23 Containers library [containers]

23.4 Associative containers [associative]

23.4.7 Class template multiset [multiset]

23.4.7.2 Constructors [multiset.cons]

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explicit multiset(const Compare& comp, const Allocator& = Allocator());
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Effects: Constructs an empty multiset using the specified comparison object and allocator.
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Complexity: Constant.
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template<class InputIterator> multiset(InputIterator first, InputIterator last, const Compare& comp = Compare(), const Allocator& = Allocator());
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Effects: Constructs an empty multiset using the specified comparison object and allocator, and inserts elements from the range [first, last).
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Complexity: Linear in N if the range [first, last) is already sorted with respect to comp and otherwise , where N is last - first.
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template<container-compatible-range<value_type> R> multiset(from_range_t, R&& rg, const Compare& comp = Compare(), const Allocator& = Allocator());
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Effects: Constructs an empty multiset using the specified comparison object and allocator, and inserts elements from the range rg.
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Complexity: Linear in N if rg is already sorted with respect to comp and otherwise , where N is ranges​::​distance(rg).