-// -*- coding: dos -*-\r
-//\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.Diagnostics;\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
- public readonly Location Location;\r
-\r
- public Type Type;\r
- \r
- //\r
- // The following are only meaningful when the attribute\r
- // being emitted is an AttributeUsage attribute\r
- //\r
- AttributeTargets Targets;\r
- bool AllowMultiple;\r
- bool Inherited;\r
-\r
- bool UsageAttr = false;\r
- \r
- MethodImplOptions ImplOptions;\r
- UnmanagedType UnmanagedType;\r
- CustomAttributeBuilder cb;\r
- \r
- // non-null if named args present after Resolve () is called\r
- PropertyInfo [] prop_info_arr;\r
- FieldInfo [] field_info_arr;\r
- object [] field_values_arr;\r
- object [] prop_values_arr;\r
- \r
- object [] pos_values;\r
-\r
- public Attribute (string name, ArrayList args, Location loc)\r
- {\r
- Name = name;\r
- Arguments = args;\r
- Location = loc;\r
- }\r
-\r
- void Error_InvalidNamedArgument (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
- static void Error_AttributeArgumentNotValid (Location loc)\r
- {\r
- Report.Error (182, loc,\r
- "An attribute argument must be a constant expression, typeof " +\r
- "expression or array creation expression");\r
- }\r
-\r
- static void Error_AttributeConstructorMismatch (Location loc)\r
- {\r
- Report.Error (-6, loc,\r
- "Could not find a constructor for this argument list.");\r
- }\r
-\r
- static void Error_TypeParameterInAttribute (Location loc)\r
- {\r
- Report.Error (\r
- -202, loc, "Can not use a type parameter in an attribute");\r
- }\r
-\r
- /// <summary>\r
- /// Tries to resolve the type of the attribute. Flags an error if it can't.\r
- /// </summary>\r
- private Type CheckAttributeType (EmitContext ec) {\r
- TypeExpr t1 = RootContext.LookupType (ec.DeclSpace, Name, true, Location);\r
- // FIXME: Shouldn't do this for quoted attributes: [@A]\r
- TypeExpr t2 = RootContext.LookupType (ec.DeclSpace, Name + "Attribute", true, Location);\r
-\r
- String err0616 = null;\r
- if (t1 != null && ! t1.IsAttribute) {\r
- t1 = null;\r
- err0616 = "'" + Name + "': is not an attribute class";\r
- }\r
- if (t2 != null && ! t2.IsAttribute) {\r
- t2 = null;\r
- err0616 = (err0616 != null) \r
- ? "Neither '" + Name + "' nor '" + Name + "Attribute' is an attribute class"\r
- : "'" + Name + "Attribute': is not an attribute class";\r
- }\r
-\r
- if (t1 != null && t2 != null) {\r
- Report.Error(1614, Location, "'" + Name + "': is ambiguous; " \r
- + " use either '@" + Name + "' or '" + Name + "Attribute'");\r
- return null;\r
- }\r
-\r
- if (t1 != null)\r
- return t1.ResolveType (ec);\r
- if (t2 != null)\r
- return t2.ResolveType (ec);\r
- if (err0616 != null) {\r
- Report.Error (616, Location, err0616);\r
- return null;\r
- }\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
- public Type ResolveType (EmitContext ec)\r
- {\r
- Type = CheckAttributeType (ec);\r
- return Type;\r
- }\r
-\r
- /// <summary>\r
- /// Validates the guid string\r
- /// </summary>\r
- bool ValidateGuid (string guid)\r
- {\r
- try {\r
- new Guid (guid);\r
- return true;\r
- } catch {\r
- Report.Error (647, Location, "Format of GUID is invalid: " + guid);\r
- return false;\r
- }\r
- }\r
-\r
- //\r
- // Given an expression, if the expression is a valid attribute-argument-expression\r
- // returns an object that can be used to encode it, or null on failure.\r
- //\r
- public static bool GetAttributeArgumentExpression (Expression e, Location loc, out object result)\r
- {\r
- if (e is Constant) {\r
- result = ((Constant) e).GetValue ();\r
- return true;\r
- } else if (e is TypeOf) {\r
- result = ((TypeOf) e).TypeArg;\r
- return true;\r
- } else if (e is ArrayCreation){\r
- result = ((ArrayCreation) e).EncodeAsAttribute ();\r
- if (result != null)\r
- return true;\r
- } else if (e is EmptyCast) {\r
- result = e;\r
- if (((EmptyCast) e).Child is Constant) {\r
- result = ((Constant) ((EmptyCast)e).Child).GetValue();\r
- }\r
- return true;\r
- }\r
-\r
- result = null;\r
- Error_AttributeArgumentNotValid (loc);\r
- return false;\r
- }\r
- \r
- public CustomAttributeBuilder Resolve (EmitContext ec)\r
- {\r
- if (Type == null)\r
- Type = CheckAttributeType (ec);\r
- if (Type == null)\r
- return null;\r
-\r
- bool MethodImplAttr = false;\r
- bool MarshalAsAttr = false;\r
- bool GuidAttr = false;\r
- UsageAttr = false;\r
-\r
- bool DoCompares = true;\r
-\r
- //\r
- // If we are a certain special attribute, we\r
- // set the information accordingly\r
- //\r
- \r
- if (Type == TypeManager.attribute_usage_type)\r
- UsageAttr = true;\r
- else if (Type == TypeManager.methodimpl_attr_type)\r
- MethodImplAttr = true;\r
- else if (Type == TypeManager.marshal_as_attr_type)\r
- MarshalAsAttr = true;\r
- else if (Type == TypeManager.guid_attr_type)\r
- GuidAttr = true;\r
- else\r
- DoCompares = false;\r
-\r
- // Now we extract the positional and named arguments\r
- \r
- ArrayList pos_args = new ArrayList ();\r
- ArrayList named_args = new ArrayList ();\r
- int pos_arg_count = 0;\r
- \r
- if (Arguments != null) {\r
- pos_args = (ArrayList) Arguments [0];\r
- if (pos_args != null)\r
- pos_arg_count = pos_args.Count;\r
- if (Arguments.Count > 1)\r
- named_args = (ArrayList) Arguments [1];\r
- }\r
-\r
- pos_values = new object [pos_arg_count];\r
-\r
- //\r
- // First process positional arguments \r
- //\r
-\r
- int i;\r
- for (i = 0; i < pos_arg_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
-\r
- object val;\r
- if (!GetAttributeArgumentExpression (e, Location, out val))\r
- return null;\r
- \r
- pos_values [i] = val;\r
- if (DoCompares){\r
- if (UsageAttr)\r
- this.Targets = (AttributeTargets) pos_values [0];\r
- else if (MethodImplAttr)\r
- this.ImplOptions = (MethodImplOptions) pos_values [0];\r
- else if (GuidAttr){\r
- //\r
- // we will later check the validity of the type\r
- //\r
- if (pos_values [0] is string){\r
- if (!ValidateGuid ((string) pos_values [0]))\r
- return null;\r
- }\r
- \r
- } else if (MarshalAsAttr)\r
- this.UnmanagedType =\r
- (System.Runtime.InteropServices.UnmanagedType) pos_values [0];\r
- }\r
- }\r
-\r
- //\r
- // Now process named arguments\r
- //\r
-\r
- ArrayList field_infos = null;\r
- ArrayList prop_infos = null;\r
- ArrayList field_values = null;\r
- ArrayList prop_values = null;\r
-\r
- Hashtable seen_names = new Hashtable();\r
-\r
- if (named_args.Count > 0) {\r
- field_infos = new ArrayList ();\r
- prop_infos = new ArrayList ();\r
- field_values = new ArrayList ();\r
- prop_values = new ArrayList ();\r
- }\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 (seen_names.Contains(member_name)) {\r
- Report.Error(643, Location, "'" + member_name + "' duplicate named attribute argument");\r
- return null;\r
- }\r
- seen_names.Add(member_name, 1);\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
- Error_InvalidNamedArgument (member_name);\r
- return null;\r
- }\r
-\r
- e = a.Expr;\r
- if (e is TypeParameterExpr){\r
- Error_TypeParameterInAttribute (Location);\r
- return null;\r
- }\r
- \r
- if (member is PropertyExpr) {\r
- PropertyExpr pe = (PropertyExpr) member;\r
- PropertyInfo pi = pe.PropertyInfo;\r
-\r
- if (!pi.CanWrite) {\r
- Error_InvalidNamedArgument (member_name);\r
- return null;\r
- }\r
-\r
- if (e is Constant) {\r
- Constant c;\r
-\r
- if (e.Type != pi.PropertyType){\r
- c = Const.ChangeType (Location, (Constant) e, pi.PropertyType);\r
- if (c == null)\r
- return null;\r
- } else\r
- c = (Constant) e;\r
-\r
- object o = c.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 if (e is TypeOf) {\r
- prop_values.Add (((TypeOf) e).TypeArg);\r
- } else if (e is ArrayCreation) {\r
- prop_values.Add (((ArrayCreation) e).EncodeAsAttribute());\r
- } else {\r
- Error_AttributeArgumentNotValid (Location);\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
- Error_InvalidNamedArgument (member_name);\r
- return null;\r
- }\r
-\r
- //\r
- // Handle charset here, and set the TypeAttributes\r
- \r
- if (e is Constant){\r
- Constant c = (Constant) e;;\r
-\r
- if (c.Type != fi.FieldType){\r
- c = Const.ChangeType (Location, (Constant) e, fi.FieldType);\r
- if (c == null)\r
- return null;\r
- }\r
-\r
- object value = c.GetValue ();\r
- field_values.Add (value);\r
- } else if (e is TypeOf) {\r
- field_values.Add (((TypeOf) e).TypeArg);\r
- } else {\r
- Error_AttributeArgumentNotValid (Location);\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 | BindingFlags.DeclaredOnly,\r
- Location);\r
-\r
- if (mg == null) {\r
- Error_AttributeConstructorMismatch (Location);\r
- return null;\r
- }\r
-\r
- MethodBase constructor = Invocation.OverloadResolve (\r
- ec, (MethodGroupExpr) mg, pos_args, false, Location);\r
-\r
- if (constructor == null) {\r
- Error_AttributeConstructorMismatch (Location);\r
- return null;\r
- }\r
-\r
- //\r
- // Now we perform some checks on the positional args as they\r
- // cannot be null for a constructor which expects a parameter\r
- // of type object\r
- //\r
-\r
- ParameterData pd = Invocation.GetParameterData (constructor);\r
-\r
- int group_in_params_array = Int32.MaxValue;\r
- int pc = pd.Count;\r
- if (pc > 0 && pd.ParameterModifier (pc-1) == Parameter.Modifier.PARAMS)\r
- group_in_params_array = pc-1;\r
- \r
- for (int j = 0; j < pos_arg_count; ++j) {\r
- Argument a = (Argument) pos_args [j];\r
- \r
- if (a.Expr is NullLiteral && pd.ParameterType (j) == TypeManager.object_type) {\r
- Error_AttributeArgumentNotValid (Location);\r
- return null;\r
- }\r
-\r
- if (j < group_in_params_array)\r
- continue;\r
- \r
- if (j == group_in_params_array){\r
- object v = pos_values [j];\r
- int count = pos_arg_count - j;\r
-\r
- object [] array = new object [count];\r
- pos_values [j] = array;\r
- array [0] = v;\r
- } else {\r
- object [] array = (object []) pos_values [group_in_params_array];\r
-\r
- array [j - group_in_params_array] = pos_values [j];\r
- }\r
- }\r
-\r
- //\r
- // Adjust the size of the pos_values if it had params\r
- //\r
- if (group_in_params_array != Int32.MaxValue){\r
