1 // RUN: clang-cc -fsyntax-only -verify %s
2 
3 template<typename T> class A;
4 
5 extern "C++" {
6   template<typename T> class B;
7 }
8 
9 namespace N {
10   template<typename T> class C;
11 }
12 
13 extern "C" {
14   template<typename T> class D; // expected-error{{templates must have C++ linkage}}
15 }
16 
17 template<class U> class A; // expected-note{{previous template declaration is here}}
18 
19 template<int N> class A; // expected-error{{template parameter has a different kind in template redeclaration}}
20 
21 template<int N> class NonTypeTemplateParm;
22 
23 typedef int INT;
24 
25 template<INT M> class NonTypeTemplateParm; // expected-note{{previous non-type template parameter with type 'INT' (aka 'int') is here}}
26 
27 template<long> class NonTypeTemplateParm; // expected-error{{template non-type parameter has a different type 'long' in template redeclaration}}
28 
29 template<template<typename T> class X> class TemplateTemplateParm;
30 
31 template<template<class> class Y> class TemplateTemplateParm; // expected-note{{previous template declaration is here}} \
32       // expected-note{{previous template template parameter is here}}
33 
34 template<typename> class TemplateTemplateParm; // expected-error{{template parameter has a different kind in template redeclaration}}
35 
36 template<template<typename T, int> class X> class TemplateTemplateParm; // expected-error{{too many template parameters in template template parameter redeclaration}}
37 
38 #if 0
39 // FIXME: parse template declarations in these scopes, so that we can
40 // complain about the one at function scope.
41 class X {
42 public:
43   template<typename T> class C;
44 };
45 
46 void f() {
47   template<typename T> class X;
48 }
49 #endif
50