Add MetadataProperty.

ICSharpCode.Decompiler/ICSharpCode.Decompiler.csproj

@@ -348,9 +348,11 @@
     <Compile Include="TypeSystem\Implementation\MetadataMethod.cs" />
     <Compile Include="TypeSystem\Implementation\MetadataNamespace.cs" />
     <Compile Include="TypeSystem\Implementation\MetadataParameter.cs" />
+    <Compile Include="TypeSystem\Implementation\MetadataProperty.cs" />
     <Compile Include="TypeSystem\Implementation\MetadataTypeDefinition.cs" />
     <Compile Include="TypeSystem\Implementation\MetadataTypeParameter.cs" />
     <Compile Include="TypeSystem\Implementation\MetadataTypeReference.cs" />
+    <Compile Include="TypeSystem\Implementation\SpecializedParameter.cs" />
     <Compile Include="TypeSystem\MetadataAssembly.cs" />
     <Compile Include="TypeSystem\ModifiedType.cs" />
     <Compile Include="TypeSystem\Implementation\TypeSpecification.cs" />

ICSharpCode.Decompiler/TypeSystem/Implementation/DefaultResolvedProperty.cs

@@ -86,14 +86,7 @@ namespace ICSharpCode.Decompiler.TypeSystem.Implementation
 		
 		public override IMember Specialize(TypeParameterSubstitution substitution)
 		{
-			if (TypeParameterSubstitution.Identity.Equals(substitution)
-			    || DeclaringType.TypeParameterCount == 0)
-			{
-				return this;
-			}
-			if (substitution.MethodTypeArguments != null && substitution.MethodTypeArguments.Count > 0)
-				substitution = new TypeParameterSubstitution(substitution.ClassTypeArguments, EmptyList<IType>.Instance);
-			return new SpecializedProperty(this, substitution);
+			return SpecializedProperty.Create(this, substitution);
 		}
 	}
 }

ICSharpCode.Decompiler/TypeSystem/Implementation/MetadataMethod.cs

@@ -25,8 +25,6 @@ using System.Reflection.Metadata;
 using System.Reflection.Metadata.Ecma335;
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
-using System.Text;
-using ICSharpCode.Decompiler.Metadata;
 using ICSharpCode.Decompiler.Semantics;
 using ICSharpCode.Decompiler.Util;
 
