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Viewing changes to external/nrefactory/ICSharpCode.NRefactory/PatternMatching/INode.cs

  • Committer: Package Import Robot
  • Author(s): Jo Shields
  • Date: 2013-05-12 09:46:03 UTC
  • mto: This revision was merged to the branch mainline in revision 29.
  • Revision ID: package-import@ubuntu.com-20130512094603-mad323bzcxvmcam0
Tags: upstream-4.0.5+dfsg
Import upstream version 4.0.5+dfsg

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external/nrefactory/ICSharpCode.NRefactory/PatternMatching/INode.cs
 
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// Copyright (c) 2011-2013 AlphaSierraPapa for the SharpDevelop Team
 
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// 
 
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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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// 
 
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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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// 
 
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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 System;
 
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namespace ICSharpCode.NRefactory.PatternMatching
 
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{
 
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        /// <summary>
 
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        /// AST node that supports pattern matching.
 
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        /// </summary>
 
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        public interface INode
 
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        {
 
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                Role Role { get; }
 
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                INode FirstChild { get; }
 
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                INode NextSibling { get; }
 
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                bool IsNull { get; }
 
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                bool DoMatch(INode other, Match match);
 
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                bool DoMatchCollection(Role role, INode pos, Match match, BacktrackingInfo backtrackingInfo);
 
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        }
 
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        public static class PatternExtensions
 
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        {
 
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                /// <summary>
 
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                /// Performs a pattern matching operation.
 
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                /// <c>this</c> is the pattern, <paramref name="other"/> is the AST that is being matched.
 
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                /// </summary>
 
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                /// <returns>
 
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                /// A match object. Check <see cref="PatternMatching.Match.Success"/> to see whether the match was successful.
 
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                /// </returns>
 
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                /// <remarks>
 
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                /// Patterns are ASTs that contain special pattern nodes (from the PatternMatching namespace).
 
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                /// However, it is also possible to match two ASTs without any pattern nodes -
 
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                /// doing so will produce a successful match if the two ASTs are structurally identical.
 
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                /// </remarks>
 
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                public static Match Match(this INode pattern, INode other)
 
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                {
 
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                        if (pattern == null)
 
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                                throw new ArgumentNullException("pattern");
 
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                        Match match = PatternMatching.Match.CreateNew();
 
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                        if (pattern.DoMatch(other, match))
 
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                                return match;
 
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                        else
 
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                                return default(PatternMatching.Match);
 
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                }
 
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                public static bool IsMatch(this INode pattern, INode other)
 
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                {
 
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                        if (pattern == null)
 
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                                throw new ArgumentNullException("pattern");
 
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                        return pattern.DoMatch(other, PatternMatching.Match.CreateNew());
 
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                }
 
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        }
 
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}