Function join

toml/_parser.ts:268–288

Join the parse results of the given parser into an array. * * If the parser fails at the first attempt, it will return an empty array.

(
  parser: ParserComponent<T>,
  separator: string,
)

 * If the parser fails at the first attempt, it will return an empty array.
 */
function join<T>(
  parser: ParserComponent<T>,
  separator: string,
): ParserComponent<T[]> {
  const Separator = character(separator);
  return (scanner: Scanner): ParseResult<T[]> => {
    const out: T[] = [];
    const first = parser(scanner);
    if (!first.ok) return success(out);
    out.push(first.body);
    while (!scanner.eof()) {
      if (!Separator(scanner).ok) break;
      const result = parser(scanner);
      if (!result.ok) {
        throw new SyntaxError(`Invalid token after "${separator}"`);
      }
      out.push(result.body);
    }
    return success(out);
  };
}

/** Join the parse results of the given parser into an array.
 *