-//\r
-// attribute.cs: Attribute Handler\r
-//\r
-// Author: Ravi Pratap (ravi@ximian.com)\r
-//\r
-// Licensed under the terms of the GNU GPL\r
-//\r
-// (C) 2001 Ximian, Inc (http://www.ximian.com)\r
-//\r
-//\r
-\r
-using System;\r
-using System.Collections;\r
-using System.Reflection;\r
-using System.Reflection.Emit;\r
-using System.Runtime.InteropServices;\r
-using System.Runtime.CompilerServices;\r
-using System.Text;\r
-\r
-namespace Mono.CSharp {\r
-\r
- public class Attribute {\r
- public readonly string Name;\r
- public readonly ArrayList Arguments;\r
-\r
- Location Location;\r
-\r
- public Type Type;\r
- \r
- //\r
- // The following are only meaningful when the attribute\r
- // being emitted is one of the builtin ones\r
- //\r
- public AttributeTargets Targets;\r
- public bool AllowMultiple;\r
- public bool Inherited;\r
-\r
- public bool UsageAttr = false;\r
- \r
- public MethodImplOptions ImplOptions;\r
- public UnmanagedType UnmanagedType;\r
- \r
- public Attribute (string name, ArrayList args, Location loc)\r
- {\r
- Name = name;\r
- Arguments = args;\r
- Location = loc;\r
- }\r
-\r
- void error617 (string name)\r
- {\r
- Report.Error (617, Location, "'" + name + "' is not a valid named attribute " +\r
- "argument. Named attribute arguments must be fields which are not " +\r
- "readonly, static or const, or properties with a set accessor which "+\r
- "are not static.");\r
- }\r
-\r
- void error182 ()\r
- {\r
- Report.Error (182, Location,\r
- "An attribute argument must be a constant expression, typeof " +\r
- "expression or array creation expression");\r
- }\r
-\r
- public CustomAttributeBuilder Resolve (EmitContext ec)\r
- {\r
- string name = Name;\r
- bool MethodImplAttr = false;\r
- bool MarshalAsAttr = false;\r
-\r
- UsageAttr = false;\r
-\r
- if (Name.IndexOf ("Attribute") == -1)\r
- name = Name + "Attribute";\r
- else if (Name.LastIndexOf ("Attribute") == 0)\r
- name = Name + "Attribute";\r
-\r
- Type = RootContext.LookupType (ec.DeclSpace, name, false, Location);\r
-\r
- if (Type == null) {\r
- Report.Error (\r
- 246, Location, "Could not find attribute '" + Name + "' (are you" +\r
- " missing a using directive or an assembly reference ?)");\r
- return null;\r
- }\r
-\r
- if (Type == TypeManager.attribute_usage_type)\r
- UsageAttr = true;\r
- if (Type == TypeManager.methodimpl_attr_type)\r
- MethodImplAttr = true;\r
- if (Type == TypeManager.marshal_as_attr_type)\r
- MarshalAsAttr = true;\r
- \r
-\r
- // Now we extract the positional and named arguments\r
- \r
- ArrayList pos_args = new ArrayList ();\r
- ArrayList named_args = new ArrayList ();\r
- \r
- if (Arguments != null) {\r
- pos_args = (ArrayList) Arguments [0];\r
- if (Arguments.Count > 1)\r
- named_args = (ArrayList) Arguments [1];\r
- }\r
- \r
- object [] pos_values = new object [pos_args.Count];\r
-\r
- //\r
- // First process positional arguments \r
- //\r
- \r
- int i;\r
- for (i = 0; i < pos_args.Count; i++) {\r
- Argument a = (Argument) pos_args [i];\r
- Expression e;\r
-\r
- if (!a.Resolve (ec, Location))\r
- return null;\r
-\r
- e = a.Expr;\r
- if (e is Constant) {\r
- pos_values [i] = ((Constant) e).GetValue ();\r
-\r
- if (UsageAttr)\r
- this.Targets = (AttributeTargets) pos_values [0];\r
-\r
- if (MethodImplAttr)\r
- this.ImplOptions = (MethodImplOptions) pos_values [0];\r
-\r
- if (MarshalAsAttr)\r
- this.UnmanagedType = (System.Runtime.InteropServices.UnmanagedType) pos_values [0];\r
- \r
- } else { \r
- error182 ();\r
- return null;\r
- }\r
- }\r
-\r
- //\r
- // Now process named arguments\r
- //\r
-\r
- ArrayList field_infos = new ArrayList ();\r
- ArrayList prop_infos = new ArrayList ();\r
- ArrayList field_values = new ArrayList ();\r
- ArrayList prop_values = new ArrayList ();\r
- \r
- for (i = 0; i < named_args.Count; i++) {\r
- DictionaryEntry de = (DictionaryEntry) named_args [i];\r
- string member_name = (string) de.Key;\r
- Argument a = (Argument) de.Value;\r
- Expression e;\r
- \r
- if (!a.Resolve (ec, Location))\r
- return null;\r
-\r
- Expression member = Expression.MemberLookup (\r
- ec, Type, member_name,\r
- MemberTypes.Field | MemberTypes.Property,\r
- BindingFlags.Public | BindingFlags.Instance,\r
- Location);\r
-\r
- if (member == null || !(member is PropertyExpr || member is FieldExpr)) {\r
- error617 (member_name);\r
- return null;\r
- }\r
-\r
- e = a.Expr;\r
- if (member is PropertyExpr) {\r
- PropertyExpr pe = (PropertyExpr) member;\r
- PropertyInfo pi = pe.PropertyInfo;\r
-\r
- if (!pi.CanWrite) {\r
- error617 (member_name);\r
- return null;\r
- }\r
-\r
- if (e is Constant) {\r
- object o = ((Constant) e).GetValue ();\r
- prop_values.Add (o);\r
- \r
- if (UsageAttr) {\r
- if (member_name == "AllowMultiple")\r
- this.AllowMultiple = (bool) o;\r
- if (member_name == "Inherited")\r
- this.Inherited = (bool) o;\r
- }\r
- \r
- } else { \r
- error182 ();\r
- return null;\r
- }\r
- \r
- prop_infos.Add (pi);\r
- \r
- } else if (member is FieldExpr) {\r
- FieldExpr fe = (FieldExpr) member;\r
- FieldInfo fi = fe.FieldInfo;\r
