source: trunk/HeuristicLab.ExtLibs/HeuristicLab.NRefactory/5.5.0/NRefactory.CSharp-5.5.0/Resolver/ReducedExtensionMethod.cs

//
// ReducedExtensionMethod.cs
//
// Author:
//       Mike Krüger <mkrueger@xamarin.com>
//
// Copyright (c) 2013 Xamarin Inc. (http://xamarin.com)
//
// 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 ICSharpCode.NRefactory.TypeSystem;
using System.Collections.Generic;
using System.Linq;
using ICSharpCode.NRefactory.TypeSystem.Implementation;

namespace ICSharpCode.NRefactory.CSharp
{
  /// <summary>
  /// An invocated extension method hides the extension parameter in its parameter list.
  /// It's used to hide the internals of extension method invocation in certain situation to simulate the
  /// syntactic way of writing extension methods on semantic level.
  /// </summary>
  public class ReducedExtensionMethod : IMethod
  {
    readonly IMethod baseMethod;

    public ReducedExtensionMethod(IMethod baseMethod)
    {
      this.baseMethod = baseMethod;
    }

    public override bool Equals(object obj)
    {
      var other = obj as ReducedExtensionMethod;
      if (other == null)
        return false;
      return baseMethod.Equals(other.baseMethod);
    }
    
    public override int GetHashCode()
    {
      unchecked {
        return baseMethod.GetHashCode() + 1;
      }
    }

    public override string ToString()
    {
      return string.Format("[ReducedExtensionMethod: ReducedFrom={0}]", ReducedFrom);
    }

    #region IMember implementation

    [Serializable]
    public sealed class ReducedExtensionMethodMemberReference : IMemberReference
    {
      readonly IMethod baseMethod;

      public ReducedExtensionMethodMemberReference (IMethod baseMethod)
      {
        this.baseMethod = baseMethod;
      }

      public IMember Resolve(ITypeResolveContext context)
      {
        return new ReducedExtensionMethod ((IMethod)baseMethod.ToReference ().Resolve (context));
      }
      
      ISymbol ISymbolReference.Resolve(ITypeResolveContext context)
      {
        return Resolve(context);
      }

      public ITypeReference DeclaringTypeReference {
        get {
          return baseMethod.ToReference ().DeclaringTypeReference;
        }
      }
    }

    public IMemberReference ToMemberReference()
    {
      return new ReducedExtensionMethodMemberReference (baseMethod);
    }
    
    public IMemberReference ToReference()
    {
      return new ReducedExtensionMethodMemberReference (baseMethod);
    }
    
    ISymbolReference ISymbol.ToReference()
    {
      return ToReference();
    }

    public IMember MemberDefinition {
      get {
        return baseMethod.MemberDefinition;
      }
    }

    public IUnresolvedMember UnresolvedMember {
      get {
        return baseMethod.UnresolvedMember;
      }
    }

    public IType ReturnType {
      get {
        return baseMethod.ReturnType;
      }
    }

    public System.Collections.Generic.IList<IMember> ImplementedInterfaceMembers {
      get {
        return baseMethod.ImplementedInterfaceMembers;
      }
    }

    public bool IsExplicitInterfaceImplementation {
      get {
        return baseMethod.IsExplicitInterfaceImplementation;
      }
    }

    public bool IsVirtual {
      get {
        return baseMethod.IsVirtual;
      }
    }

    public bool IsOverride {
      get {
        return baseMethod.IsOverride;
      }
    }

    public bool IsOverridable {
      get {
        return baseMethod.IsOverridable;
      }
    }

    public TypeParameterSubstitution Substitution {
      get {
        return baseMethod.Substitution;
      }
    }

    public IMethod Specialize(TypeParameterSubstitution substitution)
    {
      return new ReducedExtensionMethod((IMethod)baseMethod.Specialize(substitution));
    }
    
    IMember IMember.Specialize(TypeParameterSubstitution substitution)
    {
      return Specialize(substitution);
    }
    
    public bool IsParameterized {
      get  { return baseMethod.IsParameterized; }
    }

