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/* $Id: lemonflex-head.inc 11400 2004-07-18 00:24:25Z guy $ */
/* This file is #include'd at the top of a Lex/Flex scanner
for use with the Lemon parser. You must have #define'd:
LVAL name of lval variable
LVAL_TYPE type of lval variable
LVAL_INIT_VAL Initial value of lval variable
*/
/* Flex has a few routines which help us get the scanner to read
* from a string rather than from a file. POSIX lex only provides
* for reading from a file; any method of reading from a string
* is inherently non-portable. Besides reading from a string,
* we have to worry about resetting the scanner after a bad
* parse; this too is non-portable. Combine the reset with
* a string input, and you have major non-portability. I'll provide
* the routines for flex here. If you really want to modify the
* scanner and use a non-flex lex implementation, you may
* add more ifdef's below.
*/
/* If we don't need yyunput, use this macro to get it out of the
* generated C file, avoiding a compiler warning about its lack of use */
#define YY_NO_UNPUT 1
/* Yup, I'm using a non-standard type for lval, unlike usual lex/yacc implementations.
* I can do so because I'm *not* using yacc, I'm using Lemon, where I have
* more control of the interaction between scanner and parser. */
LVAL_TYPE LVAL = LVAL_INIT_VAL;
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