This patch makes swap functions constexpr. Both swap overloads, swap_ranges and iter_swap are updated (with tests).
llvm-svn: 365238
Cr-Mirrored-From: sso://chromium.googlesource.com/_direct/external/github.com/llvm/llvm-project
Cr-Mirrored-Commit: 28e0187175ceeadae61d01fcedefa15f97f454f0
diff --git a/include/utility b/include/utility
index 8b45069..3961370 100644
--- a/include/utility
+++ b/include/utility
@@ -252,7 +252,7 @@
template <class _ForwardIterator1, class _ForwardIterator2>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
_ForwardIterator2
swap_ranges(_ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2)
{
@@ -263,7 +263,7 @@
// forward declared in <type_traits>
template<class _Tp, size_t _Np>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
typename enable_if<
__is_swappable<_Tp>::value
>::type