source: stable/HeuristicLab.ExtLibs/HeuristicLab.NRefactory/5.5.0/NRefactory.CSharp-5.5.0/Ast/Expressions/ParenthesizedExpression.cs @ 18242

// 
// ParenthesizedExpression.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.

namespace ICSharpCode.NRefactory.CSharp
{
  /// <summary>
  /// ( Expression )
  /// </summary>
  public class ParenthesizedExpression : Expression
  {
    public CSharpTokenNode LParToken {
      get { return GetChildByRole (Roles.LPar); }
    }
    
    public Expression Expression {
      get { return GetChildByRole (Roles.Expression); }
      set { SetChildByRole (Roles.Expression, value); }
    }
    
    public CSharpTokenNode RParToken {
      get { return GetChildByRole (Roles.RPar); }
    }
    
    public ParenthesizedExpression()
    {
    }
    
    public ParenthesizedExpression(Expression expr)
    {
      Expression = expr;
    }
    
    public override void AcceptVisitor (IAstVisitor visitor)
    {
      visitor.VisitParenthesizedExpression (this);
    }
      
    public override T AcceptVisitor<T> (IAstVisitor<T> visitor)
    {
      return visitor.VisitParenthesizedExpression (this);
    }
    
    public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
    {
      return visitor.VisitParenthesizedExpression (this, data);
    }
    
    protected internal override bool DoMatch(AstNode other, PatternMatching.Match match)
    {
      ParenthesizedExpression o = other as ParenthesizedExpression;
      return o != null && this.Expression.DoMatch(o.Expression, match);
    }
    
    /// <summary>
    /// Gets whether the expression acts like a parenthesized expression,
    /// i.e. whether information about the expected type (for lambda type inference) flows
    /// into the inner expression.
    /// </summary>
    /// <returns>Returns true for ParenthesizedExpression, CheckedExpression or UncheckedExpression; false otherwise.</returns>
    public static bool ActsAsParenthesizedExpression(AstNode expression)
    {
      return expression is ParenthesizedExpression || expression is CheckedExpression || expression is UncheckedExpression;
    }
    
    /// <summary>
    /// Unpacks the given expression if it is a ParenthesizedExpression, CheckedExpression or UncheckedExpression.
    /// </summary>
    public static Expression UnpackParenthesizedExpression(Expression expr)
    {
      while (ActsAsParenthesizedExpression(expr))
        expr = expr.GetChildByRole(Roles.Expression);
      return expr;
    }
  }
}