[PATCH] PR c++/69139

[Adam Butcher]

On 2016-02-08 19:14, Patrick Palka wrote:
> On Mon, 8 Feb 2016, Jason Merrill wrote:
>> On 02/08/2016 11:43 AM, Patrick Palka wrote:
>>> BTW, last month I posted a patch for this PR that handles all kinds 
>>> of
>>> specifiers as well __attribute__ specifiers.
>>> Patch is at: 
>>> https://gcc.gnu.org/ml/gcc-patches/2016-01/msg02004.html
>>> -- it makes the parser arbitrarily look ahead (while skipping over
>>> pairs of parens) until it finds a DEREF, a COMMA, a CLOSE_PAREN or 
>>> an
>>> EQ.  If it first finds a DEREF then have_trailing_return_fn_decl is
>>> set.  Dunno if it's better to have this kind of "dumb" lookahead, 
>>> or
>>> to be more explicit about one expects to consume like your followup
>>> patch does.
>>
>> Hmm, I think I prefer your approach [snip]
>
Me too.  I was worried that the cases handled in the explicit solution 
might get longer, more complex and repeat large amounts of other parser 
code.  Providing this approach gives us no false positives I would say 
it's superior.