#include <complex>
template <class Snd>
using sender_result_t = typename Snd::result_t;
struct None{};
template<typename T,typename Rcvr>
struct just_op{
T val;
Rcvr rcvr;
void start(){
set_value(rcvr,val);
}
};
template<typename T>
struct just{
using result_t = T;
T val;
just(T v):val(std::move(v)){}
template<typename Rcvr>
friend auto connect(just self,Rcvr rcvr){
return just_op<T,Rcvr>{self.val,rcvr};
}
};
template<typename Rcvr,typename Func>
struct arith_reciever{
Rcvr rcvr;
Func func;
friend void set_value(arith_reciever& self,auto val){
set_value(self.rcvr,self.func(val));
}
};
template<typename PrevSend, typename Func>
struct arith_sender{
using prev_result_t = sender_result_t<PrevSend>;
using result_t = std::invoke_result_t<Func, prev_result_t>;
PrevSend prev_send;
Func fun;
template<typename Rcvr>
friend auto connect(arith_sender self,Rcvr rcvr){
return connect(self.prev_send,arith_reciever<Rcvr,Func>{rcvr,self.fun});
}
};
template<typename T,typename Func>
arith_sender(T,Func)->arith_sender<T,Func>;
template<typename T>
struct eval_reciever{
T& val;
friend void set_value(eval_reciever self,auto v){
self.val=v;
}
};
template<typename Send>
sender_result_t<Send> evaluator(Send send){
using T =typename Send::result_t;
T v;
auto op=connect(send,eval_reciever<T>{v});
op.start();
return v;
}
auto add_to(auto val,auto sender){
return arith_sender{sender,[val=std::move(val)](auto v){return val+v;}};
}
auto mult_with(auto val,auto sender){
return arith_sender{sender,[val=std::move(val)](auto v){return val*v;}};
}
auto div_by(auto val,auto sender){
return arith_sender{sender,[val=std::move(val)](auto v){return val/v;}};
}
auto operator|(auto send,auto func){
return arith_sender{send,func};
}
using namespace std;
auto add(auto a, auto b){
return a+b;
}
auto mult(auto a, auto b){
return a+b;
}
auto div(auto a, auto b){
return a+b;
}
int main(){
auto res = add(complex(8,6),
mult(complex(5,7),
div(complex(2,3),complex(3,5))));
auto res2 = add(std::string("Hello"),std::string("world"));
auto my_complex_algo=[](auto send){
return div_by(complex(13,17),
mult_with(complex(1,2),
add_to(complex(5,6),
send)));
};
auto eval = my_complex_algo(just(complex(1,3)));
auto v= evaluator(eval);
printf("%d,i%d\n",v.real(),v.imag());
auto eval2= just(complex(1,3))
|[](auto v){return complex(5,6)+v;}
|[](auto v){return complex(1,2)*v;}
|[](auto v){return complex(13,17)/v;}
;
auto v2= evaluator(eval2);
printf("%d,i%d\n",v2.real(),v2.imag());
auto eval3= just(std::string("hello"))
|[](auto v){return v+"world";}
|[](auto v){return "{"+v+"}";}
|[](auto v){return "<B>"+v+"</B>";};
printf("%s", evaluator(eval3).data());
}
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