    #endregion

    #region IMethod implementation

    public System.Collections.Generic.IList<IUnresolvedMethod> Parts {
      get {
        return baseMethod.Parts;
      }
    }

    public System.Collections.Generic.IList<IAttribute> ReturnTypeAttributes {
      get {
        return baseMethod.ReturnTypeAttributes;
      }
    }

    public System.Collections.Generic.IList<ITypeParameter> TypeParameters {
      get {
        return baseMethod.TypeParameters;
      }
    }

    public bool IsExtensionMethod {
      get {
        return true;
      }
    }

    public bool IsConstructor {
      get {
        return baseMethod.IsConstructor;
      }
    }

    public bool IsDestructor {
      get {
        return baseMethod.IsDestructor;
      }
    }

    public bool IsOperator {
      get {
        return baseMethod.IsOperator;
      }
    }

    public bool IsPartial {
      get {
        return baseMethod.IsPartial;
      }
    }

    public bool IsAsync {
      get {
        return baseMethod.IsAsync;
      }
    }

    public bool HasBody {
      get {
        return baseMethod.HasBody;
      }
    }

    public bool IsAccessor {
      get {
        return baseMethod.IsAccessor;
      }
    }

    public IMember AccessorOwner {
      get {
        return baseMethod.AccessorOwner;
      }
    }

    public IMethod ReducedFrom {
      get {
        return baseMethod;
      }
    }

    public IList<IType> TypeArguments {
      get {
        return baseMethod.TypeArguments;
      }
    }
    #endregion

    #region IParameterizedMember implementation
    List<IParameter> parameters;
    public System.Collections.Generic.IList<IParameter> Parameters {
      get {
        if (parameters == null)
          parameters = new List<IParameter> (baseMethod.Parameters.Skip (1));
        return parameters;
      }
    }

    #endregion

    #region IEntity implementation

    public SymbolKind SymbolKind {
      get {
        return baseMethod.SymbolKind;
      }
    }

    [Obsolete("Use the SymbolKind property instead.")]
    public EntityType EntityType {
      get {
        return baseMethod.EntityType;
      }
    }
    
    public DomRegion Region {
      get {
        return baseMethod.Region;
      }
    }

    public DomRegion BodyRegion {
      get {
        return baseMethod.BodyRegion;
      }
    }

    public ITypeDefinition DeclaringTypeDefinition {
      get {
        return baseMethod.DeclaringTypeDefinition;
      }
    }

    public IType DeclaringType {
      get {
        return baseMethod.DeclaringType;
      }
    }

    public IAssembly ParentAssembly {
      get {
        return baseMethod.ParentAssembly;
      }
    }

    public System.Collections.Generic.IList<IAttribute> Attributes {
      get {
        return baseMethod.Attributes;
      }
    }

    public ICSharpCode.NRefactory.Documentation.DocumentationComment Documentation {
      get {
        return baseMethod.Documentation;
      }
    }

    public bool IsStatic {
      get {
        return false;
      }
    }

    public bool IsAbstract {
      get {
        return baseMethod.IsAbstract;
      }
    }

    public bool IsSealed {
      get {
        return baseMethod.IsSealed;
      }
    }

    public bool IsShadowing {
      get {
        return baseMethod.IsShadowing;
      }
    }

    public bool IsSynthetic {
      get {
        return baseMethod.IsSynthetic;
      }
    }

    #endregion

    #region IHasAccessibility implementation

    public Accessibility Accessibility {
      get {
        return baseMethod.Accessibility;
      }
    }

    public bool IsPrivate {
      get {
        return baseMethod.IsPrivate;
      }
    }

    public bool IsPublic {
      get {
        return baseMethod.IsPublic;
      }
    }

    public bool IsProtected {
      get {
        return baseMethod.IsProtected;
      }
    }

    public bool IsInternal {
      get {
        return baseMethod.IsInternal;
      }
    }

    public bool IsProtectedOrInternal {
      get {
        return baseMethod.IsProtectedOrInternal;
      }
    }

    public bool IsProtectedAndInternal {
      get {
        return baseMethod.IsProtectedAndInternal;
      }
    }

    #endregion

    #region INamedElement implementation

    public string FullName {
      get {
        return baseMethod.FullName;
      }
    }

    public string Name {
      get {
        return baseMethod.Name;
      }
    }

    public string ReflectionName {
      get {
        return baseMethod.ReflectionName;
      }
    }

    public string Namespace {
      get {
        return baseMethod.Namespace;
      }
    }

    #endregion

    #region ICompilationProvider implementation

    public ICompilation Compilation {
      get {
        return baseMethod.Compilation;
      }
    }

    #endregion
  }
}