source: stable/HeuristicLab.ExtLibs/HeuristicLab.NRefactory/5.5.0/NRefactory.CSharp-5.5.0/Ast/Statements/TryCatchStatement.cs

// 
// TryCatchStatement.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>
  /// try TryBlock CatchClauses finally FinallyBlock
  /// </summary>
  public class TryCatchStatement : Statement
  {
    public static readonly TokenRole TryKeywordRole = new TokenRole ("try");
    public static readonly Role<BlockStatement> TryBlockRole = new Role<BlockStatement>("TryBlock", BlockStatement.Null);
    public static readonly Role<CatchClause> CatchClauseRole = new Role<CatchClause>("CatchClause", CatchClause.Null);
    public static readonly TokenRole FinallyKeywordRole = new TokenRole ("finally");
    public static readonly Role<BlockStatement> FinallyBlockRole = new Role<BlockStatement>("FinallyBlock", BlockStatement.Null);
    
    public CSharpTokenNode TryToken {
      get { return GetChildByRole (TryKeywordRole); }
    }
    
    public BlockStatement TryBlock {
      get { return GetChildByRole (TryBlockRole); }
      set { SetChildByRole (TryBlockRole, value); }
    }
    
    public AstNodeCollection<CatchClause> CatchClauses {
      get { return GetChildrenByRole (CatchClauseRole); }
    }
    
    public CSharpTokenNode FinallyToken {
      get { return GetChildByRole (FinallyKeywordRole); }
    }
    
    public BlockStatement FinallyBlock {
      get { return GetChildByRole (FinallyBlockRole); }
      set { SetChildByRole (FinallyBlockRole, value); }
    }
    
    public override void AcceptVisitor (IAstVisitor visitor)
    {
      visitor.VisitTryCatchStatement (this);
    }
      
    public override T AcceptVisitor<T> (IAstVisitor<T> visitor)
    {
      return visitor.VisitTryCatchStatement (this);
    }
    
    public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
    {
      return visitor.VisitTryCatchStatement (this, data);
    }
    
    protected internal override bool DoMatch(AstNode other, PatternMatching.Match match)
    {
      TryCatchStatement o = other as TryCatchStatement;
      return o != null && this.TryBlock.DoMatch(o.TryBlock, match) && this.CatchClauses.DoMatch(o.CatchClauses, match) && this.FinallyBlock.DoMatch(o.FinallyBlock, match);
    }
  }
  
  /// <summary>
  /// catch (Type VariableName) { Body }
  /// </summary>
  public class CatchClause : AstNode
  {
    public static readonly TokenRole CatchKeywordRole = new TokenRole ("catch");

    #region Null
    public new static readonly CatchClause Null = new NullCatchClause ();
    
    sealed class NullCatchClause : CatchClause
    {
      public override bool IsNull {
        get {
          return true;
        }
      }
      
      public override void AcceptVisitor (IAstVisitor visitor)
      {
        visitor.VisitNullNode(this);
      }
      
      public override T AcceptVisitor<T> (IAstVisitor<T> visitor)
      {
        return visitor.VisitNullNode(this);
      }
      
      public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
      {
        return visitor.VisitNullNode(this, data);
      }
      
      protected internal override bool DoMatch(AstNode other, PatternMatching.Match match)
      {
        return other == null || other.IsNull;
      }
    }
    #endregion

    #region PatternPlaceholder
    public static implicit operator CatchClause(PatternMatching.Pattern pattern)
    {
      return pattern != null ? new PatternPlaceholder(pattern) : null;
    }
    
    sealed class PatternPlaceholder : CatchClause, PatternMatching.INode
    {
      readonly PatternMatching.Pattern child;
      
      public PatternPlaceholder(PatternMatching.Pattern child)
      {
        this.child = child;
      }
      
      public override NodeType NodeType {
        get { return NodeType.Pattern; }
      }
      
      public override void AcceptVisitor (IAstVisitor visitor)
      {
        visitor.VisitPatternPlaceholder(this, child);
      }
        
      public override T AcceptVisitor<T> (IAstVisitor<T> visitor)
      {
        return visitor.VisitPatternPlaceholder(this, child);
      }

      public override S AcceptVisitor<T, S>(IAstVisitor<T, S> visitor, T data)
      {
        return visitor.VisitPatternPlaceholder(this, child, data);
      }
      
      protected internal override bool DoMatch(AstNode other, PatternMatching.Match match)
      {
        return child.DoMatch(other, match);
      }
      
      bool PatternMatching.INode.DoMatchCollection(Role role, PatternMatching.INode pos, PatternMatching.Match match, PatternMatching.BacktrackingInfo backtrackingInfo)
      {
        return child.DoMatchCollection(role, pos, match, backtrackingInfo);
      }
    }
    #endregion
    
    public override NodeType NodeType {
      get {
        return NodeType.Unknown;
      }
    }
    
    public CSharpTokenNode CatchToken {
      get { return GetChildByRole (CatchKeywordRole); }
    }
    
    public CSharpTokenNode LParToken {
      get { return GetChildByRole (Roles.LPar); }
    }
    
    public AstType Type {
      get { return GetChildByRole (Roles.Type); }
      set { SetChildByRole (Roles.Type, value); }
    }
    
    public string VariableName {
      get { return GetChildByRole (Roles.Identifier).Name; }
      set {
        if (string.IsNullOrEmpty(value))
          SetChildByRole (Roles.Identifier, null);
        else
          SetChildByRole (Roles.Identifier, Identifier.Create (value));
      }
    }
    
    public Identifier VariableNameToken {
      get {
        return GetChildByRole (Roles.Identifier);
      }
      set {
        SetChildByRole(Roles.Identifier, value);
      }
    }
    
    public CSharpTokenNode RParToken {
      get { return GetChildByRole (Roles.RPar); }
    }
    
    public BlockStatement Body {
      get { return GetChildByRole (Roles.Body); }
      set { SetChildByRole (Roles.Body, value); }
    }
    
    public override void AcceptVisitor (IAstVisitor visitor)
    {
      visitor.VisitCatchClause (this);
    }
      
    public override T AcceptVisitor<T> (IAstVisitor<T> visitor)
    {
      return visitor.VisitCatchClause (this);
    }
    
    public override S AcceptVisitor<T, S> (IAstVisitor<T, S> visitor, T data)
    {
      return visitor.VisitCatchClause (this, data);
    }
    
    protected internal override bool DoMatch(AstNode other, PatternMatching.Match match)
    {
      CatchClause o = other as CatchClause;
      return o != null && this.Type.DoMatch(o.Type, match) && MatchString(this.VariableName, o.VariableName) && this.Body.DoMatch(o.Body, match);
    }
  }
}