-\r
- if (fi.IsInitOnly) {\r
- error617 (member_name);\r
- return null;\r
- }\r
-\r
- if (e is Constant)\r
- field_values.Add (((Constant) e).GetValue ());\r
- else { \r
- error182 ();\r
- return null;\r
- }\r
- \r
- field_infos.Add (fi);\r
- }\r
- }\r
- \r
- Expression mg = Expression.MemberLookup (\r
- ec, Type, ".ctor", MemberTypes.Constructor,\r
- BindingFlags.Public | BindingFlags.Instance, Location);\r
-\r
- if (mg == null) {\r
- Report.Error (\r
- -6, Location,\r
- "Could not find a constructor for this argument list.");\r
- return null;\r
- }\r
-\r
- MethodBase constructor = Invocation.OverloadResolve (\r
- ec, (MethodGroupExpr) mg, pos_args, Location);\r
-\r
- if (constructor == null) {\r
- Report.Error (\r
- -6, Location,\r
- "Could not find a constructor for this argument list.");\r
- return null;\r
- }\r
- \r
- PropertyInfo [] prop_info_arr = new PropertyInfo [prop_infos.Count];\r
- FieldInfo [] field_info_arr = new FieldInfo [field_infos.Count];\r
- object [] field_values_arr = new object [field_values.Count];\r
- object [] prop_values_arr = new object [prop_values.Count];\r
-\r
- field_infos.CopyTo (field_info_arr, 0);\r
- field_values.CopyTo (field_values_arr, 0);\r
-\r
- prop_values.CopyTo (prop_values_arr, 0);\r
- prop_infos.CopyTo (prop_info_arr, 0);\r
- \r
- CustomAttributeBuilder cb = new CustomAttributeBuilder (\r
- (ConstructorInfo) constructor, pos_values,\r
- prop_info_arr, prop_values_arr,\r
- field_info_arr, field_values_arr); \r
- \r
- return cb;\r
- }\r
-\r
- static string GetValidPlaces (Attribute attr)\r
- {\r
- StringBuilder sb = new StringBuilder ();\r
- AttributeTargets targets = 0;\r
- \r
- TypeContainer a = TypeManager.LookupAttr (attr.Type);\r
-\r
- if (a == null) {\r
- System.Attribute [] attrs = System.Attribute.GetCustomAttributes (attr.Type);\r
- \r
- foreach (System.Attribute tmp in attrs)\r
- if (tmp is AttributeUsageAttribute) \r
- targets = ((AttributeUsageAttribute) tmp).ValidOn;\r
- } else\r
- targets = a.Targets;\r
-\r
- \r
- if ((targets & AttributeTargets.Assembly) != 0)\r
- sb.Append ("'assembly' ");\r
-\r
- if ((targets & AttributeTargets.Class) != 0)\r
- sb.Append ("'class' ");\r
-\r
- if ((targets & AttributeTargets.Constructor) != 0)\r
- sb.Append ("'constructor' ");\r
-\r
- if ((targets & AttributeTargets.Delegate) != 0)\r
- sb.Append ("'delegate' ");\r
-\r
- if ((targets & AttributeTargets.Enum) != 0)\r
- sb.Append ("'enum' ");\r
-\r
- if ((targets & AttributeTargets.Event) != 0)\r
- sb.Append ("'event' ");\r
-\r
- if ((targets & AttributeTargets.Field) != 0)\r
- sb.Append ("'field' ");\r
-\r
- if ((targets & AttributeTargets.Interface) != 0)\r
- sb.Append ("'interface' ");\r
-\r
- if ((targets & AttributeTargets.Method) != 0)\r
- sb.Append ("'method' ");\r
-\r
- if ((targets & AttributeTargets.Module) != 0)\r
- sb.Append ("'module' ");\r
-\r
- if ((targets & AttributeTargets.Parameter) != 0)\r
- sb.Append ("'parameter' ");\r
-\r
- if ((targets & AttributeTargets.Property) != 0)\r
- sb.Append ("'property' ");\r
-\r
- if ((targets & AttributeTargets.ReturnValue) != 0)\r
- sb.Append ("'return value' ");\r
-\r
- if ((targets & AttributeTargets.Struct) != 0)\r
- sb.Append ("'struct' ");\r
-\r
- return sb.ToString ();\r
-\r
- }\r
-\r
- public static void error592 (Attribute a, Location loc)\r
- {\r
- Report.Error (\r
- 592, loc, "Attribute '" + a.Name +\r
- "' is not valid on this declaration type. " +\r
- "It is valid on " + GetValidPlaces (a) + "declarations only.");\r
- }\r
-\r
- public static bool CheckAttribute (Attribute a, object element)\r
- {\r
- TypeContainer attr = TypeManager.LookupAttr (a.Type);\r
- AttributeTargets targets = 0;\r
- \r
- if (attr == null) {\r
- System.Attribute [] attrs = System.Attribute.GetCustomAttributes (a.Type);\r
-\r
- foreach (System.Attribute tmp in attrs)\r
- if (tmp is AttributeUsageAttribute) \r
- targets = ((AttributeUsageAttribute) tmp).ValidOn;\r
- } else\r
- targets = attr.Targets;\r
-\r
- if (element is Class) {\r
- if ((targets & AttributeTargets.Class) != 0)\r
- return true;\r
- else\r
- return false;\r
- \r
- } else if (element is Struct) {\r
- if ((targets & AttributeTargets.Struct) != 0)\r
- return true;\r
- else\r
- return false;\r
- } else if (element is Constructor) {\r
- if ((targets & AttributeTargets.Constructor) != 0)\r
- return true;\r
- else\r
- return false;\r
- } else if (element is Delegate) {\r
- if ((targets & AttributeTargets.Delegate) != 0)\r
- return true;\r
- else\r
- return false;\r
- } else if (element is Enum) {\r
- if ((targets & AttributeTargets.Enum) != 0)\r
- return true;\r
- else\r
- return false;\r
- } else if (element is Event) {\r
- if ((targets & AttributeTargets.Event) != 0)\r
- return true;\r
- else\r
- return false;\r
- } else if (element is Field) {\r
- if ((targets & AttributeTargets.Field) != 0)\r
- return true;\r
- else\r
- return false;\r
- } else if (element is Interface) {\r
- if ((targets & AttributeTargets.Interface) != 0)\r
- return true;\r
- else\r
- return false;\r
