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| author | Jonathan Wakely <jwakely@redhat.com> | 2024-06-19 11:19:58 +0100 |
|---|---|---|
| committer | Jonathan Wakely <jwakely@redhat.com> | 2024-06-21 17:07:00 +0100 |
| commit | 139d65d1f5a60ac90479653a4f9b63618509f3f9 (patch) | |
| tree | 2c07aeff587c5d596f02a23b644edd38ac8b54be | |
| parent | b3743181899c5490a94c4dbde56a69ab77a40f11 (diff) | |
| download | gcc-139d65d1f5a60ac90479653a4f9b63618509f3f9.zip gcc-139d65d1f5a60ac90479653a4f9b63618509f3f9.tar.gz gcc-139d65d1f5a60ac90479653a4f9b63618509f3f9.tar.bz2 | |
libstdc++: Don't use std::__is_scalar in std::valarray initialization [PR115497]
This removes the use of the std::__is_scalar trait from <valarray>,
where it can be replaced by __is_trivial. It's used to decide whether we
can use memset to value-initialize valarray elements, but memset is
suitable for any trivial types, because value-initializing them is
equivalent to filling them with zeros.
This is another step towards removing the class templates in
<bits/cpp_type_traits.h> that conflict with Clang built-in names.
libstdc++-v3/ChangeLog:
PR libstdc++/115497
* include/bits/valarray_array.h (__valarray_default_construct):
Use __is_trivial(_Tp). instead of __is_scalar<_Tp>.
| -rw-r--r-- | libstdc++-v3/include/bits/valarray_array.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/libstdc++-v3/include/bits/valarray_array.h b/libstdc++-v3/include/bits/valarray_array.h index 66b74f9..07c49ce 100644 --- a/libstdc++-v3/include/bits/valarray_array.h +++ b/libstdc++-v3/include/bits/valarray_array.h @@ -80,7 +80,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION template<typename _Tp> struct _Array_default_ctor<_Tp, true> { - // For fundamental types, it suffices to say 'memset()' + // For trivial types, it suffices to say 'memset()' inline static void _S_do_it(_Tp* __b, _Tp* __e) { __builtin_memset(__b, 0, (__e - __b) * sizeof(_Tp)); } @@ -90,7 +90,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION inline void __valarray_default_construct(_Tp* __b, _Tp* __e) { - _Array_default_ctor<_Tp, __is_scalar<_Tp>::__value>::_S_do_it(__b, __e); + _Array_default_ctor<_Tp, __is_trivial(_Tp)>::_S_do_it(__b, __e); } // Turn a raw-memory into an array of _Tp filled with __t |