[PATCH] Fix PR c++/16160

[Patrick Palka]

On Wed, Jan 14, 2015 at 8:26 AM, Patrick Palka <patrick@parcs.ath.cx> wrote:
> On Wed, Jan 14, 2015 at 8:05 AM, Jason Merrill <jason@redhat.com> wrote:
>> On 01/13/2015 10:54 PM, Patrick Palka wrote:
>>>
>>> +         type = error_mark_node;
>>> +         goto out;
>>
>>
>> Why exit early in the explicit instantiation cases?  Doesn't it work to give
>> the error and continue?
>>
>> Jason
>>
>
> Yes it does.  I changed it to an early exit in the last minute for no
> good reason.  But an earlier version of the patch that continued
> instead of exiting worked correctly.

Actually I recall having issues with not exiting early in the "an
explicit instantiation may not have a definition" case.  But in the
"an explicit instantiation must be preceded by template" case one
could safely continue (even though it goes on to be processed as a
forward declaration of a template specialization instead of a mistyped
explicit instantiation...)