Defined in header <vector> | ||
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template<class Allocator> class vector<bool, Allocator>; |
std::vector<bool> is a space-efficient specialization of std::vector for the type bool.
The manner in which std::vector<bool> is made space efficient (as well as whether it is optimized at all) is implementation defined. One potential optimization involves coalescing vector elements such that each element occupies a single bit instead of sizeof(bool) bytes.
std::vector<bool> behaves similarly to std::vector, but in order to be space efficient, it:
&v[0] + n != &v[n]) std::vector<bool>::reference as a method of accessing individual bits. In particular, objects of this class are returned by operator[] by value. std::allocator_traits::construct to construct bit values. | Member type | Definition |
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value_type | bool |
allocator_type | Allocator |
size_type | implementation-defined |
difference_type | implementation-defined |
| proxy class representing a reference to a single bool (class) |
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const_reference | bool |
pointer | implementation-defined |
const_pointer | implementation-defined |
iterator | implementation-defined |
const_iterator | implementation-defined |
reverse_iterator | std::reverse_iterator<iterator> |
const_reverse_iterator | std::reverse_iterator<const_iterator> |
constructs the vector (public member function of std::vector) |
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destructs the vector (public member function of std::vector) |
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| assigns values to the container (public member function of std::vector) |
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| assigns values to the container (public member function of std::vector) |
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| returns the associated allocator (public member function of std::vector) |
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Element access |
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| access specified element with bounds checking (public member function of std::vector) |
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| access specified element (public member function of std::vector) |
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| access the first element (public member function of std::vector) |
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| access the last element (public member function of std::vector) |
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Iterators |
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| returns an iterator to the beginning (public member function of std::vector) |
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| returns an iterator to the end (public member function of std::vector) |
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| returns a reverse iterator to the beginning (public member function of std::vector) |
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| returns a reverse iterator to the end (public member function of std::vector) |
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Capacity |
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| checks whether the container is empty (public member function of std::vector) |
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| returns the number of elements (public member function of std::vector) |
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| returns the maximum possible number of elements (public member function of std::vector) |
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| reserves storage (public member function of std::vector) |
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| returns the number of elements that can be held in currently allocated storage (public member function of std::vector) |
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Modifiers |
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| clears the contents (public member function of std::vector) |
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| inserts elements (public member function of std::vector) |
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(since C++14) | constructs element in-place (public member function of std::vector) |
| erases elements (public member function of std::vector) |
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| adds an element to the end (public member function of std::vector) |
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(C++14) | constructs elements in-place at the end (public member function of std::vector) |
| removes the last element (public member function of std::vector) |
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| changes the number of elements stored (public member function of std::vector) |
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| swaps the contents (public member function of std::vector) |
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| flips all the bits (public member function) |
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[static] | swaps two std::vector<bool>::references (public static member function) |
| lexicographically compares the values in the vector (function template) |
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specializes the std::swap algorithm (function template) |
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(C++11) | hash support for std::vector<bool> (class template specialization) |
If the size of the bitset is known at compile time, std::bitset may be used, which offers a richer set of member functions. In addition, boost::dynamic_bitset exists as an alternative to std::vector<bool>.
Since its representation may by optimized, std::vector<bool> does not necessarily meet all Container or SequenceContainer requirements. For example, because std::vector<bool>::iterator is implementation-defined, it may not satisfy the ForwardIterator requirement. Use of algorithms such as std::search that require ForwardIterators may result in either compile-time or run-time errors.
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