Krystian Stasiowski 639a7ac648 [Clang][AST] Store injected template arguments in TemplateParameterList (#113579) ...

Currently, we store injected template arguments in
`RedeclarableTemplateDecl::CommonBase`. This approach has a couple
problems:
1. We can only access the injected template arguments of
`RedeclarableTemplateDecl` derived types, but other `Decl` kinds still
make use of the injected arguments (e.g.
`ClassTemplatePartialSpecializationDecl`,
`VarTemplatePartialSpecializationDecl`, and `TemplateTemplateParmDecl`).
2. Accessing the injected template arguments requires the common data
structure to be allocated. This may occur before we determine whether a
previous declaration exists (e.g. when comparing constraints), so if the
template _is_ a redeclaration, we end up discarding the common data
structure.

This patch moves the storage and access of injected template arguments
from `RedeclarableTemplateDecl` to `TemplateParameterList`.

2024-10-29 13:36:55 -04:00

70 KiB

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