- int argc = group_in_params_array+1;\r
- object [] new_pos_values = new object [argc];\r
-\r
- for (int p = 0; p < argc; p++)\r
- new_pos_values [p] = pos_values [p];\r
- pos_values = new_pos_values;\r
- }\r
-\r
- try {\r
- if (named_args.Count > 0) {\r
- prop_info_arr = new PropertyInfo [prop_infos.Count];\r
- field_info_arr = new FieldInfo [field_infos.Count];\r
- field_values_arr = new object [field_values.Count];\r
- 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
- cb = new CustomAttributeBuilder (\r
- (ConstructorInfo) constructor, pos_values,\r
- prop_info_arr, prop_values_arr,\r
- field_info_arr, field_values_arr);\r
- }\r
- else\r
- cb = new CustomAttributeBuilder (\r
- (ConstructorInfo) constructor, pos_values);\r
- } catch (NullReferenceException) {\r
- // \r
- // Don't know what to do here\r
- //\r
- Report.Warning (\r
- -101, Location, "NullReferenceException while trying to create attribute." +\r
- "Something's wrong!");\r
- } catch (Exception e) {\r
- //\r
- // Sample:\r
- // using System.ComponentModel;\r
- // [DefaultValue (CollectionChangeAction.Add)]\r
- // class X { static void Main () {} }\r
- //\r
- Report.Warning (\r
- -23, Location,\r
- "The compiler can not encode this attribute in .NET due to\n" +\r
- "\ta bug in the .NET runtime. Try the Mono runtime.\nThe error was: " + e.Message);\r
- }\r
- \r
- return cb;\r
- }\r
-\r
- /// <summary>\r
- /// Get a string containing a list of valid targets for the attribute 'attr'\r
- /// </summary>\r
- static string GetValidTargets (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
- \r
- System.Attribute [] attrs = null;\r
- \r
- try {\r
- attrs = System.Attribute.GetCustomAttributes (attr.Type);\r
- \r
- } catch {\r
- Report.Error (-20, attr.Location, "Cannot find attribute type " + attr.Name +\r
- " (maybe you forgot to set the usage using the" +\r
- " AttributeUsage attribute ?).");\r
- return null;\r
- }\r
- \r
- foreach (System.Attribute tmp in attrs)\r
- if (tmp is AttributeUsageAttribute) {\r
- targets = ((AttributeUsageAttribute) tmp).ValidOn;\r
- break;\r
- }\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 Error_AttributeNotValidForElement (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 " + GetValidTargets (a) + "declarations only.");\r
- }\r
-\r
- /// <summary>\r
- /// Ensure that Attribute 'a' is being applied to the right language element (target)\r
- /// </summary>\r
- public static bool CheckAttributeTarget (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 = null;\r
- \r
- try {\r
- attrs = System.Attribute.GetCustomAttributes (a.Type);\r
-\r
- } catch {\r
- Report.Error (-20, a.Location, "Cannot find attribute type " + a.Name +\r
- " (maybe you forgot to set the usage using the" +\r
- " AttributeUsage attribute ?).");\r
- return false;\r
- }\r
- \r
- foreach (System.Attribute tmp in attrs)\r
- if (tmp is AttributeUsageAttribute) { \r
- targets = ((AttributeUsageAttribute) tmp).ValidOn;\r
- break;\r
- }\r
- } else\r
- targets = attr.Targets;\r
-\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 || element is FieldBuilder) {\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
- element is Accessor) {\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
- (targets & AttributeTargets.ReturnValue) != 0)\r
- return true;\r
- else\r
- return false;\r
- } else if (element is Property || element is Indexer ||\r
- element is Accessor) {\r
- if ((targets & AttributeTargets.Property) != 0)\r
- return true;\r
- else\r
- return false;\r
- } else if (element is AssemblyClass){\r
- if ((targets & AttributeTargets.Assembly) != 0)\r
- return true;\r
- else\r
- return false;\r
- } else if (element is ModuleClass){\r
- if ((targets & AttributeTargets.Module) != 0)\r
- return true;\r
- else\r
- return false;\r
- }\r
-\r
- return false;\r
- }\r
-\r
- //\r
- // This method should be invoked to pull the IndexerName attribute from an\r
- // Indexer if it exists.\r
- //\r
- public static string ScanForIndexerName (EmitContext ec, Attributes opt_attrs)\r
- {\r
- if (opt_attrs == null)\r
- return null;\r
- if (opt_attrs.AttributeSections == null)\r
- return null;\r
-\r
- foreach (AttributeSection asec in opt_attrs.AttributeSections) {\r
- if (asec.Attributes == null)\r
- continue;\r
-\r
- foreach (Attribute a in asec.Attributes){\r
- if (a.ResolveType (ec) == null)\r
- return null;\r
-\r
- if (a.Type != TypeManager.indexer_name_type)\r
- continue;\r
-\r
- //\r
- // So we have found an IndexerName, pull the data out.\r
- //\r
- if (a.Arguments == null || a.Arguments [0] == null){\r
- Error_AttributeConstructorMismatch (a.Location);\r
- return null;\r
- }\r
- ArrayList pos_args = (ArrayList) a.Arguments [0];\r
- if (pos_args.Count == 0){\r
- Error_AttributeConstructorMismatch (a.Location);\r
- return null;\r
- }\r
- \r
- Argument arg = (Argument) pos_args [0];\r
- if (!arg.Resolve (ec, a.Location))\r
- return null;\r
- \r
- Expression e = arg.Expr;\r
- if (!(e is StringConstant)){\r
- Error_AttributeConstructorMismatch (a.Location);\r
- return null;\r
- }\r
-\r
- //\r
- // Remove the attribute from the list\r
- //\r
- asec.Attributes.Remove (a);\r
-\r
- return (((StringConstant) e).Value);\r
- }\r
- }\r
- return null;\r
- }\r
-\r
- //\r
- // This pulls the condition name out of a Conditional attribute\r
- //\r
- public string Conditional_GetConditionName ()\r
- {\r
- //\r
- // So we have a Conditional, pull the data out.\r
- //\r
- if (Arguments == null || Arguments [0] == null){\r
- Error_AttributeConstructorMismatch (Location);\r
- return null;\r
- }\r
-\r
- ArrayList pos_args = (ArrayList) Arguments [0];\r
- if (pos_args.Count != 1){\r
- Error_AttributeConstructorMismatch (Location);\r
- return null;\r
- }\r
-\r
- Argument arg = (Argument) pos_args [0]; \r
- if (!(arg.Expr is StringConstant)){\r
- Error_AttributeConstructorMismatch (Location);\r
- return null;\r
- }\r
-\r
- return ((StringConstant) arg.Expr).Value;\r
- }\r
-\r
- //\r
- // This pulls the obsolete message and error flag out of an Obsolete attribute\r
- //\r
- public string Obsolete_GetObsoleteMessage (out bool is_error)\r
- {\r
- is_error = false;\r
- //\r
- // So we have an Obsolete, pull the data out.\r
- //\r
- if (Arguments == null || Arguments [0] == null)\r
- return "";\r
-\r
- ArrayList pos_args = (ArrayList) Arguments [0];\r
- if (pos_args.Count == 0)\r
- return "";\r
- else if (pos_args.Count > 2){\r
- Error_AttributeConstructorMismatch (Location);\r
- return null;\r
- }\r
-\r
- Argument arg = (Argument) pos_args [0]; \r
- if (!(arg.Expr is StringConstant)){\r
- Error_AttributeConstructorMismatch (Location);\r
- return null;\r
- }\r
-\r
- if (pos_args.Count == 2){\r
- Argument arg2 = (Argument) pos_args [1];\r
- if (!(arg2.Expr is BoolConstant)){\r
- Error_AttributeConstructorMismatch (Location);\r
- return null;\r
- }\r
- is_error = ((BoolConstant) arg2.Expr).Value;\r
- }\r
-\r
- return ((StringConstant) arg.Expr).Value;\r
- }\r
-\r
- /// <summary>\r
- /// Returns value of CLSCompliantAttribute contructor parameter but because the method can be called\r
- /// before ApplyAttribute. We need to resolve the arguments.\r
- /// This situation occurs when class deps is differs from Emit order. \r
- /// </summary>\r
- public bool GetClsCompliantAttributeValue (DeclSpace ds)\r
- {\r
- if (pos_values == null) {\r
- EmitContext ec = new EmitContext (ds, ds, Location, null, null, 0, false);\r
-\r
- // TODO: It is not neccessary to call whole Resolve (ApplyAttribute does it now) we need only ctor args.\r
- // But because a lot of attribute class code must be rewritten will be better to wait...\r
- Resolve (ec);\r
- }\r
-\r
- // Some error occurred\r
- if (pos_values [0] == null)\r
- return false;\r
-\r
- return (bool)pos_values [0];\r
- }\r
-\r
- static object GetFieldValue (Attribute a, string name)\r
- {\r
- int i;\r
- if (a.field_info_arr == null)\r
- return null;\r
- i = 0;\r
- foreach (FieldInfo fi in a.field_info_arr) {\r
- if (fi.Name == name)\r
- return a.field_values_arr [i];\r
- i++;\r
- }\r
- return null;\r
- }\r
-\r
- static UnmanagedMarshal GetMarshal (Attribute a)\r
- {\r
- object o = GetFieldValue (a, "ArraySubType");\r
- UnmanagedType array_sub_type = o == null ? UnmanagedType.I4 : (UnmanagedType) o;\r
- switch (a.UnmanagedType) {\r
- case UnmanagedType.CustomMarshaler:\r
- MethodInfo define_custom = typeof (UnmanagedMarshal).GetMethod ("DefineCustom",\r
- BindingFlags.Static | BindingFlags.Public);\r
- if (define_custom == null)\r
- return null;\r
-\r
- object [] args = new object [4];\r
- args [0] = GetFieldValue (a, "MarshalTypeRef");\r
- args [1] = GetFieldValue (a, "MarshalCookie");\r
- args [2] = GetFieldValue (a, "MarshalType");\r
- args [3] = Guid.Empty;\r
- return (UnmanagedMarshal) define_custom.Invoke (null, args);\r
-\r
- case UnmanagedType.LPArray: \r
- return UnmanagedMarshal.DefineLPArray (array_sub_type);\r
-\r
- case UnmanagedType.SafeArray:\r
- return UnmanagedMarshal.DefineSafeArray (array_sub_type);\r
-\r
- case UnmanagedType.ByValArray:\r
- return UnmanagedMarshal.DefineByValArray ((int) GetFieldValue (a, "SizeConst"));\r
-\r
- case UnmanagedType.ByValTStr:\r
- return UnmanagedMarshal.DefineByValTStr ((int) GetFieldValue (a, "SizeConst"));\r
-\r
- default:\r
- return UnmanagedMarshal.DefineUnmanagedMarshal (a.UnmanagedType);\r
- }\r
- }\r
-\r
- /// <summary>\r
- /// Applies the attributes specified on target 'kind' to the `builder'.\r
- /// </summary>\r
- public static void ApplyAttributes (EmitContext ec, object builder, object kind,\r
- Attributes opt_attrs)\r
- {\r
- Type attr_type = null;\r
- \r
- if (opt_attrs == null)\r
- return;\r
- if (opt_attrs.AttributeSections == null)\r
- return;\r
-\r
- ArrayList emitted_attrs = new ArrayList ();\r
- ArrayList emitted_targets = new ArrayList ();\r
-\r
- foreach (AttributeSection asec in opt_attrs.AttributeSections) {\r
- string attr_target = asec.Target;\r
- \r
- if (asec.Attributes == null)\r
- continue;\r
-\r
- if (attr_target == "return" && !(builder is ParameterBuilder))\r
