinedAttribute CallerFilePathAttribute;
1733 public PredefinedAttributes (ModuleContainer module)
1735 ParamArray = new PredefinedAttribute (module, "System", "ParamArrayAttribute");
1736 Out = new PredefinedAttribute (module, "System.Runtime.InteropServices", "OutAttribute");
1737 ParamArray.Resolve ();
1740 Obsolete = new PredefinedAttribute (module, "System", "ObsoleteAttribute");
1741 DllImport = new PredefinedAttribute (module, "System.Runtime.InteropServices", "DllImportAttribute");
1742 MethodImpl = new PredefinedAttribute (module, "System.Runtime.CompilerServices", "MethodImplAttribute");
1743 MarshalAs = new PredefinedAttribute (module, "System.Runtime.InteropServices", "MarshalAsAttribute");
1744 In = new PredefinedAttribute (module, "System.Runtime.InteropServices", "InAttribute");
1745 IndexerName = new PredefinedAttribute (module, "System.Runtime.CompilerServices", "IndexerNameAttribute");
1746 Conditional = new PredefinedAttribute (module, "System.Diagnostics", "ConditionalAttribute");
1747 CLSCompliant = new PredefinedAttribute (module, "System", "CLSCompliantAttribute");
1748 Security = new PredefinedAttribute (module, "System.Security.Permissions", "SecurityAttribute");
1749 Required = new PredefinedAttribute (module, "System.Runtime.CompilerServices", "RequiredAttributeAttribute");
1750 Guid = new PredefinedAttribute (module, "System.Runtime.InteropServices", "GuidAttribute");
1751 AssemblyCulture = new PredefinedAttribute (module, "System.Reflection", "AssemblyCultureAttribute");
1752 AssemblyVersion = new PredefinedAttribute (module, "System.Reflection", "AssemblyVersionAttribute");
1753 AssemblyAlgorithmId = new PredefinedAttribute (module, "System.Reflection", "AssemblyAlgorithmIdAttribute");
1754 AssemblyFlags = new PredefinedAttribute (module, "System.Reflection", "AssemblyFlagsAttribute");
1755 AssemblyFileVersion = new PredefinedAttribute (module, "System.Reflection", "AssemblyFileVersionAttribute");
1756 ComImport = new PredefinedAttribute (module, "System.Runtime.InteropServices", "ComImportAttribute");
1757 CoClass = new PredefinedAttribute (module, "System.Runtime.InteropServices", "CoClassAttribute");
1758 AttributeUsage = new PredefinedAttribute (module, "System", "AttributeUsageAttribute");
1759 DefaultParameterValue = new PredefinedAttribute (module, "System.Runtime.InteropServices", "DefaultParameterValueAttribute");
1760 OptionalParameter = new PredefinedAttribute (module, "System.Runtime.InteropServices", "OptionalAttribute");
1761 UnverifiableCode = new PredefinedAttribute (module, "System.Security", "UnverifiableCodeAttribute");
1762 HostProtection = new PredefinedAttribute (module, "System.Security.Permissions", "HostProtectionAttribute");
1764 DefaultCharset = new PredefinedAttribute (module, "System.Runtime.InteropServices", "DefaultCharSetAttribute");
1765 TypeForwarder = new PredefinedAttribute (module, "System.Runtime.CompilerServices", "TypeForwardedToAttribute");
1766 FixedBuffer = new PredefinedAttribute (module, "System.Runtime.CompilerServices", "FixedBufferAttribute");
1767 CompilerGenerated = new PredefinedAttribute (module, "System.Runtime.CompilerServices", "CompilerGeneratedAttribute");
1768 InternalsVisibleTo = new PredefinedAttribute (module, "System.Runtime.CompilerServices", "InternalsVisibleToAttribute");
1769 RuntimeCompatibility = new PredefinedAttribute (module, "System.Runtime.CompilerServices", "RuntimeCompatibilityAttribute");
1770 DebuggerHidden = new PredefinedAttribute (module, "System.Diagnostics", "DebuggerHiddenAttribute");
1771 UnsafeValueType = new PredefinedAttribute (module, "System.Runtime.CompilerServices", "UnsafeValueTypeAttribute");
