Documentation parsing: if typedef name is being declared

via a macro, try using declaration's starting location.
This is improvement over not having a valid location and
dropping comment altogether. // rdar://14348912


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@187085 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 7 insertions, 1 deletions

diff --git a/lib/AST/ASTContext.cpp b/lib/AST/ASTContext.cpp
index 8a252f8e73..8e7b13eff0 100644
--- a/lib/AST/ASTContext.cpp
+++ b/lib/AST/ASTContext.cpp
@@ -133,8 +133,14 @@ RawComment *ASTContext::getRawCommentForDeclNoCache(const Decl *D) const {
       isa<RedeclarableTemplateDecl>(D) ||
       isa<ClassTemplateSpecializationDecl>(D))
     DeclLoc = D->getLocStart();
-  else
+  else {
     DeclLoc = D->getLocation();
+    // If location of the typedef name is in a macro, it is because being
+    // declared via a macro. Try using declaration's starting location
+    // as the "declaration location".
+    if (DeclLoc.isMacroID() && isa<TypedefDecl>(D))
+      DeclLoc = D->getLocStart();
+  }
 
   // If the declaration doesn't map directly to a location in a file, we
   // can't find the comment.