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feat: remove ChainErrorFrom and IntoChainError, add From

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ChainErrorFrom and IntoChainError are not needed anymore with the
`#[track_caller]` feature.

Now, a proper `From<T> for ChainError<T>` can be implemented.
This commit is contained in:
Harald Hoyer 2021-02-02 15:36:43 +01:00 committed by Harald Hoyer
parent bdfec08228
commit f5c8afce0d
Signed by: harald
GPG key ID: 900F3C4971086004
1 changed files with 5 additions and 29 deletions
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34
src/lib.rs
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@ -636,40 +636,16 @@ impl<T: 'static + Display + Debug> Debug for ChainError<T> {
}
}
/// `ChainErrorFrom<T>` is similar to `From<T>`
pub trait ChainErrorFrom<T>: Sized {
/// similar to From<T>::from()
fn chain_error_from(from: T, line_filename: Option<String>) -> ChainError<Self>;
}
/// `IntoChainError<T>` is similar to `Into<T>`
pub trait IntoChainError<T>: Sized {
/// similar to Into<T>::into()
fn into_chain_error(self, line_filename: Option<String>) -> ChainError<T>;
}
impl<T, U> IntoChainError<U> for T
impl<T> From<T> for ChainError<T>
where
U: ChainErrorFrom<T>,
T: 'static + Display + Debug,
{
#[track_caller]
#[inline]
fn into_chain_error(self, line_filename: Option<String>) -> ChainError<U> {
U::chain_error_from(self, line_filename)
fn from(e: T) -> ChainError<T> {
ChainError::new(e, None, Some(Location::caller().to_string()))
}
}
impl<T, U> ChainErrorFrom<T> for U
where
T: Into<U>,
U: 'static + Display + Debug,
{
#[inline]
fn chain_error_from(t: T, line_filename: Option<String>) -> ChainError<Self> {
let e: U = t.into();
ChainError::new(e, None, line_filename)
}
}
/// Convenience macro to create a "new type" T(String) and implement Display + Debug for T
///
/// # Examples