declval() [2/2]

template<typename _Tp>

auto std::declval ( ) -> decltype(__declval< _Tp >(0))

noexcept

Utility to simplify expressions used in unevaluated operands

Since

C++11

Definition at line 2714 of file type_traits.

    {
      static_assert(__declval_protector<_Tp>::__stop,
                "declval() must not be used!");

References declval().

Referenced by std::_Rb_tree< key_type, value_type, _Select1st< value_type >, key_compare, _Pair_alloc_type >::_Rb_tree(), std::reference_wrapper< _Tp >::reference_wrapper(), std::vector< _Tp, polymorphic_allocator< _Tp > >::vector(), std::ranges::ref_view< _Range >::_S_fun(), std::ranges::elements_view< _Vp, _Nm >::__iter_cat< _Const >::_S_iter_cat(), std::ranges::__access::_Begin::_S_noexcept(), std::ranges::__access::_Data::_S_noexcept(), std::ranges::__access::_Empty::_S_noexcept(), std::ranges::__access::_End::_S_noexcept(), std::ranges::__access::_RBegin::_S_noexcept(), std::ranges::__access::_REnd::_S_noexcept(), std::ranges::__access::_Size::_S_noexcept(), std::ranges::views::_All::_S_noexcept(), std::allocator_traits< _OuterAlloc >::_S_nothrow_construct(), std::vector< _Tp, polymorphic_allocator< _Tp > >::_S_nothrow_relocate(), construct_at(), declval(), std::common_iterator< _Iter, _Sent >::iter_move, std::reverse_iterator< iterator >::iter_move, std::common_iterator< _Iter, _Sent >::iter_swap, std::reverse_iterator< iterator >::iter_swap, std::compare_three_way::noexcept(), std::unique_ptr< _State >::operator*(), std::__debug::deque< _Tp, _Allocator >::swap(), std::__debug::list< _Tp, _Allocator >::swap(), std::__debug::map< _Key, _Tp, _Compare, _Allocator >::swap(), std::__debug::multimap< _Key, _Tp, _Compare, _Allocator >::swap(), std::__debug::multiset< _Key, _Compare, _Allocator >::swap(), std::__debug::set< _Key, _Compare, _Allocator >::swap(), and std::__debug::vector< _Tp, _Allocator >::swap().

Here is the call graph for this function:

Here is the caller graph for this function: