Le 9 juin 2010 à 03:39, Zona Walcott a écrit :
> I have specified 2 parameters for parse-param as:
> %parse-param {void* scan_info, PNode *pp }
> %lex-param {void *scan_info}
This is incorrect. Use %parse-param several times, once for each argument.
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If you use a reentrant parser, you can optionally pass additional
parameter information to it in a reentrant way. To do so, use the
declaration `%parse-param':
-- Directive: %parse-param {ARGUMENT-DECLARATION}
Declare that an argument declared by the braced-code
ARGUMENT-DECLARATION is an additional `yyparse' argument. The
ARGUMENT-DECLARATION is used when declaring functions or
prototypes. The last identifier in ARGUMENT-DECLARATION must be
the argument name.
Here's an example. Write this in the parser:
%parse-param {int *nastiness}
%parse-param {int *randomness}
Then call the parser like this:
{
int nastiness, randomness;
... /* Store proper data in `nastiness' and `randomness'. */
value = yyparse (&nastiness, &randomness);
...
}
