ometa Zmick <: Parser {
 all = (a | b | c)*,
 a = "a" -> 'and',
 b = "b" -> 'brb',
 c = "c" -> 'call'
}

tree = Zmick.matchAll("abc", "all") //[and, brb, call]

ometa interp{
  expr = ['and']  -> alert('and')
         |['brb'] -> alert('brb')
         | ['call'] -> alert(call)
}

interp.matchAll(tree, "expr")