1772 UnmanagedFunctionPointer = new PredefinedAttribute (module, "System.Runtime.InteropServices", "UnmanagedFunctionPointerAttribute");
1773 DebuggerBrowsable = new PredefinedDebuggerBrowsableAttribute (module, "System.Diagnostics", "DebuggerBrowsableAttribute");
1774 DebuggerStepThrough = new PredefinedAttribute (module, "System.Diagnostics", "DebuggerStepThroughAttribute");
1775 Debuggable = new PredefinedDebuggableAttribute (module, "System.Diagnostics", "DebuggableAttribute");
1777 Extension = new PredefinedAttribute (module, "System.Runtime.CompilerServices", "ExtensionAttribute");
1779 Dynamic = new PredefinedDynamicAttribute (module, "System.Runtime.CompilerServices", "DynamicAttribute");
1781 DefaultMember = new PredefinedAttribute (module, "System.Reflection", "DefaultMemberAttribute");
1782 DecimalConstant = new PredefinedDecimalAttribute (module, "System.Runtime.CompilerServices", "DecimalConstantAttribute");
1783 StructLayout = new PredefinedAttribute (module, "System.Runtime.InteropServices", "StructLayoutAttribute");
1784 FieldOffset = new PredefinedAttribute (module, "System.Runtime.InteropServices", "FieldOffsetAttribute");
1785 AssemblyProduct = new PredefinedAttribute (module, "System.Reflection", "AssemblyProductAttribute");
1786 AssemblyCompany = new PredefinedAttribute (module, "System.Reflection", "AssemblyCompanyAttribute");
1787 AssemblyCopyright = new PredefinedAttribute (module, "System.Reflection", "AssemblyCopyrightAttribute");
1788 AssemblyTrademark = new PredefinedAttribute (module, "System.Reflection", "AssemblyTrademarkAttribute");
1790 AsyncStateMachine = new PredefinedStateMachineAttribute (module, "System.Runtime.CompilerServices", "AsyncStateMachineAttribute");
1792 CallerMemberNameAttribute = new PredefinedAttribute (module, "System.Runtime.CompilerServices", "CallerMemberNameAttribute");
1793 CallerLineNumberAttribute = new PredefinedAttribute (module, "System.Runtime.CompilerServices", "CallerLineNumberAttribute");
1794 CallerFilePathAttribute = new PredefinedAttribute (module, "System.Runtime.CompilerServices", "CallerFilePathAttribute");
1796 // TODO: Should define only attributes which are used for comparison
1797 const System.Reflection.BindingFlags all_fields = System.Reflection.BindingFlags.Public |
1798 System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.DeclaredOnly;
1800 foreach (var fi in GetType ().GetFields (all_fields)) {
1801 ((PredefinedAttribute) fi.GetValue (this)).Define ();
1806 public class PredefinedAttribute : PredefinedType
1808 protected MethodSpec ctor;
1810 public PredefinedAttribute (ModuleContainer module, string ns, string name)
1811 : base (module, MemberKind.Class, ns, name)
1817 public MethodSpec Constructor {
1825 public static bool operator == (TypeSpec type, PredefinedAttribute pa)
1827 return type == pa.type && pa.type != null;
1830 public static bool operator != (TypeSpec type, PredefinedAttribute pa)
1832 return type != pa.type;
1835 public override int GetHashCode ()
1837 return base.GetHashCode ();
1840 public override bool Equals (object obj)
1842 throw new NotSupportedException ();
1845 public void EmitAttribute (ConstructorBuilder builder)
1847 if (ResolveBuilder ())
1848 builder.SetCustomAttribute (GetCtorMetaInfo (), AttributeEncoder.Empty);
1851 public void EmitAttribute (MethodBuilder builder)
1853 if (ResolveBuilder ())
1854 builder.SetCustomAttribute (GetCtorMetaInfo (), AttributeEncoder.Empty);
1857 public void EmitAttribute (PropertyBuilder builder)
1859 if (ResolveBuilder ())
1860 builder.SetCustomAttribute (GetCtorMetaInfo (), AttributeEncoder.Empty);
1863 public void EmitAttribute (FieldBuilder builder)
1865 if (ResolveBuilder ())
1866 builder.SetCustomAttribute (GetCtorMetaInfo (), AttributeEncoder.Empty);
