mirror of
https://github.com/icsharpcode/ILSpy.git
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362 lines
12 KiB
C#
362 lines
12 KiB
C#
// Copyright (c) 2010-2013 AlphaSierraPapa for the SharpDevelop Team
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy of this
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// software and associated documentation files (the "Software"), to deal in the Software
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// without restriction, including without limitation the rights to use, copy, modify, merge,
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// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
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// to whom the Software is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all copies or
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// substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
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// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
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// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.Linq;
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using System.Text;
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using ICSharpCode.Decompiler.TypeSystem.Implementation;
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namespace ICSharpCode.Decompiler.TypeSystem
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{
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/// <summary>
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/// ParameterizedType represents an instance of a generic type.
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/// Example: List<string>
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/// </summary>
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/// <remarks>
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/// When getting the members, this type modifies the lists so that
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/// type parameters in the signatures of the members are replaced with
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/// the type arguments.
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/// </remarks>
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[Serializable]
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public sealed class ParameterizedType : IType
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{
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readonly IType genericType;
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readonly IType[] typeArguments;
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public ParameterizedType(IType genericType, IEnumerable<IType> typeArguments)
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{
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if (genericType == null)
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throw new ArgumentNullException(nameof(genericType));
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if (typeArguments == null)
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throw new ArgumentNullException(nameof(typeArguments));
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this.genericType = genericType;
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this.typeArguments = typeArguments.ToArray(); // copy input array to ensure it isn't modified
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if (this.typeArguments.Length == 0)
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throw new ArgumentException("Cannot use ParameterizedType with 0 type arguments.");
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if (genericType.TypeParameterCount != this.typeArguments.Length)
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throw new ArgumentException("Number of type arguments must match the type definition's number of type parameters");
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ICompilationProvider gp = genericType as ICompilationProvider;
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for (int i = 0; i < this.typeArguments.Length; i++)
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{
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if (this.typeArguments[i] == null)
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throw new ArgumentNullException("typeArguments[" + i + "]");
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ICompilationProvider p = this.typeArguments[i] as ICompilationProvider;
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if (p != null && gp != null && p.Compilation != gp.Compilation)
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throw new InvalidOperationException("Cannot parameterize a type with type arguments from a different compilation.");
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}
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}
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/// <summary>
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/// Fast internal version of the constructor. (no safety checks)
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/// Keeps the array that was passed and assumes it won't be modified.
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/// </summary>
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internal ParameterizedType(IType genericType, params IType[] typeArguments)
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{
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Debug.Assert(genericType.TypeParameterCount == typeArguments.Length);
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this.genericType = genericType;
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this.typeArguments = typeArguments;
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}
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public TypeKind Kind {
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get { return genericType.Kind; }
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}
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public IType GenericType {
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get { return genericType; }
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}
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public bool? IsReferenceType => genericType.IsReferenceType;
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public bool IsByRefLike => genericType.IsByRefLike;
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public Nullability Nullability => genericType.Nullability;
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public IType ChangeNullability(Nullability nullability)
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{
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IType newGenericType = genericType.ChangeNullability(nullability);
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if (newGenericType == genericType)
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return this;
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else
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return new ParameterizedType(newGenericType, typeArguments);
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}
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public IType DeclaringType {
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get {
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IType declaringType = genericType.DeclaringType;
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if (declaringType != null && declaringType.TypeParameterCount > 0
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&& declaringType.TypeParameterCount <= genericType.TypeParameterCount)
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{
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IType[] newTypeArgs = new IType[declaringType.TypeParameterCount];
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Array.Copy(this.typeArguments, 0, newTypeArgs, 0, newTypeArgs.Length);
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return new ParameterizedType(declaringType, newTypeArgs);
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}
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return declaringType;
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}
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}
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public int TypeParameterCount {
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get { return typeArguments.Length; }
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}
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public string FullName {
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get { return genericType.FullName; }
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}
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public string Name {
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get { return genericType.Name; }
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}
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public string Namespace {
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get { return genericType.Namespace; }
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}
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public string ReflectionName {
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get {
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StringBuilder b = new StringBuilder(genericType.ReflectionName);
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b.Append('[');
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for (int i = 0; i < typeArguments.Length; i++)
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{
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if (i > 0)
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b.Append(',');
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b.Append('[');
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b.Append(typeArguments[i].ReflectionName);
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b.Append(']');
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}
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b.Append(']');
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return b.ToString();
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}
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}
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public override string ToString()
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{
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StringBuilder b = new StringBuilder(genericType.ToString());
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b.Append('[');
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for (int i = 0; i < typeArguments.Length; i++)
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{
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if (i > 0)
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b.Append(',');
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b.Append('[');
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b.Append(typeArguments[i].ToString());
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b.Append(']');
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}
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b.Append(']');
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return b.ToString();
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}
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public IReadOnlyList<IType> TypeArguments => typeArguments;
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/// <summary>
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/// Same as 'parameterizedType.TypeArguments[index]'.
