1 | // RUN: %clang_cc1 -fsyntax-only -verify -std=c++14 -Wundefined-func-template %s |
2 | |
3 | #if !defined(INCLUDE) |
4 | template <class T> struct C1 { |
5 | static char s_var_1; // expected-note{{forward declaration of template entity is here}} |
6 | static char s_var_2; // expected-note{{forward declaration of template entity is here}} |
7 | static void s_func_1(); // expected-note{{forward declaration of template entity is here}} |
8 | static void s_func_2(); // expected-note{{forward declaration of template entity is here}} |
9 | void meth_1(); // expected-note2{{forward declaration of template entity is here}} |
10 | void meth_2(); |
11 | template <class T1> static char s_tvar_2; // expected-note{{forward declaration of template entity is here}} |
12 | template <class T1> static void s_tfunc_2(); // expected-note{{forward declaration of template entity is here}} |
13 | template<typename T1> struct C2 { |
14 | static char s_var_2; // expected-note{{forward declaration of template entity is here}} |
15 | static void s_func_2(); // expected-note{{forward declaration of template entity is here}} |
16 | void meth_2(); // expected-note{{forward declaration of template entity is here}} |
17 | template <class T2> static char s_tvar_2; // expected-note{{forward declaration of template entity is here}} |
18 | template <class T2> void tmeth_2(); // expected-note{{forward declaration of template entity is here}} |
19 | }; |
20 | }; |
21 | |
22 | extern template char C1<int>::s_var_2; |
23 | extern template void C1<int>::s_func_2(); |
24 | extern template void C1<int>::meth_2(); |
25 | extern template char C1<int>::s_tvar_2<char>; |
26 | extern template void C1<int>::s_tfunc_2<char>(); |
27 | extern template void C1<int>::C2<long>::s_var_2; |
28 | extern template void C1<int>::C2<long>::s_func_2(); |
29 | extern template void C1<int>::C2<long>::meth_2(); |
30 | extern template char C1<int>::C2<long>::s_tvar_2<char>; |
31 | extern template void C1<int>::C2<long>::tmeth_2<char>(); |
32 | |
33 | char func_01() { |
34 | return C1<int>::s_var_2; |
35 | } |
36 | |
37 | char func_02() { |
38 | return C1<int>::s_var_1; // expected-warning{{instantiation of variable 'C1<int>::s_var_1' required here, but no definition is available}} |
39 | // expected-note@-1{{add an explicit instantiation declaration to suppress this warning if 'C1<int>::s_var_1' is explicitly instantiated in another translation unit}} |
40 | } |
41 | |
42 | char func_03() { |
43 | return C1<char>::s_var_2; // expected-warning{{instantiation of variable 'C1<char>::s_var_2' required here, but no definition is available}} |
44 | // expected-note@-1{{add an explicit instantiation declaration to suppress this warning if 'C1<char>::s_var_2' is explicitly instantiated in another translation unit}} |
45 | } |
46 | |
47 | void func_04() { |
48 | C1<int>::s_func_1(); // expected-warning{{instantiation of function 'C1<int>::s_func_1' required here, but no definition is available}} |
49 | // expected-note@-1{{add an explicit instantiation declaration to suppress this warning if 'C1<int>::s_func_1' is explicitly instantiated in another translation unit}} |
50 | } |
51 | |
52 | void func_05() { |
53 | C1<int>::s_func_2(); |
54 | } |
55 | |
56 | void func_06() { |
57 | C1<char>::s_func_2(); // expected-warning{{instantiation of function 'C1<char>::s_func_2' required here, but no definition is available}} |
58 | // expected-note@-1{{add an explicit instantiation declaration to suppress this warning if 'C1<char>::s_func_2' is explicitly instantiated in another translation unit}} |
59 | } |
60 | |
61 | void func_07(C1<int> *x) { |
62 | x->meth_1(); // expected-warning{{instantiation of function 'C1<int>::meth_1' required here, but no definition is available}} |
63 | // expected-note@-1{{add an explicit instantiation declaration to suppress this warning if 'C1<int>::meth_1' is explicitly instantiated in another translation unit}} |
64 | } |
65 | |
66 | void func_08(C1<int> *x) { |
67 | x->meth_2(); |
68 | } |
69 | |
70 | void func_09(C1<char> *x) { |
71 | x->meth_1(); // expected-warning{{instantiation of function 'C1<char>::meth_1' required here, but no definition is available}} |
