Check in LLVM r95781.
diff --git a/test/SemaTemplate/class-template-spec.cpp b/test/SemaTemplate/class-template-spec.cpp
new file mode 100644
index 0000000..efb00c7
--- /dev/null
+++ b/test/SemaTemplate/class-template-spec.cpp
@@ -0,0 +1,111 @@
+// RUN: %clang_cc1 -fsyntax-only -verify %s
+template<typename T, typename U = int> struct A; // expected-note {{template is declared here}} \
+ // expected-note{{explicitly specialized}}
+
+template<> struct A<double, double>; // expected-note{{forward declaration}}
+
+template<> struct A<float, float> { // expected-note{{previous definition}}
+ int x;
+};
+
+template<> struct A<float> { // expected-note{{previous definition}}
+ int y;
+};
+
+int test_specs(A<float, float> *a1, A<float, int> *a2) {
+ return a1->x + a2->y;
+}
+
+int test_incomplete_specs(A<double, double> *a1,
+ A<double> *a2)
+{
+ (void)a1->x; // expected-error{{member access into incomplete type}}
+ (void)a2->x; // expected-error{{implicit instantiation of undefined template 'struct A<double, int>'}}
+}
+
+typedef float FLOAT;
+
+template<> struct A<float, FLOAT>;
+
+template<> struct A<FLOAT, float> { }; // expected-error{{redefinition}}
+
+template<> struct A<float, int> { }; // expected-error{{redefinition}}
+
+template<typename T, typename U = int> struct X;
+
+template <> struct X<int, int> { int foo(); }; // #1
+template <> struct X<float> { int bar(); }; // #2
+
+typedef int int_type;
+void testme(X<int_type> *x1, X<float, int> *x2) {
+ (void)x1->foo(); // okay: refers to #1
+ (void)x2->bar(); // okay: refers to #2
+}
+
+// Make sure specializations are proper classes.
+template<>
+struct A<char> {
+ A();
+};
+
+A<char>::A() { }
+
+// Make sure we can see specializations defined before the primary template.
+namespace N{
+ template<typename T> struct A0;
+}
+
+namespace N {
+ template<>
+ struct A0<void> {
+ typedef void* pointer;
+ };
+}
+
+namespace N {
+ template<typename T>
+ struct A0 {
+ void foo(A0<void>::pointer p = 0);
+ };
+}
+
+// Diagnose specialization errors
+struct A<double> { }; // expected-error{{template specialization requires 'template<>'}}
+
+template<> struct ::A<double>;
+
+namespace N {
+ template<typename T> struct B; // expected-note 2{{explicitly specialized}}
+
+ template<> struct ::N::B<char>; // okay
+ template<> struct ::N::B<short>; // okay
+ template<> struct ::N::B<int>; // okay
+
+ int f(int);
+}
+
+template<> struct N::B<int> { }; // okay
+
+template<> struct N::B<float> { }; // expected-error{{originally}}
+
+namespace M {
+ template<> struct ::N::B<short> { }; // expected-error{{class template specialization of 'B' not in a namespace enclosing 'N'}}
+
+ template<> struct ::A<long double>; // expected-error{{originally}}
+}
+
+template<> struct N::B<char> {
+ int testf(int x) { return f(x); }
+};
+
+// PR5264
+template <typename T> class Foo;
+Foo<int>* v;
+Foo<int>& F() { return *v; }
+template <typename T> class Foo {};
+Foo<int> x;
+
+
+// Template template parameters
+template<template<class T> class Wibble>
+class Wibble<int> { }; // expected-error{{cannot specialize a template template parameter}}