| 1 | // RUN: %clang_cc1 -fsyntax-only -verify %s |
| 2 | |
| 3 | namespace PR5907 { |
| 4 | template<typename T> struct identity { typedef T type; }; |
| 5 | struct A { A(); }; |
| 6 | identity<A>::type::A() { } |
| 7 | |
| 8 | struct B { void f(); }; |
| 9 | template<typename T> struct C { typedef B type; }; |
| 10 | |
| 11 | void C<int>::type::f() { } |
| 12 | } |
| 13 | |
| 14 | namespace PR9421 { |
| 15 | namespace N { template<typename T> struct S { void f(); }; } |
| 16 | typedef N::S<int> T; |
| 17 | namespace N { template<> void T::f() {} } |
| 18 | } |
| 19 | |
| 20 | namespace PR8277 { |
| 21 | template< typename S > |
| 22 | struct C |
| 23 | { |
| 24 | template< int > |
| 25 | void F( void ) |
| 26 | { |
| 27 | } |
| 28 | }; |
| 29 | |
| 30 | template< typename S > |
| 31 | struct D |
| 32 | { |
| 33 | typedef C< int > A; |
| 34 | }; |
| 35 | |
| 36 | typedef D< int >::A A; |
| 37 | |
| 38 | template<> |
| 39 | template<> |
| 40 | void A::F< 0 >( void ) |
| 41 | { |
| 42 | } |
| 43 | } |
| 44 | |
| 45 | namespace PR8277b { |
| 46 | template<typename S> struct C { |
| 47 | void f(); |
| 48 | }; |
| 49 | template<typename S> struct D { |
| 50 | typedef C<int> A; |
| 51 | }; |
| 52 | template<> void D<int>::A::f() { |
| 53 | } |
| 54 | } |
| 55 | |
| 56 | namespace PR8708 { |
| 57 | template<typename T> struct A { |
| 58 | template<typename U> struct B { |
| 59 | // #2 |
| 60 | void f(); |
| 61 | }; |
| 62 | }; |
| 63 | |
| 64 | // #A specialize the member template for |
| 65 | // implicit instantiation of A<int>, |
| 66 | // leaving the member template "unspecialized" |
| 67 | // (14.7.3/16). Specialization uses the syntax |
| 68 | // for explicit specialization (14.7.3/14) |
| 69 | template<> template<typename U> |
| 70 | struct A<int>::B { |
| 71 | // #1 |
| 72 | void g(); |
| 73 | }; |
| 74 | |
| 75 | // #1 define its function g. There is an enclosing |
| 76 | // class template, so we write template<> for each |
| 77 | // specialized template (14.7.3/15). |
| 78 | template<> template<typename U> |
| 79 | void A<int>::B<U>::g() { } |
| 80 | |
| 81 | // #2 define the unspecialized member template's |
| 82 | // f |
| 83 | template<typename T> template<typename U> |
| 84 | void A<T>::B<U>::f() { } |
| 85 | |
| 86 | |
| 87 | // specialize the member template again, now |
| 88 | // specializing the member too. This specializes |
| 89 | // #A |
| 90 | template<> template<> |
| 91 | struct A<int>::B<int> { |
| 92 | // #3 |
| 93 | void h(); |
| 94 | }; |
| 95 | |
| 96 | // defines #3. There is no enclosing class template, so |
| 97 | // we write no "template<>". |
| 98 | void A<int>::B<int>::h() { } |
| 99 | |
| 100 | void test() { |
| 101 | // calls #1 |
| 102 | A<int>::B<float> a; a.g(); |
| 103 | |
| 104 | // calls #2 |
| 105 | A<float>::B<int> b; b.f(); |
| 106 | |
| 107 | // calls #3 |
| 108 | A<int>::B<int> c; c.h(); |
| 109 | } |
| 110 | } |
| 111 | |
| 112 | namespace PR9482 { |
| 113 | namespace N1 { |
| 114 | template <typename T> struct S { |
| 115 | void foo() {} |
| 116 | }; |
| 117 | } |
| 118 | |
| 119 | namespace N2 { |
| 120 | typedef N1::S<int> X; |
| 121 | } |
| 122 | |
| 123 | namespace N1 { |
| 124 | template<> void N2::X::foo() {} |
| 125 | } |
| 126 | } |
| 127 | |
| 128 | namespace PR9668 { |
| 129 | namespace First |
| 130 | { |
