Make internal class __wrap_iter constexpr when not using libc++'s debugging mode. Introduce a new macro _LIBCPP_CONSTEXPR_IF_NODEBUG to mark this.
llvm-svn: 337019
diff --git a/libcxx/include/algorithm b/libcxx/include/algorithm
index a94b07b..b8fa7e7 100644
--- a/libcxx/include/algorithm
+++ b/libcxx/include/algorithm
@@ -1708,7 +1708,7 @@
#if _LIBCPP_DEBUG_LEVEL < 2
template <class _Tp>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG
typename enable_if
<
is_trivially_copy_assignable<_Tp>::value,
@@ -1722,7 +1722,7 @@
#else
template <class _Tp>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG
typename enable_if
<
is_trivially_copy_assignable<_Tp>::value,
