考虑下面的代码:
#include <iostream>
#include <functional>
struct B {
template <class C, class M, class T>
void call1(C (M::*member)(), T *instance) {
std::function<void()> fp = std::bind(member, instance);
fp();
}
template <class C, class M, class T>
void call2(C (M::*member), T *instance) {
std::function<void()> fp = std::bind(member, instance);
fp();
}
void foo() {
call1(&B::func, this); // works
call2(&B::func, this); // works
call1(&B::func2, this); // Error: no matching member function for call to 'call2'
call2(&B::func2, this); // works
}
void func() {
std::cout << "func\n";
}
void func2() const volatile {
std::cout << "func2\n";
}
};
int main() {
B{}.foo();
}
似乎以后的版本不接受带有额外cv限定符的函数。
像这样指定函数成员指针和像这样指定C (M::*member)
有什么区别
https://stackoverflow.com/questions/35179578
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