[PATCH] D47058: [ASTImporter] Fix ClassTemplateSpecialization in wrong DC

[Gabor Marton via Phabricator via cfe-commits]

martong added a comment.

> Could you add a test for TSK_Undeclared as well?

TLDR: No, I cannot.
`TSK_Undeclared` is used to indicate that a template specialization was formed from a template-id but has not yet been declared, defined, or instantiated.
Consequently, `ClassTemplateSpecializationDecl::ClassTemplateSpecializationDecl` and `VarTemplateSpecializationDecl::VarTemplateSpecializationDecl` initializes its member `SpecializationKind` to the value `TSK_Undeclared`.
`SpecializationKind` is getting set during parsing to a meaningful kind, it is never left as `TSK_Undeclared`.
So, the only way I could write a test is to manually change the `SpecializationKind` in the "From" context, but I consider that as not a meaningful test, since we cannot create such `Decl` by the parser.


Repository:
  rC Clang

https://reviews.llvm.org/D47058