[cfe-dev] Questions about CXXRecordDecl

[Alexander MacDonald]

On 13 Mar 2011, at 15:06, Johannes Schaub (litb) wrote:

> Alexander MacDonald wrote:
> 
>> Hi, I'm writing a small clang plugin to inspect a codebase I work on and
>> perform various custom semantic analyses. I've figured out most of what I
>> need but I've run into a couple of small problems:
>> 
>> Given a CXXRecordDecl which represents an implicitly instantiated template
>> class (mydecl->getTemplateSpecializationKind() ==
>> TSK_ImplicitInstantiation). I want to find the original unspecialized
>> CXXRecordDecl / QualType. mydecl->getDescribedClassTemplate() is returning
>> null, perhaps there's some functionality in Sema I should be using
>> instead?
>> 
> 
> It sounds like you want
> 
>    mydecl->getInstantiatedFrom()
> 
> (cast it to ClassTemplateSpecializationDecl first). If it was implicitly 
> instantiated from a primary class template (instead of a partial 
> specialization), you may need to call getTemplatedDecl() on the resulting 
> pointer to get the CXXRecordDecl of the template. 
> 
> Assuming mydecl is a "A<int>", mydecl->getDescribedClassTemplate() would 
> return true for the CXXRecordDecl of "A<T>". The class A<int> is not 
> templated, so has no class template is describes.
> 
> This is just the result of my doxygen checkup. I've no experience with clang 
> code, but it makes sense :)

That did the trick, thanks!  Somehow I missed the ClassTemplateSpecializationDecl in all my searches through the code