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| author | Jacob Pratt <jacob@jhpratt.dev> | 2024-07-10 00:37:11 -0400 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2024-07-10 00:37:11 -0400 |
| commit | e71d3d5238cec45bcba55f9d82e066f36ed1a4ed (patch) | |
| tree | b27c17a5b95b11fcb2b1eba1e80709e61ee82b07 | |
| parent | 21a0e862342e197b6740a9c60dfde300e9308b42 (diff) | |
| parent | 90cbd0bfb4dd973b69cbea9509073eba4a33f6ce (diff) | |
| download | rust-e71d3d5238cec45bcba55f9d82e066f36ed1a4ed.tar.gz rust-e71d3d5238cec45bcba55f9d82e066f36ed1a4ed.zip | |
Rollup merge of #127091 - Sky9x:fused-error-sources-iter, r=dtolnay
impl FusedIterator and a size hint for the error sources iter cc tracking issue #58520
| -rw-r--r-- | library/core/src/error.rs | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/library/core/src/error.rs b/library/core/src/error.rs index 150e4f3f318..ca8983d4cbc 100644 --- a/library/core/src/error.rs +++ b/library/core/src/error.rs @@ -1008,8 +1008,15 @@ impl<'a> Iterator for Source<'a> { self.current = self.current.and_then(Error::source); current } + + fn size_hint(&self) -> (usize, Option<usize>) { + if self.current.is_some() { (1, None) } else { (0, Some(0)) } + } } +#[unstable(feature = "error_iter", issue = "58520")] +impl<'a> crate::iter::FusedIterator for Source<'a> {} + #[stable(feature = "error_by_ref", since = "1.51.0")] impl<'a, T: Error + ?Sized> Error for &'a T { #[allow(deprecated, deprecated_in_future)] |