source: branches/CodeEditor/HeuristicLab.ExtLibs/HeuristicLab.NRefactory/5.5.0/NRefactory-5.5.0/TypeSystem/PointerType.cs @ 11700

// Copyright (c) 2010-2013 AlphaSierraPapa for the SharpDevelop Team
// 
// 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 ICSharpCode.NRefactory.TypeSystem.Implementation;

namespace ICSharpCode.NRefactory.TypeSystem
{
  public sealed class PointerType : TypeWithElementType
  {
    public PointerType(IType elementType) : base(elementType)
    {
    }
    
    public override TypeKind Kind {
      get { return TypeKind.Pointer; }
    }
    
    public override string NameSuffix {
      get {
        return "*";
      }
    }
    
    public override bool? IsReferenceType {
      get { return null; }
    }
    
    public override int GetHashCode()
    {
      return elementType.GetHashCode() ^ 91725811;
    }
    
    public override bool Equals(IType other)
    {
      PointerType a = other as PointerType;
      return a != null && elementType.Equals(a.elementType);
    }
    
    public override IType AcceptVisitor(TypeVisitor visitor)
    {
      return visitor.VisitPointerType(this);
    }
    
    public override IType VisitChildren(TypeVisitor visitor)
    {
      IType e = elementType.AcceptVisitor(visitor);
      if (e == elementType)
        return this;
      else
        return new PointerType(e);
    }
    
    public override ITypeReference ToTypeReference()
    {
      return new PointerTypeReference(elementType.ToTypeReference());
    }
  }
  
  [Serializable]
  public sealed class PointerTypeReference : ITypeReference, ISupportsInterning
  {
    readonly ITypeReference elementType;
    
    public PointerTypeReference(ITypeReference elementType)
    {
      if (elementType == null)
        throw new ArgumentNullException("elementType");
      this.elementType = elementType;
    }
    
    public ITypeReference ElementType {
      get { return elementType; }
    }
    
    public IType Resolve(ITypeResolveContext context)
    {
      return new PointerType(elementType.Resolve(context));
    }
    
    public override string ToString()
    {
      return elementType.ToString() + "*";
    }
    
    int ISupportsInterning.GetHashCodeForInterning()
    {
      return elementType.GetHashCode() ^ 91725812;
    }
    
    bool ISupportsInterning.EqualsForInterning(ISupportsInterning other)
    {
      PointerTypeReference o = other as PointerTypeReference;
      return o != null && this.elementType == o.elementType;
    }
  }
}