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// Copyright (c) AlphaSierraPapa for the SharpDevelop Team
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// Permission is hereby granted, free of charge, to any person obtaining a copy of this
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// software and associated documentation files (the "Software"), to deal in the Software
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// without restriction, including without limitation the rights to use, copy, modify, merge,
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// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
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// to whom the Software is furnished to do so, subject to the following conditions:
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// The above copyright notice and this permission notice shall be included in all copies or
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// substantial portions of the Software.
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
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// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
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// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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using ICSharpCode.NRefactory.PatternMatching;
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namespace ICSharpCode.NRefactory.CSharp
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/// Matches identifier expressions that have the same identifier as the referenced variable/type definition/method definition.
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public class IdentifierExpressionBackreference : Pattern
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readonly string referencedGroupName;
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public string ReferencedGroupName {
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get { return referencedGroupName; }
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public IdentifierExpressionBackreference(string referencedGroupName)
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if (referencedGroupName == null)
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throw new ArgumentNullException("referencedGroupName");
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this.referencedGroupName = referencedGroupName;
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public override bool DoMatch(INode other, Match match)
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CSharp.IdentifierExpression ident = other as CSharp.IdentifierExpression;
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if (ident == null || ident.TypeArguments.Any())
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CSharp.AstNode referenced = (CSharp.AstNode)match.Get(referencedGroupName).Last();
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if (referenced == null)
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return ident.Identifier == referenced.GetChildByRole(CSharp.Roles.Identifier).Name;