letter function

  1. @useResult
Parser<String> letter({
  1. String message = 'letter expected',
})

Returns a parser that accepts any letter character (lowercase or uppercase). The accepted input is equivalent to the character-set a-zA-Z.

Implementation

@useResult
Parser<String> letter({String message = 'letter expected'}) =>
    CharacterParser(const LetterCharPredicate(), message);