(flex.info.gz) Reentrant Functions

 
 19.5 Functions and Macros Available in Reentrant C Scanners
 ===========================================================
 
 The following Functions are available in a reentrant scanner:
 
 
          char *yyget_text ( yyscan_t scanner );
          int yyget_leng ( yyscan_t scanner );
          FILE *yyget_in ( yyscan_t scanner );
          FILE *yyget_out ( yyscan_t scanner );
          int yyget_lineno ( yyscan_t scanner );
          YY_EXTRA_TYPE yyget_extra ( yyscan_t scanner );
          int  yyget_debug ( yyscan_t scanner );
 
          void yyset_debug ( int flag, yyscan_t scanner );
          void yyset_in  ( FILE * in_str , yyscan_t scanner );
          void yyset_out  ( FILE * out_str , yyscan_t scanner );
          void yyset_lineno ( int line_number , yyscan_t scanner );
          void yyset_extra ( YY_EXTRA_TYPE user_defined , yyscan_t scanner );
 
    There are no "set" functions for yytext and yyleng. This is
 intentional.
 
    The following Macro shortcuts are available in actions in a reentrant
 scanner:
 
 
          yytext
          yyleng
          yyin
          yyout
          yylineno
          yyextra
          yy_flex_debug
 
    In a reentrant C scanner, support for yylineno is always present
 (i.e., you may access yylineno), but the value is never modified by
 `flex' unless `%option yylineno' is enabled. This is to allow the user
 to maintain the line count independently of `flex'.
 
    The following functions and macros are made available when `%option
 bison-bridge' (`--bison-bridge') is specified:
 
 
          YYSTYPE * yyget_lval ( yyscan_t scanner );
          void yyset_lval ( YYSTYPE * yylvalp , yyscan_t scanner );
          yylval
 
    The following functions and macros are made available when `%option
 bison-locations' (`--bison-locations') is specified:
 
 
          YYLTYPE *yyget_lloc ( yyscan_t scanner );
          void yyset_lloc ( YYLTYPE * yyllocp , yyscan_t scanner );
          yylloc
 
    Support for yylval assumes that `YYSTYPE' is a valid type.  Support
 for yylloc assumes that `YYSLYPE' is a valid type.  Typically, these
 types are generated by `bison', and are included in section 1 of the
 `flex' input.
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