Construction, destruction, copying

Empty container constructors

concurrent_hash_map();

explicit concurrent_hash_map( const HashCompare& compare,
                              const allocator_type& alloc = allocator_type() );

explicit concurrent_hash_map( const allocator_type& alloc );

Constructs an empty concurrent_hash_map. The initial number of buckets is unspecified.

If provided, uses the comparator compare to calculate hash codes and compare key_type objects for equality and the allocator alloc to allocate the memory.

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concurrent_hash_map( size_type n, const HashCompare& compare,
                     const allocator_type& alloc = allocator_type() );

concurrent_hash_map( size_type n, const allocator_type& alloc = allocator_type() );

Constructs an empty concurrent_hash_map with n preallocated buckets.

If provided, uses the comparator compare to calculate hash codes and compare key_type objects for equality and the allocator alloc to allocate the memory.

Constructors from the sequence of elements

template <typename InputIterator>
concurrent_hash_map( InputIterator first, InputIterator last,
                     const HashCompare& compare,
                     const allocator_type& alloc = allocator_type() );

template <typename InputIterator>
concurrent_hash_map( InputIterator first, InputIterator last,
                     const allocator_type& alloc = allocator_type() );

Constructs the concurrent_hash_map which contains the elements from the half-open interval [first, last).

If the range [first, last) contains multiple elements with equal keys, it is unspecified which element would be inserted.

If provided, uses the comparator compare to calculate hash codes and compare key_type objects for equality and the allocator alloc to allocate the memory.

Requirements: the type InputIterator shall meet the requirements of InputIterator from [input.iterators] ISO C++ Standard section.

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concurrent_hash_map( std::initializer_list<value_type> init,
                     const HashCompare& compare,
                     const allocator_type& alloc = allocator_type() );

Equivalent to concurrent_hash_map(init.begin(), init.end(), compare, alloc).

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concurrent_hash_map( std::initializer_list<value_type> init,
                     const allocator_type& alloc = allocator_type() );

Equivalent to concurrent_hash_map(init.begin(), init.end(), alloc).

Copying constructors

concurrent_hash_map( const concurrent_hash_map& other );

concurrent_hash_map( const concurrent_hash_map& other,
                     const allocator_type& alloc );

Constructs a copy of other.

If the allocator argument is not provided, it is obtained by calling std::allocator_traits<allocator_type>::select_on_container_copy_construction(other.get_allocator()).

The behavior is undefined in case of concurrent operations with other.

Moving constructors

concurrent_hash_map( concurrent_hash_map&& other );

concurrent_hash_map( concurrent_hash_map&& other,
                     const allocator_type& alloc );

Constructs a concurrent_hash_map with the content of other using move semantics.

other is left in a valid, but unspecified state.

If the allocator argument is not provided, it is obtained by calling std::move(other.get_allocator()).

The behavior is undefined in case of concurrent operations with other.

Destructor

~concurrent_hash_map();

Destroys the concurrent_hash_map. Calls destructors of the stored elements and deallocates the used storage.

The behavior is undefined in case of concurrent operations with *this.

Assignment operators

concurrent_hash_map& operator=( const concurrent_hash_map& other );

Replaces all elements in *this by the copies of the elements in other.

Copy assigns allocators if std::allocator_traits<allocator_type>::propagate_on_container_copy_assignment::value is true.

The behavior is undefined in case of concurrent operations with *this and other.

Returns: a reference to *this.

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concurrent_hash_map& operator=( concurrent_hash_map&& other );

Replaces all elements in *this by the elements in other using move semantics.

other is left in a valid, but unspecified state.

Move assigns allocators if std::allocator_traits<allocator_type>::propagate_on_container_move_assignment::value is true.

The behavior is undefined in case of concurrent operations with *this and other.

Returns: a reference to *this.

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concurrent_hash_map& operator=( std::initializer_list<value_type> init );

Replaces all elements in *this by the elements in init.

If init contains multiple elements with equal keys, it is unspecified which element would be inserted.

The behavior is undefined in case of concurrent operations with *this.

Returns: a reference to *this.

get_allocator

allocator_type get_allocator() const;

Returns: a copy of the allocator associated with *this.