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Document split{_ascii,}_whitespace() for empty strings

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This commit is contained in:
Vojtech Kral 2022-11-23 15:36:51 +01:00
parent 4e0d0d757e
commit 07ccf67f59
1 changed files with 12 additions and 0 deletions
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12
library/core/src/str/mod.rs
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@ -902,6 +902,12 @@ impl str {
///
/// assert_eq!(None, iter.next());
/// ```
///
/// If the string is empty or all whitespace, the iterator yields no string slices:
/// ```
/// assert_eq!("".split_whitespace().next(), None);
/// assert_eq!(" ".split_whitespace().next(), None);
/// ```
#[must_use = "this returns the split string as an iterator, \
without modifying the original"]
#[stable(feature = "split_whitespace", since = "1.1.0")]
@ -946,6 +952,12 @@ impl str {
///
/// assert_eq!(None, iter.next());
/// ```
///
/// If the string is empty or all ASCII whitespace, the iterator yields no string slices:
/// ```
/// assert_eq!("".split_ascii_whitespace().next(), None);
/// assert_eq!(" ".split_ascii_whitespace().next(), None);
/// ```
#[must_use = "this returns the split string as an iterator, \
without modifying the original"]
#[stable(feature = "split_ascii_whitespace", since = "1.34.0")]