Diagnose the declaration of explicit specializations after an implicit

instantiation has already been required. To do so, keep track of the
point of instantiation for anything that can be instantiated.

llvm-svn: 83890

1 files changed, 4 insertions, 2 deletions

diff --git a/clang/test/SemaTemplate/class-template-spec.cpp b/clang/test/SemaTemplate/class-template-spec.cpp
index 05ddb053259..e44115c748c 100644
--- a/clang/test/SemaTemplate/class-template-spec.cpp
+++ b/clang/test/SemaTemplate/class-template-spec.cpp
@@ -20,7 +20,8 @@ int test_incomplete_specs(A<double, double> *a1,
                           A<double> *a2)
 {
   (void)a1->x; // expected-error{{incomplete definition of type 'A<double, double>'}}
-  (void)a2->x; // expected-error{{implicit instantiation of undefined template 'struct A<double, int>'}}
+  (void)a2->x; // expected-error{{implicit instantiation of undefined template 'struct A<double, int>'}} \
+               // expected-note{{first required here}}
 }
 
 typedef float FLOAT;
@@ -70,7 +71,8 @@ namespace N {
 }
 
 // Diagnose specialization errors
-struct A<double> { }; // expected-error{{template specialization requires 'template<>'}}
+struct A<double> { }; // expected-error{{template specialization requires 'template<>'}} \
+                      // expected-error{{after instantiation}}
 
 template<> struct ::A<double>;