類模板
<type_traits>
std::is_member_function_pointer
template <class T> struct is_member_function_pointer;
Is member function pointer
示例
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// is_member_function_pointer example
#include <iostream>
#include <type_traits>
struct A { void fn() {}; };
int main() {
void(A::*pt)() = &A::fn;
std::cout << std::boolalpha;
std::cout << "is_member_function_pointer:" << std::endl;
std::cout << "A*: " << std::is_member_function_pointer<A*>::value << std::endl;
std::cout << "void(A::*)(): " << std::is_member_function_pointer<void(A::*)()>::value << std::endl;
std::cout << "decltype(pt): " << std::is_member_function_pointer<decltype(pt)>::value << std::endl;
return 0;
}
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輸出
is_member_object_pointer:
A*: false
int A::*: true
decltype(pt): true
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