alexfh requested changes to this revision.
alexfh added inline comments.
This revision now requires changes to proceed.
================
Comment at: clang-tidy/readability/RedundantDeclarationCheck.cpp:39
+ bool MultiVar = false;
+ if (const auto *VD = dyn_cast<VarDecl>(D)) {
+ if (VD && VD->getPreviousDecl()->getStorageClass() == SC_Extern &&
----------------
danielmarjamaki wrote:
> I don't want to generate a fixit. because it could easily break the code. And
> it will probably depend on inclusion order.
Yep, not generating fixes for redundant declarations in multiple headers
totally makes sense (at least, by default).
================
Comment at: clang-tidy/readability/RedundantDeclarationCheck.cpp:45
+ for (const auto Other : VD->getDeclContext()->decls()) {
+ if (Other != D && Other->getLocStart() == VD->getLocStart()) {
+ MultiVar = true;
----------------
danielmarjamaki wrote:
> I think this is better. But not perfect. Maybe there is still a better way.
I don't know whether there is a better way. I somewhat dislike iterating over
all declarations here, but it only happens when we're about to generate a
warning anyway. Good enough for the start.
================
Comment at: clang-tidy/readability/RedundantDeclarationCheck.cpp:60
+ auto Diag = diag(D->getLocation(), "redundant '%0' declaration")
+ << cast<NamedDecl>(D)->getName();
+ if (!MultiVar && !DifferentHeaders)
----------------
It should be possible to just use `D` here.
https://reviews.llvm.org/D24656
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