1869 public void EmitAttribute (TypeBuilder builder)
1871 if (ResolveBuilder ())
1872 builder.SetCustomAttribute (GetCtorMetaInfo (), AttributeEncoder.Empty);
1875 public void EmitAttribute (AssemblyBuilder builder)
1877 if (ResolveBuilder ())
1878 builder.SetCustomAttribute (GetCtorMetaInfo (), AttributeEncoder.Empty);
1881 public void EmitAttribute (ModuleBuilder builder)
1883 if (ResolveBuilder ())
1884 builder.SetCustomAttribute (GetCtorMetaInfo (), AttributeEncoder.Empty);
1887 public void EmitAttribute (ParameterBuilder builder)
1889 if (ResolveBuilder ())
1890 builder.SetCustomAttribute (GetCtorMetaInfo (), AttributeEncoder.Empty);
1893 ConstructorInfo GetCtorMetaInfo ()
1895 return (ConstructorInfo) ctor.GetMetaInfo ();
1898 public bool ResolveBuilder ()
1904 // Handle all parameter-less attributes as optional
1909 ctor = (MethodSpec) MemberCache.FindMember (type, MemberFilter.Constructor (ParametersCompiled.EmptyReadOnlyParameters), BindingRestriction.DeclaredOnly);
1910 return ctor != null;
1914 public class PredefinedDebuggerBrowsableAttribute : PredefinedAttribute
1916 public PredefinedDebuggerBrowsableAttribute (ModuleContainer module, string ns, string name)
1917 : base (module, ns, name)
1921 public void EmitAttribute (FieldBuilder builder, System.Diagnostics.DebuggerBrowsableState state)
1923 var ctor = module.PredefinedMembers.DebuggerBrowsableAttributeCtor.Get ();
1927 AttributeEncoder encoder = new AttributeEncoder ();
1928 encoder.Encode ((int) state);
1929 encoder.EncodeEmptyNamedArguments ();
1931 builder.SetCustomAttribute ((ConstructorInfo) ctor.GetMetaInfo (), encoder.ToArray ());
1935 public class PredefinedDebuggableAttribute : PredefinedAttribute
1937 public PredefinedDebuggableAttribute (ModuleContainer module, string ns, string name)
1938 : base (module, ns, name)
1942 public void EmitAttribute (AssemblyBuilder builder, System.Diagnostics.DebuggableAttribute.DebuggingModes modes)
1944 var atype = module.PredefinedAttributes.Debuggable;
1945 if (!atype.Define ())
1948 MethodSpec ctor = null;
1949 foreach (MethodSpec m in MemberCache.FindMembers (atype.TypeSpec, CSharp.Constructor.ConstructorName, true)) {
1950 if (m.Parameters.Count != 1)
1953 if (m.Parameters.Types[0].Kind == MemberKind.Enum) {
1961 AttributeEncoder encoder = new AttributeEncoder ();
1962 encoder.Encode ((int) modes);
1963 encoder.EncodeEmptyNamedArguments ();
1965 builder.SetCustomAttribute ((ConstructorInfo) ctor.GetMetaInfo (), encoder.ToArray ());
1969 public class PredefinedDecimalAttribute : PredefinedAttribute
1971 public PredefinedDecimalAttribute (ModuleContainer module, string ns, string name)
1972 : base (module, ns, name)
1976 public void EmitAttribute (ParameterBuilder builder, decimal value, Location loc)
1978 var ctor = module.PredefinedMembers.DecimalConstantAttributeCtor.Resolve (loc);
1982 int[] bits = decimal.GetBits (value);
1983 AttributeEncoder encoder = new AttributeEncoder ();
1984 encoder.Encode ((byte) (bits[3] >> 16));
1985 encoder.Encode ((byte) (bits[3] >> 31));
1986 encoder.Encode ((uint) bits[2]);
1987 encoder.Encode ((uint) bits[1]);
1988 encoder.Encode ((uint) bits[0]);
1989 encoder.EncodeEmptyNamedArguments ();
1991 builder.SetCustomAttribute ((ConstructorInfo) ctor.GetMetaInfo (), encoder.ToArray ());
1994 public void EmitAttribute (FieldBuilder builder, decimal value, Location loc)
1996 var ctor = module.PredefinedMembers.DecimalConstantAttributeCtor.Resolve (loc);
2000 int[] bits = decimal.GetBits (value);
2001 AttributeEncoder encoder = new AttributeEncoder ();
2002 encoder.Encode ((byte) (bits[3] >> 16));
2003 encoder.Encode ((byte) (bits[3] >> 31));
2004 encoder.Encode ((uint) bits[2]);
