package parser type ParseError struct { Type ParseErrorType Message string Raw string } type ParseErrorType string const ( ErrInvalidPrefix ParseErrorType = "invalid url prefix" ErrInvalidStruct ParseErrorType = "invalid struct" ErrInvalidPort ParseErrorType = "invalid port number" ) func (e *ParseError) Error() string { if e.Message != "" { return string(e.Type) + ": " + e.Message + " \"" + e.Raw + "\"" } return string(e.Type) }