@@ -130,15 +128,23 @@ namespace ICSharpCode.Decompiler.TypeSystem.Implementation
 
 		private void DecodeSignature()
 		{
-			var metadata = assembly.metadata;
-			var methodDef = metadata.GetMethodDefinition(handle);
+			var methodDef = assembly.metadata.GetMethodDefinition(handle);
 			var genericContext = new GenericContext(DeclaringType.TypeParameters, this.TypeParameters);
 			var signature = methodDef.DecodeSignature(assembly.TypeProvider, genericContext);
+			var (returnType, parameters) = DecodeSignature(assembly, this, signature, methodDef.GetParameters());
+			LazyInit.GetOrSet(ref this.returnType, returnType);
+			LazyInit.GetOrSet(ref this.parameters, parameters);
+		}
+
+		internal static (IType, IParameter[]) DecodeSignature(MetadataAssembly assembly, IParameterizedMember owner, MethodSignature<IType> signature, ParameterHandleCollection? parameterHandles)
+		{
+			var metadata = assembly.metadata;
 			int i = 0;
 			CustomAttributeHandleCollection? returnTypeAttributes = null;
 			IParameter[] parameters = new IParameter[signature.RequiredParameterCount
 				+ (signature.Header.CallingConvention == SignatureCallingConvention.VarArgs ? 1 : 0)];
-			foreach (var parameterHandle in methodDef.GetParameters()) {
+			if (parameterHandles != null) {
+				foreach (var parameterHandle in parameterHandles) {
 					var par = metadata.GetParameter(parameterHandle);
 					if (par.SequenceNumber == 0) {
 						// "parameter" holds return type attributes
@@ -146,28 +152,28 @@ namespace ICSharpCode.Decompiler.TypeSystem.Implementation
 					} else if (par.SequenceNumber > 0 && i < signature.RequiredParameterCount) {
 						Debug.Assert(par.SequenceNumber - 1 == i);
 						var parameterType = ApplyAttributeTypeVisitor.ApplyAttributesToType(
-						signature.ParameterTypes[i], Compilation,
+							signature.ParameterTypes[i], assembly.Compilation,
 							par.GetCustomAttributes(), metadata, assembly.TypeSystemOptions);
-					parameters[i] = new MetadataParameter(assembly, this, parameterType, parameterHandle);
+						parameters[i] = new MetadataParameter(assembly, owner, parameterType, parameterHandle);
 						i++;
 					}
 				}
+			}
 			while (i < signature.RequiredParameterCount) {
 				var parameterType = ApplyAttributeTypeVisitor.ApplyAttributesToType(
-					signature.ParameterTypes[i], Compilation, null, metadata, assembly.TypeSystemOptions);
-				parameters[i] = new DefaultParameter(parameterType, name: string.Empty, owner: this,
+					signature.ParameterTypes[i], assembly.Compilation, null, metadata, assembly.TypeSystemOptions);
+				parameters[i] = new DefaultParameter(parameterType, name: string.Empty, owner,
 					isRef: parameterType.Kind == TypeKind.ByReference);
 				i++;
 			}
 			if (signature.Header.CallingConvention == SignatureCallingConvention.VarArgs) {
-				parameters[i] = new DefaultParameter(SpecialType.ArgList, name: string.Empty, owner: this);
+				parameters[i] = new DefaultParameter(SpecialType.ArgList, name: string.Empty, owner);
 				i++;
 			}
 			Debug.Assert(i == parameters.Length);
 			var returnType = ApplyAttributeTypeVisitor.ApplyAttributesToType(signature.ReturnType,
-				Compilation, returnTypeAttributes, metadata, assembly.TypeSystemOptions);
-			LazyInit.GetOrSet(ref this.returnType, returnType);
-			LazyInit.GetOrSet(ref this.parameters, parameters);
+				assembly.Compilation, returnTypeAttributes, metadata, assembly.TypeSystemOptions);
+			return (returnType, parameters);
 		}
 		#endregion
 

