cppreference.com Log in Page Discussion Standard revision:DiffC++98/03C++11C++14C++17C++20C++23C++26 View View source History std::vector C++ Containers library std::vector Defined in header<vector> template< classT, classAllocator=std::allocator<T> ...
cppreference.com 创建账户 页面 讨论 变换 查看 编辑 历史 std::vector C++ 容器库 std::vector 在标头<vector>定义 template< classT, classAllocator=std::allocator<T> >classvector; (1) namespace { template<classT> usingvector=std::vector<T,std::pmr::polymorphic_allocator<T>>; ...
std::vector<bool> behaves similarly to std::vector, but in order to be space efficient, it: Does not necessarily store its elements as a contiguous array. Exposes class std::vector<bool>::reference as a method of accessing individual bits. In particular, objects of this class are return...
1.inplace_vector— A reference implementation ofP0843R14(std::inplace_vector). 2.static_vector— Boost.Container implements inplace vector as a standalone type with its own guarantees. 3.fixed_vector— EASTL implements inplace vector via an extra template parameter. ...
A list of popular vector functions can be found in the table below.FunctionDescription assign() Fills a vector with multiple values at() Returns an indexed element from a vector back() Returns the last element of a vector begin() Returns an iterator pointing to the beginning of a vector ...
#include <cassert> #include <inplace_vector> #include <new> #include <utility> int main() { using P = std::pair<int, int>; using I = std::inplace_vector<P, 3>; auto nums = I{{0, 1}, {2, 3}}; auto it = nums.emplace(nums.begin() + 1, -1, -2); assert((*it =...
std::cout<< president.name <<"was re-elected president of"<< president.country <<"in"<< president.year <<".\n"; }return0; }///reference:https://stackoverflow.com/questions/4303513/push-back-vs-emplace-backinttest_emplace_3() {/*template <class... Args> pair<iterator,bool> emplace...
is_trivially_copyable:调用[std::memmove]迁移数据(https://en.cppreference.com/w/cpp/string/byte/memmove),std::vector没有这个逻辑。 否则,循环迁移元素。 std::vector迁移元素时,会根据是否有noexcept move constructor来决定调用move constructor还是copy constructor(之前这篇文章提到过:c++ 从vector扩容看noexce...
// cliext_vector_clear.cpp // compile with: /clr #include <cliext/vector> int main() { cliext::vector<wchar_t> c1; c1.push_back(L'a'); c1.push_back(L'b'); c1.push_back(L'c'); // display initial contents " a b c" for each (wchar_t elem in c1) System::Console::Wr...
reference&operator=(constreference& Right); reference&operator=(boolVal); 參數 Right 值會指派給位元的項目參考。 Val 要指派給位元的布林值。 範例 C++ // vector_bool_ref_op_assign.cpp// compile with: /EHsc#include<vector>#include<iostream>#include<string>usingnamespacestd;template<typenameC>void...