hello.cpp

  #include <iostream>

  #include <CL/sycl.hpp>

  namespace sycl = cl::sycl;

  int main(int, char**) {
    sycl::float4 a = { 1.0, 2.0, 3.0, 4.0 };
    sycl::float4 b = { 4.0, 3.0, 2.0, 1.0 };
    sycl::float4 c = { 0.0, 0.0, 0.0, 0.0 };
    sycl::default_selector device_selector;
    sycl::queue queue(device_selector);
    std::cout << "Running on "
        << queue.get_device().get_info<sycl::info::device::name>()
        << "\n";

    //When stuff goes out of scope, it gets freed (we wait for the GPU to finish)
    //Hence the brackets
    {
      sycl::buffer<sycl::float4, 1> a_sycl(&a, sycl::range<1>(1));
      sycl::buffer<sycl::float4, 1> b_sycl(&b, sycl::range<1>(1));
      sycl::buffer<sycl::float4, 1> c_sycl(&c, sycl::range<1>(1));

      queue.submit([&] (sycl::handler& cgh) {
            auto a_acc = a_sycl.get_access<sycl::access::mode::read>(cgh);
            auto b_acc = b_sycl.get_access<sycl::access::mode::read>(cgh);
            auto c_acc = c_sycl.get_access<sycl::access::mode::discard_write>(cgh);

            cgh.single_task<class vector_addition>([=] () {
              c_acc[0] = a_acc[0] + b_acc[0];
        });
      });
    }

   std::cout << "  A { " << a.x() << ", " << a.y() << ", " << a.z() << ", " << a.w() << " }\n"
        << "+ B { " << b.x() << ", " << b.y() << ", " << b.z() << ", " << b.w() << " }\n"
        << "------------------\n"
        << "= C { " << c.x() << ", " << c.y() << ", " << c.z() << ", " << c.w() << " }"
        << std::endl;
    return 0;
  }