Chained Comparison인데, C++입니다

chainedcomp.cpp

#include<iostream>
using namespace std;

template <class T>
struct cmp
{
	T val; bool truthy;
	cmp(T x): val(x), truthy(true){}
	cmp(T x, bool b): val(x), truthy(b){}
	cmp<T> operator<=(T v)
	{
		return cmp<T>{v,truthy&&(val<=v)};
	}
	cmp<T> operator<(T v)
	{
		return cmp<T>{v,truthy&&(val<v)};
	}
	cmp<T> operator>(T v)
	{
		return cmp<T>{v,truthy&&(val>v)};
	}
	cmp<T> operator>=(T v)
	{
		return cmp<T>{v,truthy&&(val>=v)};
	}
	operator bool()
	{
		return truthy;
	}
};

int main()
{
	if((cmp<int>)1<3<5<7<9)cout << "Hello, World!";
}