> +| expr '-' expr
> +{
> + if (!compute_ids || (is_const($1.val) && is_const($3.val))) {
> + assert($1.ids == NULL);
> + assert($3.ids == NULL);
> + $$.val = $1.val - $3.val;
> + $$.ids = NULL;
> + } else {
> + /* LHS and/or RHS need computing from event IDs so union. */
> + $$ = union_expr($1, $3);
> + }Can't this be all in a macro? It's still a lot of duplication. I'm still not a fan, but I think with a macro it wouldn't be too bad. -Andi