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/// </summary>
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public IType GetTypeArgument(int index)
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{
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return typeArguments[index];
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}
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public IReadOnlyList<ITypeParameter> TypeParameters => genericType.TypeParameters;
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/// <summary>
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/// Gets the definition of the generic type.
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/// For <c>ParameterizedType</c>, this method never returns null.
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/// </summary>
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public ITypeDefinition GetDefinition()
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{
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return genericType.GetDefinition();
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}
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public ITypeDefinitionOrUnknown GetDefinitionOrUnknown()
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{
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return genericType.GetDefinitionOrUnknown();
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}
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/// <summary>
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/// Gets a type visitor that performs the substitution of class type parameters with the type arguments
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/// of this parameterized type.
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/// </summary>
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public TypeParameterSubstitution GetSubstitution()
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{
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return new TypeParameterSubstitution(typeArguments, null);
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}
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/// <summary>
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/// Gets a type visitor that performs the substitution of class type parameters with the type arguments
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/// of this parameterized type,
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/// and also substitutes method type parameters with the specified method type arguments.
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/// </summary>
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public TypeParameterSubstitution GetSubstitution(IReadOnlyList<IType> methodTypeArguments)
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{
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return new TypeParameterSubstitution(typeArguments, methodTypeArguments);
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}
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public IEnumerable<IType> DirectBaseTypes {
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get {
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var substitution = GetSubstitution();
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return genericType.DirectBaseTypes.Select(t => t.AcceptVisitor(substitution));
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}
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}
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public IEnumerable<IType> GetNestedTypes(Predicate<ITypeDefinition> filter = null, GetMemberOptions options = GetMemberOptions.None)
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{
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if ((options & GetMemberOptions.ReturnMemberDefinitions) == GetMemberOptions.ReturnMemberDefinitions)
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return genericType.GetNestedTypes(filter, options);
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else
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return GetMembersHelper.GetNestedTypes(this, filter, options);
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}
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public IEnumerable<IType> GetNestedTypes(IReadOnlyList<IType> typeArguments, Predicate<ITypeDefinition> filter = null, GetMemberOptions options = GetMemberOptions.None)
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{
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if ((options & GetMemberOptions.ReturnMemberDefinitions) == GetMemberOptions.ReturnMemberDefinitions)
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return genericType.GetNestedTypes(typeArguments, filter, options);
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else
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return GetMembersHelper.GetNestedTypes(this, typeArguments, filter, options);
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}
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public IEnumerable<IMethod> GetConstructors(Predicate<IMethod> filter = null, GetMemberOptions options = GetMemberOptions.IgnoreInheritedMembers)
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{
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if ((options & GetMemberOptions.ReturnMemberDefinitions) == GetMemberOptions.ReturnMemberDefinitions)
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return genericType.GetConstructors(filter, options);
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else
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return GetMembersHelper.GetConstructors(this, filter, options);
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}
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public IEnumerable<IMethod> GetMethods(Predicate<IMethod> filter = null, GetMemberOptions options = GetMemberOptions.None)
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{
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if ((options & GetMemberOptions.ReturnMemberDefinitions) == GetMemberOptions.ReturnMemberDefinitions)
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return genericType.GetMethods(filter, options);
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else
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return GetMembersHelper.GetMethods(this, filter, options);
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}
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public IEnumerable<IMethod> GetMethods(IReadOnlyList<IType> typeArguments, Predicate<IMethod> filter = null, GetMemberOptions options = GetMemberOptions.None)
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{
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if ((options & GetMemberOptions.ReturnMemberDefinitions) == GetMemberOptions.ReturnMemberDefinitions)
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return genericType.GetMethods(typeArguments, filter, options);
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else
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return GetMembersHelper.GetMethods(this, typeArguments, filter, options);
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}
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public IEnumerable<IProperty> GetProperties(Predicate<IProperty> filter = null, GetMemberOptions options = GetMemberOptions.None)
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{
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if ((options & GetMemberOptions.ReturnMemberDefinitions) == GetMemberOptions.ReturnMemberDefinitions)
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return genericType.GetProperties(filter, options);
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else
