c++ - 错误 : reference to overloaded function could not be resolved; did you mean to call it?

Question

下面的代码:

#include <cstddef>
using std::size_t;

int hOccupy(int* numB, const void* f, int bS, size_t dyn);

template <class T>
inline int hOccupy(int* numB, T f, int bS, size_t dyn) {
    return hOccupy(numB, reinterpret_cast<const void*>(f), bS, dyn);
}

int main(int argc, char *argv[]) {
    decltype(&hOccupy) f = &hOccupy;
}

给出错误:

 error: reference to overloaded function could not be resolved; did you mean to call it?

任何人都可以建议这里出了什么问题以及如何克服它？

Answer 1

hOccupy是一个重载函数。这意味着为了获得它的地址，您需要指定您想要地址的重载。例如，如果您希望指针指向

hError_t hOccupy(int* numB, const void* f, int bS, size_t dyn);

然后你可以使用

auto f = static_cast<hError_t (*)(int, const void*, int, size_t)>(&hOccupy);

如果你想要 f要引用重载集，那么您可以使用 lambda 之类的

auto f = [](int* numB, auto f, int bS, size_t dyn){ return hOccupy(numB, f, bS, dyn); };