Type traits Primary type categories Variable template Value Defined in header <experimental/type_traits> template<class T> constexpr bool is_void_v = std::is_void<T>::value; template<class T> constexpr bool is_null_pointer_v = std::is_null_pointer<T>::value; template<class T>...
Type traits−ratio integer_sequence(C++14) General utilities library Function objects−hash(C++11) Swap−Type operations(C++11) Integer comparison(C++20) pair−tuple(C++11) optional(C++17) expected(C++23) variant(C++17)−any(C++17) ...
Type traits−ratio integer_sequence(C++14) General utilities library Function objects−hash(C++11) Swap−Type operations(C++11) Integer comparison(C++20) pair−tuple(C++11) optional(C++17) expected(C++23) variant(C++17)−any(C++17) ...
Support des types−traits(C++11) Utilitaires Compratateurs relationels(C++20) numeric_limits−type_info initializer_list(C++11) Concepts(C++20) Diagnostics Utilitaires généraux Pointeurs intelligents and allocateurs Date et heure Fonction-objets−hash(C++11) ...
__cpp_lib_type_identity 201806L (C++20) std::type_identity 示例运行此代码 #include <iostream> #include <type_traits> template<class T> T foo(T a, T b) { return a + b; } template<class T> T bar(T a, std::type_identity_t<T> b) { return a + b; } int main() { // ...
traits_typeTraits;Traits::char_type不是CharT时程序非良构。 int_typeTraits::int_type pos_typeTraits::pos_type off_typeTraits::off_type 成员函数 (构造函数) 构造文件流 (公开成员函数) (析构函数) [虚](隐式声明) 析构basic_ofstream和关联的缓冲区,并关闭文件 ...
taskresuming_on_new_thread(std::jthread&out){coroutine_state*state=newstate();state.copy(out);auto&promise=state.promise();autoret=promise.get_return_object();// promise 的类型 由std::coroutine_traits<task>::promise_type 决定// 事实上就是 task::promise_typeco_awaitpromise.initial_suspend(...
locale_type Traits::locale_type flag_type std::regex_constants::syntax_option_type 成员函数 构造函数:构造正则表达式对象 析构函数:销毁正则表达式对象 operator=:赋值内容 assign:赋值内容 观察者 mark_count:返回正则表达式中标记的子表达式的数量 flags:返回语法标志 区域设置 getloc:获取区域信息 imbue:设置区...
size_typeUnsigned integer type (usuallystd::size_t) difference_typeSigned integer type (usuallystd::ptrdiff_t) referencevalue_type& const_referenceconstvalue_type& pointer Allocator::pointer (until C++11) std::allocator_traits<Allocator>::pointer ...
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