[cfe-dev] Location of a TypeAliasDecl from a TemplateSpecializationType

[David Blaikie]

On Sun, Apr 6, 2014 at 2:09 AM, Richard Smith <richard at metafoo.co.uk> wrote:
> On Sun, Apr 6, 2014 at 12:21 AM, David Blaikie <dblaikie at gmail.com> wrote:
>>
>> Is it possible to retrieve the location of a TypeAliasDecl from a
>> TemplateSpecializationType representing an alias template?
>
>
> Something like:
>
>
> cast<TypeAliasTemplateDecl>(TST->getTemplateName()->getTemplateDecl())->getTemplatedDecl()

Oh, thanks - didn't think to look inside the TemplateName for more
details... good to know.

Used to implement debug info for alias templates in 205691.

> (plus error checking).

>From what I could tell in the docs the error cases won

>> It looks like the connection between the type and the original decl is
>> lost during construction - I guess it could/should be persisted? (in a
>> manner similar to TypedefType, for example)
>>
>> I don't need the alias template to have specializations like a real
>> template, so the decl that the TemplateSpecializationType points to
>> can just be the TypeAliasDecl which is generic/defined in terms of
>> template arguments.
>>
>> Specifically what I need is the location and the DeclContext where the
>> alias was written so I can accurately describe the alias in the debug
>> info.
>>
>> Thanks,
>> - David
>
>