| 131 | template<class T> |
| 132 | class Bar |
| 133 | { |
| 134 | protected: |
| 135 | |
| 136 | static const bool static_bool; |
| 137 | }; |
| 138 | } |
| 139 | |
| 140 | namespace Second |
| 141 | { |
| 142 | class Foo; |
| 143 | } |
| 144 | |
| 145 | typedef First::Bar<Second::Foo> Special; |
| 146 | |
| 147 | namespace |
| 148 | First |
| 149 | { |
| 150 | template<> |
| 151 | const bool Special::static_bool(false); |
| 152 | } |
| 153 | } |
| 154 | |
| 155 | namespace PR9877 { |
| 156 | template<int> |
| 157 | struct X |
| 158 | { |
| 159 | struct Y; |
| 160 | }; |
| 161 | |
| 162 | template<> struct X<0>::Y { static const int Z = 1; }; |
| 163 | template<> struct X<1>::Y { static const int Z = 1; }; |
| 164 | |
| 165 | const int X<0>::Y::Z; |
| 166 | template<> const int X<1>::Y::Z; // expected-error{{extraneous 'template<>' in declaration of variable 'Z'}} |
| 167 | } |
| 168 | |
| 169 | namespace PR9913 { |
| 170 | template<class,class=int>struct S; |
| 171 | template<class X>struct S<X> { |
| 172 | template<class T> class F; |
| 173 | }; |
| 174 | |
| 175 | template<class A> |
| 176 | template<class B> |
| 177 | class S<A>::F{}; |
| 178 | } |
| 179 | |
| 180 | namespace template_class_spec_perClassDecl_nested |
| 181 | { |
| 182 | template <typename T1> struct A { |
| 183 | template <typename T2> struct B { |
| 184 | template <typename T3> struct C { |
| 185 | static void foo(); |
| 186 | }; |
| 187 | }; |
| 188 | }; |
| 189 | |
| 190 | template <> struct A<int> { |
| 191 | template <typename T2> struct B { |
| 192 | template <typename T3> struct C { |
| 193 | static void foo(); |
| 194 | }; |
| 195 | }; |
| 196 | }; |
| 197 | |
| 198 | template <> template <typename T3> struct A<int>::B<int>::C { |
| 199 | static void foo(); |
| 200 | }; |
| 201 | |
| 202 | template <> template <> struct A<int>::B<int>::C<int> { |
| 203 | static void foo(); |
| 204 | }; |
| 205 | |
| 206 | template <> template<> template <typename T2> struct A<bool>::B<bool>::C { |
| 207 | static void foo(); |
| 208 | }; |
| 209 | } |
| 210 | |
| 211 | |
| 212 | namespace spec_vs_expl_inst { |
| 213 | |
| 214 | // Test all permutations of Specialization, |
| 215 | // explicit instantiation Declaration, and explicit instantiation defInition. |
| 216 | |
| 217 | namespace SDI { // PR11558 |
| 218 | template <typename STRING_TYPE> class BasicStringPiece; |
| 219 | template <> class BasicStringPiece<int> { }; |
| 220 | extern template class BasicStringPiece<int>; |
| 221 | template class BasicStringPiece<int>; |
| 222 | } |
| 223 | |
| 224 | namespace SID { |
| 225 | template <typename STRING_TYPE> class BasicStringPiece; |
| 226 | template <> class BasicStringPiece<int> { }; // expected-note {{previous template specialization is here}} |
| 227 | template class BasicStringPiece<int>; // expected-note {{explicit instantiation definition is here}} expected-warning {{has no effect}} |
| 228 | extern template class BasicStringPiece<int>; // expected-error {{explicit instantiation declaration (with 'extern') follows explicit instantiation definition (without 'extern')}} |
| 229 | } |
| 230 | |
| 231 | namespace ISD { |
| 232 | template <typename STRING_TYPE> class BasicStringPiece; // expected-note {{template is declared here}} |