- continue;\r
- \r
- foreach (Attribute a in asec.Attributes) {\r
- Location loc = a.Location;\r
- CustomAttributeBuilder cb = a.Resolve (ec);\r
- attr_type = a.Type;\r
-\r
- if (cb == null) \r
- continue;\r
- \r
- if (!(kind is TypeContainer))\r
- if (!CheckAttributeTarget (a, kind)) {\r
- Error_AttributeNotValidForElement (a, loc);\r
- return;\r
- }\r
-\r
- //\r
- // Perform the check for duplicate attributes\r
- //\r
- if (emitted_attrs.Contains (attr_type) &&\r
- emitted_targets.Contains (attr_target) &&\r
- !TypeManager.AreMultipleAllowed (attr_type)) {\r
- Report.Error (579, loc, "Duplicate '" + a.Name + "' attribute");\r
- return;\r
- }\r
-\r
- if (kind is IAttributeSupport) {\r
- if (attr_type == TypeManager.methodimpl_attr_type && a.ImplOptions == MethodImplOptions.InternalCall) {\r
- ((MethodBuilder) builder).SetImplementationFlags (MethodImplAttributes.InternalCall | MethodImplAttributes.Runtime);\r
- } \r
- else {\r
- IAttributeSupport attributeSupport = kind as IAttributeSupport;\r
- attributeSupport.SetCustomAttribute (cb);\r
- }\r
- }\r
- else if (kind is Method || kind is Operator || kind is Accessor) {\r
- if (attr_type == TypeManager.methodimpl_attr_type) {\r
- if (a.ImplOptions == MethodImplOptions.InternalCall)\r
- ((MethodBuilder) builder).\r
- SetImplementationFlags (\r
- MethodImplAttributes.InternalCall |\r
- MethodImplAttributes.Runtime);\r
- else\r
- ((MethodBuilder) builder).SetCustomAttribute (cb);\r
- } else if (attr_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
- if (attr_type == TypeManager.marshal_as_attr_type) {\r
- UnmanagedMarshal marshal = GetMarshal (a);\r
- if (marshal == null) {\r
- Report.Warning (-24, loc,\r
- "The Microsoft Runtime cannot set this marshal info. " +\r
- "Please use the Mono runtime instead.");\r
- } else {\r
- ((FieldBuilder) builder).SetMarshal (marshal);\r
- }\r
- } else { \r
- ((FieldBuilder) builder).SetCustomAttribute (cb);\r
- }\r
- } else if (kind is Property || kind is Indexer) {\r
-\r
- if (builder is PropertyBuilder) \r
- ((PropertyBuilder) builder).SetCustomAttribute (cb);\r
- //\r
- // This is for the case we are setting attributes on\r
- // the get and set accessors\r
- //\r
- else if (builder is MethodBuilder)\r
- ((MethodBuilder) builder).SetCustomAttribute (cb);\r
- } else if (kind is Event) {\r
- ((MyEventBuilder) builder).SetCustomAttribute (cb);\r
- } else if (kind is ParameterBuilder) {\r
-\r
- if (attr_type == TypeManager.marshal_as_attr_type) {\r
- UnmanagedMarshal marshal = GetMarshal (a);\r
- if (marshal == null) {\r
- Report.Warning (-24, loc,\r
- "The Microsoft Runtime cannot set this marshal info. " +\r
- "Please use the Mono runtime instead.");\r
- } else {\r
- ((ParameterBuilder) builder).SetMarshal (marshal);\r
- }\r
- } else { \r
-\r
- try {\r
- ((ParameterBuilder) builder).SetCustomAttribute (cb);\r
- } catch (System.ArgumentException) {\r
- Report.Warning (-24, loc,\r
- "The Microsoft Runtime cannot set attributes \n" +\r
- "on the return type of a method. Please use the \n" +\r
- "Mono runtime instead.");\r
- }\r
-\r
- }\r
- } else if (kind is Enum) {\r
- ((TypeBuilder) builder).SetCustomAttribute (cb); \r
-\r
- } else if (kind is TypeContainer) {\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
- TypeManager.RegisterAttributeAllowMultiple (tc.TypeBuilder,\r
- tc.AllowMultiple);\r
- \r
- } else if (attr_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 (!CheckAttributeTarget (a, kind)) {\r
- Error_AttributeNotValidForElement (a, loc);\r
- return;\r
- }\r
- }\r
-\r
- try {\r
- ((TypeBuilder) builder).SetCustomAttribute (cb);\r
- } catch (System.ArgumentException) {\r
- Report.Warning (\r
- -21, loc,\r
- "The CharSet named property on StructLayout\n"+\r
- "\tdoes not work correctly on Microsoft.NET\n"+\r
- "\tYou might want to remove the CharSet declaration\n"+\r
- "\tor compile using the Mono runtime instead of the\n"+\r
- "\tMicrosoft .NET runtime");\r
- }\r
- } else if (kind is Delegate){\r
- if (!CheckAttributeTarget (a, kind)) {\r
- Error_AttributeNotValidForElement (a, loc);\r
- return;\r
- }\r
- try {\r
- ((TypeBuilder) builder).SetCustomAttribute (cb);\r
- } catch (System.ArgumentException) {\r
- Report.Warning (\r
- -21, loc,\r
- "The CharSet named property on StructLayout\n"+\r
- "\tdoes not work correctly on Microsoft.NET\n"+\r
- "\tYou might want to remove the CharSet declaration\n"+\r
- "\tor compile using the Mono runtime instead of the\n"+\r
- "\tMicrosoft .NET runtime");\r
- }\r
- } else if (kind is Interface) {\r
- Interface iface = (Interface) kind;\r
-\r
- if ((attr_type == TypeManager.default_member_type) &&\r
- (iface.Indexers != null)) {\r
- Report.Error (\r
- 646, loc,\r
- "Cannot specify the DefaultMember attribute on" +\r
- " a type containing an indexer");\r
- return;\r
- }\r
-\r
- if (!CheckAttributeTarget (a, kind)) {\r
- Error_AttributeNotValidForElement (a, loc);\r
- return;\r
- }\r
-\r
- ((TypeBuilder) builder).SetCustomAttribute (cb);\r
- } else if (kind is AssemblyBuilder){\r
- ((AssemblyBuilder) builder).SetCustomAttribute (cb);\r
- } else if (kind is ModuleBuilder) {\r
- ((ModuleBuilder) builder).SetCustomAttribute (cb);\r
- } else if (kind is FieldBuilder) {\r
- if (attr_type == TypeManager.marshal_as_attr_type) {\r
- UnmanagedMarshal marshal = GetMarshal (a);\r
- if (marshal == null) {\r
- Report.Warning (-24, loc,\r
- "The Microsoft Runtime cannot set this marshal info. " +\r
- "Please use the Mono runtime instead.");\r
- } else {\r
- ((ParameterBuilder) builder).SetMarshal (marshal);\r
- }\r
- } else { \r
- ((FieldBuilder) builder).SetCustomAttribute (cb);\r
- }\r
- } else\r
- throw new Exception ("Unknown kind: " + kind);\r
-\r
- //\r
- // Once an attribute type has been emitted once we\r
- // keep track of the info to prevent multiple occurences\r
- // for attributes which do not explicitly allow it\r
- //\r
- if (!emitted_attrs.Contains (attr_type))\r
- emitted_attrs.Add (attr_type);\r
-\r
- //\r
- // We keep of this target-wise and so emitted targets\r
- // are tracked too\r
- //\r
- if (!emitted_targets.Contains (attr_target))\r
- emitted_targets.Add (attr_target);\r
- }\r
- }\r
-\r
- // Here we are testing attribute arguments for array usage (error 3016)\r
- DeclSpace ds = kind as DeclSpace;\r
- if ((ds != null && ds.IsClsCompliaceRequired (ds)) ||\r
- (kind is AssemblyClass && CodeGen.Assembly.IsClsCompliant)) {\r
-\r
- foreach (AttributeSection asec in opt_attrs.AttributeSections) {\r
- foreach (Attribute a in asec.Attributes) {\r
- if (a.Arguments == null)\r
- continue;\r
-\r
- ArrayList pos_args = (ArrayList) a.Arguments [0];\r
-\r
- if (pos_args != null) {\r
- foreach (Argument arg in pos_args) { \r
- // Type is undefined (was error 246)\r
- if (arg.Type == null)\r
- return;\r
-\r
- if (arg.Type.IsArray) {\r
- Report.Error_T (3016, a.Location);\r
- return;\r
- }\r
- }\r
- }\r
-\r
- if (a.Arguments.Count < 2)\r
- continue;\r
-\r
- ArrayList named_args = (ArrayList) a.Arguments [1];\r
-\r
- foreach (DictionaryEntry de in named_args) {\r
- Argument arg = (Argument) de.Value;\r
-\r
- // Type is undefined (was error 246)\r
- if (arg.Type == null)\r
- return;\r
-\r
- if (arg.Type.IsArray) \r
- {\r
- Report.Error_T (3016, a.Location);\r
- return;\r
- }\r
- }\r
- }\r
- }\r
- }\r
- }\r
-\r
- public object GetValue (EmitContext ec, Constant c, Type target)\r
- {\r
- if (Convert.ImplicitConversionExists (ec, c, target))\r
- return c.GetValue ();\r
-\r
- Convert.Error_CannotImplicitConversion (Location, c.Type, target);\r
- return null;\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
- Type = CheckAttributeType (ec);\r
- if (Type == null)\r
- return null;\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
- Error_AttributeArgumentNotValid (Location);\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
-#if FIXME\r
- bool exact_spelling = false;\r
-#endif\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
- Error_InvalidNamedArgument (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
- Error_InvalidNamedArgument (member_name);\r
- return null;\r
- }\r
-\r
- if (a.Expr is Constant) {\r
- Constant c = (Constant) a.Expr;\r
-\r
- try {\r
- if (member_name == "CallingConvention"){\r
- object val = GetValue (ec, c, typeof (CallingConvention));\r
- if (val == null)\r
- return null;\r
- cc = (CallingConvention) val;\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
-#if FIXME\r
- else if (member_name == "ExactSpelling")\r
- exact_spelling = (bool) c.GetValue ();\r
-#endif\r
- else if (member_name == "PreserveSig")\r
- preserve_sig = (bool) c.GetValue ();\r
- } catch (InvalidCastException){\r
- Error_InvalidNamedArgument (member_name);\r
- Error_AttributeArgumentNotValid (Location);\r
- }\r
- } else { \r
- Error_AttributeArgumentNotValid (Location);\r
- return null;\r
- }\r
- \r
- }\r
- }\r
-\r
- if (entry_point == null)\r
- entry_point = name;\r
- if (set_last_err)\r
- charset = (CharSet)((int)charset | 0x40);\r
- \r
- MethodBuilder mb = builder.DefinePInvokeMethod (\r
- name, dll_name, entry_point, 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
- private Expression GetValue () \r
- {\r
- if ((Arguments == null) || (Arguments.Count < 1))\r
- return null;\r
- ArrayList al = (ArrayList) Arguments [0];\r
- if ((al == null) || (al.Count < 1))\r
- return null;\r
- Argument arg = (Argument) al [0];\r
- if ((arg == null) || (arg.Expr == null))\r
- return null;\r
- return arg.Expr;\r
- }\r
-\r
- public string GetString () \r
- {\r
- Expression e = GetValue ();\r
- if (e is StringLiteral)\r
- return (e as StringLiteral).Value;\r
- return null;\r
- }\r
-\r
- public bool GetBoolean () \r
- {\r
- Expression e = GetValue ();\r
- if (e is BoolLiteral)\r
- return (e as BoolLiteral).Value;\r
- return false;\r
- }\r
- }\r
- \r
- public class AttributeSection {\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
-\r
- public Attributes (AttributeSection a)\r
- {\r
- AttributeSections = new ArrayList ();\r
- AttributeSections.Add (a);\r
