std::vector<bool>表现类似std::vector,但为节省空间,它: 不必作为连续数组存储元素 暴露类std::vector<bool>::reference为访问单个位的方法。尤其是,operator[]以值返回此类型的对象。 不使用std::allocator_traits::construct构造位值。 不保证同一容器中的不同元素能由不同线程同时修改。
std::vector<bool> Member functions vector::vector vector::~vector vector::operator= vector::assign vector::get_allocator Element access vector::at vector::operator[] vector::front vector::back Iterators vector::beginvector::cbegin (C++11) vector::endvector::cend (C++11) vector::rbeginvector...
std::vector(对于bool以外的T)满足容器(Container)、知分配器容器(AllocatorAwareContainer)、序列容器(SequenceContainer)、连续容器(ContiguousContainer)(C++17 起)及可逆容器(ReversibleContainer)的要求。 std::vector的全部成员函数均为constexpr:在常量表达式求值中创建并使用std::vector对象是可能的。
vector<bool> space-efficient dynamic bitset (class template specialization) Iterator invalidation OperationsInvalidated All read only operationsNever. swap,std::swapend() clear,operator=,assignAlways. reserve,shrink_to_fitIf the vector changed capacity, all of them. If not, none. ...
std::hash<std::vector<bool>> From cppreference.com Defined in header<vector> template<classAllocator> structhash<std::vector<bool, Allocator>>; (since C++11) The template specialization ofstd::hashforstd::vector<bool>allows users to obtain hashes of objects of typestd::vector<bool>. ...
inplace_vector(C++26) hive(C++26) map−multimap−set−multiset unordered_map(C++11) unordered_multimap(C++11) unordered_set(C++11) unordered_multiset(C++11) Container adaptors span(C++20)−mdspan(C++23) Iterators library Ranges library(C++20) ...
Original: hash support for std::vector<bool> The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (class Template-Spezialisierung) std::hash<std::thread::id> (C++11) Hash-Unterstützung für std::thre...
#include<vector>usingnamespacestd;vector<int> numbers1;//an empty vector of intsvector<int>numbers2(10);//a vector of 10 intsvector<int>numbers3(10,2);//a vector of 10 ints, each initialized to 2vector<int> numbers4 {10,20,30,40};//a vector initialized with an initialization lis...
(char const *logline); static bool SaveTo(char const *filename); private: static std::list<std::string> m_data; }; In log.cpp we need to add std::list<std::string> Log::m_data; 饿汉模式: 饿汉模式 是指单例实例在程序运行时被立即执行初始化: class Log { public: static Log* ...
I am trying to build a simple example using GNU 7.3.0 #include <iostream> #include <string> #include <vector> #include <absl/strings/str_join.h> int main() { std::vector<std::string> v = {"foo","bar","baz"}; std::string s = absl::StrJoin...