14 pub struct CustomError(String);  struct
16 impl<'a> From<(&'a str, ErrorKind)> for CustomError {  implementation
18     CustomError(format!("error code was: {:?}", error))  in from()
22 impl<'a> ParseError<&'a str> for CustomError {  implementation
24     CustomError(format!("error code was: {:?}", kind))  in from_error_kind()
27   fn append(_: &'a str, kind: ErrorKind, other: CustomError) -> Self {  in append()
28     CustomError(format!("{:?}\nerror code was: {:?}", other, kind))  in append()
34 fn test1(input: &str) -> IResult<&str, &str, CustomError> {  in test1()  argument
39 fn test2(input: &str) -> IResult<&str, &str, CustomError> {  in test2()  argument
44 fn test3(input: &str) -> IResult<&str, &str, CustomError> {  in test3()  argument
51 fn test4(input: &str) -> IResult<&str, Vec<&str>, CustomError> {  in test4()  argument