fail method

ParseError fail({
  1. Token? tok,
  2. String? expected,
  3. String? message,
})

Implementation

ParseError fail({Token? tok, String? expected, String? message}) {
  tok ??= token;
  if (message == null) {
    if (expected != null) {
      message = "Expected $expected but found $tok";
    } else {
      message = "Unexpected token $tok";
    }
  }
  throw ParseError(
      message, filename, tok!.line, tok.startOffset, tok.endOffset);
}