-\r
- }\r
-\r
- public void AddAttributeSection (AttributeSection a)\r
- {\r
- if (a != null && !AttributeSections.Contains (a))\r
- AttributeSections.Add (a);\r
- }\r
-\r
- public bool Contains (Type t)\r
- {\r
- foreach (AttributeSection attr_section in AttributeSections){\r
- foreach (Attribute a in attr_section.Attributes){\r
- if (a.Type == t)\r
- return true;\r
- }\r
- }\r
- \r
- return false;\r
- }\r
-\r
- public Attribute GetClsCompliantAttribute (DeclSpace ds)\r
- {\r
- foreach (AttributeSection attr_section in AttributeSections) {\r
- foreach (Attribute a in attr_section.Attributes) {\r
- // Unfortunately, we have also attributes that has not been resolved yet.\r
- // We need to simulate part of ApplyAttribute method.\r
- if (a.Type == null) {\r
- TypeExpr attr_type = RootContext.LookupType (ds, GetAttributeFullName (a.Name), true, a.Location);\r
- if (attr_type != null && attr_type.Type == TypeManager.cls_compliant_attribute_type)\r
- return a;\r
-\r
- continue;\r
- }\r
-\r
- if (a.Type == TypeManager.cls_compliant_attribute_type)\r
- return a;\r
- }\r
- }\r
- return null;\r
- }\r
-\r
- public static string GetAttributeFullName (string name)\r
- {\r
- if (name.EndsWith ("Attribute"))\r
- return name;\r
- return name + "Attribute";\r
- }\r
- }\r
-\r
- public interface IAttributeSupport\r
- {\r
- void SetCustomAttribute (CustomAttributeBuilder customBuilder);\r
- }\r
-\r
- /// <summary>\r
- /// Helper class for attribute verification routine.\r
- /// </summary>\r
- sealed class AttributeTester\r
- {\r
- static PtrHashtable analyzed_types = new PtrHashtable ();\r
-\r
- private AttributeTester ()\r
- {\r
- }\r
-\r
- /// <summary>\r
- /// Returns true if parameters of two compared methods are CLS-Compliant.\r
- /// It tests differing only in ref or out, or in array rank.\r
- /// </summary>\r
- public static bool AreOverloadedMethodParamsClsCompliant (Type[] types_a, Type[] types_b) \r
- {\r
- if (types_a == null || types_b == null)\r
- return true;\r
-\r
- if (types_a.Length != types_b.Length)\r
- return true;\r
-\r
- for (int i = 0; i < types_b.Length; ++i) {\r
- Type aType = types_a [i];\r
- Type bType = types_b [i];\r
-\r
- if (aType.IsArray && bType.IsArray && aType.GetArrayRank () != bType.GetArrayRank () && aType.GetElementType () == bType.GetElementType ()) {\r
- return false;\r
- }\r
-\r
- Type aBaseType = aType;\r
- bool is_either_ref_or_out = false;\r
-\r
- if (aType.IsByRef || aType.IsPointer) {\r
- aBaseType = aType.GetElementType ();\r
- is_either_ref_or_out = true;\r
- }\r
-\r
- Type bBaseType = bType;\r
- if (bType.IsByRef || bType.IsPointer) \r
- {\r
- bBaseType = bType.GetElementType ();\r
- is_either_ref_or_out = !is_either_ref_or_out;\r
- }\r
-\r
- if (aBaseType != bBaseType)\r
- continue;\r
-\r
- if (is_either_ref_or_out)\r
- return false;\r
- }\r
- return true;\r
- }\r
-\r
- /// <summary>\r
- /// Goes through all parameters and test if they are CLS-Compliant.\r
- /// </summary>\r
- public static bool AreParametersCompliant (Parameter[] fixedParameters, Location loc)\r
- {\r
- if (fixedParameters == null)\r
- return true;\r
-\r
- foreach (Parameter arg in fixedParameters) {\r
- if (!AttributeTester.IsClsCompliant (arg.ParameterType)) {\r
- Report.Error_T (3001, loc, arg.GetSignatureForError ());\r
- return false;\r
- }\r
- }\r
- return true;\r
- }\r
-\r
-\r
- /// <summary>\r
- /// This method tests the CLS compliance of external types. It doesn't test type visibility.\r
- /// </summary>\r
- public static bool IsClsCompliant (Type type) \r
- {\r
- if (type == null)\r
- return true;\r
-\r
- object type_compliance = analyzed_types[type];\r
- if (type_compliance != null)\r
- return type_compliance == TRUE;\r
-\r
- if (type.IsPointer) {\r
- analyzed_types.Add (type, null);\r
- return false;\r
- }\r
-\r
- bool result;\r
- if (type.IsArray || type.IsByRef) {\r
- result = IsClsCompliant (TypeManager.GetElementType (type));\r
- } else {\r
- result = AnalyzeTypeCompliance (type);\r
- }\r
- analyzed_types.Add (type, result ? TRUE : FALSE);\r
- return result;\r
- } \r
-\r
- static object TRUE = new object ();\r
- static object FALSE = new object ();\r
-\r
- /// <summary>\r
- /// Non-hierarchical CLS Compliance analyzer\r
- /// </summary>\r
- public static bool IsComplianceRequired (MemberInfo mi, DeclSpace ds)\r
- {\r
- DeclSpace temp_ds = TypeManager.LookupDeclSpace (mi.DeclaringType);\r
-\r
- // Type is external, we can get attribute directly\r
- if (temp_ds == null) {\r
- object[] cls_attribute = mi.GetCustomAttributes (TypeManager.cls_compliant_attribute_type, false);\r
- return (cls_attribute.Length == 1 && ((CLSCompliantAttribute)cls_attribute[0]).IsCompliant);\r
- }\r
-\r
- string tmp_name;\r
- // Interface doesn't store full name\r
- if (temp_ds is Interface)\r
- tmp_name = mi.Name;\r
- else\r
- tmp_name = String.Concat (temp_ds.Name, ".", mi.Name);\r
-\r
- MemberCore mc = temp_ds.GetDefinition (tmp_name) as MemberCore;\r
- return mc.IsClsCompliaceRequired (ds);\r
- }\r
-\r
- public static void VerifyModulesClsCompliance ()\r
- {\r
- Module[] modules = TypeManager.Modules;\r
- if (modules == null)\r
- return;\r
-\r
- // The first module is generated assembly\r
- for (int i = 1; i < modules.Length; ++i) {\r
- Module module = modules [i];\r
- if (!IsClsCompliant (module)) {\r
- Report.Error_T (3013, module.Name);\r
- return;\r
- }\r
- }\r
- }\r
-\r
- static bool IsClsCompliant (ICustomAttributeProvider attribute_provider) \r
- {\r
- object[] CompliantAttribute = attribute_provider.GetCustomAttributes (TypeManager.cls_compliant_attribute_type, false);\r
- if (CompliantAttribute.Length == 0)\r
- return false;\r
-\r
- return ((CLSCompliantAttribute)CompliantAttribute[0]).IsCompliant;\r
- }\r
-\r
- static bool AnalyzeTypeCompliance (Type type)\r
- {\r
- DeclSpace ds = TypeManager.LookupDeclSpace (type);\r
- if (ds != null) {\r
- return ds.IsClsCompliaceRequired (ds.Parent);\r
- }\r
-\r
- if (type.IsGenericParameter)\r
- return false;\r
-\r
- object[] CompliantAttribute = type.GetCustomAttributes (TypeManager.cls_compliant_attribute_type, false);\r
- if (CompliantAttribute.Length == 0) \r
- return IsClsCompliant (type.Assembly);\r
-\r
- return ((CLSCompliantAttribute)CompliantAttribute[0]).IsCompliant;\r
- }\r
- }\r
-}\r
+//
+// attribute.cs: Attribute Handler
+//
+// Author: Ravi Pratap (ravi@ximian.com)
+// Marek Safar (marek.safar@seznam.cz)
+//
+// 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.Collections.Specialized;
+using System.Reflection;
+using System.Reflection.Emit;
+using System.Runtime.InteropServices;
+using System.Runtime.CompilerServices;
+using System.Security;
+using System.Security.Permissions;
+using System.Text;
+
+namespace Mono.CSharp {
+
+ /// <summary>
+ /// Base class for objects that can have Attributes applied to them.
+ /// </summary>
+ public abstract class Attributable {
+ /// <summary>
+ /// Attributes for this type
+ /// </summary>
+ Attributes attributes;
+
+ public Attributable (Attributes attrs)
+ {
+ attributes = attrs;
+ }
+
+ public Attributes OptAttributes
+ {
+ get {
+ return attributes;
+ }
+ set {
+ attributes = value;
+ }
+ }
+
+ /// <summary>
+ /// Use member-specific procedure to apply attribute @a in @cb to the entity being built in @builder
+ /// </summary>
+ public abstract void ApplyAttributeBuilder (Attribute a, CustomAttributeBuilder cb);
+
+ /// <summary>
+ /// Returns one AttributeTarget for this element.
+ /// </summary>
+ public abstract AttributeTargets AttributeTargets { get; }
+
+ public abstract bool IsClsCompliaceRequired (DeclSpace ds);
+
+ /// <summary>
+ /// Gets list of valid attribute targets for explicit target declaration.
+ /// The first array item is default target. Don't break this rule.
+ /// </summary>
+ public abstract string[] ValidAttributeTargets { get; }
+ };
+
+ public class Attribute {
+ public readonly string ExplicitTarget;
+ public AttributeTargets Target;
+
+ public readonly string Name;
+ public readonly Expression LeftExpr;
+ public readonly string Identifier;
+
+ public readonly ArrayList Arguments;
+
+ public readonly Location Location;
+
+ public Type Type;
+
+ bool resolve_error;
+
+ // Is non-null if type is AttributeUsageAttribute
+ AttributeUsageAttribute usage_attribute;
+
+ public AttributeUsageAttribute UsageAttribute {
+ get {
+ return usage_attribute;
+ }
+ }
+
+ MethodImplOptions ImplOptions;
+ UnmanagedType UnmanagedType;
+ CustomAttributeBuilder cb;
+
+ // non-null if named args present after Resolve () is called
+ PropertyInfo [] prop_info_arr;
+ FieldInfo [] field_info_arr;
+ object [] field_values_arr;
+ object [] prop_values_arr;
+ object [] pos_values;
+
+ static PtrHashtable usage_attr_cache = new PtrHashtable ();
+
+ public Attribute (string target, Expression left_expr, string identifier, ArrayList args, Location loc)
+ {
+ LeftExpr = left_expr;
+ Identifier = identifier;
+ Name = LeftExpr == null ? identifier : LeftExpr + "." + identifier;
+ Arguments = args;
+ Location = loc;
+ ExplicitTarget = target;
+ }
+
+ void Error_InvalidNamedArgument (string name)
+ {
+ Report.Error (617, Location, "Invalid attribute argument: '{0}'. Argument must be fields " +
+ "fields which are not readonly, static or const; or read-write instance properties.",
+ name);
+ }
+
+ static void Error_AttributeArgumentNotValid (string extra, Location loc)
+ {
+ Report.Error (182, loc,
+ "An attribute argument must be a constant expression, typeof " +
+ "expression or array creation expression" + extra);
+ }
+
+ static void Error_AttributeArgumentNotValid (Location loc)
+ {
+ Error_AttributeArgumentNotValid ("", loc);
+ }
+
+ static void Error_TypeParameterInAttribute (Location loc)
+ {
+ Report.Error (
+ -202, loc, "Can not use a type parameter in an attribute");
+ }
+
+ /// <summary>
+ /// This is rather hack. We report many emit attribute error with same error to be compatible with
+ /// csc. But because csc has to report them this way because error came from ilasm we needn't.
