1 | // RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s |
2 | |
3 | // If a template-parameter of a class template or alias template has a default |
4 | // template-argument, each subsequent template-parameter shall either have a |
5 | // default template-argument supplied or be a template parameter pack. |
6 | template<typename> struct vector; |
7 | |
8 | template<typename T = int, typename> struct X3t; // expected-error{{template parameter missing a default argument}} expected-note{{previous default template argument defined here}} |
9 | template<typename T = int, typename> using A3t = int; // expected-error{{template parameter missing a default argument}} expected-note{{previous default template argument defined here}} |
10 | template<int V = 0, int> struct X3nt; // expected-error{{template parameter missing a default argument}} expected-note{{previous default template argument defined here}} |
11 | template<int V = 0, int> using A3nt = int; // expected-error{{template parameter missing a default argument}} expected-note{{previous default template argument defined here}} |
12 | template<template<class> class M = vector, template<class> class> struct X3tt; // expected-error{{template parameter missing a default argument}} expected-note{{previous default template argument defined here}} |
13 | template<template<class> class M = vector, template<class> class> using A3tt = int; // expected-error{{template parameter missing a default argument}} expected-note{{previous default template argument defined here}} |
14 | |
15 | template<typename T = int, typename ...Types> struct X2t; |
16 | template<typename T = int, typename ...Types> using A2t = X2t<T, Types...>; |
17 | template<int V = 0, int ...Values> struct X2nt; |
18 | template<int V = 0, int ...Values> using A2nt = X2nt<V, Values...>; |
19 | template<template<class> class M = vector, template<class> class... Metas> |
20 | struct X2tt; |
21 | template<template<class> class M = vector, template<class> class... Metas> |
22 | using A2tt = X2tt<M, Metas...>; |
23 | |
24 | // If a template-parameter of a primary class template or alias template is a |
25 | // template parameter pack, it shall be the last template-parameter. |
26 | template<typename ...Types, // expected-error{{template parameter pack must be the last template parameter}} |
27 | int After, int After2> |
28 | struct X0t; |
29 | X0t<int> pr9789(); |
30 | template<typename ...Types, // expected-error{{template parameter pack must be the last template parameter}} |
31 | int After> |
32 | using A0t = int; |
33 | |
34 | template<int ...Values, // expected-error{{template parameter pack must be the last template parameter}} |
35 | int After> |
36 | struct X0nt; |
37 | template<int ...Values, // expected-error{{template parameter pack must be the last template parameter}} |
38 | int After> |
39 | using A0nt = int; |
40 | |
41 | template<template<typename> class ...Templates, // expected-error{{template parameter pack must be the last template parameter}} |
42 | int After> |
43 | struct X0tt; |
44 | template<template<typename> class ...Templates, // expected-error{{template parameter pack must be the last template parameter}} |
45 | int After> |
46 | using A0tt = int; |
47 | |
48 | // [ Note: These are not requirements for function templates or class |
49 | // template partial specializations because template arguments can be |
50 | // deduced (14.8.2). -- end note] |
51 | template<typename... Types> struct X1t; |
52 | template<typename ...Types, typename T> struct X1t<T, Types...> { }; |
53 | |
54 | template<int... Values> struct X1nt; |
55 | template<int ...Values, int V> struct X1nt<V, Values...> { }; |
56 | |
57 | template<template<int> class... Meta> struct X1tt; |
58 | template<template<int> class... Meta, template<int> class M> |
59 | struct X1tt<M, Meta...> { }; |
60 | |
61 | template<typename ...Types, typename T> |
62 | void f1t(X1t<T, Types...>); |
63 | |
64 | template<int ...Values, int V> |
65 | void f1nt(X1nt<V, Values...>); |
66 | |
67 | template<template<int> class... Meta, template<int> class M> |
68 | void f1tt(X1tt<M, Meta...>); |
69 | |
70 | namespace DefaultTemplateArgsInFunction { |
71 | template<typename T = int, typename U> T &f0(U) { T *x = 0; return *x; } |
72 | |
73 | void test_f0() { |
74 | int &ir0 = f0(3.14159); |
75 | int &ir1 = f0<int>(3.14159); |
76 | float &fr0 = f0<float>(3.14159); |
77 | } |
78 | |
79 | template<> int &f0(int*); |
80 | template int &f0(double&); |
81 | } |
82 | |