[Bug c++/65575] [c++-concepts] Parse error for requires clause on functions that return a reference type

["tom at honermann dot net" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65575

--- Comment #5 from Tom Honermann <tom at honermann dot net> ---
r221733 seems to address the case in comment 2 for me.

I have one more for you.  This one is a little different (no return type
involved), so let me know if you want me to open a different bug for it.

$ cat t3.cpp 
struct S {
    S() = default requires true;
};

$ svn info   # From my local svn gcc repo.
Path: .
URL: svn://gcc.gnu.org/svn/gcc/branches/c++-concepts
Repository Root: svn://gcc.gnu.org/svn/gcc
Repository UUID: 138bc75d-0d04-0410-961f-82ee72b054a4
Revision: 221742
Node Kind: directory
Schedule: normal
Last Changed Author: asutton
Last Changed Rev: 221733
Last Changed Date: 2015-03-27 10:44:22 -0400 (Fri, 27 Mar 2015)

$ g++ -c -std=c++1z t3.cpp 
t3.cpp:2:11: error: expected â;â at end of member declaration
     S() = default requires true;
           ^
t3.cpp:2:19: error: expected unqualified-id before ârequiresâ
     S() = default requires true;
                   ^