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Add .as_str() to str::Chars and str::CharIndices. See #27775.

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This commit is contained in:
Simon Sapin 2015-08-19 17:31:46 +02:00
parent 6f28232756
commit e33650c16f
1 changed files with 24 additions and 0 deletions
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24
src/libcore/str/mod.rs
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@ -292,6 +292,18 @@ impl<'a> DoubleEndedIterator for Chars<'a> {
} }
} }
impl<'a> Chars<'a> {
/// View the underlying data as a subslice of the original data.
///
/// This has the same lifetime as the original slice, and so the
/// iterator can continue to be used while this exists.
#[unstable(feature = "iter_to_slice", issue = "27775")]
#[inline]
pub fn as_str(&self) -> &'a str {
unsafe { from_utf8_unchecked(self.iter.as_slice()) }
}
}
/// Iterator for a string's characters and their byte offsets. /// Iterator for a string's characters and their byte offsets.
#[derive(Clone)] #[derive(Clone)]
#[stable(feature = "rust1", since = "1.0.0")] #[stable(feature = "rust1", since = "1.0.0")]
@ -339,6 +351,18 @@ impl<'a> DoubleEndedIterator for CharIndices<'a> {
} }
} }
impl<'a> CharIndices<'a> {
/// View the underlying data as a subslice of the original data.
///
/// This has the same lifetime as the original slice, and so the
/// iterator can continue to be used while this exists.
#[unstable(feature = "iter_to_slice", issue = "27775")]
#[inline]
pub fn as_str(&self) -> &'a str {
self.iter.as_str()
}
}
/// External iterator for a string's bytes. /// External iterator for a string's bytes.
/// Use with the `std::iter` module. /// Use with the `std::iter` module.
/// ///