E0081

Warning name: regex_match_missing_after

A non-streaming lexscan pattern can leave an unmatched input suffix, but the pattern does not bind or explicitly ignore that suffix.

For String and StringView inputs, add $ when the match must end with the input, or add after= to bind or ignore the remaining suffix.

Erroneous example

///|
pub fn starts_with_digits(input : String) -> Bool {
  lexscan input {
    re"^[0-9]+" => true
    _ => false
  }
}

Suggestion

Anchor the regex at the end, or make the suffix explicit with after=suffix or after=_.

///|
pub fn starts_with_digits(input : String) -> Bool {
  lexscan input {
    (re"^[0-9]+", after=_) => true
    _ => false
  }
}