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-rw-r--r--contrib/llvm-project/libcxx/include/__algorithm/shift_left.h43
1 files changed, 21 insertions, 22 deletions
diff --git a/contrib/llvm-project/libcxx/include/__algorithm/shift_left.h b/contrib/llvm-project/libcxx/include/__algorithm/shift_left.h
index c9f2cbb9f7b6..645c58c29119 100644
--- a/contrib/llvm-project/libcxx/include/__algorithm/shift_left.h
+++ b/contrib/llvm-project/libcxx/include/__algorithm/shift_left.h
@@ -22,30 +22,29 @@ _LIBCPP_BEGIN_NAMESPACE_STD
#if _LIBCPP_STD_VER >= 20
template <class _ForwardIterator>
-inline _LIBCPP_HIDE_FROM_ABI constexpr
-_ForwardIterator
-shift_left(_ForwardIterator __first, _ForwardIterator __last,
- typename iterator_traits<_ForwardIterator>::difference_type __n)
-{
- if (__n == 0) {
- return __last;
+inline _LIBCPP_HIDE_FROM_ABI constexpr _ForwardIterator
+shift_left(_ForwardIterator __first,
+ _ForwardIterator __last,
+ typename iterator_traits<_ForwardIterator>::difference_type __n) {
+ if (__n == 0) {
+ return __last;
+ }
+
+ _ForwardIterator __m = __first;
+ if constexpr (__has_random_access_iterator_category<_ForwardIterator>::value) {
+ if (__n >= __last - __first) {
+ return __first;
}
-
- _ForwardIterator __m = __first;
- if constexpr (__has_random_access_iterator_category<_ForwardIterator>::value) {
- if (__n >= __last - __first) {
- return __first;
- }
- __m += __n;
- } else {
- for (; __n > 0; --__n) {
- if (__m == __last) {
- return __first;
- }
- ++__m;
- }
+ __m += __n;
+ } else {
+ for (; __n > 0; --__n) {
+ if (__m == __last) {
+ return __first;
+ }
+ ++__m;
}
- return std::move(__m, __last, __first);
+ }
+ return std::move(__m, __last, __first);
}
#endif // _LIBCPP_STD_VER >= 20