1 | // RUN: %clang_cc1 -fsyntax-only -verify %s |
2 | // RUN: %clang_cc1 -fsyntax-only -verify -std=c++98 %s |
3 | // RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s |
4 | |
5 | template<template<typename T> class X> struct A; // expected-note 2{{previous template template parameter is here}} |
6 | |
7 | template<template<typename T, int I> class X> struct B; // expected-note{{previous template template parameter is here}} |
8 | |
9 | template<template<int I> class X> struct C; // expected-note 2{{previous non-type template parameter with type 'int' is here}} |
10 | |
11 | template<class> struct X; // expected-note{{too few template parameters in template template argument}} |
12 | template<int N> struct Y; // expected-note{{template parameter has a different kind in template argument}} |
13 | template<long N> struct Ylong; // expected-note{{template non-type parameter has a different type 'long' in template argument}} |
14 | template<const int &N> struct Yref; // expected-note{{template non-type parameter has a different type 'const int &' in template argument}} |
15 | |
16 | namespace N { |
17 | template<class> struct Z; |
18 | } |
19 | template<class, class> struct TooMany; // expected-note{{too many template parameters in template template argument}} |
20 | |
21 | |
22 | A<X> *a1; |
23 | A<N::Z> *a2; |
24 | A< ::N::Z> *a3; |
25 | |
26 | A<Y> *a4; // expected-error{{template template argument has different template parameters than its corresponding template template parameter}} |
27 | A<TooMany> *a5; // expected-error{{template template argument has different template parameters than its corresponding template template parameter}} |
28 | B<X> *a6; // expected-error{{template template argument has different template parameters than its corresponding template template parameter}} |
29 | C<Y> *a7; |
30 | C<Ylong> *a8; // expected-error{{template template argument has different template parameters than its corresponding template template parameter}} |
31 | C<Yref> *a9; // expected-error{{template template argument has different template parameters than its corresponding template template parameter}} |
32 | |
33 | template<typename T> void f(int); |
34 | |
35 | A<f> *a9; // expected-error{{must be a class template}} |
36 | |
37 | // Evil digraph '<:' is parsed as '[', expect error. |
38 | A<::N::Z> *a10; |
39 | #if __cplusplus <= 199711L |
40 | // expected-error@-2 {{found '<::' after a template name which forms the digraph '<:' (aka '[') and a ':', did you mean '< ::'?}} |
41 | #endif |
42 | |
43 | // Do not do a digraph correction here. |
44 | A<: :N::Z> *a11; // expected-error{{expected expression}} \ |
45 | expected-error{{C++ requires a type specifier for all declarations}} |
46 | |
47 | // PR7807 |
48 | namespace N { |
49 | template <typename, typename = int> |
50 | struct X |
51 | { }; |
52 | |
53 | template <typename ,int> |
54 | struct Y |
55 | { X<int> const_ref(); }; |
56 | |
57 | template <template<typename,int> class TT, typename T, int N> |
58 | int operator<<(int, TT<T, N> a) { // expected-note{{candidate template ignored}} |
59 | 0 << a.const_ref(); // expected-error{{invalid operands to binary expression ('int' and 'X<int>')}} |
60 | } |
61 | |
62 | void f0( Y<int,1> y){ 1 << y; } // expected-note{{in instantiation of function template specialization 'N::operator<<<Y, int, 1>' requested here}} |
63 | } |
64 | |
65 | // PR12179 |
66 | template <typename Primitive, template <Primitive...> class F> |
67 | #if __cplusplus <= 199711L |
68 | // expected-warning@-2 {{variadic templates are a C++11 extension}} |
69 | #endif |
70 | |
71 | struct unbox_args { |
72 | typedef typename Primitive::template call<F> x; |
73 | }; |
74 | |
75 | template <template <typename> class... Templates> |
76 | #if __cplusplus <= 199711L |
77 | // expected-warning@-2 {{variadic templates are a C++11 extension}} |
78 | #endif |
79 | |
80 | struct template_tuple { |
81 | #if __cplusplus >= 201103L |
82 | static constexpr int N = sizeof...(Templates); |
83 | #endif |
84 | }; |
85 | template <typename T> |
86 | struct identity {}; |
87 | template <template <typename> class... Templates> |
88 | #if __cplusplus <= 199711L |
89 | // expected-warning@-2 {{variadic templates are a C++11 extension}} |
90 | #endif |
91 | |
92 | template_tuple<Templates...> f7() {} |
93 | |
94 | #if __cplusplus >= 201103L |
95 | struct S : public template_tuple<identity, identity> { |
96 | static_assert(N == 2, "Number of template arguments incorrect"); |
97 | }; |
98 | #endif |
99 | |
100 | void foo() { |
101 | f7<identity>(); |
102 | } |
103 | |
104 | namespace CheckDependentNonTypeParamTypes { |
105 | template<template<typename T, typename U, T v> class X> struct A { |
106 | void f() { |
107 | X<int, void*, 3> x; // expected-error {{does not refer to any declaration}} |
108 | } |
109 | void g() { |
110 | X<int, long, 3> x; |
111 | } |
112 | void h() { |
113 | // FIXME: If we accept A<B> at all, it's not obvious what should happen |
114 | // here. While parsing the template, we form |
115 | // X<unsigned char, int, (unsigned char)1234> |
116 | // but in the final instantiation do we get |
117 | // B<unsigned char, int, (int)1234> |
118 | // or |
119 | // B<unsigned char, int, (int)(unsigned char)1234> |
120 | // ? |
121 | X<unsigned char, int, 1234> x; |
122 | int check[x.value == 1234 ? 1 : -1]; |
123 | } |
124 | }; |
125 | |
126 | template<typename T, typename U, U v> struct B { // expected-note {{parameter}} |
127 | static const U value = v; |
128 | }; |
129 | |
130 | // FIXME: This should probably be rejected, but the rules are at best unclear. |
131 | A<B> ab; |
132 | |
133 | void use() { |
134 | ab.f(); // expected-note {{instantiation of}} |
135 | ab.g(); |
136 | ab.h(); |
137 | } |
138 | } |
139 | |
140 | namespace PR32185 { |
141 | template<template<typename T, T> class U> struct A {}; |
142 | template<template<typename T, T> class U> struct B : A<U> {}; |
143 | } |
144 | |
145 | namespace PR10147 { |
146 | template<typename T> struct A {}; |
147 | template<typename T = int> struct A; |
148 | template<template<typename...> class A> void f(A<int>*) { A<> a; } // expected-warning 0-1{{extension}} |
149 | void g() { f((A<>*)0); } |
150 | } |
151 | |