std::make_signed<T>::type 参数:模板std::make_signed接受单个参数T(Trait类),并将类型T设为有符号类型。 下面是在C++中演示std::make_signed的程序: 程序: // C++ program to illustrate// std::make_signed//make_signed#include<iostream>#include<type_traits>usingnamespacestd;// Declare enumenumENU...
std::make_signed std::make_unsigned std::remove_reference std::add_lvalue_reference, std::add_rvalue_reference std::remove_pointer std::add_pointer std::remove_extent std::remove_all_extents std::aligned_storage std::aligned_union std::decay std::enable_if std::void_t std::conditional ...
make_signed_t<volatile unsigned long>; using enum_type = std::make_signed_t<E>; static_assert( std::is_same_v<char_type, signed char> and std::is_same_v<int_type, signed int> and std::is_same_v<long_type, volatile signed long> and std::is_same_v<enum_type, signed short> ...
如果程序添加了 std::make_signed 的特化,那么行为未定义。 成员类型名称 定义 type T 的对应有符号整数类型 辅助类型template< class T > using make_signed_t = typename make_signed<T>::type; (C++14 起) 示例运行此代码 #include <type_traits> enum struct E : unsigned short {}; int main() {...