C++ PATCH to improve 'aka's on type printing in diagnostics

[Gabriel Dos Reis]

Jason Merrill <jason@redhat.com> writes:

| On 06/14/2011 01:38 PM, Jason Merrill wrote:
| > While I was at it, I've also tweaked the compiler to also print the
| > typedef-stripped version of a type when appropriate, which should help
| > with understanding template error messages.
| 
| I noticed that this was sometimes printing an aka that was exactly the
| same, which looks a bit goofy.  So this patch makes sure that the
| typedef-stripped version actually prints out differently before
| appending the {aka}.
| 
| Tested x86_64-pc-linux-gnu.  Gaby: I'm not entirely comfortable
| messing directly with the obstack here, but the pp interface doesn't
| seem to support multiple strings at once.  Does this approach make
| sense to you, or do you have a better idea?
| 

Hi Jason,

Please go ahead with your patch, and open a PR request for a better
interface (assigned to me).  The diagnostic machinery should support
what you want to do without people having to deal directly with the
lower-level storage management.  Thanks! 

-- Gaby