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