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When compiling Objective-C++, name lookup uses the C++ lookup behavior that
skips the filtering of non-implicit-self references, and will use a shadowed
name that matches the type. As a result implicit ivar access behavior differs
between Objective-C and Objective-C++, which can impact local access but also
block captures.
This addresses the issue #56193
<https://github.com/llvm/llvm-project/issues/56193> as reported on Github.
Unfortunately it appears the behavior has differed for 11 years (since the
original fix for ObjC was applied in 2011).
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D128556
Files:
clang/lib/Sema/SemaLookup.cpp
Index: clang/lib/Sema/SemaLookup.cpp
===================================================================
--- clang/lib/Sema/SemaLookup.cpp
+++ clang/lib/Sema/SemaLookup.cpp
@@ -1313,6 +1313,9 @@
R.setShadowed();
continue;
}
+ } else if (NameKind == LookupObjCImplicitSelfParam &&
+ !isa<ImplicitParamDecl>(*I)) {
+ continue;
} else {
// We found something in this scope, we should not look at the
// namespace scope
Index: clang/lib/Sema/SemaLookup.cpp
===================================================================
--- clang/lib/Sema/SemaLookup.cpp
+++ clang/lib/Sema/SemaLookup.cpp
@@ -1313,6 +1313,9 @@
R.setShadowed();
continue;
}
+ } else if (NameKind == LookupObjCImplicitSelfParam &&
+ !isa<ImplicitParamDecl>(*I)) {
+ continue;
} else {
// We found something in this scope, we should not look at the
// namespace scope
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