forwarder.cpp

#include <iostream>
#include <memory>

#include "forwarder.hpp"
#include "fwdref.hpp"

struct S
{
  void f() const noexcept
  {
    std::cout << "Hello world!" << std::endl;
  }
};

void test(gnr::fwdref<void()> const f)
{
  f();
}

int main()
{
  S const s;

  gnr::forwarder<void(S const&) noexcept> f(&S::f);
  static_assert(noexcept(f(s)));

  f(s);

  gnr::forwarder<void(S const*) noexcept> g(&S::f);
  static_assert(noexcept(g(&s)));

  g(&s);

  gnr::forwarder<void()> h([&] { s.f(); });
  static_assert(!noexcept(h()));

  h();

  gnr::forwarder<void(std::shared_ptr<int>)> a([&](std::shared_ptr<int> p) { std::cout << p.use_count() << std::endl; });
  a(std::make_shared<int>(1));

  return 0;
}