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38 lines
1.1 KiB
38 lines
1.1 KiB
1 year ago
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#ifndef _SYSYF_FLEX_LEXER_H_
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#define _SYSYF_FLEX_LEXER_H_
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#ifndef YY_DECL
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#define YY_DECL \
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yy::SysYFParser::symbol_type SysYFFlexLexer::yylex(SysYFDriver& driver)
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#endif
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// We need this for yyFlexLexer. If we don't #undef yyFlexLexer, the
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// preprocessor chokes on the line `#define yyFlexLexer yyFlexLexer`
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// in `FlexLexer.h`:
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#undef yyFlexLexer
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#include <FlexLexer.h>
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// We need this for the yy::SysYFParser::symbol_type:
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#include "SysYFParser.h"
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// We need this for the yy::location type:
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#include "location.hh"
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class SysYFFlexLexer : public yyFlexLexer {
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public:
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// Use the superclass's constructor:
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using yyFlexLexer::yyFlexLexer;
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// Provide the interface to `yylex`; `flex` will emit the
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// definition into `SysYFScanner.cpp`:
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yy::SysYFParser::symbol_type yylex(SysYFDriver& driver);
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// This seems like a reasonable place to put the location object
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// rather than it being static (in the sense of having internal
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// linkage at translation unit scope, not in the sense of being a
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// class variable):
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yy::location loc;
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};
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#endif // _SYSYF_FLEX_LEXER_H_
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