anner.
This means that if a rule fails to match, that rule will fail and not try again. The only
backtracking provided in a peg is provided by the <code class="mendoza-code">(choice x y z ...)</code> special, which will
try rules in order until one succeeds, and the whole pattern succeeds. If no sub pattern
succeeds, then the whole pattern fails. Note that this means that the order of <code class="mendoza-code">x y z</code> in choice
DOES matter. If y matches everything that z matches, z will never succeed.