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use crate::std::fmt;
use crate::{builder, parser};
#[derive(Clone, Debug, Eq, Hash, PartialEq)]
pub struct Error(Inner);
#[derive(Clone, Debug, Eq, Hash, PartialEq)]
enum Inner {
Build(builder::Error),
Parser(parser::Error),
}
impl From<builder::Error> for Error {
fn from(err: builder::Error) -> Self {
Error(Inner::Build(err))
}
}
impl From<parser::Error> for Error {
fn from(err: parser::Error) -> Self {
Error(Inner::Parser(err))
}
}
impl fmt::Display for Error {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match self.0 {
Inner::Build(ref err) => fmt::Display::fmt(&err, f),
Inner::Parser(ref err) => fmt::Display::fmt(&err, f),
}
}
}
#[cfg(feature = "std")]
mod std_support {
use super::*;
use crate::std::error;
impl error::Error for Error {
fn source(&self) -> Option<&(dyn error::Error + 'static)> {
match self.0 {
Inner::Build(ref err) => Some(err),
Inner::Parser(ref err) => Some(err),
}
}
}
}
#[cfg(test)]
mod test_util {
use super::*;
impl Error {
pub(crate) fn expect_parser(self) -> parser::Error {
match self.0 {
Inner::Parser(err) => err,
_ => panic!("expected a `parser::Error` variant"),
}
}
}
}