- } else if (element is Method || element is Operator) {\r
- if ((targets & AttributeTargets.Method) != 0)\r
- return true;\r
- else\r
- return false;\r
- } else if (element is ParameterBuilder) {\r
- if ((targets & AttributeTargets.Parameter) != 0)\r
- return true;\r
- else\r
- return false;\r
- } else if (element is Property) {\r
- if ((targets & AttributeTargets.Property) != 0)\r
- return true;\r
- else\r
- return false;\r
- } else if (element is AssemblyBuilder){\r
- if ((targets & AttributeTargets.Assembly) != 0)\r
- return true;\r
- else\r
- return false;\r
- }\r
-\r
- return false;\r
- }\r
-\r
- public static void ApplyAttributes (EmitContext ec, object builder, object kind,\r
- Attributes opt_attrs, Location loc)\r
- {\r
- if (opt_attrs == null)\r
- return;\r
-\r
- if (opt_attrs.AttributeSections == null)\r
- return;\r
-\r
- foreach (AttributeSection asec in opt_attrs.AttributeSections) {\r
-\r
- if (asec.Attributes == null)\r
- continue;\r
-\r
- foreach (Attribute a in asec.Attributes) {\r
- CustomAttributeBuilder cb = a.Resolve (ec);\r
- if (cb == null)\r
- continue;\r
-\r
- if (!(kind is TypeContainer))\r
- if (!CheckAttribute (a, kind)) {\r
- error592 (a, loc);\r
- return;\r
- }\r
-\r
- \r
- if (kind is Method || kind is Operator) {\r
-\r
- if (a.Type == TypeManager.methodimpl_attr_type) {\r
- if (a.ImplOptions == MethodImplOptions.InternalCall)\r
- ((MethodBuilder) builder).SetImplementationFlags (\r
- MethodImplAttributes.InternalCall |\r
- MethodImplAttributes.Runtime);\r
- } else if (a.Type != TypeManager.dllimport_type)\r
- ((MethodBuilder) builder).SetCustomAttribute (cb);\r
-\r
- } else if (kind is Constructor) {\r
- ((ConstructorBuilder) builder).SetCustomAttribute (cb);\r
- } else if (kind is Field) {\r
- ((FieldBuilder) builder).SetCustomAttribute (cb);\r
- } else if (kind is Property || kind is Indexer) {\r
- ((PropertyBuilder) builder).SetCustomAttribute (cb);\r
- } else if (kind is Event) {\r
- ((EventBuilder) builder).SetCustomAttribute (cb);\r
- } else if (kind is ParameterBuilder) {\r
-\r
- if (a.Type == TypeManager.marshal_as_attr_type) {\r
- UnmanagedMarshal marshal =\r
- UnmanagedMarshal.DefineUnmanagedMarshal (a.UnmanagedType);\r
- \r
- ((ParameterBuilder) builder).SetMarshal (marshal);\r
- } else \r
- ((ParameterBuilder) builder).SetCustomAttribute (cb);\r
- \r
- } else if (kind is Enum) {\r
- ((TypeBuilder) builder).SetCustomAttribute (cb); \r
-\r
- } else if (kind is TypeContainer) {\r
-\r
- TypeContainer tc = (TypeContainer) kind;\r
- \r
- if (a.UsageAttr) {\r
- tc.Targets = a.Targets;\r
- tc.AllowMultiple = a.AllowMultiple;\r
- tc.Inherited = a.Inherited;\r
- \r
- RootContext.TypeManager.RegisterAttrType (\r
- (TypeBuilder) builder, tc);\r
-\r
- } else if (a.Type == TypeManager.default_member_type) {\r
- if (tc.Indexers != null) {\r
- Report.Error (646, loc,\r
- "Cannot specify the DefaultMember attribute on " +\r
- " a type containing an indexer");\r
- return;\r
- }\r
-\r
- } else {\r
- if (!CheckAttribute (a, kind)) {\r
- error592 (a, loc);\r
- return;\r
- }\r
- }\r
- \r
- ((TypeBuilder) builder).SetCustomAttribute (cb);\r
- \r
- } else if (kind is AssemblyBuilder){\r
- ((AssemblyBuilder) builder).SetCustomAttribute (cb);\r
- } else if (kind is ModuleBuilder) {\r
- ((ModuleBuilder) builder).SetCustomAttribute (cb);\r
- } else\r
- throw new Exception ("Unknown kind: " + kind);\r
- }\r
- }\r
- }\r
-\r
- public MethodBuilder DefinePInvokeMethod (EmitContext ec, TypeBuilder builder, string name,\r
- MethodAttributes flags, Type ret_type, Type [] param_types)\r
- {\r
- //\r
- // We extract from the attribute the information we need \r
- //\r
-\r
- if (Arguments == null) {\r
- Console.WriteLine ("Internal error : this is not supposed to happen !");\r
- return null;\r
- }\r
-\r
- string attr_name = Name;\r
-\r
- if (Name.IndexOf ("Attribute") == -1)\r
- attr_name = Name + "Attribute";\r
- else if (Name.LastIndexOf ("Attribute") == 0)\r
- attr_name = Name + "Attribute";\r
- \r
- Type = RootContext.LookupType (ec.DeclSpace, attr_name, false, Location);\r
-\r
- if (Type == null) {\r
- Report.Error (246, Location, "Could not find attribute '" + Name + "' (are you" +\r
- " missing a using directive or an assembly reference ?)");\r
- return null;\r
- }\r
- \r
- ArrayList named_args = new ArrayList ();\r
- \r
- ArrayList pos_args = (ArrayList) Arguments [0];\r
- if (Arguments.Count > 1)\r
- named_args = (ArrayList) Arguments [1];\r
- \r
-\r
- string dll_name = null;\r
- \r
- Argument tmp = (Argument) pos_args [0];\r
-\r
- if (!tmp.Resolve (ec, Location))\r
- return null;\r
- \r
- if (tmp.Expr is Constant)\r
- dll_name = (string) ((Constant) tmp.Expr).GetValue ();\r
- else { \r
- error182 ();\r
- return null;\r
- }\r
-\r
- // Now we process the named arguments\r
- CallingConvention cc = CallingConvention.Winapi;\r
- CharSet charset = CharSet.Ansi;\r
- bool preserve_sig = true;\r
- bool exact_spelling = false;\r
- bool set_last_err = false;\r
- string entry_point = null;\r
-\r
