+impl ParseError {
+ fn expected(e: &str) -> ParseError {
+ ParseError::Expected(e.into())
+ }
+
+ fn unexpected(e: &str) -> ParseError {
+ ParseError::UnexpectedToken(e.into())
+ }
+}
+
+impl fmt::Display for ParseError {
+ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+ match self {
+ ParseError::UnexpectedToken(it) => f.write_str(it),
+ ParseError::Expected(it) => f.write_str(it),
+ ParseError::InvalidRepeat => f.write_str("invalid repeat"),
+ ParseError::RepetitionEmptyTokenTree => f.write_str("empty token tree in repetition"),
+ }
+ }
+}
+