std::vector::reserve

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C++ Standard Library
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Containers library
array (C++11) vector deque forward_list (C++11) list set multiset map multimap unordered_set (C++11) unordered_multiset (C++11) unordered_map (C++11) unordered_multimap (C++11) stack queue priority_queue
std::vector
Member functions vector::vector vector::~vector vector::operator= vector::assign vector::get_allocator Element access vector::at vector::operator[] vector::front vector::back vector::data Iterators vector::begin vector::cbegin (C++11) vector::end vector::cend (C++11) vector::rbegin vector::crbegin (C++11) vector::rend vector::crend (C++11) Capacity vector::empty vector::size vector::max_size vector::reserve vector::capacity vector::shrink_to_fit (C++11) Modifiers vector::clear vector::insert vector::emplace (C++11) vector::erase vector::push_back vector::emplace_back (C++11) vector::pop_back vector::resize vector::swap

void reserve( size_type size );

Sets the capacity of the container to at least size. New storage is allocated if necessary.

Contents 1 Parameters 2 Return value 3 Complexity 4 See also

[edit] Parameters

size

-

new capacity of the container

[edit] Return value

(none)

[edit] Complexity

linear in the size of the container

[edit] See also

capacity	returns the number of elements that can be held in currently allocated storage (public member function)