forked from jasder/antlr
94 lines
3.9 KiB
C#
94 lines
3.9 KiB
C#
/*
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* [The "BSD license"]
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* Copyright (c) 2013 Terence Parr
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* Copyright (c) 2013 Sam Harwell
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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using Antlr4.Runtime;
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using Sharpen;
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namespace Antlr4.Runtime
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{
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/// <summary>Bail out of parser at first syntax error.</summary>
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/// <remarks>
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/// Bail out of parser at first syntax error. Do this to use it:
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/// <p/>
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/// <code>myparser.setErrorHandler(new BailErrorStrategy());</code>
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/// </remarks>
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public class BailErrorStrategy : DefaultErrorStrategy
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{
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/// <summary>
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/// Instead of recovering from exception
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/// <code>e</code>
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/// , re-throw it wrapped
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/// in a
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/// <see cref="ParseCanceledException">ParseCanceledException</see>
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/// so it is not caught by the
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/// rule function catches. Use
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/// <see cref="System.Exception.InnerException()">System.Exception.InnerException()</see>
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/// to get the
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/// original
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/// <see cref="RecognitionException">RecognitionException</see>
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/// .
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/// </summary>
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public override void Recover(Parser recognizer, RecognitionException e)
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{
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for (ParserRuleContext context = recognizer.Context; context != null; context = (
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(ParserRuleContext)context.Parent))
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{
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context.exception = e;
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}
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throw new ParseCanceledException(e);
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}
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/// <summary>
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/// Make sure we don't attempt to recover inline; if the parser
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/// successfully recovers, it won't throw an exception.
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/// </summary>
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/// <remarks>
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/// Make sure we don't attempt to recover inline; if the parser
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/// successfully recovers, it won't throw an exception.
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/// </remarks>
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/// <exception cref="Antlr4.Runtime.RecognitionException"></exception>
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public override IToken RecoverInline(Parser recognizer)
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{
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InputMismatchException e = new InputMismatchException(recognizer);
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for (ParserRuleContext context = recognizer.Context; context != null; context = (
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(ParserRuleContext)context.Parent))
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{
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context.exception = e;
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}
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throw new ParseCanceledException(e);
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}
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/// <summary>Make sure we don't attempt to recover from problems in subrules.</summary>
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/// <remarks>Make sure we don't attempt to recover from problems in subrules.</remarks>
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public override void Sync(Parser recognizer)
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{
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}
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}
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}
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