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

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// 
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// 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
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using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;

using ICSharpCode.NRefactory.CSharp.Resolver;
using ICSharpCode.NRefactory.Semantics;
using ICSharpCode.NRefactory.TypeSystem;
using ICSharpCode.NRefactory.TypeSystem.Implementation;
using ICSharpCode.NRefactory.Utils;

namespace ICSharpCode.NRefactory.CSharp.TypeSystem
{
  /// <summary>
  /// Represents a simple C# name. (a single non-qualified identifier with an optional list of type arguments)
  /// </summary>
  [Serializable]
  public sealed class SimpleTypeOrNamespaceReference : TypeOrNamespaceReference, ISupportsInterning
  {
    readonly string identifier;
    readonly IList<ITypeReference> typeArguments;
    readonly NameLookupMode lookupMode;
    
    public SimpleTypeOrNamespaceReference(string identifier, IList<ITypeReference> typeArguments, NameLookupMode lookupMode = NameLookupMode.Type)
    {
      if (identifier == null)
        throw new ArgumentNullException("identifier");
      this.identifier = identifier;
      this.typeArguments = typeArguments ?? EmptyList<ITypeReference>.Instance;
      this.lookupMode = lookupMode;
    }
    
    public string Identifier {
      get { return identifier; }
    }
    
    public IList<ITypeReference> TypeArguments {
      get { return typeArguments; }
    }
    
    public NameLookupMode LookupMode {
      get { return lookupMode; }
    }
    
    /// <summary>
    /// Adds a suffix to the identifier.
    /// Does not modify the existing type reference, but returns a new one.
    /// </summary>
    public SimpleTypeOrNamespaceReference AddSuffix(string suffix)
    {
      return new SimpleTypeOrNamespaceReference(identifier + suffix, typeArguments, lookupMode);
    }
    
    public override ResolveResult Resolve(CSharpResolver resolver)
    {
      var typeArgs = typeArguments.Resolve(resolver.CurrentTypeResolveContext);
      return resolver.LookupSimpleNameOrTypeName(identifier, typeArgs, lookupMode);
    }
    
    public override IType ResolveType(CSharpResolver resolver)
    {
      TypeResolveResult trr = Resolve(resolver) as TypeResolveResult;
      return trr != null ? trr.Type : new UnknownType(null, identifier, typeArguments.Count);
    }
    
    public override string ToString()
    {
      if (typeArguments.Count == 0)
        return identifier;
      else
        return identifier + "<" + string.Join(",", typeArguments) + ">";
    }
    
    int ISupportsInterning.GetHashCodeForInterning()
    {
      int hashCode = 0;
      unchecked {
        hashCode += 1000000021 * identifier.GetHashCode();
        hashCode += 1000000033 * typeArguments.GetHashCode();
        hashCode += 1000000087 * (int)lookupMode;
      }
      return hashCode;
    }
    
    bool ISupportsInterning.EqualsForInterning(ISupportsInterning other)
    {
      SimpleTypeOrNamespaceReference o = other as SimpleTypeOrNamespaceReference;
      return o != null && this.identifier == o.identifier
        && this.typeArguments == o.typeArguments && this.lookupMode == o.lookupMode;
    }
  }
}