diff options
Diffstat (limited to 'src/unexpected.rs')
| -rw-r--r-- | src/unexpected.rs | 37 |
1 files changed, 30 insertions, 7 deletions
diff --git a/src/unexpected.rs b/src/unexpected.rs index 18d0a22..01ec82f 100644 --- a/src/unexpected.rs +++ b/src/unexpected.rs @@ -57,7 +57,7 @@ impl RawUnexpected { /// ``` /// use exun::*; /// - /// let err = RawUnexpected::new(core::fmt::Error); + /// let x = RawUnexpected::new(core::fmt::Error); /// ``` #[cfg(feature = "std")] pub fn new<E: Error + Send + Sync + 'static>(e: E) -> Self { @@ -78,13 +78,40 @@ impl RawUnexpected { /// ``` /// use exun::*; /// - /// let err = UnexpectedError::msg("failed"); + /// let x = UnexpectedError::msg("failed"); /// ``` pub fn msg<E: Display + Debug + Send + Sync + 'static>(e: E) -> Self { Self { internal: ErrorTy::Message(Box::new(e)), } } + + /// Get the original error. + /// + /// This will return `None` if `self` was created using + /// [`RawUnexpected::msg`]. + /// + /// # Examples + /// + /// Basic usage: + /// + /// ``` + /// use exun::*; + /// + /// let x = RawUnexpected::new(core::fmt::Error); + /// assert!(err.source().is_some()); + /// + /// let x = RawUnexpected::msg("failed"); + /// assert!(err.source().is_none()); + /// ``` + #[must_use] + pub fn source(&self) -> Option<&(dyn Error + 'static)> { + match &self.internal { + ErrorTy::Message(m) => None, + #[cfg(feature = "std")] + ErrorTy::Error(e) => Some(&**e), + } + } } /// An error that isn't expected to occur. @@ -109,10 +136,6 @@ impl Display for UnexpectedError { #[cfg(feature = "std")] impl Error for UnexpectedError { fn source(&self) -> Option<&(dyn Error + 'static)> { - match &self.0.internal { - ErrorTy::Message(_) => None, - #[cfg(feature = "std")] - ErrorTy::Error(e) => Some(&**e), - } + self.0.source() } } |