struct X{ }; bool operator>(X& a, int& b){ return true; } template<class T> auto operator<(T const& v, int&&) -> decltype(v > int()){ return true; } int main(void) { X x; x < 6; }
Standard input is empty
prog.cpp: In function 'int main()': prog.cpp:11:7: error: no match for 'operator<' in 'x < 6'
Standard output is empty