[libclang] Fix operations (token annotation, getting cursor, etc.) with a file region

inside an objc container that "contains" other file-level declarations.

When getting the array of file-level declarations that overlap with a file region,
we failed to report that the region overlaps with an objc container, if
the container had other file-level declarations declared lexically inside it.

Fix this by marking such declarations as "isTopLevelDeclInObjCContainer" in the AST
and handling them appropriately.

llvm-svn: 145109

1 files changed, 7 insertions, 0 deletions

diff --git a/clang/lib/Frontend/ASTUnit.cpp b/clang/lib/Frontend/ASTUnit.cpp
index 6cd07842157..a04a4403eaa 100644
--- a/clang/lib/Frontend/ASTUnit.cpp
+++ b/clang/lib/Frontend/ASTUnit.cpp
@@ -2546,6 +2546,13 @@ void ASTUnit::findFileRegionDecls(FileID File, unsigned Offset, unsigned Length,
   if (BeginIt != LocDecls.begin())
     --BeginIt;
 
+  // If we are pointing at a top-level decl inside an objc container, we need
+  // to backtrack until we find it otherwise we will fail to report that the
+  // region overlaps with an objc container.
+  while (BeginIt != LocDecls.begin() &&
+         BeginIt->second->isTopLevelDeclInObjCContainer())
+    --BeginIt;
+
   LocDeclsTy::iterator
     EndIt = std::upper_bound(LocDecls.begin(), LocDecls.end(),
                              std::make_pair(Offset+Length, (Decl*)0),