2005 encoder.Encode ((uint) bits[1]);
2006 encoder.Encode ((uint) bits[0]);
2007 encoder.EncodeEmptyNamedArguments ();
2009 builder.SetCustomAttribute ((ConstructorInfo) ctor.GetMetaInfo (), encoder.ToArray ());
2013 public class PredefinedStateMachineAttribute : PredefinedAttribute
2015 public PredefinedStateMachineAttribute (ModuleContainer module, string ns, string name)
2016 : base (module, ns, name)
2020 public void EmitAttribute (MethodBuilder builder, StateMachine type)
2022 var predefined_ctor = module.PredefinedMembers.AsyncStateMachineAttributeCtor;
2024 var ctor = predefined_ctor.Get ();
2029 AttributeEncoder encoder = new AttributeEncoder ();
2030 encoder.EncodeTypeName (type);
2031 encoder.EncodeEmptyNamedArguments ();
2033 builder.SetCustomAttribute ((ConstructorInfo) ctor.GetMetaInfo (), encoder.ToArray ());
2037 public class PredefinedDynamicAttribute : PredefinedAttribute
2041 public PredefinedDynamicAttribute (ModuleContainer module, string ns, string name)
2042 : base (module, ns, name)
2046 public void EmitAttribute (FieldBuilder builder, TypeSpec type, Location loc)
2048 if (ResolveTransformationCtor (loc)) {
2049 var cab = new CustomAttributeBuilder ((ConstructorInfo) tctor.GetMetaInfo (), new object[] { GetTransformationFlags (type) });
2050 builder.SetCustomAttribute (cab);
2054 public void EmitAttribute (ParameterBuilder builder, TypeSpec type, Location loc)
2056 if (ResolveTransformationCtor (loc)) {
2057 var cab = new CustomAttributeBuilder ((ConstructorInfo) tctor.GetMetaInfo (), new object[] { GetTransformationFlags (type) });
2058 builder.SetCustomAttribute (cab);
2062 public void EmitAttribute (PropertyBuilder builder, TypeSpec type, Location loc)
2064 if (ResolveTransformationCtor (loc)) {
2065 var cab = new CustomAttributeBuilder ((ConstructorInfo) tctor.GetMetaInfo (), new object[] { GetTransformationFlags (type) });
2066 builder.SetCustomAttribute (cab);
2070 public void EmitAttribute (TypeBuilder builder, TypeSpec type, Location loc)
2072 if (ResolveTransformationCtor (loc)) {
2073 var cab = new CustomAttributeBuilder ((ConstructorInfo) tctor.GetMetaInfo (), new object[] { GetTransformationFlags (type) });
2074 builder.SetCustomAttribute (cab);
2079 // When any element of the type is a dynamic type
2081 // This method builds a transformation array for dynamic types
2082 // used in places where DynamicAttribute cannot be applied to.
2083 // It uses bool flag when type is of dynamic type and each
2084 // section always starts with "false" for some reason.
2086 // LAMESPEC: This should be part of C# specification
2088 // Example: Func<dynamic, int, dynamic[]>
2089 // Transformation: { false, true, false, false, true }
2091 static bool[] GetTransformationFlags (TypeSpec t)
2094 var ac = t as ArrayContainer;
2096 element = GetTransformationFlags (ac.Element);
2097 if (element == null)
2098 return new bool[] { false, false };
2100 bool[] res = new bool[element.Length + 1];
2102 Array.Copy (element, 0, res, 1, element.Length);
2110 List<bool> transform = null;
2111 var targs = t.TypeArguments;
2112 for (int i = 0; i < targs.Length; ++i) {
2113 element = GetTransformationFlags (targs[i]);
2114 if (element != null) {
2115 if (transform == null) {
2116 transform = new List<bool> ();
2117 for (int ii = 0; ii <= i; ++ii)
2118 transform.Add (false);
2121 transform.AddRange (element);
2122 } else if (transform != null) {
2123 transform.Add (false);
2127 if (transform != null)
2128 return transform.ToArray ();
2131 if (t.BuiltinType == BuiltinTypeSpec.Type.Dynamic)
2132 return new bool[] { true };
2137 bool ResolveTransformationCtor (Location loc)
2142 tctor = module.PredefinedMembers.DynamicAttributeCtor.Resolve (loc);
2143 return tctor != null;