Re: Pattern matches one type of paren but not another

[Hans Åberg]

> On 28 May 2023, at 20:12, Maury Markowitz <maury.markowitz@gmail.com> wrote:
> 
> Following, sort of, some advice I received earlier I modified my bison by 
> adding this:
> 
> open_bracket:
> '(' | '[';
> close_bracket:
> ')' | ']’;

You probably do not want to exchange delimiter types, as in "(…]" and "[…)".

> And then modified the original code thus:
> 
> variable:
> VARIABLE_NAME
> {
>   variable_t *new = malloc(sizeof(*new));
>   new->name = $1;
>   new->subscripts = NULL;
>   new->slicing = NULL;
>   $$ = new;
> }
> |
> VARIABLE_NAME open_bracket exprlist close_bracket
> {
>   variable_t *new = malloc(sizeof(*new));
>   new->name = $1;
>   new->subscripts = $3;
>   new->slicing = NULL;
>   $$ = new;
> }


To exclude that, use:

operator_value:
   VARIABLE_NAME '(' exprlist ')'
 | VARIABLE_NAME '[' exprlist ']'
;

Or more structured (in a C++-like syntax):
operator_value:
   function_value
 | index_value
;

function_value:
  VARIABLE_NAME '(' exprlist ')'
;

index_value:
  VARIABLE_NAME '[' exprlist ']'
;