72 | // expected-note@-1{{add an explicit instantiation declaration to suppress this warning if 'C1<char>::meth_1' is explicitly instantiated in another translation unit}} |
73 | } |
74 | |
75 | char func_10() { |
76 | return C1<int>::s_tvar_2<char>; |
77 | } |
78 | |
79 | char func_11() { |
80 | return C1<int>::s_tvar_2<long>; // expected-warning{{instantiation of variable 'C1<int>::s_tvar_2<long>' required here, but no definition is available}} |
81 | // expected-note@-1{{add an explicit instantiation declaration to suppress this warning if 'C1<int>::s_tvar_2<long>' is explicitly instantiated in another translation unit}} |
82 | } |
83 | |
84 | void func_12() { |
85 | C1<int>::s_tfunc_2<char>(); |
86 | } |
87 | |
88 | void func_13() { |
89 | C1<int>::s_tfunc_2<long>(); // expected-warning{{instantiation of function 'C1<int>::s_tfunc_2<long>' required here, but no definition is available}} |
90 | // expected-note@-1{{add an explicit instantiation declaration to suppress this warning if 'C1<int>::s_tfunc_2<long>' is explicitly instantiated in another translation unit}} |
91 | } |
92 | |
93 | char func_14() { |
94 | return C1<int>::C2<long>::s_var_2; |
95 | } |
96 | |
97 | char func_15() { |
98 | return C1<int>::C2<char>::s_var_2; //expected-warning {{instantiation of variable 'C1<int>::C2<char>::s_var_2' required here, but no definition is available}} |
99 | // expected-note@-1{{add an explicit instantiation declaration to suppress this warning if 'C1<int>::C2<char>::s_var_2' is explicitly instantiated in another translation unit}} |
100 | } |
101 | |
102 | void func_16() { |
103 | C1<int>::C2<long>::s_func_2(); |
104 | } |
105 | |
106 | void func_17() { |
107 | C1<int>::C2<char>::s_func_2(); // expected-warning{{instantiation of function 'C1<int>::C2<char>::s_func_2' required here, but no definition is available}} |
108 | // expected-note@-1{{add an explicit instantiation declaration to suppress this warning if 'C1<int>::C2<char>::s_func_2' is explicitly instantiated in another translation unit}} |
109 | } |
110 | |
111 | void func_18(C1<int>::C2<long> *x) { |
112 | x->meth_2(); |
113 | } |
114 | |
115 | void func_19(C1<int>::C2<char> *x) { |
116 | x->meth_2(); // expected-warning{{instantiation of function 'C1<int>::C2<char>::meth_2' required here, but no definition is available}} |
117 | // expected-note@-1{{add an explicit instantiation declaration to suppress this warning if 'C1<int>::C2<char>::meth_2' is explicitly instantiated in another translation unit}} |
118 | } |
119 | |
120 | char func_20() { |
121 | return C1<int>::C2<long>::s_tvar_2<char>; |
122 | } |
123 | |
124 | char func_21() { |
125 | return C1<int>::C2<long>::s_tvar_2<long>; // expected-warning{{instantiation of variable 'C1<int>::C2<long>::s_tvar_2<long>' required here, but no definition is available}} |
126 | // expected-note@-1{{add an explicit instantiation declaration to suppress this warning if 'C1<int>::C2<long>::s_tvar_2<long>' is explicitly instantiated in another translation unit}} |
127 | } |
128 | |
129 | void func_22(C1<int>::C2<long> *x) { |
130 | x->tmeth_2<char>(); |
131 | } |
132 | |
133 | void func_23(C1<int>::C2<long> *x) { |
134 | x->tmeth_2<int>(); // expected-warning{{instantiation of function 'C1<int>::C2<long>::tmeth_2<int>' required here, but no definition is available}} |
135 | // expected-note@-1{{add an explicit instantiation declaration to suppress this warning if 'C1<int>::C2<long>::tmeth_2<int>' is explicitly instantiated in another translation unit}} |
136 | } |
137 | |
138 | namespace test_24 { |
139 | template <typename T> struct X { |
140 | friend void g(int); |
141 | operator int() { return 0; } |
142 | }; |
143 | void h(X<int> x) { g(x); } // no warning for use of 'g' despite the declaration having been instantiated from a template |
144 | } |
145 | |
146 | #define INCLUDE |
147 | #include "undefined-template.cpp" |
148 | void func_25(SystemHeader<char> *x) { |
149 | x->meth(); |
150 | } |
151 | |
152 | int main() { |
153 | return 0; |
154 | } |
155 | #else |
156 | #pragma clang system_header |
157 | template <typename T> struct SystemHeader { T meth(); }; |
158 | #endif |
159 | |