Why does this invalid-looking code compile successfully on g++ 6.0? [duplicate]

Answer 1

This looks to be an bug/feature/issue with g++ in all of the versions I can test it on. Running

int main()
{
    int(*){} Is it C++14 or any other language?
}

On godbolt.org for all versions of g++ with no compilation flags give the following assembly ouput.

main:
    pushq   %rbp
    movq    %rsp, %rbp
    movl    $0, %eax
    leave
    ret

The only diagnosis I get is on godbolt.org and that is

!!warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x

Clang, ICC and MSVS all fail to compile this.

EDIT:

From the comments zwol filed a bug with gcc on this. The bug report can be found here.