- for (int i = 0; i < named_args.Count; i++) {\r
-\r
- DictionaryEntry de = (DictionaryEntry) named_args [i];\r
-\r
- string member_name = (string) de.Key;\r
- Argument a = (Argument) de.Value;\r
-\r
- if (!a.Resolve (ec, Location))\r
- return null;\r
-\r
- Expression member = Expression.MemberLookup (\r
- ec, Type, member_name, \r
- MemberTypes.Field | MemberTypes.Property,\r
- BindingFlags.Public | BindingFlags.Instance,\r
- Location);\r
-\r
- if (member == null || !(member is FieldExpr)) {\r
- error617 (member_name);\r
- return null;\r
- }\r
-\r
- if (member is FieldExpr) {\r
- FieldExpr fe = (FieldExpr) member;\r
- FieldInfo fi = fe.FieldInfo;\r
-\r
- if (fi.IsInitOnly) {\r
- error617 (member_name);\r
- return null;\r
- }\r
-\r
- if (a.Expr is Constant) {\r
- Constant c = (Constant) a.Expr;\r
- \r
- if (member_name == "CallingConvention")\r
- cc = (CallingConvention) c.GetValue ();\r
- else if (member_name == "CharSet")\r
- charset = (CharSet) c.GetValue ();\r
- else if (member_name == "EntryPoint")\r
- entry_point = (string) c.GetValue ();\r
- else if (member_name == "SetLastError")\r
- set_last_err = (bool) c.GetValue ();\r
- else if (member_name == "ExactSpelling")\r
- exact_spelling = (bool) c.GetValue ();\r
- else if (member_name == "PreserveSig")\r
- preserve_sig = (bool) c.GetValue ();\r
- } else { \r
- error182 ();\r
- return null;\r
- }\r
- \r
- }\r
- }\r
-\r
- MethodBuilder mb = builder.DefinePInvokeMethod (\r
- name, dll_name, flags | MethodAttributes.HideBySig,\r
- CallingConventions.Standard,\r
- ret_type,\r
- param_types,\r
- cc,\r
- charset);\r
-\r
- if (preserve_sig)\r
- mb.SetImplementationFlags (MethodImplAttributes.PreserveSig);\r
- \r
- return mb;\r
- }\r
- \r
- }\r
- \r
- public class AttributeSection {\r
- \r
- public readonly string Target;\r
- public readonly ArrayList Attributes;\r
- \r
- public AttributeSection (string target, ArrayList attrs)\r
- {\r
- Target = target;\r
- Attributes = attrs;\r
- }\r
- \r
- }\r
-\r
- public class Attributes {\r
- public ArrayList AttributeSections;\r
- public Location Location;\r
-\r
- public Attributes (AttributeSection a, Location loc)\r
- {\r
- AttributeSections = new ArrayList ();\r
- AttributeSections.Add (a);\r
-\r
- }\r
-\r
- public void AddAttribute (AttributeSection a)\r
- {\r
- if (a != null)\r
- AttributeSections.Add (a);\r
- }\r
- }\r
-}\r
+//
+// attribute.cs: Attribute Handler
+//
+// Author: Ravi Pratap (ravi@ximian.com)
+//
+// Licensed under the terms of the GNU GPL
+//
+// (C) 2001 Ximian, Inc (http://www.ximian.com)
+//
+//
+
+using System;
+using System.Diagnostics;
+using System.Collections;
+using System.Reflection;
+using System.Reflection.Emit;
+using System.Runtime.InteropServices;
+using System.Runtime.CompilerServices;
+using System.Text;
+
+namespace Mono.CSharp {
+
+ public class Attribute {
+ public readonly string Name;
+ public readonly ArrayList Arguments;
+
+ Location Location;
+
+ public Type Type;
+
+ //
+ // The following are only meaningful when the attribute
+ // being emitted is one of the builtin ones
+ //
+ AttributeTargets Targets;
+ bool AllowMultiple;
+ bool Inherited;
+
+ bool UsageAttr = false;
+
+ MethodImplOptions ImplOptions;
+ UnmanagedType UnmanagedType;
+ CustomAttributeBuilder cb;
+
+ public Attribute (string name, ArrayList args, Location loc)
+ {
+ Name = name;
+ Arguments = args;
+ Location = loc;
+ }
+
+ void Error_InvalidNamedArgument (string name)
+ {
+ Report.Error (617, Location, "'" + name + "' is not a valid named attribute " +
+ "argument. Named attribute arguments must be fields which are not " +
+ "readonly, static or const, or properties with a set accessor which "+
+ "are not static.");
+ }
+
+ void Error_AttributeArgumentNotValid ()
+ {
+ Report.Error (182, Location,
+ "An attribute argument must be a constant expression, typeof " +
+ "expression or array creation expression");
+ }
+
+ static void Error_AttributeConstructorMismatch (Location loc)
+ {
+ Report.Error (
+ -6, loc,
+ "Could not find a constructor for this argument list.");
+ }
+
+ private Type CheckAttributeType (EmitContext ec) {
+ Type t;
+ bool isattributeclass = true;
+
+ t = RootContext.LookupType (ec.DeclSpace, Name, true, Location);
+ if (t != null) {
+ isattributeclass = t.IsSubclassOf (TypeManager.attribute_type);
+ if (isattributeclass)
+ return t;
+ }
+ t = RootContext.LookupType (ec.DeclSpace, Name + "Attribute", true, Location);
+ if (t != null) {
+ if (t.IsSubclassOf (TypeManager.attribute_type))
+ return t;
+ }
+ if (!isattributeclass) {
+ Report.Error (616, Location, "'" + Name + "': is not an attribute class");
+ return null;
+ }
+ if (t != null) {
+ Report.Error (616, Location, "'" + Name + "Attribute': is not an attribute class");
+ return null;
+ }
+ Report.Error (
+ 246, Location, "Could not find attribute '" + Name + "' (are you" +
+ " missing a using directive or an assembly reference ?)");
+ return null;
+ }
+
+ public Type ResolveType (EmitContext ec)
+ {
+ Type = CheckAttributeType (ec);
+ return Type;
+ }
+
+
