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deductiongu...td::multiset(3)  C++ Standard Libary deductiongu...td::multiset(3)

NAME
     deductionguidesforstd::multiset - deductionguidesforstd::multiset

Synopsis
	Defined in header <set>
	template<

	    class InputIt,
	    class Comp = std::less<typename
	std::iterator_traits<InputIt>::value_type>,
	    class  Alloc  = std::allocator<typename			     (1)
     (since C++17)
	std::iterator_traits<InputIt>::value_type>>
	multiset( InputIt, InputIt, Comp = Comp(), Alloc = Alloc() )

	    -> multiset<typename
	std::iterator_traits<InputIt>::value_type, Comp, Alloc>;
	template<

	    class Key, class Comp = std::less<Key>,
	    class Alloc = std::allocator<Key>  >			     (2)
     (since C++17)
	multiset( std::initializer_list<Key>, Comp = Comp(), Alloc =
	Alloc() )

	    -> multiset<Key, Comp, Alloc>;
	template< class InputIt, class Alloc >

	multiset( InputIt, InputIt, Alloc )
	    ->	multiset<typename					     (3)
     (since C++17)
	std::iterator_traits<InputIt>::value_type,

			std::less<typename
	std::iterator_traits<InputIt>::value_type>, Alloc>;
	template< class Key, class Alloc >

	multiset( std::initializer_list<Key>, Alloc  )			     (4)
     (since C++17)

	    -> multiset<Key, std::less<Key>, Alloc>;
	template< ranges::input_range R, class Compare =
	less<ranges::range_value_t<R>>,

		  class  Alloc	= std::allocator<ranges::range_value_t<R>> > (5)
     (since C++23)
	multiset( std::from_range_t, R&&, Compare = Compare(), Alloc =
	Alloc() )

	    -> multiset<ranges::range_value_t<R>, Compare, Alloc>;
	template< ranges::input_range R, class Alloc >

	multiset( std::from_range_t, R&&, Alloc  )			     (6)
     (since C++23)

	    -> multiset<ranges::range_value_t<R>,
	std::less<ranges::range_value_t<R>>, Alloc>;

	1-4) These deduction guides are provided for multiset to allow deduction
     from an
	iterator  range  (overloads  (1,3)) and std::initializer_list (overloads
     (2,4)).
	5,6) These deduction guides are provided for multiset to allow deduction
     from a
	std::from_range_t tag and an input_range.

	These overloads participate in overload resolution only if InputIt  sat-
     isfies
	LegacyInputIterator,  Alloc  satisfies Allocator, and Comp does not sat-
     isfy Allocator.

	Note: the extent to which the library determines that a  type  does  not
     satisfy
	LegacyInputIterator  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 satisfy Allocator is unspecified, except that as a minimum the
     member type
	Alloc::value_type must exist and the expression
	std::declval<Alloc&>().allocate(std::size_t{}) must be well-formed  when
     treated as
	an unevaluated operand.

Notes
	    Feature-test macro	     Value    Std		    Feature
	__cpp_lib_containers_ranges  202202L  (C++23)  Ranges-aware construction
     and insertion;
						    overload (5,6)

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());
      }

http://cppreference.com 	   2024.06.10	   deductiongu...td::multiset(3)
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