| 233 | template class BasicStringPiece<int>; // expected-error {{explicit instantiation of undefined template 'spec_vs_expl_inst::ISD::BasicStringPiece<int>'}} |
| 234 | template <> class BasicStringPiece<int> { }; |
| 235 | extern template class BasicStringPiece<int>; |
| 236 | } |
| 237 | |
| 238 | namespace IDS { |
| 239 | template <typename STRING_TYPE> class BasicStringPiece; // expected-note {{template is declared here}} |
| 240 | template class BasicStringPiece<int>; // expected-error {{explicit instantiation of undefined template 'spec_vs_expl_inst::IDS::BasicStringPiece<int>'}} // expected-note {{explicit instantiation definition is here}} |
| 241 | extern template class BasicStringPiece<int>; // expected-error {{explicit instantiation declaration (with 'extern') follows explicit instantiation definition (without 'extern')}} |
| 242 | template <> class BasicStringPiece<int> { }; |
| 243 | } |
| 244 | |
| 245 | namespace DIS { |
| 246 | template <typename STRING_TYPE> class BasicStringPiece; // expected-note {{template is declared here}} |
| 247 | extern template class BasicStringPiece<int>; // expected-error {{explicit instantiation of undefined template 'spec_vs_expl_inst::DIS::BasicStringPiece<int>'}} |
| 248 | template class BasicStringPiece<int>; |
| 249 | template <> class BasicStringPiece<int> { }; |
| 250 | } |
| 251 | |
| 252 | namespace DSI { |
| 253 | template <typename STRING_TYPE> class BasicStringPiece; // expected-note {{template is declared here}} |
| 254 | extern template class BasicStringPiece<int>; // expected-error {{explicit instantiation of undefined template 'spec_vs_expl_inst::DSI::BasicStringPiece<int>'}} |
| 255 | template <> class BasicStringPiece<int> { }; // expected-note {{previous}} |
| 256 | template class BasicStringPiece<int>; // expected-warning {{has no effect}} |
| 257 | } |
| 258 | |
| 259 | // The same again, with a defined template class. |
| 260 | |
| 261 | namespace SDI_WithDefinedTemplate { |
| 262 | template <typename STRING_TYPE> class BasicStringPiece {}; |
| 263 | template <> class BasicStringPiece<int> { }; |
| 264 | extern template class BasicStringPiece<int>; |
| 265 | template class BasicStringPiece<int>; |
| 266 | } |
| 267 | |
| 268 | namespace SID_WithDefinedTemplate { |
| 269 | template <typename STRING_TYPE> class BasicStringPiece {}; |
| 270 | template <> class BasicStringPiece<int> { }; // expected-note {{previous}} |
| 271 | template class BasicStringPiece<int>; // expected-note {{explicit instantiation definition is here}} expected-warning {{has no effect}} |
| 272 | extern template class BasicStringPiece<int>; // expected-error {{explicit instantiation declaration (with 'extern') follows explicit instantiation definition (without 'extern')}} |
| 273 | } |
| 274 | |
| 275 | namespace ISD_WithDefinedTemplate { |
| 276 | template <typename STRING_TYPE> class BasicStringPiece {}; |
| 277 | template class BasicStringPiece<int>; // expected-note {{explicit instantiation first required here}} |
| 278 | template <> class BasicStringPiece<int> { }; // expected-error {{explicit specialization of 'spec_vs_expl_inst::ISD_WithDefinedTemplate::BasicStringPiece<int>' after instantiation}} |
| 279 | extern template class BasicStringPiece<int>; |
| 280 | } |
| 281 | |
| 282 | namespace IDS_WithDefinedTemplate { |
| 283 | template <typename STRING_TYPE> class BasicStringPiece {}; |