+ public CustomAttributeBuilder Resolve (EmitContext ec)
+ {
+ if (Type == null)
+ Type = CheckAttributeType (ec);
+ if (Type == null)
+ return null;
+
+ bool MethodImplAttr = false;
+ bool MarshalAsAttr = false;
+
+ UsageAttr = false;
+
+ if (Type == TypeManager.attribute_usage_type)
+ UsageAttr = true;
+ if (Type == TypeManager.methodimpl_attr_type)
+ MethodImplAttr = true;
+ if (Type == TypeManager.marshal_as_attr_type)
+ MarshalAsAttr = true;
+
+ // Now we extract the positional and named arguments
+
+ ArrayList pos_args = new ArrayList ();
+ ArrayList named_args = new ArrayList ();
+ int pos_arg_count = 0;
+
+ if (Arguments != null) {
+ pos_args = (ArrayList) Arguments [0];
+ if (pos_args != null)
+ pos_arg_count = pos_args.Count;
+ if (Arguments.Count > 1)
+ named_args = (ArrayList) Arguments [1];
+ }
+
+ object [] pos_values = new object [pos_arg_count];
+
+ //
+ // First process positional arguments
+ //
+
+ int i;
+ for (i = 0; i < pos_arg_count; i++) {
+ Argument a = (Argument) pos_args [i];
+ Expression e;
+
+ if (!a.Resolve (ec, Location))
+ return null;
+
+ e = a.Expr;
+
+ if (e is Constant) {
+ pos_values [i] = ((Constant) e).GetValue ();
+ } else if (e is TypeOf) {
+ pos_values [i] = ((TypeOf) e).TypeArg;
+ } else {
+ Error_AttributeArgumentNotValid ();
+ return null;
+ }
+
+ if (UsageAttr)
+ this.Targets = (AttributeTargets) pos_values [0];
+
+ if (MethodImplAttr)
+ this.ImplOptions = (MethodImplOptions) pos_values [0];
+
+ if (MarshalAsAttr)
+ this.UnmanagedType =
+ (System.Runtime.InteropServices.UnmanagedType) pos_values [0];
+ }
+
+ //
+ // Now process named arguments
+ //
+
+ ArrayList field_infos = new ArrayList ();
+ ArrayList prop_infos = new ArrayList ();
+ ArrayList field_values = new ArrayList ();
+ ArrayList prop_values = new ArrayList ();
+
+ for (i = 0; i < named_args.Count; i++) {
+ DictionaryEntry de = (DictionaryEntry) named_args [i];
+ string member_name = (string) de.Key;
+ Argument a = (Argument) de.Value;
+ Expression e;
+
+ if (!a.Resolve (ec, Location))
+ return null;
+
+ Expression member = Expression.MemberLookup (
+ ec, Type, member_name,
+ MemberTypes.Field | MemberTypes.Property,
+ BindingFlags.Public | BindingFlags.Instance,
+ Location);
+
+ if (member == null || !(member is PropertyExpr || member is FieldExpr)) {
+ Error_InvalidNamedArgument (member_name);
+ return null;
+ }
+
+ e = a.Expr;
+ if (member is PropertyExpr) {
+ PropertyExpr pe = (PropertyExpr) member;
+ PropertyInfo pi = pe.PropertyInfo;
+
+ if (!pi.CanWrite) {
+ Error_InvalidNamedArgument (member_name);
+ return null;
+ }
+
+ if (e is Constant) {
+ object o = ((Constant) e).GetValue ();
+ prop_values.Add (o);
+
+ if (UsageAttr) {
+ if (member_name == "AllowMultiple")
+ this.AllowMultiple = (bool) o;
+ if (member_name == "Inherited")
+ this.Inherited = (bool) o;
+ }
+
+ } else if (e is TypeOf) {
+ prop_values.Add (((TypeOf) e).TypeArg);
+ } else {
+ Error_AttributeArgumentNotValid ();
+ return null;
+ }
+
+ prop_infos.Add (pi);
+
+ } else if (member is FieldExpr) {
+ FieldExpr fe = (FieldExpr) member;
+ FieldInfo fi = fe.FieldInfo;
+
+ if (fi.IsInitOnly) {
+ Error_InvalidNamedArgument (member_name);
+ return null;
+ }
+
+ //
+ // Handle charset here, and set the TypeAttributes
+
+ if (e is Constant){
+ object value = ((Constant) e).GetValue ();
+
+ field_values.Add (value);
+ } else if (e is TypeOf) {
+ field_values.Add (((TypeOf) e).TypeArg);
+ } else {
+ Error_AttributeArgumentNotValid ();
+ return null;
+ }
+
+ field_infos.Add (fi);
+ }
+ }
+
+ Expression mg = Expression.MemberLookup (
+ ec, Type, ".ctor", MemberTypes.Constructor,
+ BindingFlags.Public | BindingFlags.Instance, Location);
+
+ if (mg == null) {
+ Error_AttributeConstructorMismatch (Location);
+ return null;
+ }
+
+ MethodBase constructor = Invocation.OverloadResolve (
+ ec, (MethodGroupExpr) mg, pos_args, Location);
+
+ if (constructor == null) {
+ Error_AttributeConstructorMismatch (Location);
+ return null;
+ }
+
+ //
+ // Now we perform some checks on the positional args as they
+ // cannot be null for a constructor which expects a parameter
+ // of type object
+ //
+
+ ParameterData pd = Invocation.GetParameterData (constructor);
+
+ for (int j = 0; j < pos_arg_count; ++j) {
+ Argument a = (Argument) pos_args [j];
+
+ if (a.Expr is NullLiteral && pd.ParameterType (j) == TypeManager.object_type) {
+ Error_AttributeArgumentNotValid ();
+ return null;
+ }
+ }
+
+ PropertyInfo [] prop_info_arr = new PropertyInfo [prop_infos.Count];
+ FieldInfo [] field_info_arr = new FieldInfo [field_infos.Count];
+ object [] field_values_arr = new object [field_values.Count];
+ object [] prop_values_arr = new object [prop_values.Count];
+
+ field_infos.CopyTo (field_info_arr, 0);
+ field_values.CopyTo (field_values_arr, 0);
+
+ prop_values.CopyTo (prop_values_arr, 0);
+ prop_infos.CopyTo (prop_info_arr, 0);
+
+ try {
+ cb = new CustomAttributeBuilder (
+ (ConstructorInfo) constructor, pos_values,
+ prop_info_arr, prop_values_arr,
+ field_info_arr, field_values_arr);
