source: branches/CodeEditor/HeuristicLab.ExtLibs/HeuristicLab.NRefactory/5.5.0/NRefactory-5.5.0/TypeSystem/TopLevelTypeName.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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// DEALINGS IN THE SOFTWARE.

using System;
using System.Collections.Generic;
using System.Text;

namespace ICSharpCode.NRefactory.TypeSystem
{
  /// <summary>
  /// Holds the name of a top-level type.
  /// This struct cannot refer to nested classes.
  /// </summary>
  [Serializable]
  public struct TopLevelTypeName : IEquatable<TopLevelTypeName>
  {
    readonly string namespaceName;
    readonly string name;
    readonly int typeParameterCount;
    
    public TopLevelTypeName(string namespaceName, string name, int typeParameterCount = 0)
    {
      if (namespaceName == null)
        throw new ArgumentNullException("namespaceName");
      if (name == null)
        throw new ArgumentNullException("name");
      this.namespaceName = namespaceName;
      this.name = name;
      this.typeParameterCount = typeParameterCount;
    }
    
    public TopLevelTypeName(string reflectionName)
    {
      int pos = reflectionName.LastIndexOf('.');
      if (pos < 0) {
        namespaceName = string.Empty;
        name = reflectionName;
      } else {
        namespaceName = reflectionName.Substring(0, pos);
        name = reflectionName.Substring(pos + 1);
      }
      name = ReflectionHelper.SplitTypeParameterCountFromReflectionName(name, out typeParameterCount);
    }
    
    public string Namespace {
      get { return namespaceName; }
    }
    
    public string Name {
      get { return name; }
    }
    
    public int TypeParameterCount {
      get { return typeParameterCount; }
    }
    
    public string ReflectionName {
      get {
        StringBuilder b = new StringBuilder();
        if (!string.IsNullOrEmpty(namespaceName)) {
          b.Append(namespaceName);
          b.Append('.');
        }
        b.Append(name);
        if (typeParameterCount > 0) {
          b.Append('`');
          b.Append(typeParameterCount);
        }
        return b.ToString();
      }
    }
    
    public override string ToString()
    {
      return this.ReflectionName;
    }
    
    public override bool Equals(object obj)
    {
      return (obj is TopLevelTypeName) && Equals((TopLevelTypeName)obj);
    }
    
    public bool Equals(TopLevelTypeName other)
    {
      return this.namespaceName == other.namespaceName && this.name == other.name && this.typeParameterCount == other.typeParameterCount;
    }
    
    public override int GetHashCode()
    {
      return (name != null ? name.GetHashCode() : 0) ^ (namespaceName != null ? namespaceName.GetHashCode() : 0) ^ typeParameterCount;
    }
    
    public static bool operator ==(TopLevelTypeName lhs, TopLevelTypeName rhs)
    {
      return lhs.Equals(rhs);
    }
    
    public static bool operator !=(TopLevelTypeName lhs, TopLevelTypeName rhs)
    {
      return !lhs.Equals(rhs);
    }
  }
  
  [Serializable]
  public sealed class TopLevelTypeNameComparer : IEqualityComparer<TopLevelTypeName>
  {
    public static readonly TopLevelTypeNameComparer Ordinal = new TopLevelTypeNameComparer(StringComparer.Ordinal);
    public static readonly TopLevelTypeNameComparer OrdinalIgnoreCase = new TopLevelTypeNameComparer(StringComparer.OrdinalIgnoreCase);
    
    public readonly StringComparer NameComparer;
    
    public TopLevelTypeNameComparer(StringComparer nameComparer)
    {
      this.NameComparer = nameComparer;
    }
    
    public bool Equals(TopLevelTypeName x, TopLevelTypeName y)
    {
      return x.TypeParameterCount == y.TypeParameterCount
        && NameComparer.Equals(x.Name, y.Name)
        && NameComparer.Equals(x.Namespace, y.Namespace);
    }
    
    public int GetHashCode(TopLevelTypeName obj)
    {
      return NameComparer.GetHashCode(obj.Name) ^ NameComparer.GetHashCode(obj.Namespace) ^ obj.TypeParameterCount;
    }
  }
}