* @param __va valarray.
*/
template<class _Tp>
+ [[__nodiscard__]]
inline _Tp*
- begin(valarray<_Tp>& __va)
- { return std::__addressof(__va[0]); }
+ begin(valarray<_Tp>& __va) noexcept
+ { return __va.size() ? std::__addressof(__va[0]) : nullptr; }
/**
* @brief Return an iterator pointing to the first element of
* @param __va valarray.
*/
template<class _Tp>
+ [[__nodiscard__]]
inline const _Tp*
- begin(const valarray<_Tp>& __va)
- { return std::__addressof(__va[0]); }
+ begin(const valarray<_Tp>& __va) noexcept
+ { return __va.size() ? std::__addressof(__va[0]) : nullptr; }
/**
* @brief Return an iterator pointing to one past the last element of
* @param __va valarray.
*/
template<class _Tp>
+ [[__nodiscard__]]
inline _Tp*
- end(valarray<_Tp>& __va)
- { return std::__addressof(__va[0]) + __va.size(); }
+ end(valarray<_Tp>& __va) noexcept
+ {
+ if (auto __n = __va.size())
+ return std::__addressof(__va[0]) + __n;
+ else
+ return nullptr;
+ }
/**
* @brief Return an iterator pointing to one past the last element of
* @param __va valarray.
*/
template<class _Tp>
+ [[__nodiscard__]]
inline const _Tp*
- end(const valarray<_Tp>& __va)
- { return std::__addressof(__va[0]) + __va.size(); }
+ end(const valarray<_Tp>& __va) noexcept
+ {
+ if (auto __n = __va.size())
+ return std::__addressof(__va[0]) + __n;
+ else
+ return nullptr;
+ }
#endif // C++11
/// @} group numeric_arrays
-// { dg-do compile { target c++11 } }
+// { dg-do run { target c++11 } }
// Copyright (C) 2010-2021 Free Software Foundation, Inc.
//
// with this library; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
-// 26.6.10 valarray range access: [valarray.range]
+// C++11 26.6.10 valarray range access: [valarray.range]
#include <valarray>
test01()
{
std::valarray<double> va{1.0, 2.0, 3.0};
- std::begin(va);
- std::end(va);
+ (void) std::begin(va);
+ (void) std::end(va);
const auto& cva = va;
- std::begin(cva);
- std::end(cva);
+ (void) std::begin(cva);
+ (void) std::end(cva);
+
+ using Iter = decltype(std::begin(va));
+ using IterTraits = std::iterator_traits<Iter>;
+ static_assert( std::is_same<Iter, decltype(std::end(va))>::value, "" );
+ static_assert( std::is_same<IterTraits::iterator_category,
+ std::random_access_iterator_tag>::value, "" );
+ static_assert( std::is_same<IterTraits::value_type, double>::value, "" );
+ static_assert( std::is_same<IterTraits::reference, double&>::value, "" );
+ using CIter = decltype(std::begin(cva));
+ using CIterTraits = std::iterator_traits<CIter>;
+ static_assert( std::is_same<CIter, decltype(std::end(cva))>::value, "" );
+ static_assert( std::is_same<CIterTraits::iterator_category,
+ std::random_access_iterator_tag>::value, "" );
+ static_assert( std::is_same<CIterTraits::value_type, double>::value, "" );
+ static_assert( std::is_same<CIterTraits::reference, const double&>::value, "" );
+#if __cplusplus >= 202002L
+ static_assert( std::contiguous_iterator<Iter> );
+ static_assert( std::contiguous_iterator<CIter> );
+#endif
+}
+
+// PR libstdc++/103022
+void
+test02()
+{
+ std::valarray<double> va;
+ (void) std::begin(va);
+ (void) std::end(va);
+ const auto& cva = va;
+ (void) std::begin(cva);
+ (void) std::end(cva);
+}
+
+int main()
+{
+ test01();
+ test02();
}
-// { dg-do compile { target c++14 } }
+// { dg-do run { target c++14 } }
// Copyright (C) 2015-2021 Free Software Foundation, Inc.
//
// with this library; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
-// 26.6.10 valarray range access: [valarray.range]
+// C++11 26.6.10 valarray range access: [valarray.range]
#include <iterator>
#include <valarray>
(void) std::cbegin(cva);
(void) std::cend(cva);
}
+
+// PR libstdc++/103022
+void
+test02()
+{
+ std::valarray<double> va;
+ (void) std::cbegin(va);
+ (void) std::cend(va);
+ const auto& cva = va;
+ (void) std::cbegin(cva);
+ (void) std::cend(cva);
+}
+
+int main()
+{
+ test01();
+ test02();
+}