Function isAlphaNumeric

deps/v8/test/intl/assert.js:224–228

(code)

  function charCode(char) { return char.charCodeAt(0); }
  function isAlphaNumeric(code) {
    return (charCode("0") <= code && code <= charCode("9")) ||
           (charCode("A") <= code && code <= charCode("Z")) ||
           (charCode("a") <= code && code <= charCode("z"));
  }

  const MATCH_SUBTAG = 0;
  const MATCH_SINGLETON_OR_SUBTAG = 1;