ICSharpCode.Decompiler/TypeSystem/Implementation/MetadataProperty.cs

@@ -0,0 +1,228 @@
+// Copyright (c) 2018 Daniel Grunwald
+// 
+// Permission is hereby granted, free of charge, to any person obtaining a copy of this
+// software and associated documentation files (the "Software"), to deal in the Software
+// without restriction, including without limitation the rights to use, copy, modify, merge,
+// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
+// to whom the Software is furnished to do so, subject to the following conditions:
+// 
+// The above copyright notice and this permission notice shall be included in all copies or
+// substantial portions of the Software.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
+// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
+// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+// DEALINGS IN THE SOFTWARE.
+
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using System.Reflection;
+using System.Reflection.Metadata;
+using System.Reflection.Metadata.Ecma335;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+using ICSharpCode.Decompiler.Semantics;
+using ICSharpCode.Decompiler.Util;
+
+namespace ICSharpCode.Decompiler.TypeSystem.Implementation
+{
+	sealed class MetadataProperty : IProperty
+	{
+		const Accessibility InvalidAccessibility = (Accessibility)0xff;
+
+		readonly MetadataAssembly assembly;
+		readonly PropertyDefinitionHandle propertyHandle;
+		readonly MethodDefinitionHandle getterHandle;
+		readonly MethodDefinitionHandle setterHandle;
+
+		// lazy-loaded:
+		string name;
+		IAttribute[] customAttributes;
+		volatile Accessibility cachedAccessiblity = InvalidAccessibility;
+		IParameter[] parameters;
+		IType returnType;
+		
+		internal MetadataProperty(MetadataAssembly assembly, PropertyDefinitionHandle handle)
+		{
+			Debug.Assert(assembly != null);
+			Debug.Assert(!handle.IsNil);
+			this.assembly = assembly;
+			this.propertyHandle = handle;
+
+			var metadata = assembly.metadata;
+			var prop = metadata.GetPropertyDefinition(handle);
+			var accessors = prop.GetAccessors();
+			getterHandle = accessors.Getter;
+			setterHandle = accessors.Setter;
+		}
+
+		public EntityHandle MetadataToken => propertyHandle;
+
+		public string Name {
+			get {
+				string name = LazyInit.VolatileRead(ref this.name);
+				if (name != null)
+					return name;
+				var metadata = assembly.metadata;
+				var propertyDef = metadata.GetPropertyDefinition(propertyHandle);
+				return LazyInit.GetOrSet(ref this.name, metadata.GetString(propertyDef.Name));
+			}
+		}
+
+		public bool CanGet => !getterHandle.IsNil;
+		public bool CanSet => !setterHandle.IsNil;
+
+		public IMethod Getter => assembly.GetDefinition(getterHandle);
+		public IMethod Setter => assembly.GetDefinition(setterHandle);
+
+		public bool IsIndexer => SymbolKind == SymbolKind.Indexer;
+		public SymbolKind SymbolKind => throw new NotImplementedException();
+
+		#region Signature (ReturnType + Parameters)
+		public IReadOnlyList<IParameter> Parameters {
+			get {
+				var parameters = LazyInit.VolatileRead(ref this.parameters);
+				if (parameters != null)
+					return parameters;
+				DecodeSignature();
+				return this.parameters;
+			}
+		}
+
+		public IType ReturnType {
+			get {
+				var returnType = LazyInit.VolatileRead(ref this.returnType);
+				if (returnType != null)
+					return returnType;
+				DecodeSignature();
+				return this.returnType;
+			}
+		}
+
+		private void DecodeSignature()
+		{
+			var propertyDef = assembly.metadata.GetPropertyDefinition(propertyHandle);
+			var genericContext = new GenericContext(DeclaringType.TypeParameters);
+			var signature = propertyDef.DecodeSignature(assembly.TypeProvider, genericContext);
+			ParameterHandleCollection? parameterHandles;
+			if (!getterHandle.IsNil)
+				parameterHandles = assembly.metadata.GetMethodDefinition(getterHandle).GetParameters();
+			else if (!setterHandle.IsNil)
+				parameterHandles = assembly.metadata.GetMethodDefinition(setterHandle).GetParameters();
+			else
+				parameterHandles = null;