| 284 | template class BasicStringPiece<int>; // expected-note {{explicit instantiation definition is here}} expected-note {{previous definition is here}} |
| 285 | extern template class BasicStringPiece<int>; // expected-error {{explicit instantiation declaration (with 'extern') follows explicit instantiation definition (without 'extern')}} |
| 286 | template <> class BasicStringPiece<int> { }; // expected-error {{redefinition of 'BasicStringPiece<int>'}} |
| 287 | } |
| 288 | |
| 289 | namespace DIS_WithDefinedTemplate { |
| 290 | template <typename STRING_TYPE> class BasicStringPiece {}; |
| 291 | extern template class BasicStringPiece<int>; // expected-note {{explicit instantiation first required here}} |
| 292 | template class BasicStringPiece<int>; |
| 293 | template <> class BasicStringPiece<int> { }; // expected-error {{explicit specialization of 'spec_vs_expl_inst::DIS_WithDefinedTemplate::BasicStringPiece<int>' after instantiation}} |
| 294 | } |
| 295 | |
| 296 | namespace DSI_WithDefinedTemplate { |
| 297 | template <typename STRING_TYPE> class BasicStringPiece {}; |
| 298 | extern template class BasicStringPiece<int>; // expected-note {{explicit instantiation first required here}} |
| 299 | template <> class BasicStringPiece<int> { }; // expected-error {{explicit specialization of 'spec_vs_expl_inst::DSI_WithDefinedTemplate::BasicStringPiece<int>' after instantiation}} |
| 300 | template class BasicStringPiece<int>; |
| 301 | } |
| 302 | |
| 303 | // And some more random tests. |
| 304 | |
| 305 | namespace SII_WithDefinedTemplate { |
| 306 | template <typename STRING_TYPE> class BasicStringPiece {}; |
| 307 | template <> class BasicStringPiece<int> { }; // expected-note {{previous}} |
| 308 | template class BasicStringPiece<int>; // expected-note {{previous explicit instantiation is here}} expected-warning {{has no effect}} |
| 309 | template class BasicStringPiece<int>; // expected-error {{duplicate explicit instantiation of 'BasicStringPiece<int>'}} |
| 310 | } |
| 311 | |
| 312 | namespace SIS { |
| 313 | template <typename STRING_TYPE> class BasicStringPiece; |
| 314 | template <> class BasicStringPiece<int> { }; // expected-note {{previous definition is here}} expected-note {{previous}} |
| 315 | template class BasicStringPiece<int>; // expected-warning {{has no effect}} |
| 316 | template <> class BasicStringPiece<int> { }; // expected-error {{redefinition of 'BasicStringPiece<int>'}} |
| 317 | } |
| 318 | |
| 319 | namespace SDS { |
| 320 | template <typename STRING_TYPE> class BasicStringPiece; |
| 321 | template <> class BasicStringPiece<int> { }; // expected-note {{previous definition is here}} |
| 322 | extern template class BasicStringPiece<int>; |
| 323 | template <> class BasicStringPiece<int> { }; // expected-error {{redefinition of 'BasicStringPiece<int>'}} |
| 324 | } |
| 325 | |
| 326 | namespace SDIS { |
| 327 | template <typename STRING_TYPE> class BasicStringPiece; |
| 328 | template <> class BasicStringPiece<int> { }; // expected-note {{previous definition is here}} |
| 329 | extern template class BasicStringPiece<int>; |
| 330 | template class BasicStringPiece<int>; |
| 331 | template <> class BasicStringPiece<int> { }; // expected-error {{redefinition of 'BasicStringPiece<int>'}} |
| 332 | } |
| 333 | |
| 334 | } |
| 335 | |