1 /* Copyright (c) 2012-2017 The ANTLR Project. All rights reserved.
2  * Use of this file is governed by the BSD 3-clause license that
3  * can be found in the LICENSE.txt file in the project root.
4  */
5 
6 #pragma once
7 
8 #include "RecognitionException.h"
9 #include "atn/ATNConfigSet.h"
10 
11 namespace antlr4 {
12 
13   class ANTLR4CPP_PUBLIC LexerNoViableAltException : public RecognitionException {
14   public:
15     LexerNoViableAltException(Lexer *lexer, CharStream *input, size_t startIndex,
16                               atn::ATNConfigSet *deadEndConfigs);
17 
18     virtual size_t getStartIndex();
19     virtual atn::ATNConfigSet* getDeadEndConfigs();
20     virtual std::string toString();
21 
22   private:
23     /// Matching attempted at what input index?
24     const size_t _startIndex;
25 
26     /// Which configurations did we try at input.index() that couldn't match input.LA(1)?
27     atn::ATNConfigSet *_deadEndConfigs;
28 
29   };
30 
31 } // namespace antlr4
32