+ /// </summary>
+ public void Error_AttributeEmitError (string inner)
+ {
+ Report.Error (647, Location, "Error emitting '{0}' attribute because '{1}'", Name, inner);
+ }
+
+ public void Error_InvalidSecurityParent ()
+ {
+ Error_AttributeEmitError ("it is attached to invalid parent");
+ }
+
+ void Error_AttributeConstructorMismatch ()
+ {
+ Report.Error (-6, Location,
+ "Could not find a constructor for this argument list.");
+ }
+
+ void ResolvePossibleAttributeTypes (EmitContext ec, out Type t1, out Type t2)
+ {
+ t1 = null;
+ t2 = null;
+
+ FullNamedExpression n1 = null;
+ FullNamedExpression n2 = null;
+ string IdentifierAttribute = Identifier + "Attribute";
+ if (LeftExpr == null) {
+ n1 = new SimpleName (Identifier, Location).ResolveAsTypeStep (ec);
+
+ // FIXME: Shouldn't do this for quoted attributes: [@A]
+ n2 = new SimpleName (IdentifierAttribute, Location).ResolveAsTypeStep (ec);
+ } else {
+ FullNamedExpression l = LeftExpr.ResolveAsTypeStep (ec);
+ if (l == null) {
+ Report.Error (246, Location, "Couldn't find namespace or type '{0}'", LeftExpr);
+ return;
+ }
+ n1 = new MemberAccess (l, Identifier, Location).ResolveNamespaceOrType (ec, true);
+
+ // FIXME: Shouldn't do this for quoted attributes: [X.@A]
+ n2 = new MemberAccess (l, IdentifierAttribute, Location).ResolveNamespaceOrType (ec, true);
+ }
+
+ TypeExpr te1 = n1 == null ? null : n1 as TypeExpr;
+ TypeExpr te2 = n2 == null ? null : n2 as TypeExpr;
+
+ if (te1 != null)
+ t1 = te1.ResolveType (ec);
+ if (te2 != null)
+ t2 = te2.ResolveType (ec);
+ }
+
+ /// <summary>
+ /// Tries to resolve the type of the attribute. Flags an error if it can't, and complain is true.
+ /// </summary>
+ Type CheckAttributeType (EmitContext ec)
+ {
+ Type t1, t2;
+ ResolvePossibleAttributeTypes (ec, out t1, out t2);
+
+ string NameAttribute = Name + "Attribute";
+
+ String err0616 = null;
+ if (t1 != null && ! t1.IsSubclassOf (TypeManager.attribute_type)) {
+ t1 = null;
+ err0616 = "'" + Name + "': is not an attribute class";
+ }
+ if (t2 != null && ! t2.IsSubclassOf (TypeManager.attribute_type)) {
+ t2 = null;
+ err0616 = (err0616 != null)
+ ? "Neither '" + Name + "' nor '" + NameAttribute +"' is an attribute class"
+ : "'" + Name + "Attribute': is not an attribute class";
+ }
+
+ if (t1 != null && t2 != null) {
+ Report.Error(1614, Location, "'" + Name + "': is ambiguous; "
+ + " use either '@" + Name + "' or '" + NameAttribute + "'");
+ return null;
+ }
+ if (t1 != null)
+ return t1;
+ if (t2 != null)
+ return t2;
+ if (err0616 != null) {
+ Report.Error (616, Location, err0616);
+ return null;
+ }
+
+ Report.Error (246, Location,
+ "Could not find attribute '" + Name
+ + "' (are you missing a using directive or an assembly reference ?)");
+
+ resolve_error = true;
+ return null;
+ }
+
+ public virtual Type ResolveType (EmitContext ec)
+ {
+ if (Type == null)
+ Type = CheckAttributeType (ec);
+ return Type;
+ }
+
+ /// <summary>
+ /// Validates the guid string
+ /// </summary>
+ bool ValidateGuid (string guid)
+ {
+ try {
+ new Guid (guid);
+ return true;
+ } catch {
+ Report.Error (647, Location, "Format of GUID is invalid: " + guid);
+ return false;
+ }
+ }
+
+ string GetFullMemberName (string member)
+ {
+ return Type.FullName + '.' + member;
+ }
+
+ //
+ // Given an expression, if the expression is a valid attribute-argument-expression
+ // returns an object that can be used to encode it, or null on failure.
+ //
+ public static bool GetAttributeArgumentExpression (Expression e, Location loc, Type arg_type, out object result)
+ {
+ if (e is EnumConstant) {
+ if (RootContext.StdLib)
+ result = ((EnumConstant)e).GetValueAsEnumType ();
+ else
+ result = ((EnumConstant)e).GetValue ();
+
+ return true;
+ }
+
+ Constant constant = e as Constant;
+ if (constant != null) {
+ if (e.Type != arg_type) {
+ constant = Const.ChangeType (loc, constant, arg_type);
+ if (constant == null) {
+ result = null;
+ Error_AttributeArgumentNotValid (loc);
+ return false;
+ }
+ }
+ result = constant.GetValue ();
+ return true;
+ } else if (e is TypeOf) {
+ result = ((TypeOf) e).TypeArg;
+ return true;
+ } else if (e is ArrayCreation){
+ result = ((ArrayCreation) e).EncodeAsAttribute ();
+ if (result != null)
+ return true;
+ } else if (e is EmptyCast) {
+ Expression child = ((EmptyCast)e).Child;
+ return GetAttributeArgumentExpression (child, loc, child.Type, out result);
+ }
+
+ result = null;
+ Error_AttributeArgumentNotValid (loc);
+ return false;
+ }
+
+ public virtual CustomAttributeBuilder Resolve (EmitContext ec)
+ {
+ if (resolve_error)
+ return null;
+
+ resolve_error = true;
+
+ Type oldType = Type;
+
+ // Sanity check.
+ Type = CheckAttributeType (ec);
+
+ if (oldType == null && Type == null)
+ return null;
+ if (oldType != null && oldType != Type){
+ Report.Error (-27, Location,
+ "Attribute {0} resolved to different types at different times: {1} vs. {2}",
+ Name, oldType, Type);
+ return null;
+ }
+
+ if (Type.IsAbstract) {
+ Report.Error (653, Location, "Cannot apply attribute class '{0}' because it is abstract", Name);
+ return null;
+ }
+
+ bool MethodImplAttr = false;
+ bool MarshalAsAttr = false;
+ bool GuidAttr = false;
+ bool usage_attr = false;
+
+ bool DoCompares = true;
+
+ //
+ // If we are a certain special attribute, we
+ // set the information accordingly
+ //
+
+ if (Type == TypeManager.attribute_usage_type)
+ usage_attr = true;
+ else if (Type == TypeManager.methodimpl_attr_type)
+ MethodImplAttr = true;
+ else if (Type == TypeManager.marshal_as_attr_type)
+ MarshalAsAttr = true;
+ else if (Type == TypeManager.guid_attr_type)
+ GuidAttr = true;
+ else
+ DoCompares = false;
+
+ // 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];
+ }
+
+ 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;
+
+ object val;
+ if (!GetAttributeArgumentExpression (e, Location, a.Type, out val))
+ return null;
+
+ pos_values [i] = val;
+
+ if (DoCompares){
+ if (usage_attr) {
+ if ((int)val == 0) {
+ Report.Error (591, Location, "Invalid value for argument to 'System.AttributeUsage' attribute");
+ return null;
+ }
+ usage_attribute = new AttributeUsageAttribute ((AttributeTargets)val);
+ } else if (MethodImplAttr) {
+ this.ImplOptions = (MethodImplOptions) val;
+ } else if (GuidAttr){
+ //
+ // we will later check the validity of the type
+ //
+ if (val is string){
+ if (!ValidateGuid ((string) val))
+ return null;
+ }
+
+ } else if (MarshalAsAttr)
+ this.UnmanagedType =
+ (System.Runtime.InteropServices.UnmanagedType) val;
+ }
+ }
+
+ //
+ // Now process named arguments
+ //
+
+ ArrayList field_infos = null;
+ ArrayList prop_infos = null;
+ ArrayList field_values = null;
+ ArrayList prop_values = null;
+
+ if (named_args.Count > 0) {
+ field_infos = new ArrayList ();
+ prop_infos = new ArrayList ();
+ field_values = new ArrayList ();
+ prop_values = new ArrayList ();
+ }
+
+ Hashtable seen_names = new Hashtable();
+
+ 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 (seen_names.Contains(member_name)) {
+ Report.Error(643, Location, "'" + member_name + "' duplicate named attribute argument");
+ return null;
+ }
+ seen_names.Add(member_name, 1);
+
+ 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 = Expression.MemberLookup (ec, Type, member_name,
+ MemberTypes.Field | MemberTypes.Property, BindingFlags.NonPublic | BindingFlags.Instance,
+ Location);
+
+ if (member != null) {
+ Report.Error (122, Location, "'{0}' is inaccessible due to its protection level", GetFullMemberName (member_name));
+ return null;
+ }
+ }
+
+ if (member == null){
+ Report.Error (117, Location, "Attribute `{0}' does not contain a definition for `{1}'",
+ Type, member_name);
+ return null;
+ }
+
+ if (!(member is PropertyExpr || member is FieldExpr)) {
+ Error_InvalidNamedArgument (member_name);
+ return null;
+ }
+
+ e = a.Expr;
+ if (e is TypeParameterExpr){
+ Error_TypeParameterInAttribute (Location);
+ return null;
+ }
+
+ if (member is PropertyExpr) {
+ PropertyExpr pe = (PropertyExpr) member;
+ PropertyInfo pi = pe.PropertyInfo;
+
+ if (!pi.CanWrite || !pi.CanRead) {
+ Report.SymbolRelatedToPreviousError (pi);
+ Error_InvalidNamedArgument (member_name);
+ return null;
+ }
+
+ object value;
+ if (!GetAttributeArgumentExpression (e, Location, pi.PropertyType, out value))
+ return null;
+
+ if (usage_attribute != null) {
+ if (member_name == "AllowMultiple")
+ usage_attribute.AllowMultiple = (bool) value;
+ if (member_name == "Inherited")
+ usage_attribute.Inherited = (bool) value;
+ }
+
+ prop_values.Add (value);
+ 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;
+ }
+
+ object value;
+ if (!GetAttributeArgumentExpression (e, Location, fi.FieldType, out value))
+ return null;
+
+ field_values.Add (value);
+
+ field_infos.Add (fi);
+ }
+ }
+
+ Expression mg = Expression.MemberLookup (
+ ec, Type, ".ctor", MemberTypes.Constructor,
+ BindingFlags.Public | BindingFlags.Instance | BindingFlags.DeclaredOnly,
+ Location);
+
+ if (mg == null) {
+ Error_AttributeConstructorMismatch ();
+ return null;
+ }
+
+ MethodBase constructor = Invocation.OverloadResolve (
+ ec, (MethodGroupExpr) mg, pos_args, false, Location);
+
+ if (constructor == null) {
+ 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 = TypeManager.GetParameterData (constructor);
+
+ int last_real_param = pd.Count;
+ if (pd.HasParams) {
+ // When the params is not filled we need to put one
+ if (last_real_param > pos_arg_count) {
+ object [] new_pos_values = new object [pos_arg_count + 1];
+ pos_values.CopyTo (new_pos_values, 0);
+ new_pos_values [pos_arg_count] = new object [] {} ;
+ pos_values = new_pos_values;
+ }
+ last_real_param--;
+ }
+
+ 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 (Location);
+ return null;
+ }
+
+ object value = pos_values [j];
+ if (value != null && a.Type != value.GetType () && a.Type.IsPrimitive) {
+ bool fail;
+ pos_values [j] = TypeManager.ChangeType (value, a.Type, out fail);
+ if (fail) {
+ // TODO: Can failed ?
