organic/src/error/error.rs

use nom::error::ErrorKind;
use nom::error::ParseError;
use nom::IResult;

pub(crate) type Res<T, U> = IResult<T, U, CustomError<T>>;

#[derive(Debug)]
pub enum CustomError<I> {
    MyError(MyError<&'static str>),
    Nom(I, ErrorKind),
    IO(std::io::Error),
    BoxedError(Box<dyn std::error::Error>),
}

#[derive(Debug)]
pub struct MyError<I>(pub(crate) I);

impl<I> ParseError<I> for CustomError<I> {
    fn from_error_kind(input: I, kind: ErrorKind) -> Self {
        CustomError::Nom(input, kind)
    }

    fn append(_input: I, _kind: ErrorKind, /*mut*/ other: Self) -> Self {
        // Doesn't do append like VerboseError
        other
    }
}

impl<I> From<std::io::Error> for CustomError<I> {
    fn from(value: std::io::Error) -> Self {
        CustomError::IO(value)
    }
}

impl<I> From<&'static str> for CustomError<I> {
    fn from(value: &'static str) -> Self {
        CustomError::MyError(MyError(value))
    }
}

impl<I> From<Box<dyn std::error::Error>> for CustomError<I> {
    fn from(value: Box<dyn std::error::Error>) -> Self {
        CustomError::BoxedError(value)
    }
}