The default implementation of last() goes through the entire iterator
but that's not needed here.
assert_eq!(pos, p.len());
}
+#[test]
+fn test_char_indices_last() {
+ let s = "ศไทย中华Việt Nam";
+ let mut it = s.char_indices();
+ it.next();
+ assert_eq!(it.last(), Some((27, 'm')));
+}
+
#[test]
fn test_splitn_char_iterator() {
let data = "\nMäry häd ä little lämb\nLittle lämb\n";
fn size_hint(&self) -> (usize, Option<usize>) {
self.iter.size_hint()
}
+
+ #[inline]
+ fn last(mut self) -> Option<(usize, char)> {
+ // No need to go through the entire string.
+ self.next_back()
+ }
}
#[stable(feature = "rust1", since = "1.0.0")]