std::multimap
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std::multimap | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Defined in header <map>
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template<
class Key, |
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Multimap is an associative container that contains a sorted list of key-value pairs. Sorting is done according to the comparison function Compare, applied to the keys. Search, insertion, and removal operations have logarithmic complexity.
The order of the key-value pairs whose keys compare equivalent is the order of insertion and does not change. (C++11 feature)
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[edit] Member types
Member type | Definition |
key_type | Key |
mapped_type | T |
value_type | std::pair<const Key, T> |
size_type | Unsigned integral type (usually size_t) |
difference_type | Signed integer type (usually ptrdiff_t) |
key_compare | Compare |
allocator_type | Allocator |
reference | Allocator::reference (pre-C++11 version) value_type& (C++11 version) |
const_reference | Allocator::const_reference (pre-C++11 version) const value_type& (C++11 version) |
pointer | T* (pre-C++11 version) std::allocator_traits<Allocator>::pointer (C++11 version) |
const_pointer | const T* (pre-C++11 version) std::allocator_traits<Allocator>::const_pointer (C++11 version) |
iterator | Bidirectional iterator |
const_iterator | Constant bidirectional iterator |
reverse_iterator
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std::reverse_iterator<iterator> |
const_reverse_iterator
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std::reverse_iterator<const_iterator> |
[edit] Member functions
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constructs the multimap (public member function) |
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destructs the multimap (public member function) |
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assigns values to the container (public member function) |
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returns the associated allocator (public member function) |
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Iterators | |||
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returns an iterator to the beginning (public member function) |
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returns an iterator to the end (public member function) |
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returns a reverse iterator to the beginning (public member function) |
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returns a reverse iterator to the end (public member function) |
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Capacity | |||
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checks whether the container is empty (public member function) |
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returns the number of elements (public member function) |
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returns the maximum possible number of elements (public member function) |
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Modifiers | |||
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clears the contents (public member function) |
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inserts elements (public member function) |
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constructs element in-place (public member function) |
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constructs elements in-place using a hint (public member function) |
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erases elements (public member function) |
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swaps the contents (public member function) |
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Lookup | |||
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returns the number of elements matching specific key (public member function) |
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finds element with specific key (public member function) |
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returns range of elements matching a specific key (public member function) |
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returns an iterator to the first element not less than the given value (public member function) |
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returns an iterator to the first element greater than a certain value (public member function) |
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Observers | |||
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returns the function that compares keys (public member function) |
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returns the function that compares keys (public member function) |
[edit] Non-member functions
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lexicographically compares the values in the container (function) |
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specializes the std::swap() algorithm (function template) |