(public static member constant) Member functions operator value_type returns the wrapped value (public member function) operator() (C++14) returns the wrapped value (public member function) std::integral_constant::operator value_type constexproperator value_type()constnoexcept; ...
返回value (公开成员函数) 成员类型 类型 定义 value_type bool type std::integral_constant<bool, value> 可能的实现template<class T> struct is_void : std::is_same<void, typename std::remove_cv<T>::type> {};示例运行此代码 #include <type_traits> void foo(); static_assert ( std::is...
除了std::common_type和std::basic_common_reference(C++20 起)以外,<type_traits>中定义的模板均不可对由程序定义的类型特化。这包含各种类型特征和std::integral_constant类模板。 std::hash对由程序定义的类型的特化的必须满足散列(Hash)要求。 std::atomic的特化必须拥有弃置的复制构造函数,弃置的复制赋值运算符...
typestd::integral_constant<bool, value> Possible implementation namespacedetail{template<classT>std::integral_constant<bool,!std::is_union<T>::value>test(intT::*);template<class>std::false_typetest(...);}template<classT>structis_class:decltype(detail::test<T>(nullptr)){}; ...
Inherited from std::integral_constant Member constants value [statico] true se T is an array type , false altrimenti Original: true if T is an array type , false otherwise The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click...
template< class T > struct is_arithmetic : std::integral_constant<bool, std::is_integral<T>::value || std::is_floating_point<T>::value> {}; Beispiel #include <iostream> #include <type_traits> class A {}; int main() { std::cout << std::boolalpha; std::cout << std::is_arit...
template< class T > struct is_arithmetic : std::integral_constant<bool, std::is_integral<T>::value || std::is_floating_point<T>::value> {}; Пример Запуститьэтоткод #include <atomic> #include <cstddef> #include <type_traits> class A {}; enum class B :...
Inherited from std::integral_constant Member constants value [static] true if T and U is the same type , false otherwise (public static member constant) Member functions operator bool converts the object to bool, returns value (public member function) operator() (C++14) returns ...
typestd::integral_constant<bool, value> Mögliche Implementierung template<classT>structis_floating_point:std::integral_constant<bool,std::is_same<float,typenamestd::remove_cv<T>::type>::value||std::is_same<double,typenamestd::remove_cv<T>::type>::value||std::is_same<longdouble,typena...
computes absolute value of an integral value (|x||x|) (function) div(int)ldivlldiv (C++11) computes quotient and remainder of integer division (function) Defined in header<cinttypes> abs(std::intmax_t)imaxabs (C++11)(C++11) computes absolute value of an integral value (|x||x|) ...