+
+ } catch (NullReferenceException) {
+ //
+ // Don't know what to do here
+ //
+ } catch {
+ //
+ // Sample:
+ // using System.ComponentModel;
+ // [DefaultValue (CollectionChangeAction.Add)]
+ // class X { static void Main () {} }
+ //
+ Report.Warning (
+ -23, Location,
+ "The compiler can not encode this attribute in .NET due to\n" +
+ "\ta bug in the .NET runtime. Try the Mono runtime");
+ }
+
+ return cb;
+ }
+
+ static string GetValidPlaces (Attribute attr)
+ {
+ StringBuilder sb = new StringBuilder ();
+ AttributeTargets targets = 0;
+
+ TypeContainer a = TypeManager.LookupAttr (attr.Type);
+
+ if (a == null) {
+
+ System.Attribute [] attrs = null;
+
+ try {
+ attrs = System.Attribute.GetCustomAttributes (attr.Type);
+
+ } catch {
+ Report.Error (-20, attr.Location, "Cannot find attribute type " + attr.Name +
+ " (maybe you forgot to set the usage using the" +
+ " AttributeUsage attribute ?).");
+ return null;
+ }
+
+ foreach (System.Attribute tmp in attrs)
+ if (tmp is AttributeUsageAttribute) {
+ targets = ((AttributeUsageAttribute) tmp).ValidOn;
+ break;
+ }
+ } else
+ targets = a.Targets;
+
+
+ if ((targets & AttributeTargets.Assembly) != 0)
+ sb.Append ("'assembly' ");
+
+ if ((targets & AttributeTargets.Class) != 0)
+ sb.Append ("'class' ");
+
+ if ((targets & AttributeTargets.Constructor) != 0)
+ sb.Append ("'constructor' ");
+
+ if ((targets & AttributeTargets.Delegate) != 0)
+ sb.Append ("'delegate' ");
+
+ if ((targets & AttributeTargets.Enum) != 0)
+ sb.Append ("'enum' ");
+
+ if ((targets & AttributeTargets.Event) != 0)
+ sb.Append ("'event' ");
+
+ if ((targets & AttributeTargets.Field) != 0)
+ sb.Append ("'field' ");
+
+ if ((targets & AttributeTargets.Interface) != 0)
+ sb.Append ("'interface' ");
+
+ if ((targets & AttributeTargets.Method) != 0)
+ sb.Append ("'method' ");
+
+ if ((targets & AttributeTargets.Module) != 0)
+ sb.Append ("'module' ");
+
+ if ((targets & AttributeTargets.Parameter) != 0)
+ sb.Append ("'parameter' ");
+
+ if ((targets & AttributeTargets.Property) != 0)
+ sb.Append ("'property' ");
+
+ if ((targets & AttributeTargets.ReturnValue) != 0)
+ sb.Append ("'return value' ");
+
+ if ((targets & AttributeTargets.Struct) != 0)
+ sb.Append ("'struct' ");
+
+ return sb.ToString ();
+
+ }
+
+ public static void Error_AttributeNotValidForElement (Attribute a, Location loc)
+ {
+ Report.Error (
+ 592, loc, "Attribute '" + a.Name +
+ "' is not valid on this declaration type. " +
+ "It is valid on " + GetValidPlaces (a) + "declarations only.");
+ }
+
+ public static bool CheckAttribute (Attribute a, object element)
+ {
+ TypeContainer attr = TypeManager.LookupAttr (a.Type);
+ AttributeTargets targets = 0;
+
+
+ if (attr == null) {
+
+ System.Attribute [] attrs = null;
+
+ try {
+ attrs = System.Attribute.GetCustomAttributes (a.Type);
+
+ } catch {
+ Report.Error (-20, a.Location, "Cannot find attribute type " + a.Name +
+ " (maybe you forgot to set the usage using the" +
+ " AttributeUsage attribute ?).");
+ return false;
+ }
+
+ foreach (System.Attribute tmp in attrs)
+ if (tmp is AttributeUsageAttribute)
+ targets = ((AttributeUsageAttribute) tmp).ValidOn;
+ } else
+ targets = attr.Targets;
+
+ if (element is Class) {
+ if ((targets & AttributeTargets.Class) != 0)
+ return true;
+ else
+ return false;
+
+ } else if (element is Struct) {
+ if ((targets & AttributeTargets.Struct) != 0)
+ return true;
+ else
+ return false;
+ } else if (element is Constructor) {
+ if ((targets & AttributeTargets.Constructor) != 0)
+ return true;
+ else
+ return false;
+ } else if (element is Delegate) {
+ if ((targets & AttributeTargets.Delegate) != 0)
+ return true;
+ else
+ return false;
+ } else if (element is Enum) {
+ if ((targets & AttributeTargets.Enum) != 0)
+ return true;
+ else
+ return false;
+ } else if (element is Event || element is InterfaceEvent) {
+ if ((targets & AttributeTargets.Event) != 0)
+ return true;
+ else
+ return false;
+ } else if (element is Field || element is FieldBuilder) {
+ if ((targets & AttributeTargets.Field) != 0)
+ return true;
+ else
+ return false;
+ } else if (element is Interface) {
+ if ((targets & AttributeTargets.Interface) != 0)
+ return true;
+ else
+ return false;
+ } else if (element is Method || element is Operator || element is InterfaceMethod || element is Accessor) {
+ if ((targets & AttributeTargets.Method) != 0)
+ return true;
+ else
+ return false;
+ } else if (element is ParameterBuilder) {
+ if ((targets & AttributeTargets.Parameter) != 0)
+ return true;
+ else
+ return false;
+ } else if (element is Property || element is Indexer ||
+ element is InterfaceProperty || element is InterfaceIndexer) {
+ if ((targets & AttributeTargets.Property) != 0)
+ return true;
+ else
+ return false;
+ } else if (element is AssemblyBuilder){
+ if ((targets & AttributeTargets.Assembly) != 0)
+ return true;
+ else
+ return false;
+ }
+
+ return false;
+ }
+
+ //
+ // This method should be invoked to pull the IndexerName attribute from an
+ // Indexer if it exists.
