So you want to add a modulus operator correct? (I thought it existed but I was
wrong) To do that is pretty straight forward you have to edit one file and
recompile:
- mapparser.y -> this is the Bison/YACC parser grammar, the '%' operator
needs to be added to the section that defines operator precedence, and down in
the math_exp syntax session
I don't have my reference manual handy but looking through a perl manual I see
the '%' operator at the same level as '*' and '/' so in the precedence section.
So you can change the line:
%left '*' '/'
to
%left '*' '/' '%'
and change:
| math_exp '*' math_exp { $$ = $1 * $3; }
to
| math_exp '*' math_exp { $$ = $1 * $3; }
| math_exp '%' math_exp { $$ = $1 % $3; }
or something close to this. Lemme know if it works and I'll patch 4.8 and 4.9.
Steve
>>> Charlton Purvis <[EMAIL PROTECTED]> 01/27/06 12:04 PM >>>
Hi, folks:
I'd like to modify the filter to execute modulus in addition to everything
it already does (http://mapserver.gis.umn.edu/docs/howto/msexpressions).
I'm looking through the code right now, but if somebody knows off the top of
their head where to point me, that would be great.
Thanks,
Charlton
