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
| // No PCH:
// RUN: %clang_cc1 -pedantic -std=c++1y -include %s -include %s -verify %s -DNONPCH
// RUN: %clang_cc1 -pedantic -std=c++1y -include %s -include %s -verify %s -DNONPCH -DERROR
//
// With PCH:
// RUN: %clang_cc1 -pedantic -std=c++1y -emit-pch %s -o %t.a -DHEADER1
// RUN: %clang_cc1 -pedantic -std=c++1y -include-pch %t.a -emit-pch %s -o %t.b -DHEADER2
// RUN: %clang_cc1 -pedantic -std=c++1y -include-pch %t.b -verify %s -DHEADERUSE
#ifndef ERROR
// expected-no-diagnostics
#endif
#ifdef NONPCH
#if !defined(HEADER1)
#define HEADER1
#undef HEADER2
#undef HEADERUSE
#elif !defined(HEADER2)
#define HEADER2
#undef HEADERUSE
#else
#define HEADERUSE
#undef HEADER1
#undef HEADER2
#endif
#endif
// *** HEADER1: First header file
#if defined(HEADER1) && !defined(HEADER2) && !defined(HEADERUSE)
template<typename T> T var0a = T();
template<typename T> extern T var0b;
namespace join {
template<typename T> T va = T(100);
template<typename T> extern T vb;
namespace diff_types {
#ifdef ERROR
template<typename T> extern float err0;
template<typename T> extern T err1;
#endif
template<typename T> extern T def;
}
}
namespace spec {
template<typename T> constexpr T va = T(10);
template<> constexpr float va<float> = 1.5;
template constexpr int va<int>;
template<typename T> T vb = T();
template<> constexpr float vb<float> = 1.5;
template<typename T> T vc = T();
template<typename T> constexpr T vd = T(10);
template<typename T> T* vd<T*> = new T();
}
namespace spec_join1 {
template<typename T> T va = T(10);
template<> extern float va<float>;
extern template int va<int>;
template<typename T> T vb = T(10);
template<> extern float vb<float>;
template<typename T> T vc = T(10);
template<typename T> T vd = T(10);
template<typename T> extern T* vd<T*>;
}
#endif
// *** HEADER2: Second header file -- including HEADER1
#if defined(HEADER2) && !defined(HEADERUSE)
namespace join {
template<typename T> extern T va;
template<> constexpr float va<float> = 2.5;
template<typename T> T vb = T(100);
namespace diff_types {
#ifdef ERROR
template<typename T> extern T err0; // expected-error {{redeclaration of 'err0' with a different type: 'T' vs 'float'}} // expected-note@42 {{previous declaration is here}}
template<typename T> extern float err1; // expected-error {{redeclaration of 'err1' with a different type: 'float' vs 'T'}} // expected-note@43 {{previous declaration is here}}
#endif
template<typename T> extern T def;
}
}
namespace spec_join1 {
template<typename T> extern T va;
template<> float va<float> = 1.5;
extern template int va<int>;
template<> float vb<float> = 1.5;
template int vb<int>;
template<> float vc<float> = 1.5;
template int vc<int>;
template<typename T> extern T vd;
template<typename T> T* vd<T*> = new T();
}
#endif
// *** HEADERUSE: File using both header files -- including HEADER2
#ifdef HEADERUSE
template int var0a<int>;
float fvara = var0a<float>;
template<typename T> extern T var0a;
template<typename T> T var0b = T();
template int var0b<int>;
float fvarb = var0b<float>;
namespace join {
template const int va<const int>;
template<> const int va<int> = 50;
static_assert(va<float> == 2.5, "");
static_assert(va<int> == 50, "");
template<> constexpr float vb<float> = 2.5;
template const int vb<const int>;
static_assert(vb<float> == 2.5, "");
static_assert(vb<const int> == 100, "");
namespace diff_types {
template<typename T> T def = T();
}
}
namespace spec {
static_assert(va<float> == 1.5, "");
static_assert(va<int> == 10, "");
template<typename T> T* vb<T*> = new T();
int* intpb = vb<int*>;
static_assert(vb<float> == 1.5, "");
template<typename T> T* vc<T*> = new T();
template<> constexpr float vc<float> = 1.5;
int* intpc = vc<int*>;
static_assert(vc<float> == 1.5, "");
char* intpd = vd<char*>;
}
namespace spec_join1 {
template int va<int>;
int a = va<int>;
template<typename T> extern T vb;
int b = vb<int>;
int* intpb = vd<int*>;
}
#endif
|