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use std::{io, result};
use thiserror::Error;
use crate::{codegen, interpreter, parser, tc};
#[derive(Error, Debug)]
pub enum Error {
#[error(transparent)]
IOError(#[from] io::Error),
#[error("Error parsing input: {0}")]
ParseError(#[from] parser::Error),
#[error("Error evaluating expression: {0}")]
EvalError(#[from] interpreter::Error),
#[error("Compile error: {0}")]
CodegenError(#[from] codegen::Error),
#[error("Type error: {0}")]
TypeError(#[from] tc::Error),
#[error("{0}")]
Message(String),
}
impl From<String> for Error {
fn from(s: String) -> Self {
Self::Message(s)
}
}
impl<'a> From<&'a str> for Error {
fn from(s: &'a str) -> Self {
Self::Message(s.to_owned())
}
}
impl<'a> From<nom::Err<nom::error::Error<&'a str>>> for Error {
fn from(e: nom::Err<nom::error::Error<&'a str>>) -> Self {
use nom::error::Error as NomError;
use nom::Err::*;
Self::ParseError(match e {
Incomplete(i) => Incomplete(i),
Error(NomError { input, code }) => Error(NomError {
input: input.to_owned(),
code,
}),
Failure(NomError { input, code }) => Failure(NomError {
input: input.to_owned(),
code,
}),
})
}
}
pub type Result<T> = result::Result<T, Error>;
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