-3
我正尝试创建一个通用按钮,并且希望能够传递一个函数以在单击它时调用它。传递函数指针时无法解析的外部符号
main.cpp中:
#include "Window.h"
int testfunction() {
print("Test");
return 1;
}
...other stuff...
window->SetButtonFunction_NoArgs<int>(" *unrelated stuff* ", &testfunction);
窗口是一个WindowMain类:
window.h中:
class WindowMain {
*Stuff*
template <class R1> void SetButtonFunction_NoArgs(string id, R1(*func)());
*Other Stuff*
};
window.cpp:
///Find the object of that id and set the fuction to it
template <class R1> void WindowMain::SetButtonFunction_NoArgs(string id, R1(*func)()) {
for (int i = 0; i < objects_.size(); i++) {
if (objects_[i].getId() == id) {
objects_[i]->AddButton_NoArgs<R1>(func);
}
}
}
的问题是在这里我想,但我可以找不到它...当我尝试编译它给我这个:
1>main.obj : error LNK2019: unresolved external symbol "public: void __cdecl WindowMain::SetButtonFunction_NoArgs<int>(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >,int (__cdecl*)(void))" ([email protected]@[email protected]@[email protected][email protected]@[email protected]@[email protected]@[email protected]@[email protected]@[email protected]) referenced in function "void __cdecl Create(void)" ([email protected]@YAXXZ)
感谢您的帮助!
看看std :: function和lambdas或std :: bind! –