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make core::str::next_code_point work on arbitrary iterator #33896

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Merged
merged 1 commit into from
Jun 1, 2016
Merged

make core::str::next_code_point work on arbitrary iterator #33896

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5 changes: 3 additions & 2 deletions src/libcore/str/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -354,7 +354,7 @@ fn unwrap_or_0(opt: Option<&u8>) -> u8 {
/// UTF-8-like encoding).
#[unstable(feature = "str_internals", issue = "0")]
#[inline]
pub fn next_code_point(bytes: &mut slice::Iter<u8>) -> Option<u32> {
pub fn next_code_point<'a, I: Iterator<Item = &'a u8>>(bytes: &mut I) -> Option<u32> {
// Decode UTF-8
let x = match bytes.next() {
None => return None,
Expand Down Expand Up @@ -388,7 +388,8 @@ pub fn next_code_point(bytes: &mut slice::Iter<u8>) -> Option<u32> {
/// Reads the last code point out of a byte iterator (assuming a
/// UTF-8-like encoding).
#[inline]
fn next_code_point_reverse(bytes: &mut slice::Iter<u8>) -> Option<u32> {
fn next_code_point_reverse<'a,
I: DoubleEndedIterator<Item = &'a u8>>(bytes: &mut I) -> Option<u32> {
// Decode UTF-8
let w = match bytes.next_back() {
None => return None,
Expand Down