src/scanner.h

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// $Id: scanner.h 17 2007-08-19 18:51:39Z tb $

#ifndef EXAMPLE_SCANNER_H
#define EXAMPLE_SCANNER_H

// Flex expects the signature of yylex to be defined in the macro YY_DECL, and
// the C++ parser expects it to be declared. We can factor both as follows.

#ifndef YY_DECL

#define YY_DECL                                         \
    example::Parser::token_type                         \
    example::Scanner::lex(                              \
        example::Parser::semantic_type* yylval,         \
        example::Parser::location_type* yylloc          \
    )
#endif

#ifndef __FLEX_LEXER_H
#define yyFlexLexer ExampleFlexLexer
#include "FlexLexer.h"
#undef yyFlexLexer
#endif

#include "parser.h"

namespace example {

class Scanner : public ExampleFlexLexer
{
public:
    Scanner(std::istream* arg_yyin = 0,
            std::ostream* arg_yyout = 0);

    virtual ~Scanner();

    virtual Parser::token_type lex(
        Parser::semantic_type* yylval,
        Parser::location_type* yylloc
        );

    void set_debug(bool b);
};

} // namespace example

#endif // EXAMPLE_SCANNER_H

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