Re: Special token names, or my mistake

[yary]

Thanks! Timo's explanation nailed it, the problem is with the action not
defining a method for "sum" so Any.sum becomes the action.

The parsing works in grammar B without actions; "sum" is fine as a token
name in that case.

grammar B {
  rule TOP { <sum> }
  token sum { <int>+ % '+' }
  token int { \d+ }
}

say B.parse('5');  # OK