Given:
rule cmp_expression {
| <str_const> <cmp_op> <identifier>
| <num_const> <cmp_op> <identifier>
| ...
}
What is a good, concise way to express that all the alternatives are
commutative?
I imagine that generally this is a useless question, which is
avoided by:
rule cmp_expression {
<value_expression> <cmp_op> <value_expression>
}
but here many tokens under value_expression exist but are not well
defined, nor known by me.
rir