+ //
+ public static string ScanForIndexerName (EmitContext ec, Attributes opt_attrs)
+ {
+ if (opt_attrs == null)
+ return null;
+ if (opt_attrs.AttributeSections == null)
+ return null;
+
+ foreach (AttributeSection asec in opt_attrs.AttributeSections) {
+ if (asec.Attributes == null)
+ continue;
+
+ foreach (Attribute a in asec.Attributes){
+ if (a.ResolveType (ec) == null)
+ return null;
+
+ if (a.Type != TypeManager.indexer_name_type)
+ continue;
+
+ //
+ // So we have found an IndexerName, pull the data out.
+ //
+ if (a.Arguments == null || a.Arguments [0] == null){
+ Error_AttributeConstructorMismatch (a.Location);
+ return null;
+ }
+ ArrayList pos_args = (ArrayList) a.Arguments [0];
+ if (pos_args.Count == 0){
+ Error_AttributeConstructorMismatch (a.Location);
+ return null;
+ }
+
+ Argument arg = (Argument) pos_args [0];
+ if (!arg.Resolve (ec, a.Location))
+ return null;
+
+ Expression e = arg.Expr;
+ if (!(e is StringConstant)){
+ Error_AttributeConstructorMismatch (a.Location);
+ return null;
+ }
+
+ //
+ // Remove the attribute from the list
+ //
+ asec.Attributes.Remove (a);
+
+ return (((StringConstant) e).Value);
+ }
+ }
+ return null;
+ }
+
+ //
+ // This pulls the condition name out of a Conditional attribute
+ //
+ public string Conditional_GetConditionName ()
+ {
+ //
+ // So we have a Conditional, pull the data out.
+ //
+ if (Arguments == null || Arguments [0] == null){
+ Error_AttributeConstructorMismatch (Location);
+ return null;
+ }
+
+ ArrayList pos_args = (ArrayList) Arguments [0];
+ if (pos_args.Count != 1){
+ Error_AttributeConstructorMismatch (Location);
+ return null;
+ }
+
+ Argument arg = (Argument) pos_args [0];
+ if (!(arg.Expr is StringConstant)){
+ Error_AttributeConstructorMismatch (Location);
+ return null;
+ }
+
+ return ((StringConstant) arg.Expr).Value;
+ }
+
+ //
+ // This pulls the obsolete message and error flag out of an Obsolete attribute
+ //
+ public string Obsolete_GetObsoleteMessage (out bool is_error)
+ {
+ is_error = false;
+ //
+ // So we have an Obsolete, pull the data out.
+ //
+ if (Arguments == null || Arguments [0] == null)
+ return "";
+
+ ArrayList pos_args = (ArrayList) Arguments [0];
+ if (pos_args.Count == 0)
+ return "";
+ else if (pos_args.Count > 2){
+ Error_AttributeConstructorMismatch (Location);
+ return null;
+ }
+
+ Argument arg = (Argument) pos_args [0];
+ if (!(arg.Expr is StringConstant)){
+ Error_AttributeConstructorMismatch (Location);
+ return null;
+ }
+
+ if (pos_args.Count == 2){
+ Argument arg2 = (Argument) pos_args [1];
+ if (!(arg2.Expr is BoolConstant)){
+ Error_AttributeConstructorMismatch (Location);
+ return null;
+ }
+ is_error = ((BoolConstant) arg2.Expr).Value;
+ }
+
+ return ((StringConstant) arg.Expr).Value;
+ }
+
+ //
+ // Applies the attributes to the `builder'.
+ //
+ public static void ApplyAttributes (EmitContext ec, object builder, object kind,
+ Attributes opt_attrs, Location loc)
+ {
+ if (opt_attrs == null)
+ return;
+ if (opt_attrs.AttributeSections == null)
+ return;
+
+ foreach (AttributeSection asec in opt_attrs.AttributeSections) {
+ if (asec.Attributes == null)
+ continue;
+
+ if (asec.Target == "assembly" && !(builder is AssemblyBuilder))
+ continue;
+
+ foreach (Attribute a in asec.Attributes) {
+ CustomAttributeBuilder cb = a.Resolve (ec);
+
+ if (cb == null)
+ continue;
+
+ if (!(kind is TypeContainer))
+ if (!CheckAttribute (a, kind)) {
+ Error_AttributeNotValidForElement (a, loc);
+ return;
+ }
+
+ if (kind is Method || kind is Operator || kind is InterfaceMethod ||
+ kind is Accessor) {
+ if (a.Type == TypeManager.methodimpl_attr_type) {
+ if (a.ImplOptions == MethodImplOptions.InternalCall)
+ ((MethodBuilder) builder).
+ SetImplementationFlags (
+ MethodImplAttributes.InternalCall |
+ MethodImplAttributes.Runtime);
+ } else if (a.Type != TypeManager.dllimport_type){
+ ((MethodBuilder) builder).SetCustomAttribute (cb);
+ }
+ } else if (kind is Constructor) {
+ ((ConstructorBuilder) builder).SetCustomAttribute (cb);
+ } else if (kind is Field) {
+ ((FieldBuilder) builder).SetCustomAttribute (cb);
+ } else if (kind is Property || kind is Indexer ||
+ kind is InterfaceProperty || kind is InterfaceIndexer) {
+ ((PropertyBuilder) builder).SetCustomAttribute (cb);
+ } else if (kind is Event || kind is InterfaceEvent) {
+ ((MyEventBuilder) builder).SetCustomAttribute (cb);
+ } else if (kind is ParameterBuilder) {
+
+ if (a.Type == TypeManager.marshal_as_attr_type) {
+ UnmanagedMarshal marshal =
+ UnmanagedMarshal.DefineUnmanagedMarshal (a.UnmanagedType);
+
+ ((ParameterBuilder) builder).SetMarshal (marshal);
+ } else
+ ((ParameterBuilder) builder).SetCustomAttribute (cb);
+
+ } else if (kind is Enum) {
+ ((TypeBuilder) builder).SetCustomAttribute (cb);
+
+ } else if (kind is TypeContainer) {
+ TypeContainer tc = (TypeContainer) kind;
+
+ if (a.UsageAttr) {
+ tc.Targets = a.Targets;
+ tc.AllowMultiple = a.AllowMultiple;
+ tc.Inherited = a.Inherited;
+
+ } else if (a.Type == TypeManager.default_member_type) {
+ if (tc.Indexers != null) {
+ Report.Error (646, loc,
+ "Cannot specify the DefaultMember attribute on" +
