Function operator new

test/any_io_executor.cpp:30–39

static bool next_nothrow_new_fails = false;

void* operator new(std::size_t n,
    const std::nothrow_t&) noexcept
{
  if (next_nothrow_new_fails)
  {
    next_nothrow_new_fails = false;
    return 0;
  }
  return ::operator new(n);
}

struct fat_executor
{