Look at incomplete FunctionTemplateDecls in order to determine whether

a CXXRecordDecl is complete. Fixes Bug 13086.

llvm-svn: 158469

2 files changed, 9 insertions, 0 deletions

diff --git a/clang/lib/Sema/Sema.cpp b/clang/lib/Sema/Sema.cpp
index e0d405d175f..39338f983e5 100644
--- a/clang/lib/Sema/Sema.cpp
+++ b/clang/lib/Sema/Sema.cpp
@@ -444,6 +444,8 @@ static bool MethodsAndNestedClassesComplete(const CXXRecordDecl *RD,
        I != E && Complete; ++I) {
     if (const CXXMethodDecl *M = dyn_cast<CXXMethodDecl>(*I))
       Complete = M->isDefined() || (M->isPure() && !isa<CXXDestructorDecl>(M));
+    else if (const FunctionTemplateDecl *F = dyn_cast<FunctionTemplateDecl>(*I))
+      Complete = F->getTemplatedDecl()->isDefined();
     else if (const CXXRecordDecl *R = dyn_cast<CXXRecordDecl>(*I)) {
       if (R->isInjectedClassName())
         continue;
diff --git a/clang/test/SemaCXX/warn-unused-member.cpp b/clang/test/SemaCXX/warn-unused-member.cpp
index 00de8a97aca..9ec9df66ec7 100644
--- a/clang/test/SemaCXX/warn-unused-member.cpp
+++ b/clang/test/SemaCXX/warn-unused-member.cpp
@@ -142,6 +142,13 @@ class EverythingUsed {
   int by_initializer_;
 };
 
+namespace templates {
+class B {
+  template <typename T> void f(T t);
+  int a;
+};
+}  // namespace templates
+
 namespace mutual_friends {
 // Undefined methods make mutual friends undefined.
 class A {