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comparison clang/test/SemaTemplate/instantiate-member-class.cpp @ 150:1d019706d866

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LLVM10
author anatofuz
date Thu, 13 Feb 2020 15:10:13 +0900
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children 0572611fdcc8
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147:c2174574ed3a 150:1d019706d866
1 // RUN: %clang_cc1 -fsyntax-only -verify %s
2 // RUN: %clang_cc1 -fsyntax-only -verify -std=c++98 %s
3 // RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s
4
5 namespace PR8965 {
6 template<typename T>
7 struct X {
8 typedef int type;
9
10 T field; // expected-note{{in instantiation of member class}}
11 };
12
13 template<typename T>
14 struct Y {
15 struct Inner;
16
17 typedef typename X<Inner>::type // expected-note{{in instantiation of template class}}
18 type; // expected-note{{not-yet-instantiated member is declared here}}
19
20 struct Inner {
21 typedef type field; // expected-error{{no member 'type' in 'PR8965::Y<int>'; it has not yet been instantiated}}
22 };
23 };
24
25 Y<int> y; // expected-note{{in instantiation of template class}}
26 }
27
28 template<typename T>
29 class X {
30 public:
31 struct C { T &foo(); };
32
33 struct D {
34 struct E { T &bar(); }; // expected-error{{cannot form a reference to 'void'}}
35 struct F; // expected-note{{member is declared here}}
36 };
37 };
38
39 X<int>::C *c1;
40 X<float>::C *c2;
41
42 X<int>::X *xi; // expected-error{{qualified reference to 'X' is a constructor name rather than a type}}
43 X<float>::X *xf; // expected-error{{qualified reference to 'X' is a constructor name rather than a type}}
44
45 void test_naming() {
46 c1 = c2; // expected-error{{assigning to 'X<int>::C *' from incompatible type 'X<float>::C *'}}
47 xi = xf; // expected-error{{assigning to 'X<int>::X<int> *' from incompatible type 'X<float>::X<float> *'}}
48 // FIXME: error above doesn't print the type X<int>::X cleanly!
49 }
50
51 void test_instantiation(X<double>::C *x,
52 X<float>::D::E *e,
53 X<float>::D::F *f) {
54 double &dr = x->foo();
55 float &fr = e->bar();
56 f->foo(); // expected-error{{implicit instantiation of undefined member 'X<float>::D::F'}}
57
58 }
59
60
61 X<void>::C *c3; // okay
62 X<void>::D::E *e1; // okay
63 X<void>::D::E e2; // expected-note{{in instantiation of member class 'X<void>::D::E' requested here}}
64
65 // Redeclarations.
66 namespace test1 {
67 template <typename T> struct Registry {
68 struct node;
69 static node *Head;
70 struct node {
71 node(int v) { Head = this; }
72 };
73 };
74 void test() {
75 Registry<int>::node node(0);
76 }
77 }
78
79 // Redeclarations during explicit instantiations.
80 namespace test2 {
81 template <typename T> class A {
82 class Foo;
83 class Foo {
84 int foo();
85 };
86 };
87 template class A<int>;
88
89 template <typename T> class B {
90 class Foo;
91 class Foo {
92 public:
93 typedef int X;
94 };
95 typename Foo::X x;
96 };
97 template class B<int>;
98
99 template <typename T> class C {
100 class Foo;
101 };
102 template <typename T> class C<T>::Foo {
103 int x;
104 };
105 template class C<int>;
106 }
107
108 namespace AliasTagDef {
109 template<typename T>
110 struct F {
111 using S = struct U {
112 #if __cplusplus <= 199711L
113 // expected-warning@-2 {{alias declarations are a C++11 extension}}
114 #endif
115 T g() {
116 return T();
117 }
118 };
119 };
120
121 int m = F<int>::S().g();
122 int n = F<int>::U().g();
123 }
124
125 namespace rdar10397846 {
126 template<int I> struct A
127 {
128 struct B
129 {
130 struct C { C() { int *ptr = I; } };
131 #if __cplusplus >= 201103L
132 // expected-error@-2 {{cannot initialize a variable of type 'int *' with an rvalue of type 'int'}}
133 #else
134 // expected-warning@-4 {{expression which evaluates to zero treated as a null pointer constant of type 'int *'}}
135 #endif
136 // expected-error@-6 {{cannot initialize a variable of type 'int *' with an rvalue of type 'int'}}
137 };
138 };
139
140 template<int N> void foo()
141 {
142 class A<N>::B::C X; // expected-note 2 {{in instantiation of member function}}
143 int A<N+1>::B::C::*member = 0;
144 }
145
146 void bar()
147 {
148 foo<0>(); // expected-note{{in instantiation of function template}}
149 foo<1>(); // expected-note{{in instantiation of function template}}
150 }
151 }