Movatterモバイル変換

[0]ホーム
URL:

cppreference.com
Namespaces
Variants
    Actions

      deduction guides forstd::multiset

      From cppreference.com
      <cpp‎ |container‎ |multiset

      [edit template]
       
       
       
      std::multiset
      Member functions
      Non-member functions
      (until C++20)(until C++20)(until C++20)(until C++20)(until C++20)
      Deduction guides(C++17)
       
      Defined in header<set>
      template<

         class InputIt,
         class Comp=std::less<typenamestd::iterator_traits<InputIt>::value_type>,
         class Alloc=std::allocator<typenamestd::iterator_traits<InputIt>::value_type>>
      multiset( InputIt, InputIt, Comp= Comp(), Alloc= Alloc())

         -> multiset<typenamestd::iterator_traits<InputIt>::value_type, Comp, Alloc>;
      		 (1)(since C++17)
      template<

         class Key,class Comp=std::less<Key>,
         class Alloc=std::allocator<Key>>
      multiset(std::initializer_list<Key>, Comp= Comp(), Alloc= Alloc())

         -> multiset<Key, Comp, Alloc>;
      		 (2)(since C++17)
      template<class InputIt,class Alloc>

      multiset( InputIt, InputIt, Alloc)
         -> multiset<typenamestd::iterator_traits<InputIt>::value_type,

                     std::less<typenamestd::iterator_traits<InputIt>::value_type>, Alloc>;
      		 (3)(since C++17)
      template<class Key,class Alloc>

      multiset(std::initializer_list<Key>, Alloc)

         -> multiset<Key,std::less<Key>, Alloc>;
      		 (4)(since C++17)
      template<ranges::input_range R,class Compare= less<ranges::range_value_t<R>>,

               class Alloc=std::allocator<ranges::range_value_t<R>>>
      multiset(std::from_range_t, R&&, Compare= Compare(), Alloc= Alloc())

         -> multiset<ranges::range_value_t<R>, Compare, Alloc>;
      		 (5)(since C++23)
      template<ranges::input_range R,class Alloc>

      multiset(std::from_range_t, R&&, Alloc)

         -> multiset<ranges::range_value_t<R>,std::less<ranges::range_value_t<R>>, Alloc>;
      		 (6)(since C++23)
      1-4) Thesededuction guides are provided formultiset to allow deduction from an iterator range (overloads(1,3)) andstd::initializer_list (overloads(2,4)).
      5,6) These deduction guides are provided formultiset to allow deduction from astd::from_range_t tag and aninput_range.

      These overloads participate in overload resolution only ifInputIt satisfiesLegacyInputIterator,Alloc satisfiesAllocator, andComp does not satisfyAllocator.

      Note: the extent to which the library determines that a type does not satisfyLegacyInputIterator is unspecified, except that as a minimum integral types do not qualify as input iterators. Likewise, the extent to which it determines that a type does not satisfyAllocator is unspecified, except that as a minimum the member typeAlloc::value_type must exist and the expressionstd::declval<Alloc&>().allocate(std::size_t{}) must be well-formed when treated as an unevaluated operand.

      [edit]Notes

      Feature-test macroValueStdFeature
      __cpp_lib_containers_ranges202202L(C++23)Ranges-aware construction and insertion; overload(5,6)

      [edit]Example

      Run this code
      #include <set> int main(){// guide #2 deduces std::multiset<int>std::multiset s={1,2,3,4}; // guide #1 deduces std::multiset<int>std::multiset s2(s.begin(), s.end());}
      Retrieved from "https://en.cppreference.com/mwiki/index.php?title=cpp/container/multiset/deduction_guides&oldid=135726"
      [8]ページ先頭
      ©2009-2026 Movatter.jp