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return GetMembersHelper.GetProperties(this, filter, options);
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}
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public IEnumerable<IField> GetFields(Predicate<IField> filter = null, GetMemberOptions options = GetMemberOptions.None)
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{
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if ((options & GetMemberOptions.ReturnMemberDefinitions) == GetMemberOptions.ReturnMemberDefinitions)
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return genericType.GetFields(filter, options);
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else
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return GetMembersHelper.GetFields(this, filter, options);
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}
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public IEnumerable<IEvent> GetEvents(Predicate<IEvent> filter = null, GetMemberOptions options = GetMemberOptions.None)
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{
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if ((options & GetMemberOptions.ReturnMemberDefinitions) == GetMemberOptions.ReturnMemberDefinitions)
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return genericType.GetEvents(filter, options);
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else
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return GetMembersHelper.GetEvents(this, filter, options);
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}
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public IEnumerable<IMember> GetMembers(Predicate<IMember> filter = null, GetMemberOptions options = GetMemberOptions.None)
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{
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if ((options & GetMemberOptions.ReturnMemberDefinitions) == GetMemberOptions.ReturnMemberDefinitions)
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return genericType.GetMembers(filter, options);
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else
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return GetMembersHelper.GetMembers(this, filter, options);
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}
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public IEnumerable<IMethod> GetAccessors(Predicate<IMethod> filter = null, GetMemberOptions options = GetMemberOptions.None)
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{
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if ((options & GetMemberOptions.ReturnMemberDefinitions) == GetMemberOptions.ReturnMemberDefinitions)
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return genericType.GetAccessors(filter, options);
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else
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return GetMembersHelper.GetAccessors(this, filter, options);
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}
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public override bool Equals(object obj)
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{
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return Equals(obj as IType);
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}
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public bool Equals(IType other)
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{
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if (this == other)
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return true;
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ParameterizedType c = other as ParameterizedType;
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if (c == null || !genericType.Equals(c.genericType) || typeArguments.Length != c.typeArguments.Length)
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return false;
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for (int i = 0; i < typeArguments.Length; i++)
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{
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if (!typeArguments[i].Equals(c.typeArguments[i]))
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return false;
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}
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return true;
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}
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public override int GetHashCode()
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{
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int hashCode = genericType.GetHashCode();
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unchecked
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{
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foreach (var ta in typeArguments)
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{
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hashCode *= 1000000007;
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hashCode += 1000000009 * ta.GetHashCode();
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}
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}
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return hashCode;
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}
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public IType AcceptVisitor(TypeVisitor visitor)
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{
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return visitor.VisitParameterizedType(this);
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}
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public IType VisitChildren(TypeVisitor visitor)
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{
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IType g = genericType.AcceptVisitor(visitor);
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// Keep ta == null as long as no elements changed, allocate the array only if necessary.
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IType[] ta = (g != genericType) ? new IType[typeArguments.Length] : null;
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for (int i = 0; i < typeArguments.Length; i++)
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{
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IType r = typeArguments[i].AcceptVisitor(visitor);
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if (r == null)
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throw new NullReferenceException("TypeVisitor.Visit-method returned null");
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if (ta == null && r != typeArguments[i])
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{
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// we found a difference, so we need to allocate the array
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ta = new IType[typeArguments.Length];
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for (int j = 0; j < i; j++)
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{
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ta[j] = typeArguments[j];
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}
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}
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if (ta != null)
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ta[i] = r;
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}
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if (ta == null)
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return this;
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else
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return new ParameterizedType(g, ta);
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}
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}
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}
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