source: branches/CodeEditor/HeuristicLab.ExtLibs/HeuristicLab.NRefactory/5.5.0/NRefactory-5.5.0/TypeSystem/Implementation/UnknownType.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
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using System;
using System.Diagnostics;

namespace ICSharpCode.NRefactory.TypeSystem.Implementation
{
  /// <summary>
  /// An unknown type where (part) of the name is known.
  /// </summary>
  [Serializable]
  public class UnknownType : AbstractType, ITypeReference
  {
    readonly bool namespaceKnown;
    readonly FullTypeName fullTypeName;
    
    /// <summary>
    /// Creates a new unknown type.
    /// </summary>
    /// <param name="namespaceName">Namespace name, if known. Can be null if unknown.</param>
    /// <param name="name">Name of the type, must not be null.</param>
    /// <param name="typeParameterCount">Type parameter count, zero if unknown.</param>
    public UnknownType(string namespaceName, string name, int typeParameterCount = 0)
    {
      if (name == null)
        throw new ArgumentNullException("name");
      this.namespaceKnown = namespaceName != null;
      this.fullTypeName = new TopLevelTypeName(namespaceName ?? string.Empty, name, typeParameterCount);
    }
    
    /// <summary>
    /// Creates a new unknown type.
    /// </summary>
    /// <param name="fullTypeName">Full name of the unknown type.</param>
    public UnknownType(FullTypeName fullTypeName)
    {
      if (fullTypeName.Name == null) {
        Debug.Assert(fullTypeName == default(FullTypeName));
        this.namespaceKnown = false;
        this.fullTypeName = new TopLevelTypeName(string.Empty, "?", 0);
      } else {
        this.namespaceKnown = true;
        this.fullTypeName = fullTypeName;
      }
    }
    
    public override TypeKind Kind {
      get { return TypeKind.Unknown; }
    }
    
    public override ITypeReference ToTypeReference()
    {
      return this;
    }
    
    IType ITypeReference.Resolve(ITypeResolveContext context)
    {
      if (context == null)
        throw new ArgumentNullException("context");
      return this;
    }
    
    public override string Name {
      get { return fullTypeName.Name; }
    }
    
    public override string Namespace {
      get { return fullTypeName.TopLevelTypeName.Namespace; }
    }
    
    public override string ReflectionName {
      get { return namespaceKnown ? fullTypeName.ReflectionName : "?"; }
    }
    
    public override int TypeParameterCount {
      get { return fullTypeName.TypeParameterCount; }
    }
    
    public override bool? IsReferenceType {
      get { return null; }
    }
    
    public override int GetHashCode()
    {
      return (namespaceKnown ? 812571 : 12651) ^ fullTypeName.GetHashCode();
    }
    
    public override bool Equals(IType other)
    {
      UnknownType o = other as UnknownType;
      if (o == null)
        return false;
      return this.namespaceKnown == o.namespaceKnown && this.fullTypeName == o.fullTypeName;
    }
    
    public override string ToString()
    {
      return "[UnknownType " + fullTypeName.ReflectionName + "]";
    }
  }
}