[CodeComplete] Provide completion in decls even for incomplete types

Summary:
This change fixes lack of completions in the following case
('^'designates completion points) :

    void f(^);
    struct Incomplete;
    Incomplete g(^);

Reviewers: bkramer, aaron.ballman, sammccall

Reviewed By: aaron.ballman

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D46639

llvm-svn: 332244

1 files changed, 2 insertions, 4 deletions

diff --git a/clang/lib/Sema/SemaCodeComplete.cpp b/clang/lib/Sema/SemaCodeComplete.cpp
index 4ed9d491dd3..66b48e775b2 100644
--- a/clang/lib/Sema/SemaCodeComplete.cpp
+++ b/clang/lib/Sema/SemaCodeComplete.cpp
@@ -4493,10 +4493,8 @@ void Sema::CodeCompleteConstructor(Scope *S, QualType Type, SourceLocation Loc,
     return;
 
   // A complete type is needed to lookup for constructors.
-  if (!isCompleteType(Loc, Type))
-    return;
-
-  CXXRecordDecl *RD = Type->getAsCXXRecordDecl();
+  CXXRecordDecl *RD =
+      isCompleteType(Loc, Type) ? Type->getAsCXXRecordDecl() : nullptr;
   if (!RD) {
     CodeCompleteExpression(S, Type);
     return;