[Bug libstdc++/114152] Wrong exception specifiers for LFTSv3 scope guard destructors

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114152

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I can take care of it this time, since I think I can figure out how to fix it
just from your detailed report :-) and I've already written a testcase:


// { dg-do compile { target c++20 } }

// PR libstdc++/114152
// Wrong exception specifiers for LFTSv3 scope guard destructors

#include <experimental/scope>

using namespace std::experimental;

struct F {
  void operator()() noexcept(false);
};

static_assert( noexcept(std::declval<scope_exit<F>&>().~scope_exit()) );
static_assert( noexcept(std::declval<scope_fail<F>&>().~scope_fail()) );
static_assert( ! noexcept(std::declval<scope_success<F>&>().~scope_success())
);

struct G {
  void operator()() noexcept(true);
};

static_assert( noexcept(std::declval<scope_exit<G>&>().~scope_exit()) );
static_assert( noexcept(std::declval<scope_fail<G>&>().~scope_fail()) );
static_assert( noexcept(std::declval<scope_success<G>&>().~scope_success()) );