1 | // RUN: %clang_cc1 -fsyntax-only -verify %s |
2 | // RUN: %clang_cc1 -fsyntax-only -verify -std=c++03 %s |
3 | // RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s |
4 | // PR5336 |
5 | template<typename FromCl> |
6 | struct isa_impl_cl { |
7 | template<class ToCl> |
8 | static void isa(const FromCl &Val) { } |
9 | }; |
10 | |
11 | template<class X, class Y> |
12 | void isa(const Y &Val) { return isa_impl_cl<Y>::template isa<X>(Val); } |
13 | |
14 | class Value; |
15 | void f0(const Value &Val) { isa<Value>(Val); } |
16 | |
17 | // Implicit template-ids. |
18 | template<typename T> |
19 | struct X0 { |
20 | template<typename U> |
21 | void f1(); |
22 | |
23 | template<typename U> |
24 | void f2(U) { |
25 | f1<U>(); |
26 | } |
27 | }; |
28 | |
29 | void test_X0_int(X0<int> xi, float f) { |
30 | xi.f2(f); |
31 | } |
32 | |
33 | // Not template-id expressions, but they almost look like it. |
34 | template<typename F> |
35 | struct Y { |
36 | Y(const F&); |
37 | }; |
38 | |
39 | template<int I> |
40 | struct X { |
41 | X(int, int); |
42 | void f() { |
43 | Y<X<I> >(X<I>(0, 0)); |
44 | Y<X<I> >(::X<I>(0, 0)); |
45 | } |
46 | }; |
47 | |
48 | template struct X<3>; |
49 | |
50 | // 'template' as a disambiguator. |
51 | // PR7030 |
52 | struct Y0 { |
53 | template<typename U> |
54 | void f1(U); |
55 | |
56 | template<typename U> |
57 | static void f2(U); |
58 | |
59 | void f3(int); // expected-note 2{{declared as a non-template here}} |
60 | |
61 | static int f4(int); |
62 | template<typename U> |
63 | static void f4(U); |
64 | |
65 | template<typename U> |
66 | void f() { |
67 | Y0::template f1<U>(0); |
68 | Y0::template f1(0); |
69 | this->template f1(0); |
70 | |
71 | Y0::template f2<U>(0); |
72 | Y0::template f2(0); |
73 | |
74 | Y0::template f3(0); // expected-error {{'f3' following the 'template' keyword does not refer to a template}} |
75 | Y0::template f3(); // expected-error {{'f3' following the 'template' keyword does not refer to a template}} |
76 | |
77 | int x; |
78 | x = Y0::f4(0); |
79 | x = Y0::f4<int>(0); // expected-error {{assigning to 'int' from incompatible type 'void'}} |
80 | x = Y0::template f4(0); // expected-error {{assigning to 'int' from incompatible type 'void'}} |
81 | |
82 | x = this->f4(0); |
83 | x = this->f4<int>(0); // expected-error {{assigning to 'int' from incompatible type 'void'}} |
84 | x = this->template f4(0); // expected-error {{assigning to 'int' from incompatible type 'void'}} |
85 | } |
86 | }; |
87 | |
88 | template<typename U> void Y0 |
89 | ::template // expected-error {{expected unqualified-id}} |
90 | f1(U) {} |
91 | |
92 | // FIXME: error recovery is awful without this. |
93 | ; |
94 | |
95 | template<typename T> |
96 | struct Y1 { |
97 | template<typename U> |
98 | void f1(U); |
99 | |
100 | template<typename U> |
101 | static void f2(U); |
102 | |
103 | void f3(int); // expected-note 4{{declared as a non-template here}} |
104 | |
105 | static int f4(int); |
106 | template<typename U> |
107 | static void f4(U); |
108 | |
109 | template<typename U> |
110 | void f() { |
111 | Y1::template f1<U>(0); |
112 | Y1::template f1(0); |
113 | this->template f1(0); |
114 | |
115 | Y1::template f2<U>(0); |
116 | Y1::template f2(0); |
117 | |
118 | Y1::template f3(0); // expected-error {{'f3' following the 'template' keyword does not refer to a template}} |
119 | Y1::template f3(); // expected-error {{'f3' following the 'template' keyword does not refer to a template}} |
120 | |
121 | int x; |
122 | x = Y1::f4(0); |
123 | x = Y1::f4<int>(0); // expected-error {{assigning to 'int' from incompatible type 'void'}} |
124 | x = Y1::template f4(0); // expected-error {{assigning to 'int' from incompatible type 'void'}} |
125 | |
126 | x = this->f4(0); |
127 | x = this->f4<int>(0); // expected-error {{assigning to 'int' from incompatible type 'void'}} |
128 | x = this->template f4(0); // expected-error {{assigning to 'int' from incompatible type 'void'}} |
129 | } |
130 | }; |
131 | |
132 | void use_Y1(Y1<int> y1) { y1.f<int>(); } // expected-note {{in instantiation of}} |
133 | |
134 | template<typename T> |
135 | struct Y2 : Y1<T> { |
136 | typedef ::Y1<T> Y1; |
137 | |
138 | template<typename U> |
139 | void f(Y1 *p) { |
140 | Y1::template f1<U>(0); |
141 | Y1::template f1(0); |
142 | p->template f1(0); |
143 | |
144 | Y1::template f2<U>(0); |
145 | Y1::template f2(0); |
146 | |
147 | Y1::template f3(0); // expected-error {{'f3' following the 'template' keyword does not refer to a template}} |
148 | Y1::template f3(); // expected-error {{'f3' following the 'template' keyword does not refer to a template}} |
149 | |
150 | int x; |
151 | x = Y1::f4(0); |
152 | x = Y1::f4<int>(0); // expected-error {{use 'template'}} expected-error {{assigning to 'int' from incompatible type 'void'}} |
153 | x = Y1::template f4(0); // expected-error {{assigning to 'int' from incompatible type 'void'}} |
154 | |
155 | x = p->f4(0); |
156 | x = p->f4<int>(0); // expected-error {{assigning to 'int' from incompatible type 'void'}} expected-error {{use 'template'}} |
157 | x = p->template f4(0); // expected-error {{assigning to 'int' from incompatible type 'void'}} |
158 | } |
159 | }; |
160 | |
161 | void use_Y2(Y2<int> y2) { y2.f<int>(0); } // expected-note {{in instantiation of}} |
162 | |
163 | struct A { |
164 | template<int I> |
165 | struct B { |
166 | static void b1(); // expected-note {{declared as a non-template here}} |
167 | }; |
168 | }; |
169 | |
170 | template<int I> |
171 | void f5() { |
172 | A::template B<I>::template b1(); // expected-error {{'b1' following the 'template' keyword does not refer to a template}} |
173 | } |
174 | |
175 | template void f5<0>(); // expected-note {{in instantiation of function template specialization 'f5<0>' requested here}} |
176 | |
177 | class C {}; |
178 | template <template <typename> class D> |
179 | class E { |
180 | template class D<C>; // expected-error {{expected '<' after 'template'}} |
181 | template<> class D<C>; // expected-error {{cannot specialize a template template parameter}} |
182 | friend class D<C>; // expected-error {{type alias template 'D' cannot be referenced with a class specifier}} |
183 | }; |
184 | #if __cplusplus <= 199711L |
185 | // expected-warning@+2 {{extension}} |
186 | #endif |
187 | template<typename T> using D = int; // expected-note {{declared here}} |
188 | E<D> ed; // expected-note {{instantiation of}} |
189 | |