+ throw new NotImplementedException ();
+ }
+ }
+
+ if (j < last_real_param)
+ continue;
+
+ if (j == last_real_param) {
+ object [] array = new object [pos_arg_count - last_real_param];
+ array [0] = pos_values [j];
+ pos_values [j] = array;
+ continue;
+ }
+
+ object [] params_array = (object []) pos_values [last_real_param];
+ params_array [j - last_real_param] = pos_values [j];
+ }
+
+ // Adjust the size of the pos_values if it had params
+ if (last_real_param != pos_arg_count) {
+ object [] new_pos_values = new object [last_real_param + 1];
+ Array.Copy (pos_values, new_pos_values, last_real_param + 1);
+ pos_values = new_pos_values;
+ }
+
+ try {
+ if (named_args.Count > 0) {
+ prop_info_arr = new PropertyInfo [prop_infos.Count];
+ field_info_arr = new FieldInfo [field_infos.Count];
+ field_values_arr = new object [field_values.Count];
+ 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);
+
+ cb = new CustomAttributeBuilder (
+ (ConstructorInfo) constructor, pos_values,
+ prop_info_arr, prop_values_arr,
+ field_info_arr, field_values_arr);
+ }
+ else
+ cb = new CustomAttributeBuilder (
+ (ConstructorInfo) constructor, pos_values);
+ } catch (Exception e) {
+ //
+ // Sample:
+ // using System.ComponentModel;
+ // [DefaultValue (CollectionChangeAction.Add)]
+ // class X { static void Main () {} }
+ //
+ Error_AttributeArgumentNotValid (Location);
+ return null;
+ }
+
+ resolve_error = false;
+ return cb;
+ }
+
+ /// <summary>
+ /// Get a string containing a list of valid targets for the attribute 'attr'
+ /// </summary>
+ public string GetValidTargets ()
+ {
+ StringBuilder sb = new StringBuilder ();
+ AttributeTargets targets = GetAttributeUsage ().ValidOn;
+
+ 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' ");
+
+ if ((targets & AttributeTargets.Struct) != 0)
+ sb.Append ("'struct' ");
+
+ return sb.ToString ();
+
+ }
+
+ /// <summary>
+ /// Returns AttributeUsage attribute for this type
+ /// </summary>
+ public AttributeUsageAttribute GetAttributeUsage ()
+ {
+ AttributeUsageAttribute ua = usage_attr_cache [Type] as AttributeUsageAttribute;
+ if (ua != null)
+ return ua;
+
+ Class attr_class = TypeManager.LookupClass (Type);
+
+ if (attr_class == null) {
+ object[] usage_attr = Type.GetCustomAttributes (TypeManager.attribute_usage_type, true);
+ ua = (AttributeUsageAttribute)usage_attr [0];
+ usage_attr_cache.Add (Type, ua);
+ return ua;
+ }
+
+ return attr_class.AttributeUsage;
+ }
+
+ /// <summary>
+ /// Returns custom name of indexer
+ /// </summary>
+ public string GetIndexerAttributeValue (EmitContext ec)
+ {
+ if (pos_values == null)
+ // TODO: It is not neccessary to call whole Resolve (ApplyAttribute does it now) we need only ctor args.
+ // But because a lot of attribute class code must be rewritten will be better to wait...
+ Resolve (ec);
+
+ return pos_values [0] as string;
+ }
+
+ /// <summary>
+ /// Returns condition of ConditionalAttribute
+ /// </summary>
+ public string GetConditionalAttributeValue (EmitContext ec)
+ {
+ if (pos_values == null)
+ // TODO: It is not neccessary to call whole Resolve (ApplyAttribute does it now) we need only ctor args.
+ // But because a lot of attribute class code must be rewritten will be better to wait...
+ Resolve (ec);
+
+ // Some error occurred
+ if (pos_values [0] == null)
+ return null;
+
+ return (string)pos_values [0];
+ }
+
+ /// <summary>
+ /// Creates the instance of ObsoleteAttribute from this attribute instance
+ /// </summary>
+ public ObsoleteAttribute GetObsoleteAttribute (EmitContext ec)
+ {
+ if (pos_values == null)
+ // TODO: It is not neccessary to call whole Resolve (ApplyAttribute does it now) we need only ctor args.
+ // But because a lot of attribute class code must be rewritten will be better to wait...
+ Resolve (ec);
+
+ // Some error occurred
+ if (pos_values == null)
+ return null;
+
+ if (pos_values.Length == 0)
+ return new ObsoleteAttribute ();
+
+ if (pos_values.Length == 1)
+ return new ObsoleteAttribute ((string)pos_values [0]);
+
+ return new ObsoleteAttribute ((string)pos_values [0], (bool)pos_values [1]);
+ }
+
+ /// <summary>
+ /// Returns value of CLSCompliantAttribute contructor parameter but because the method can be called
+ /// before ApplyAttribute. We need to resolve the arguments.
+ /// This situation occurs when class deps is differs from Emit order.
+ /// </summary>
+ public bool GetClsCompliantAttributeValue (EmitContext ec)
+ {
+ if (pos_values == null)
+ // TODO: It is not neccessary to call whole Resolve (ApplyAttribute does it now) we need only ctor args.
+ // But because a lot of attribute class code must be rewritten will be better to wait...
+ Resolve (ec);
+
+ // Some error occurred
+ if (pos_values [0] == null)
+ return false;
+
+ return (bool)pos_values [0];
+ }
+
+ /// <summary>
+ /// Tests permitted SecurityAction for assembly or other types
+ /// </summary>
+ public bool CheckSecurityActionValidity (bool for_assembly)
+ {
+ SecurityAction action = GetSecurityActionValue ();
+
+ if ((action == SecurityAction.RequestMinimum || action == SecurityAction.RequestOptional || action == SecurityAction.RequestRefuse) && for_assembly)
+ return true;
+
+ if (!for_assembly) {
+ if (action < SecurityAction.Demand || action > SecurityAction.InheritanceDemand) {
+ Error_AttributeEmitError ("SecurityAction is out of range");
+ return false;
+ }
+
+ if ((action != SecurityAction.RequestMinimum && action != SecurityAction.RequestOptional && action != SecurityAction.RequestRefuse) && !for_assembly)
+ return true;
+ }
+
+ Error_AttributeEmitError (String.Concat ("SecurityAction '", action, "' is not valid for this declaration"));
+ return false;
+ }
+
+ System.Security.Permissions.SecurityAction GetSecurityActionValue ()
+ {
+ return (SecurityAction)pos_values [0];
+ }
+
+ /// <summary>
+ /// Creates instance of SecurityAttribute class and add result of CreatePermission method to permission table.
+ /// </summary>
+ /// <returns></returns>
+ public void ExtractSecurityPermissionSet (ListDictionary permissions)
+ {
+ if (TypeManager.LookupDeclSpace (Type) != null && RootContext.StdLib) {
+ Error_AttributeEmitError ("security custom attributes can not be referenced from defining assembly");
+ return;
+ }
+
+ SecurityAttribute sa;
+ // For all assemblies except corlib we can avoid all hacks
+ if (RootContext.StdLib) {
+ sa = (SecurityAttribute) Activator.CreateInstance (Type, pos_values);
+
+ if (prop_info_arr != null) {
+ for (int i = 0; i < prop_info_arr.Length; ++i) {
+ PropertyInfo pi = prop_info_arr [i];
+ pi.SetValue (sa, prop_values_arr [i], null);
+ }
+ }
+ } else {
+ Type temp_type = Type.GetType (Type.FullName);
+ // HACK: All mscorlib attributes have same ctor syntax
+ sa = (SecurityAttribute) Activator.CreateInstance (temp_type, new object[] { GetSecurityActionValue () } );
+
+ // All types are from newly created corlib but for invocation with old we need to convert them
+ if (prop_info_arr != null) {
+ for (int i = 0; i < prop_info_arr.Length; ++i) {
+ PropertyInfo emited_pi = prop_info_arr [i];
+ PropertyInfo pi = temp_type.GetProperty (emited_pi.Name, emited_pi.PropertyType);
+
+ object old_instance = pi.PropertyType.IsEnum ?
