jvikstrom marked an inline comment as done.
jvikstrom added inline comments.
================
Comment at: clang-tools-extra/clangd/SemanticHighlighting.cpp:177
return;
+ if (TP->isPointerType() || TP->isLValueReferenceType())
+ // When highlighting dependant template types the type can be a pointer
or
----------------
ilya-biryukov wrote:
> jvikstrom wrote:
> > ilya-biryukov wrote:
> > > `RecursiveASTVisitor` also traverses the pointer and reference types, why
> > > does it not reach the inner `TemplateTypeParmType` in the cases you
> > > describe?
> > The D in `using D = ...` `typedef ... D` does not have a TypeLoc (at least
> > not one that is visited). Therefore we use the VisitTypedefNameDecl (line
> > 121) to get the location of `D` to be able to highlight it. And we just
> > send the typeLocs typeptr to addType (which is a Pointer for `using D =
> > T*;`)...
> >
> > But maybe we should get the underlying type before we call addType with
> > TypePtr? Just a while loop on line 123 basically (can we have multiple
> > PointerTypes nested in each other actually?)
> >
> > Even if we keep it in addType the comment is actually wrong, because it
> > obviously works when for the actual "type occurrences" for `D` (so will fix
> > that no matter what). This recursion will just make us add more duplicate
> > tokens...
> Could we investigate why `RecursiveASTVisitor` does not visit the `TypeLoc`
> of a corresponding decl?
> Here's the code from `RecursiveASTVisitor.h` that should do the trick:
> ```
> DEF_TRAVERSE_DECL(TypeAliasDecl, {
> TRY_TO(TraverseTypeLoc(D->getTypeSourceInfo()->getTypeLoc()));
> // We shouldn't traverse D->getTypeForDecl(); it's a result of
> // declaring the type alias, not something that was written in the
> // source.
> })
> ```
>
> If it doesn't, we are probably holding it wrong.
There just doesn't seem to be a TypeLoc for the typedef'ed Decl. We can get
the `T*` TypeLoc (with `D->getTypeSourceInfo()->getTypeLoc()`). But there isn't
one for `D`. Even the `D->getTypeForDecl` returns null.
And I have no idea where I'd even start debugging that. Or if it's even a bug
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D66516/new/
https://reviews.llvm.org/D66516
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