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Rollup merge of #63421 - clarfon:escape_default, r=dtolnay

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Implement Clone, Display for ascii::EscapeDefault

This will mimic the same behaviour as the `char` version; `Display`ing the iterator will give its string representation without advancing it.
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Mazdak Farrokhzad 2019-08-14 04:18:39 +02:00 • committed by GitHub
commit b5df4bb7eb
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1 changed files with 9 additions and 0 deletions
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9
src/libcore/ascii.rs
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@ -14,6 +14,7 @@
use crate::fmt;
use crate::ops::Range;
use crate::iter::FusedIterator;
use crate::str::from_utf8_unchecked;
/// An iterator over the escaped version of a byte.
///
@ -22,6 +23,7 @@ use crate::iter::FusedIterator;
///
/// [`escape_default`]: fn.escape_default.html
#[stable(feature = "rust1", since = "1.0.0")]
#[derive(Clone)]
pub struct EscapeDefault {
range: Range<usize>,
data: [u8; 4],
@ -130,6 +132,13 @@ impl ExactSizeIterator for EscapeDefault {}
#[stable(feature = "fused", since = "1.26.0")]
impl FusedIterator for EscapeDefault {}
#[stable(feature = "ascii_escape_display", since = "1.39.0")]
impl fmt::Display for EscapeDefault {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.write_str(unsafe { from_utf8_unchecked(&self.data[self.range.clone()]) })
}
}
#[stable(feature = "std_debug", since = "1.16.0")]
impl fmt::Debug for EscapeDefault {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {