source: branches/2389-EpsLexicase/HeuristicLab.ExtLibs/HeuristicLab.NRefactory/5.5.0/NRefactory.CSharp-5.5.0/Ast/Expressions/AnonymousMethodExpression.cs

// 
// AnonymousMethodExpression.cs
//
// Author:
//       Mike Krüger <mkrueger@novell.com>
// 
// Copyright (c) 2009 Novell, Inc (http://www.novell.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.Collections.Generic;
using System.Linq;

namespace ICSharpCode.NRefactory.CSharp
{
  /// <summary>
  /// [async] delegate(Parameters) {Body}
  /// </summary>
  public class AnonymousMethodExpression : Expression
  {
    public readonly static TokenRole DelegateKeywordRole = new TokenRole ("delegate");
    public readonly static TokenRole AsyncModifierRole = LambdaExpression.AsyncModifierRole;
    
    bool isAsync;
    
    public bool IsAsync {
      get { return isAsync; }
      set { ThrowIfFrozen(); isAsync = value; }
    }
    
    // used to tell the difference between delegate {} and delegate () {}
    bool hasParameterList;
    
    public bool HasParameterList {
      get { return hasParameterList || Parameters.Any(); }
      set { ThrowIfFrozen(); hasParameterList = value; }
    }
    
    public CSharpTokenNode DelegateToken {
      get { return GetChildByRole (DelegateKeywordRole); }
    }
    
    public CSharpTokenNode LParToken {
      get { return GetChildByRole (Roles.LPar); }
    }
    
    public AstNodeCollection<ParameterDeclaration> Parameters {
      get { return GetChildrenByRole (Roles.Parameter); }
    }
    
    public CSharpTokenNode RParToken {
      get { return GetChildByRole (Roles.RPar); }
    }
    
    public BlockStatement Body {
      get { return GetChildByRole (Roles.Body); }
      set { SetChildByRole (Roles.Body, value); }
    }
    
    public AnonymousMethodExpression ()
    {
    }
    
    public AnonymousMethodExpression (BlockStatement body, IEnumerable<ParameterDeclaration> parameters = null)
    {
      if (parameters != null) {
        hasParameterList = true;
        foreach (var parameter in parameters) {
          AddChild (parameter, Roles.Parameter);
        }
      }
      AddChild (body, Roles.Body);
    }
    
    public AnonymousMethodExpression (BlockStatement body, params ParameterDeclaration[] parameters) : this (body, (IEnumerable<ParameterDeclaration>)parameters)
    {
    }
    
    public override void AcceptVisitor (IAstVisitor visitor)
    {
      visitor.VisitAnonymousMethodExpression (this);
    }
      
    public override T AcceptVisitor<T> (IAstVisitor<T> visitor)
    {
      return visitor.VisitAnonymousMethodExpression (this);
    }
    
    public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
    {
      return visitor.VisitAnonymousMethodExpression (this, data);
    }
    
    protected internal override bool DoMatch(AstNode other, PatternMatching.Match match)
    {
      AnonymousMethodExpression o = other as AnonymousMethodExpression;
      return o != null && this.IsAsync == o.IsAsync && this.HasParameterList == o.HasParameterList
        && this.Parameters.DoMatch(o.Parameters, match) && this.Body.DoMatch(o.Body, match);
    }
  }
}