Type Definition nom::IResult

type IResult<I, O, E = u32> = Result<(I, O), Err<I, E>>;

Holds the result of parsing functions

It depends on I, the input type, O, the output type, and E, the error type (by default u32)

The Ok side is an enum containing the remainder of the input (the part of the data that was not parsed) and the produced value. The Err side contains an instance of nom::Err.