+			var (returnType, parameters) = MetadataMethod.DecodeSignature(assembly, this, signature, parameterHandles);
+			LazyInit.GetOrSet(ref this.returnType, returnType);
+			LazyInit.GetOrSet(ref this.parameters, parameters);
+		}
+		#endregion
+
+		public IReadOnlyList<IMember> ImplementedInterfaceMembers => throw new NotImplementedException();
+
+		public bool IsExplicitInterfaceImplementation => throw new NotImplementedException();
+
+		public ITypeDefinition DeclaringTypeDefinition => (Getter ?? Setter)?.DeclaringTypeDefinition;
+		public IType DeclaringType => (Getter ?? Setter)?.DeclaringType;
+		IMember IMember.MemberDefinition => this;
+		TypeParameterSubstitution IMember.Substitution => TypeParameterSubstitution.Identity;
+
+		#region Attributes
+		public IReadOnlyList<IAttribute> Attributes {
+			get {
+				var attr = LazyInit.VolatileRead(ref this.customAttributes);
+				if (attr != null)
+					return attr;
+				return LazyInit.GetOrSet(ref this.customAttributes, DecodeAttributes());
+			}
+		}
+
+		IAttribute[] DecodeAttributes()
+		{
+			var b = new AttributeListBuilder(assembly);
+			var metadata = assembly.metadata;
+			var propertyDef = metadata.GetPropertyDefinition(propertyHandle);
+			b.Add(propertyDef.GetCustomAttributes());
+			return b.Build();
+		}
+		#endregion
+
+		#region Accessibility
+		public Accessibility Accessibility {
+			get {
+				var acc = cachedAccessiblity;
+				if (acc == InvalidAccessibility)
+					return cachedAccessiblity = ComputeAccessibility();
+				else
+					return acc;
+			}
+		}
+
+		Accessibility ComputeAccessibility()
+		{
+			if (IsOverride && (getterHandle.IsNil || setterHandle.IsNil)) {
+				foreach (var baseMember in InheritanceHelper.GetBaseMembers(this, includeImplementedInterfaces: false)) {
+					if (!baseMember.IsOverride)
+						return baseMember.Accessibility;
+				}
+			}
+			return MergePropertyAccessibility(
+				this.Getter?.Accessibility ?? Accessibility.None,
+				this.Setter?.Accessibility ?? Accessibility.None);
+		}
+
+		static internal Accessibility MergePropertyAccessibility(Accessibility left, Accessibility right)
+		{
+			if (left == Accessibility.Public || right == Accessibility.Public)
+				return Accessibility.Public;
+
+			if (left == Accessibility.ProtectedOrInternal || right == Accessibility.ProtectedOrInternal)
+				return Accessibility.ProtectedOrInternal;
+
+			if (left == Accessibility.Protected && right == Accessibility.Internal ||
+				left == Accessibility.Internal && right == Accessibility.Protected)
+				return Accessibility.ProtectedOrInternal;
+
+			if (left == Accessibility.Protected || right == Accessibility.Protected)
+				return Accessibility.Protected;
+
+			if (left == Accessibility.Internal || right == Accessibility.Internal)
+				return Accessibility.Internal;
+
+			if (left == Accessibility.ProtectedAndInternal || right == Accessibility.ProtectedAndInternal)
+				return Accessibility.ProtectedAndInternal;
+
+			return left;
+		}
+		#endregion
+
+		public bool IsStatic => (Getter ?? Setter)?.IsStatic ?? false;
+		public bool IsAbstract => (Getter ?? Setter)?.IsAbstract ?? false;
+		public bool IsSealed => (Getter ?? Setter)?.IsSealed ?? false;
+		public bool IsVirtual => (Getter ?? Setter)?.IsVirtual ?? false;
+		public bool IsOverride => (Getter ?? Setter)?.IsOverride ?? false;
+		public bool IsOverridable => (Getter ?? Setter)?.IsOverridable ?? false;
+
+		bool IEntity.IsShadowing => (Getter ?? Setter)?.IsShadowing ?? false;
+
+		public IAssembly ParentAssembly => assembly;
+		public ICompilation Compilation => assembly.Compilation;
+
+		public string FullName => $"{DeclaringType?.FullName}.{Name}";
+		public string ReflectionName => $"{DeclaringType?.ReflectionName}.{Name}";
+		public string Namespace => DeclaringType?.Namespace ?? string.Empty;
+
+		bool IMember.Equals(IMember obj, TypeVisitor typeNormalization)
+		{
+			return this == obj;
+		}
+
+		public IMember Specialize(TypeParameterSubstitution substitution)
+		{
+			return SpecializedProperty.Create(this, substitution);
+		}
+	}
+}