+ System.Enum.ToObject (pi.PropertyType, prop_values_arr [i]) :
+ prop_values_arr [i];
+
+ pi.SetValue (sa, old_instance, null);
+ }
+ }
+ }
+
+ IPermission perm;
+ try {
+ perm = sa.CreatePermission ();
+ }
+ catch (Exception e) {
+ Error_AttributeEmitError (String.Format ("{0} was thrown during attribute processing: {1}", e.GetType (), e.Message));
+ return;
+ }
+ SecurityAction action = GetSecurityActionValue ();
+
+ // IS is correct because for corlib we are using an instance from old corlib
+ if (!(perm is System.Security.CodeAccessPermission)) {
+ switch (action) {
+ case SecurityAction.Demand:
+ action = (SecurityAction)13;
+ break;
+ case SecurityAction.LinkDemand:
+ action = (SecurityAction)14;
+ break;
+ case SecurityAction.InheritanceDemand:
+ action = (SecurityAction)15;
+ break;
+ }
+ }
+
+ PermissionSet ps = (PermissionSet)permissions [action];
+ if (ps == null) {
+ if (sa is PermissionSetAttribute)
+ ps = new PermissionSet (sa.Unrestricted ? PermissionState.Unrestricted : PermissionState.None);
+ else
+ ps = new PermissionSet (PermissionState.None);
+
+ permissions.Add (action, ps);
+ } else if (!ps.IsUnrestricted () && sa.Unrestricted) {
+ ps = ps.Union (new PermissionSet (PermissionState.Unrestricted));
+ permissions [action] = ps;
+ }
+ ps.AddPermission (perm);
+ }
+
+ object GetValue (object value)
+ {
+ if (value is EnumConstant)
+ return ((EnumConstant) value).GetValue ();
+ else
+ return value;
+ }
+
+ public object GetPositionalValue (int i)
+ {
+ return (pos_values == null) ? null : pos_values[i];
+ }
+
+ object GetFieldValue (string name)
+ {
+ int i;
+ if (field_info_arr == null)
+ return null;
+ i = 0;
+ foreach (FieldInfo fi in field_info_arr) {
+ if (fi.Name == name)
+ return GetValue (field_values_arr [i]);
+ i++;
+ }
+ return null;
+ }
+
+ public UnmanagedMarshal GetMarshal (Attributable attr)
+ {
+ object value = GetFieldValue ("SizeParamIndex");
+ if (value != null && UnmanagedType != UnmanagedType.LPArray) {
+ Error_AttributeEmitError ("SizeParamIndex field is not valid for the specified unmanaged type");
+ return null;
+ }
+
+ object o = GetFieldValue ("ArraySubType");
+ UnmanagedType array_sub_type = o == null ? UnmanagedType.I4 : (UnmanagedType) o;
+
+ switch (UnmanagedType) {
+ case UnmanagedType.CustomMarshaler:
+ MethodInfo define_custom = typeof (UnmanagedMarshal).GetMethod ("DefineCustom",
+ BindingFlags.Static | BindingFlags.Public);
+ if (define_custom == null) {
+ Report.RuntimeMissingSupport (Location, "set marshal info");
+ return null;
+ }
+
+ object [] args = new object [4];
+ args [0] = GetFieldValue ("MarshalTypeRef");
+ args [1] = GetFieldValue ("MarshalCookie");
+ args [2] = GetFieldValue ("MarshalType");
+ args [3] = Guid.Empty;
+ return (UnmanagedMarshal) define_custom.Invoke (null, args);
+
+ case UnmanagedType.LPArray:
+ return UnmanagedMarshal.DefineLPArray (array_sub_type);
+
+ case UnmanagedType.SafeArray:
+ return UnmanagedMarshal.DefineSafeArray (array_sub_type);
+
+ case UnmanagedType.ByValArray:
+ FieldMember fm = attr as FieldMember;
+ if (fm == null) {
+ Error_AttributeEmitError ("Specified unmanaged type is only valid on fields");
+ return null;
+ }
+ return UnmanagedMarshal.DefineByValArray ((int) GetFieldValue ("SizeConst"));
+
+ case UnmanagedType.ByValTStr:
+ return UnmanagedMarshal.DefineByValTStr ((int) GetFieldValue ("SizeConst"));
+
+ default:
+ return UnmanagedMarshal.DefineUnmanagedMarshal (UnmanagedType);
+ }
+ }
+
+ public bool IsInternalCall
+ {
+ get { return ImplOptions == MethodImplOptions.InternalCall; }
+ }
+
+ /// <summary>
+ /// Emit attribute for Attributable symbol
+ /// </summary>
+ public void Emit (EmitContext ec, Attributable ias, ListDictionary emitted_attr)
+ {
+ CustomAttributeBuilder cb = Resolve (ec);
+ if (cb == null)
+ return;
+
+ AttributeUsageAttribute usage_attr = GetAttributeUsage ();
+ if ((usage_attr.ValidOn & Target) == 0) {
+ Report.Error (592, Location, "Attribute '{0}' is not valid on this declaration type. It is valid on {1} declarations only.", Name, GetValidTargets ());
+ return;
+ }
+
+ ias.ApplyAttributeBuilder (this, cb);
+
+ if (!usage_attr.AllowMultiple) {
+ ArrayList emitted_targets = (ArrayList)emitted_attr [Type];
+ if (emitted_targets == null) {
+ emitted_targets = new ArrayList ();
+ emitted_attr.Add (Type, emitted_targets);
+ } else if (emitted_targets.Contains (Target)) {
+ Report.Error (579, Location, "Duplicate '" + Name + "' attribute");
+ return;
+ }
+ emitted_targets.Add (Target);
+ }
+
+ if (!RootContext.VerifyClsCompliance)
+ return;
+
+ // Here we are testing attribute arguments for array usage (error 3016)
+ if (ias.IsClsCompliaceRequired (ec.DeclSpace)) {
+ if (Arguments == null)
+ return;
+
+ ArrayList pos_args = (ArrayList) Arguments [0];
+ if (pos_args != null) {
+ foreach (Argument arg in pos_args) {
+ // Type is undefined (was error 246)
+ if (arg.Type == null)
+ return;
+
+ if (arg.Type.IsArray) {
+ Report.Error (3016, Location, "Arrays as attribute arguments are not CLS-compliant");
+ return;
+ }
+ }
+ }
+
+ if (Arguments.Count < 2)
+ return;
+
+ ArrayList named_args = (ArrayList) Arguments [1];
+ foreach (DictionaryEntry de in named_args) {
+ Argument arg = (Argument) de.Value;
+
+ // Type is undefined (was error 246)
+ if (arg.Type == null)
+ return;
+
+ if (arg.Type.IsArray) {
+ Report.Error (3016, Location, "Arrays as attribute arguments are not CLS-compliant");
+ return;
+ }
+ }
+ }
+ }
+
+ public object GetValue (EmitContext ec, Constant c, Type target)
+ {
+ if (Convert.ImplicitConversionExists (ec, c, target))
+ return c.GetValue ();
+
+ Convert.Error_CannotImplicitConversion (Location, c.Type, target);
+ return null;
+ }
+
+ 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;
+ }
+
+ ResolveType (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 (Location);
+ return null;
+ }
+ if (dll_name == null || dll_name == ""){
+ Error_AttributeArgumentNotValid (": DllImport requires a non-empty string", Location);
+ return null;
+ }
+
+ // Now we process the named arguments
+ CallingConvention cc = CallingConvention.Winapi;
+ CharSet charset = CharSet.Ansi;
+ bool preserve_sig = true;
+#if FIXME
+ bool exact_spelling = false;
+#endif
+ 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;
+
+ try {
+ if (member_name == "CallingConvention"){
+ object val = GetValue (ec, c, typeof (CallingConvention));
+ if (val == null)
+ return null;
+ cc = (CallingConvention) val;
+ } 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 ();
+#if FIXME
+ else if (member_name == "ExactSpelling")
+ exact_spelling = (bool) c.GetValue ();
+#endif
+ else if (member_name == "PreserveSig")
+ preserve_sig = (bool) c.GetValue ();
+ } catch (InvalidCastException){
+ Error_InvalidNamedArgument (member_name);
+ Error_AttributeArgumentNotValid (Location);
+ }
+ } else {
+ Error_AttributeArgumentNotValid (Location);
+ return null;
+ }
+
+ }
+ }
+
+ if (entry_point == null)
+ entry_point = name;
+ if (set_last_err)
+ charset = (CharSet)((int)charset | 0x40);
+
+ 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;
+ }
+
+ private Expression GetValue ()
+ {
+ if ((Arguments == null) || (Arguments.Count < 1))
+ return null;
+ ArrayList al = (ArrayList) Arguments [0];
+ if ((al == null) || (al.Count < 1))
+ return null;
+ Argument arg = (Argument) al [0];
+ if ((arg == null) || (arg.Expr == null))
+ return null;
+ return arg.Expr;
+ }
+
+ public string GetString ()
+ {
+ Expression e = GetValue ();
+ if (e is StringLiteral)
+ return (e as StringLiteral).Value;
+ return null;
+ }
+
+ public bool GetBoolean ()
+ {
+ Expression e = GetValue ();
+ if (e is BoolLiteral)
+ return (e as BoolLiteral).Value;
+ return false;
+ }
+ }
+
+
+ /// <summary>
+ /// For global attributes (assembly, module) we need special handling.
+ /// Attributes can be located in the several files
+ /// </summary>
+ public class GlobalAttribute: Attribute
+ {
+ public readonly NamespaceEntry ns;
+
+ public GlobalAttribute (TypeContainer container, string target,
+ Expression left_expr, string identifier, ArrayList args, Location loc):
+ base (target, left_expr, identifier, args, loc)
+ {
+ ns = container.NamespaceEntry;
+ }
+
+ void Enter ()
+ {
+ // RootContext.Tree.Types has a single NamespaceEntry which gets overwritten
+ // each time a new file is parsed. However, we need to use the NamespaceEntry
+ // in effect where the attribute was used. Since code elsewhere cannot assume
+ // that the NamespaceEntry is right, just overwrite it.
+ //
+ // Precondition: RootContext.Tree.Types == null
+
+ if (RootContext.Tree.Types.NamespaceEntry != null)
+ throw new InternalErrorException (Location + " non-null NamespaceEntry");
+
+ RootContext.Tree.Types.NamespaceEntry = ns;
+ }
+
+ void Leave ()
+ {
+ RootContext.Tree.Types.NamespaceEntry = null;
+ }
+
+ public override Type ResolveType (EmitContext ec)
+ {
+ Enter ();
+ Type retval = base.ResolveType (ec);
+ Leave ();
+ return retval;
+ }
+
+ public override CustomAttributeBuilder Resolve (EmitContext ec)
+ {
+ Enter ();
+ CustomAttributeBuilder retval = base.Resolve (ec);
+ Leave ();
+ return retval;
+ }
+ }
+
+ public class Attributes {
+ public ArrayList Attrs;
+
+ public Attributes (Attribute a)
+ {
+ Attrs = new ArrayList ();
+ Attrs.Add (a);
+ }
+
+ public Attributes (ArrayList attrs)
+ {
+ Attrs = attrs;
+ }
+
+ public void AddAttributes (ArrayList attrs)
+ {
+ Attrs.AddRange (attrs);
+ }
+
+ /// <summary>
+ /// Checks whether attribute target is valid for the current element
+ /// </summary>
+ public bool CheckTargets (Attributable member)
+ {
+ string[] valid_targets = member.ValidAttributeTargets;
+ foreach (Attribute a in Attrs) {
+ if (a.ExplicitTarget == null || a.ExplicitTarget == valid_targets [0]) {
+ a.Target = member.AttributeTargets;
+ continue;
+ }
+
+ // TODO: we can skip the first item
+ if (((IList) valid_targets).Contains (a.ExplicitTarget)) {
+ switch (a.ExplicitTarget) {
+ case "return": a.Target = AttributeTargets.ReturnValue; continue;
+ case "param": a.Target = AttributeTargets.Parameter; continue;
+ case "field": a.Target = AttributeTargets.Field; continue;
+ case "method": a.Target = AttributeTargets.Method; continue;
+ case "property": a.Target = AttributeTargets.Property; continue;
+ }
+ throw new InternalErrorException ("Unknown explicit target: " + a.ExplicitTarget);
+ }
+
+ StringBuilder sb = new StringBuilder ();
+ foreach (string s in valid_targets) {
+ sb.Append (s);
+ sb.Append (", ");
+ }
+ sb.Remove (sb.Length - 2, 2);
+ Report.Error (657, a.Location, "'{0}' is not a valid attribute location for this declaration. Valid attribute locations for this declaration are '{1}'", a.ExplicitTarget, sb.ToString ());
+ return false;
+ }
+ return true;
+ }
+
+ public Attribute Search (Type t, EmitContext ec)
+ {
+ foreach (Attribute a in Attrs) {
+ if (a.ResolveType (ec) == t)
+ return a;
+ }
+ return null;
+ }
+
+ /// <summary>
+ /// Returns all attributes of type 't'. Use it when attribute is AllowMultiple = true
+ /// </summary>
+ public Attribute[] SearchMulti (Type t, EmitContext ec)
+ {
+ ArrayList ar = null;
+
+ foreach (Attribute a in Attrs) {
+ if (a.ResolveType (ec) == t) {
+ if (ar == null)
+ ar = new ArrayList ();
+ ar.Add (a);
+ }
+ }
+
+ return ar == null ? null : ar.ToArray (typeof (Attribute)) as Attribute[];
+ }
+
+ public void Emit (EmitContext ec, Attributable ias)
+ {
+ if (!CheckTargets (ias))
+ return;
+
+ ListDictionary ld = new ListDictionary ();
+
+ foreach (Attribute a in Attrs)
+ a.Emit (ec, ias, ld);
+ }
+
+ public bool Contains (Type t, EmitContext ec)
+ {
+ return Search (t, ec) != null;
+ }
+ }
+
+ /// <summary>
+ /// Helper class for attribute verification routine.
