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libstdc++: Fix std::__uninitialized_default_n for constant evaluation [PR110542]

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libstdc++-v3/ChangeLog:

	PR libstdc++/110542
	* include/bits/stl_uninitialized.h (__uninitialized_default_n):
	Do not use std::fill_n during constant evaluation.
This commit is contained in:
Jonathan Wakely 2023-07-04 16:03:45 +01:00
parent 4870a18ac2
commit 83cae6c4b7
1 changed files with 6 additions and 0 deletions
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6
libstdc++-v3/include/bits/stl_uninitialized.h
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@ -695,6 +695,12 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
inline _ForwardIterator
__uninitialized_default_n(_ForwardIterator __first, _Size __n)
{
#ifdef __cpp_lib_is_constant_evaluated
if (std::is_constant_evaluated())
return __uninitialized_default_n_1<false>::
__uninit_default_n(__first, __n);
#endif
typedef typename iterator_traits<_ForwardIterator>::value_type
_ValueType;
// See uninitialized_fill_n for the conditions for using std::fill_n.