ICSharpCode.Decompiler/TypeSystem/Implementation/SpecializedMember.cs

@@ -302,11 +302,7 @@ namespace ICSharpCode.Decompiler.TypeSystem.Implementation
 				for (int i = 0; i < parameters.Length; i++) {
 					var p = paramDefs[i];
 					IType newType = substitution(p.Type);
-					parameters[i] = new DefaultParameter(
-						newType, p.Name, this,
-						p.Attributes, p.IsRef, p.IsOut,
-						p.IsParams, p.IsOptional, p.ConstantValue
-					);
+					parameters[i] = new SpecializedParameter(p, newType, this);
 				}
 				return parameters;
 			}

ICSharpCode.Decompiler/TypeSystem/Implementation/SpecializedParameter.cs

@@ -0,0 +1,51 @@
+// Copyright (c) 2018 Daniel Grunwald
+// 
+// Permission is hereby granted, free of charge, to any person obtaining a copy of this
+// software and associated documentation files (the "Software"), to deal in the Software
+// without restriction, including without limitation the rights to use, copy, modify, merge,
+// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
+// to whom the Software is furnished to do so, subject to the following conditions:
+// 
+// The above copyright notice and this permission notice shall be included in all copies or
+// substantial portions of the Software.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
+// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
+// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+// DEALINGS IN THE SOFTWARE.
+
+using System.Collections.Generic;
+using System.Diagnostics;
+
+namespace ICSharpCode.Decompiler.TypeSystem.Implementation
+{
+	sealed class SpecializedParameter : IParameter
+	{
+		readonly IParameter baseParameter;
+		readonly IType newType;
+		readonly IParameterizedMember newOwner;
+
+		public SpecializedParameter(IParameter baseParameter, IType newType, IParameterizedMember newOwner)
+		{
+			Debug.Assert(baseParameter != null && newType != null);
+			this.baseParameter = baseParameter;
+			this.newType = newType;
+			this.newOwner = newOwner;
+		}
+
+		IReadOnlyList<IAttribute> IParameter.Attributes => baseParameter.Attributes;
+		bool IParameter.IsRef => baseParameter.IsRef;
+		bool IParameter.IsOut => baseParameter.IsOptional;
+		bool IParameter.IsParams => baseParameter.IsParams;
+		bool IParameter.IsOptional => baseParameter.IsOptional;
+		IParameterizedMember IParameter.Owner => newOwner;
+		string IVariable.Name => baseParameter.Name;
+		string ISymbol.Name => baseParameter.Name;
+		IType IVariable.Type => newType;
+		bool IVariable.IsConst => baseParameter.IsConst;
+		object IVariable.ConstantValue => baseParameter.ConstantValue;
+		SymbolKind ISymbol.SymbolKind => SymbolKind.Parameter;
+	}
+}

ICSharpCode.Decompiler/TypeSystem/Implementation/SpecializedProperty.cs

@@ -16,6 +16,8 @@
 // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 // DEALINGS IN THE SOFTWARE.
 
+using ICSharpCode.Decompiler.Util;
+
 namespace ICSharpCode.Decompiler.TypeSystem.Implementation
 {
 	/// <summary>
@@ -23,6 +25,16 @@ namespace ICSharpCode.Decompiler.TypeSystem.Implementation
 	/// </summary>
 	public class SpecializedProperty : SpecializedParameterizedMember, IProperty
 	{
+		internal static IProperty Create(IProperty propertyDefinition, TypeParameterSubstitution substitution)
+		{
+			if (TypeParameterSubstitution.Identity.Equals(substitution) || propertyDefinition.DeclaringType.TypeParameterCount == 0) {
+				return propertyDefinition;
+			}
+			if (substitution.MethodTypeArguments != null && substitution.MethodTypeArguments.Count > 0)
+				substitution = new TypeParameterSubstitution(substitution.ClassTypeArguments, EmptyList<IType>.Instance);
+			return new SpecializedProperty(propertyDefinition, substitution);
+		}
+
 		readonly IProperty propertyDefinition;
 		
 		public SpecializedProperty(IProperty propertyDefinition, TypeParameterSubstitution substitution)

ICSharpCode.Decompiler/TypeSystem/MetadataAssembly.cs

@@ -50,6 +50,7 @@ namespace ICSharpCode.Decompiler.TypeSystem
 		readonly MetadataTypeDefinition[] typeDefs;
 		readonly MetadataField[] fieldDefs;
 		readonly MetadataMethod[] methodDefs;
+		readonly MetadataProperty[] propertyDefs;
 
 		internal MetadataAssembly(ICompilation compilation, Metadata.PEFile peFile, TypeSystemOptions options)
 		{
@@ -75,6 +76,7 @@ namespace ICSharpCode.Decompiler.TypeSystem
 			this.typeDefs = new MetadataTypeDefinition[metadata.TypeDefinitions.Count + 1];
 			this.fieldDefs = new MetadataField[metadata.FieldDefinitions.Count + 1];
 			this.methodDefs = new MetadataMethod[metadata.MethodDefinitions.Count + 1];
+			this.propertyDefs = new MetadataProperty[metadata.PropertyDefinitions.Count + 1];
 		}
 
 		internal string GetString(StringHandle name)
@@ -198,7 +200,14 @@ namespace ICSharpCode.Decompiler.TypeSystem
 
 		public IProperty GetDefinition(PropertyDefinitionHandle handle)
 		{
-			throw new NotImplementedException();
+			int row = MetadataTokens.GetRowNumber(handle);
+			if (row >= methodDefs.Length)
+				return null;
+			var property = LazyInit.VolatileRead(ref propertyDefs[row]);
+			if (property != null || handle.IsNil)
+				return property;
+			property = new MetadataProperty(this, handle);
+			return LazyInit.GetOrSet(ref propertyDefs[row], property);
 		}
 
 		public IEvent GetDefinition(EventDefinitionHandle handle)