c 2b 2b function return pointer to itself

1// To some free-function
2struct func_wrap
3{
4    using f_t = func_wrap(*)();
5    f_t func;
6    f_t operator()() const noexcept { return func; }
7    operator f_t() const noexcept { return func; }
8};
9
10using func_t = func_wrap(*)();
11
12// Function to wrap
13func_wrap foo() { return func_wrap{foo}; }
14
15func_t bar() { return foo(); }
16func_t buz() { return foo()(); }
17
18// Some functor
19struct function
20{
21   function operator()() const noexcept
22   {
23       return function();
24   }
25};
26
27function foo(int) { return function(); }
28function bar(int) { return function()(); }
29function buz(int) { return function()()(); }
30