+ /// </summary>
+ sealed class AttributeTester
+ {
+ static PtrHashtable analyzed_types = new PtrHashtable ();
+ static PtrHashtable analyzed_types_obsolete = new PtrHashtable ();
+ static PtrHashtable analyzed_member_obsolete = new PtrHashtable ();
+ static PtrHashtable analyzed_method_excluded = new PtrHashtable ();
+ static PtrHashtable fixed_buffer_cache = new PtrHashtable ();
+
+ static object TRUE = new object ();
+ static object FALSE = new object ();
+
+ private AttributeTester ()
+ {
+ }
+
+ /// <summary>
+ /// Returns true if parameters of two compared methods are CLS-Compliant.
+ /// It tests differing only in ref or out, or in array rank.
+ /// </summary>
+ public static bool AreOverloadedMethodParamsClsCompliant (Type[] types_a, Type[] types_b)
+ {
+ if (types_a == null || types_b == null)
+ return true;
+
+ if (types_a.Length != types_b.Length)
+ return true;
+
+ for (int i = 0; i < types_b.Length; ++i) {
+ Type aType = types_a [i];
+ Type bType = types_b [i];
+
+ if (aType.IsArray && bType.IsArray && aType.GetArrayRank () != bType.GetArrayRank () && aType.GetElementType () == bType.GetElementType ()) {
+ return false;
+ }
+
+ Type aBaseType = aType;
+ bool is_either_ref_or_out = false;
+
+ if (aType.IsByRef || aType.IsPointer) {
+ aBaseType = aType.GetElementType ();
+ is_either_ref_or_out = true;
+ }
+
+ Type bBaseType = bType;
+ if (bType.IsByRef || bType.IsPointer)
+ {
+ bBaseType = bType.GetElementType ();
+ is_either_ref_or_out = !is_either_ref_or_out;
+ }
+
+ if (aBaseType != bBaseType)
+ continue;
+
+ if (is_either_ref_or_out)
+ return false;
+ }
+ return true;
+ }
+
+ /// <summary>
+ /// Goes through all parameters and test if they are CLS-Compliant.
+ /// </summary>
+ public static bool AreParametersCompliant (Parameter[] fixedParameters, Location loc)
+ {
+ if (fixedParameters == null)
+ return true;
+
+ foreach (Parameter arg in fixedParameters) {
+ if (!AttributeTester.IsClsCompliant (arg.ParameterType)) {
+ Report.Error (3001, loc, "Argument type '{0}' is not CLS-compliant", arg.GetSignatureForError ());
+ return false;
+ }
+ }
+ return true;
+ }
+
+
+ /// <summary>
+ /// This method tests the CLS compliance of external types. It doesn't test type visibility.
+ /// </summary>
+ public static bool IsClsCompliant (Type type)
+ {
+ if (type == null)
+ return true;
+
+ object type_compliance = analyzed_types[type];
+ if (type_compliance != null)
+ return type_compliance == TRUE;
+
+ if (type.IsPointer) {
+ analyzed_types.Add (type, null);
+ return false;
+ }
+
+ bool result;
+ if (type.IsArray || type.IsByRef) {
+ result = IsClsCompliant (TypeManager.GetElementType (type));
+ } else {
+ result = AnalyzeTypeCompliance (type);
+ }
+ analyzed_types.Add (type, result ? TRUE : FALSE);
+ return result;
+ }
+
+ /// <summary>
+ /// Returns IFixedBuffer implementation if field is fixed buffer else null.
+ /// </summary>
+ public static IFixedBuffer GetFixedBuffer (FieldInfo fi)
+ {
+ FieldBase fb = TypeManager.GetField (fi);
+ if (fb != null) {
+ return fb as IFixedBuffer;
+ }
+
+#if NET_2_0
+ object o = fixed_buffer_cache [fi];
+ if (o == null) {
+ if (System.Attribute.GetCustomAttribute (fi, TypeManager.fixed_buffer_attr_type) == null) {
+ fixed_buffer_cache.Add (fi, FALSE);
+ return null;
+ }
+
+ IFixedBuffer iff = new FixedFieldExternal (fi);
+ fixed_buffer_cache.Add (fi, iff);
+ return iff;
+ }
+
+ if (o == FALSE)
+ return null;
+
+ return (IFixedBuffer)o;
+#else
+ return null;
+#endif
+ }
+
+ public static void VerifyModulesClsCompliance ()
+ {
+ Module[] modules = TypeManager.Modules;
+ if (modules == null)
+ return;
+
+ // The first module is generated assembly
+ for (int i = 1; i < modules.Length; ++i) {
+ Module module = modules [i];
+ if (!IsClsCompliant (module)) {
+ Report.Error (3013, "Added modules must be marked with the CLSCompliant attribute to match the assembly", module.Name);
+ return;
+ }
+ }
+ }
+
+ /// <summary>
+ /// Tests container name for CLS-Compliant name (differing only in case)
+ /// </summary>
+ public static void VerifyTopLevelNameClsCompliance ()
+ {
+ Hashtable locase_table = new Hashtable ();
+
+ // Convert imported type names to lower case and ignore not cls compliant
+ foreach (DictionaryEntry de in TypeManager.all_imported_types) {
+ Type t = (Type)de.Value;
+ if (!AttributeTester.IsClsCompliant (t))
+ continue;
+
+ locase_table.Add (((string)de.Key).ToLower (System.Globalization.CultureInfo.InvariantCulture), t);
+ }
+
+ foreach (DictionaryEntry de in RootContext.Tree.Decls) {
+ DeclSpace decl = (DeclSpace)de.Value;
+ if (!decl.IsClsCompliaceRequired (decl))
+ continue;
+
+ string lcase = decl.Name.ToLower (System.Globalization.CultureInfo.InvariantCulture);
+ if (!locase_table.Contains (lcase)) {
+ locase_table.Add (lcase, decl);
+ continue;
+ }
+
+ object conflict = locase_table [lcase];
+ if (conflict is Type)
+ Report.SymbolRelatedToPreviousError ((Type)conflict);
+ else
+ Report.SymbolRelatedToPreviousError ((MemberCore)conflict);
+
+ Report.Error (3005, decl.Location, "Identifier '{0}' differing only in case is not CLS-compliant", decl.GetSignatureForError ());
+ }
+ }
+
+ static bool IsClsCompliant (ICustomAttributeProvider attribute_provider)
+ {
+ object[] CompliantAttribute = attribute_provider.GetCustomAttributes (TypeManager.cls_compliant_attribute_type, false);
+ if (CompliantAttribute.Length == 0)
+ return false;
+
+ return ((CLSCompliantAttribute)CompliantAttribute[0]).IsCompliant;
+ }
+
+ static bool AnalyzeTypeCompliance (Type type)
+ {
+ DeclSpace ds = TypeManager.LookupDeclSpace (type);
+ if (ds != null) {
+ return ds.IsClsCompliaceRequired (ds.Parent);
+ }
+
+ if (type.IsGenericParameter || type.IsGenericInstance)
+ return false;
+
+ object[] CompliantAttribute = type.GetCustomAttributes (TypeManager.cls_compliant_attribute_type, false);
+ if (CompliantAttribute.Length == 0)
+ return IsClsCompliant (type.Assembly);
+
+ return ((CLSCompliantAttribute)CompliantAttribute[0]).IsCompliant;
+ }
+
+ /// <summary>
+ /// Returns instance of ObsoleteAttribute when type is obsolete
+ /// </summary>
+ public static ObsoleteAttribute GetObsoleteAttribute (Type type)
+ {
+ object type_obsolete = analyzed_types_obsolete [type];
+ if (type_obsolete == FALSE)
+ return null;
+
+ if (type_obsolete != null)
+ return (ObsoleteAttribute)type_obsolete;
+
+ ObsoleteAttribute result = null;
+ if (type.IsByRef || type.IsArray || type.IsPointer) {
+ result = GetObsoleteAttribute (TypeManager.GetElementType (type));
+ } else if (type.IsGenericParameter || type.IsGenericInstance)
+ return null;
+ else {
+ DeclSpace type_ds = TypeManager.LookupDeclSpace (type);
+
+ // Type is external, we can get attribute directly
+ if (type_ds == null) {
+ object[] attribute = type.GetCustomAttributes (TypeManager.obsolete_attribute_type, false);
+ if (attribute.Length == 1)
+ result = (ObsoleteAttribute)attribute [0];
+ } else {
+ result = type_ds.GetObsoleteAttribute (type_ds);
+ }
+ }
+
+ analyzed_types_obsolete.Add (type, result == null ? FALSE : result);
+ return result;
+ }
+
+ /// <summary>
+ /// Returns instance of ObsoleteAttribute when method is obsolete
+ /// </summary>
+ public static ObsoleteAttribute GetMethodObsoleteAttribute (MethodBase mb)
+ {
+ IMethodData mc = TypeManager.GetMethod (mb);
+ if (mc != null)
+ return mc.GetObsoleteAttribute ();
+
+ // compiler generated methods are not registered by AddMethod
+ if (mb.DeclaringType is TypeBuilder)
+ return null;
+
+ PropertyInfo pi = PropertyExpr.AccessorTable [mb] as PropertyInfo;
+ if (pi != null)
+ return GetMemberObsoleteAttribute (pi);
+
+ return GetMemberObsoleteAttribute (mb);
+ }
+
+ /// <summary>
+ /// Returns instance of ObsoleteAttribute when member is obsolete
+ /// </summary>
+ public static ObsoleteAttribute GetMemberObsoleteAttribute (MemberInfo mi)
+ {
+ object type_obsolete = analyzed_member_obsolete [mi];
+ if (type_obsolete == FALSE)
+ return null;
+
+ if (type_obsolete != null)
+ return (ObsoleteAttribute)type_obsolete;
+
+ if ((mi.DeclaringType is TypeBuilder) || mi.DeclaringType.IsGenericInstance)
+ return null;
+
+ ObsoleteAttribute oa = System.Attribute.GetCustomAttribute (mi, TypeManager.obsolete_attribute_type, false) as ObsoleteAttribute;
+ analyzed_member_obsolete.Add (mi, oa == null ? FALSE : oa);
+ return oa;
+ }
+
+ /// <summary>
+ /// Common method for Obsolete error/warning reporting.
+ /// </summary>
+ public static void Report_ObsoleteMessage (ObsoleteAttribute oa, string member, Location loc)
+ {
+ if (oa.IsError) {
+ Report.Error (619, loc, "'{0}' is obsolete: '{1}'", member, oa.Message);
+ return;
+ }
+
+ if (oa.Message == null) {
+ Report.Warning (612, loc, "'{0}' is obsolete", member);
+ return;
+ }
+ if (RootContext.WarningLevel >= 2)
+ Report.Warning (618, loc, "'{0}' is obsolete: '{1}'", member, oa.Message);
+ }
+
+ public static bool IsConditionalMethodExcluded (MethodBase mb)
+ {
+ object excluded = analyzed_method_excluded [mb];
+ if (excluded != null)
+ return excluded == TRUE ? true : false;
+
+ if (mb.Mono_IsInflatedMethod)
+ return false;
+
+ ConditionalAttribute[] attrs = mb.GetCustomAttributes (TypeManager.conditional_attribute_type, true) as ConditionalAttribute[];
+ if (attrs.Length == 0) {
+ analyzed_method_excluded.Add (mb, FALSE);
+ return false;
+ }
+
+ foreach (ConditionalAttribute a in attrs) {
+ if (RootContext.AllDefines.Contains (a.ConditionString)) {
+ analyzed_method_excluded.Add (mb, FALSE);
+ return false;
+ }
+ }
+ analyzed_method_excluded.Add (mb, TRUE);
+ return true;
+ }
+ }
+}
projects / mono.git / blobdiff