我正在玩一个用C++重载lambdas的技巧.特别:
// For std::function
#include <functional>
// For std::string
#include <string>
// For std::cout
#include <iostream>
template <class... F>
struct overload : F... {
overload(F... f) : F(f)... {}
};
template <class... F>
auto make_overload(F... f) {
return overload<F...>(f...);
}
int main() {
std::function <int(int,int)> f = [](int x,int y) {
return x+y;
};
std::function <double(double,double)> g = [](double x,double y) {
return x+y;
};
std::function <std::string(std::string,std::string)> h = [](std::string x,std::string y) {
return x+y;
};
auto fgh = make_overload(f,g,h); …