ilya-biryukov added inline comments.
================
Comment at: clang-tools-extra/clangd/index/FileIndex.cpp:86
+ // Add macro references.
+ for (const auto &IDToRefs : MacroRefsToIndex->MacroRefs) {
+ for (const auto &Range : IDToRefs.second) {
----------------
hokein wrote:
> ilya-biryukov wrote:
> > This is trying to emulate existing logic in `SymbolCollector::finish`. Is
> > there a way we could share this?
> > Would avoid creating extra copies of reference slabs and allow to keep the
> > code in one place, rather than scattering it between `FileIndex.cpp` and
> > `SymbolCollector.cpp`. Would also allow to keep `toURI` private, meaning we
> > don't have to worry about naming it and the fact it's exposed in the public
> > interface.
> >
> > One potential way to do this is to have an alternative version of
> > `handleMacroOccurence`, which would fill `SymbolCollector::MacroRefs`
> > directly and call this right after `indexTopLevelDecls`.
> > Would that work?
> +1 on the concern about performance (this is a hot function, we are paying an
> extra cost of copying all refs, which should be avoided), and the layering of
> `toURI`.
>
> > One potential way to do this is to have an alternative version of
> > handleMacroOccurence, which would fill SymbolCollector::MacroRefs directly
> > and call this right after indexTopLevelDecls.
> > Would that work?
>
> the main problem is that at this point (parsing is finished), preprocessor
> callback is not available, so we won't see macro references
> (`SymbolCollector::handleMacroOccurence` will only receive macro definitions).
>
> I think two options:
> - as mentioned above, add alternative version of `handleMacroOccurence` in
> SymbolCollector, calling it **before** `indexTopLevelDecls` (because `finish`
> is called in `indexTopLevelDecls` which we have no way to customize);
> - or we could add a finish callback to the `SymbolCollector` which is called
> in `SymbolCollector::finish`, and put this logic to the callback.
>
Thanks, good point, in my proposal we should populate macro references before
calling `indexTopLevelDecls`.
I would still suggest going with the first option, it seems simpler to me. But
up to you, @usaxena95.
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D71406/new/
https://reviews.llvm.org/D71406
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