std::queue
From cppreference.com
Defined in header
<queue>
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template<
class T, |
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The std::queue
class is a container adapter that gives the programmer the functionality of a queue - specifically, a FIFO (first-in, first-out) data structure.
The class template acts as a wrapper to the underlying container - only a specific set of functions is provided. The queue pushes the elements on the back of the underlying container and pops them from the front.
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[edit] Template parameters
T | - | The type of the stored elements. |
Container | - | The type of the underlying container to use to store the elements. The container must satisfy the requirements of SequenceContainer . Additionally, it must provide the following functions with the usual semantics:
The standard containers std::deque and std::list satisfy these requirements. |
[edit] Member types
Member type | Definition |
container_type
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Container
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value_type
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Container::value_type
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size_type
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Container::size_type
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reference
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Container::reference
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const_reference
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Container::const_reference
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[edit] Member functions
constructs the queue (public member function) |
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destructs the queue (public member function) |
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assigns values to the container adaptor (public member function) |
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Element access |
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access the first element (public member function) |
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access the last element (public member function) |
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Capacity |
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checks whether the underlying container is empty (public member function) |
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returns the number of elements (public member function) |
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Modifiers |
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inserts element at the end (public member function) |
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(C++11)
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constructs element in-place at the end (public member function) |
removes the first element (public member function) |
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swaps the contents (public member function) |
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Member objects |
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Container c |
the underlying container (protected member object) |
[edit] Non-member functions
lexicographically compares the values in the queue (function template) |
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specializes the std::swap algorithm (function template) |
[edit] Helper classes
(C++11)
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specializes the std::uses_allocator type trait (function template) |