+ " a type containing an indexer");
+ return;
+ }
+
+ } else {
+ if (!CheckAttribute (a, kind)) {
+ Error_AttributeNotValidForElement (a, loc);
+ return;
+ }
+ }
+
+ try {
+ ((TypeBuilder) builder).SetCustomAttribute (cb);
+ } catch (System.ArgumentException) {
+ Report.Warning (
+ -21, loc,
+ "The CharSet named property on StructLayout\n"+
+ "\tdoes not work correctly on Microsoft.NET\n"+
+ "\tYou might want to remove the CharSet declaration\n"+
+ "\tor compile using the Mono runtime instead of the\n"+
+ "\tMicrosoft .NET runtime");
+ }
+
+ } else if (kind is Interface) {
+ Interface iface = (Interface) kind;
+
+ if ((a.Type == TypeManager.default_member_type) &&
+ (iface.InterfaceIndexers != null)) {
+ Report.Error (
+ 646, loc,
+ "Cannot specify the DefaultMember attribute on" +
+ " a type containing an indexer");
+ return;
+ }
+
+ if (!CheckAttribute (a, kind)) {
+ Error_AttributeNotValidForElement (a, loc);
+ return;
+ }
+
+ ((TypeBuilder) builder).SetCustomAttribute (cb);
+ } else if (kind is AssemblyBuilder){
+ ((AssemblyBuilder) builder).SetCustomAttribute (cb);
+ } else if (kind is ModuleBuilder) {
+ ((ModuleBuilder) builder).SetCustomAttribute (cb);
+ } else if (kind is FieldBuilder) {
+ ((FieldBuilder) builder).SetCustomAttribute (cb);
+ } else
+ throw new Exception ("Unknown kind: " + kind);
+ }
+ }
+ }
+
+ public MethodBuilder DefinePInvokeMethod (EmitContext ec, TypeBuilder builder, string name,
+ MethodAttributes flags, Type ret_type, Type [] param_types)
+ {
+ //
+ // We extract from the attribute the information we need
+ //
+
+ if (Arguments == null) {
+ Console.WriteLine ("Internal error : this is not supposed to happen !");
+ return null;
+ }
+
+ Type = CheckAttributeType (ec);
+ if (Type == null)
+ return null;
+
+ ArrayList named_args = new ArrayList ();
+
+ ArrayList pos_args = (ArrayList) Arguments [0];
+ if (Arguments.Count > 1)
+ named_args = (ArrayList) Arguments [1];
+
+
+ string dll_name = null;
+
+ Argument tmp = (Argument) pos_args [0];
+
+ if (!tmp.Resolve (ec, Location))
+ return null;
+
+ if (tmp.Expr is Constant)
+ dll_name = (string) ((Constant) tmp.Expr).GetValue ();
+ else {
+ Error_AttributeArgumentNotValid ();
+ return null;
+ }
+
+ // Now we process the named arguments
+ CallingConvention cc = CallingConvention.Winapi;
+ CharSet charset = CharSet.Ansi;
+ bool preserve_sig = true;
+ bool exact_spelling = false;
+ bool set_last_err = false;
+ string entry_point = null;
+
+ for (int i = 0; i < named_args.Count; i++) {
+
+ DictionaryEntry de = (DictionaryEntry) named_args [i];
+
+ string member_name = (string) de.Key;
+ Argument a = (Argument) de.Value;
+
+ if (!a.Resolve (ec, Location))
+ return null;
+
+ Expression member = Expression.MemberLookup (
+ ec, Type, member_name,
+ MemberTypes.Field | MemberTypes.Property,
+ BindingFlags.Public | BindingFlags.Instance,
+ Location);
+
+ if (member == null || !(member is FieldExpr)) {
+ Error_InvalidNamedArgument (member_name);
+ return null;
+ }
+
+ if (member is FieldExpr) {
+ FieldExpr fe = (FieldExpr) member;
+ FieldInfo fi = fe.FieldInfo;
+
+ if (fi.IsInitOnly) {
+ Error_InvalidNamedArgument (member_name);
+ return null;
+ }
+
+ if (a.Expr is Constant) {
+ Constant c = (Constant) a.Expr;
+
+ if (member_name == "CallingConvention")
+ cc = (CallingConvention) c.GetValue ();
+ else if (member_name == "CharSet")
+ charset = (CharSet) c.GetValue ();
+ else if (member_name == "EntryPoint")
+ entry_point = (string) c.GetValue ();
+ else if (member_name == "SetLastError")
+ set_last_err = (bool) c.GetValue ();
+ else if (member_name == "ExactSpelling")
+ exact_spelling = (bool) c.GetValue ();
+ else if (member_name == "PreserveSig")
+ preserve_sig = (bool) c.GetValue ();
+ } else {
+ Error_AttributeArgumentNotValid ();
+ return null;
+ }
+
+ }
+ }
+
+ if (entry_point == null)
+ entry_point = name;
+
+ MethodBuilder mb = builder.DefinePInvokeMethod (
+ name, dll_name, entry_point, flags | MethodAttributes.HideBySig,
+ CallingConventions.Standard,
+ ret_type,
+ param_types,
+ cc,
+ charset);
+
+ if (preserve_sig)
+ mb.SetImplementationFlags (MethodImplAttributes.PreserveSig);
+
+ return mb;
+ }
+ }
+
+ public class AttributeSection {
+
+ public readonly string Target;
+ public readonly ArrayList Attributes;
+
+ public AttributeSection (string target, ArrayList attrs)
+ {
+ Target = target;
+ Attributes = attrs;
+ }
+
+ }
+
+ public class Attributes {
+ public ArrayList AttributeSections;
+ public Location Location;
+
+ public Attributes (AttributeSection a, Location loc)
+ {
+ AttributeSections = new ArrayList ();
+ AttributeSections.Add (a);
+
+ }
+
+ public void AddAttribute (AttributeSection a)
+ {
+ if (a != null)
+ AttributeSections.Add (a);
+ }
+
+ public void AddAttributeSection (AttributeSection a)
+ {
+ if (a != null && !AttributeSections.Contains (a))
+ AttributeSections.Add (a);
+ }
+
+ public bool Contains (Type t)
+ {
+ foreach (AttributeSection attr_section in AttributeSections){
+ foreach (Attribute a in attr_section.Attributes){
+ if (a.Type == t)
+ return true;
+ }
+ }
+ return false;
+ }
+ }
+}
projects / mono.git / blobdiff