[Bug c/7652] -Wswitch-break : Warn if a switch case falls through

["thaines.astro at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=7652

Tim Haines <thaines.astro at gmail dot com> changed:

           What    |Removed                     |Added
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                 CC|                            |thaines.astro at gmail dot com

--- Comment #46 from Tim Haines <thaines.astro at gmail dot com> ---
(In reply to Marek Polacek from comment #45)
> Patches posted <https://gcc.gnu.org/ml/gcc-patches/2016-07/msg00532.html>.

Thank you for putting in the work to make this happen! Does the current patch
allow calling a [[noreturn]] function without the need to follow it with a call
to __builtin_fallthrough()? Something like

int i = ...;
switch (i) {
case 1:
    std::abort();
    // don't warn about fallthrough here
case 2:
    std::cout << "Hello world!\n";
    break;
}