custom code block in cpp

custom code block in cpp.cc

// This file is a "Hello, world!" in C++ language by GCC for wandbox.
#include <iostream>
#include <unordered_map>
#include <optional>
#include <functional>
# define eval(a) [&](){a};
#include <iostream>
#include <functional>
struct XWorker {
  std::function<void(int, int)> func;
  XWorker(std::function<void(int, int)> x): func(x) {
    x(10, 12);
  }
  XWorker() {
  }
};
#define Parallel(X) [&](int i, int j){X};
#define Worker XWorker({[&](){X}});
#define RUN(a) auto _ = new a; delete _;
#define TASK [&](int i ,int j) 
int main() {
//  Worker {
  //  std::cout << "hello" << std::endl;
   // int i;
//  };
int capture_value=0;
   
  
RUN(
    XWorker{
        TASK {
                 std::cout << "i've got these:" << i << "," << j << std::endl;
                 capture_value = i+j;
        }
    };
)
std::cout << capture_value << '\n';
  // Worker {
  //   [](int i, int j) {
  //     return i+j;
  //   }
  // };
}