1 | // RUN: %clang_cc1 -fsyntax-only -verify -std=c++98 %s |
2 | // RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s |
3 | struct X0 { |
4 | X0(); |
5 | X0(int); |
6 | X0 f1(); |
7 | X0 f2(); |
8 | typedef int A; |
9 | typedef X0 B; |
10 | }; |
11 | |
12 | template<typename T> |
13 | struct X1 : X0 { |
14 | X1(); |
15 | X1<T>(int); |
16 | (X1<T>)(float); |
17 | X1 f2(); |
18 | X1 f2(int); |
19 | X1 f2(float); |
20 | X1 f2(double); |
21 | X1 f2(short); |
22 | X1 f2(long); |
23 | }; |
24 | |
25 | // Error recovery: out-of-line constructors whose names have template arguments. |
26 | template<typename T> X1<T>::X1<T>(int) { } // expected-error{{out-of-line constructor for 'X1' cannot have template arguments}} |
27 | template<typename T> (X1<T>::X1<T>)(float) { } // expected-error{{out-of-line constructor for 'X1' cannot have template arguments}} |
28 | |
29 | // Error recovery: out-of-line constructor names intended to be types |
30 | X0::X0 X0::f1() { return X0(); } // expected-error{{qualified reference to 'X0' is a constructor name rather than a type in this context}} |
31 | |
32 | struct X0::X0 X0::f2() { return X0(); } |
33 | |
34 | template<typename T> X1<T>::X1<T> X1<T>::f2() { } // expected-error{{missing 'typename'}} |
35 | template<typename T> X1<T>::X1<T> (X1<T>::f2)(int) { } // expected-error{{missing 'typename'}} |
36 | template<typename T> struct X1<T>::X1<T> (X1<T>::f2)(float) { } |
37 | template<typename T> struct X1<T>::X1 (X1<T>::f2)(double) { } |
38 | template<typename T> typename X1<T>::template X1<T> X1<T>::f2(short) { } // expected-warning {{qualified reference to 'X1' is a constructor name rather than a template name in this context}} |
39 | template<typename T> typename X1<T>::template X1<T> (X1<T>::f2)(long) { } // expected-warning {{qualified reference to 'X1' is a constructor name rather than a template name in this context}} |
40 | |
41 | void x1test(X1<int> x1i) { |
42 | x1i.f2(); |
43 | x1i.f2(0); |
44 | x1i.f2(0.f); |
45 | x1i.f2(0.); |
46 | } |
47 | |
48 | void other_contexts() { |
49 | X0::X0 x0; // expected-error{{qualified reference to 'X0' is a constructor name rather than a type in this context}} |
50 | X1<int>::X1 x1a; // expected-error{{qualified reference to 'X1' is a constructor name rather than a type in this context}} |
51 | X1<int>::X1<float> x1b; // expected-error{{qualified reference to 'X1' is a constructor name rather than a template name in this context}} |
52 | |
53 | X0::B ok1; |
54 | X0::X0::A ok2; |
55 | X0::X0::X0 x0b; // expected-error{{qualified reference to 'X0' is a constructor name rather than a type in this context}} |
56 | X1<int>::X0 ok3; |
57 | X1<int>::X0::X0 x0c; // expected-error{{qualified reference to 'X0' is a constructor name rather than a type in this context}} |
58 | X1<int>::X1<float>::X0 ok4; |
59 | |
60 | { |
61 | typename X0::X0 tn1; // expected-warning{{qualified reference to 'X0' is a constructor name rather than a type in this context}} expected-warning 0-1{{typename}} |
62 | typename X1<int>::X1<float> tn2; // expected-warning{{qualified reference to 'X1' is a constructor name rather than a template name in this context}} expected-warning 0-1{{typename}} |
63 | typename X0::B ok1; // expected-warning 0-1{{typename}} |
64 | typename X1<int>::X0 ok2; // expected-warning 0-1{{typename}} |
65 | } |
66 | |
67 | { |
68 | struct X0::X0 tag1; |
69 | struct X1<int>::X1 tag2; |
70 | struct X1<int>::X1<int> tag3; |
71 | } |
72 | |
73 | int a; |
74 | { |
75 | X0::X0(a); // expected-error{{qualified reference to 'X0' is a constructor name rather than a type in this context}} |
76 | // expected-warning@-1 {{redundant parentheses around declaration of variable named 'a'}} expected-note@-1 2{{}} |
77 | } |
78 | } |
79 | |
80 | template<typename T> void in_instantiation_x0() { |
81 | typename T::X0 x0; // expected-warning{{qualified reference to 'X0' is a constructor name rather than a type in this context}} |
82 | typename T::A a; |
83 | typename T::B b; |
84 | } |
85 | template void in_instantiation_x0<X0>(); // expected-note {{instantiation of}} |
86 | |
87 | template<typename T> void in_instantiation_x1() { |
88 | typename T::X1 x1; // expected-warning{{qualified reference to 'X1' is a constructor name rather than a type in this context}} |
89 | typename T::template X1<int> x1i; // expected-warning{{qualified reference to 'X1' is a constructor name rather than a template name in this context}} |
90 | typename T::X0 x0; |
91 | } |
92 | template void in_instantiation_x1<X1<int> >(); // expected-note {{instantiation of}} |
93 | |
94 | namespace sfinae { |
95 | template<typename T> void f(typename T::X0 *) = delete; // expected-warning 0-1{{extension}} |
96 | template<typename T> void f(...); |
97 | void g() { f<X0>(0); } |
98 | } |
99 | |
100 | namespace versus_injected_class_name { |
101 | template <typename T> struct A : T::B { |
102 | struct T::B *p; |
103 | typename T::B::type a; |
104 | A() : T::B() {} |
105 | |
106 | typename T::B b; // expected-warning {{qualified reference to 'B' is a constructor name rather than a type in this context}} |
107 | }; |
108 | struct B { |
109 | typedef int type; |
110 | }; |
111 | template struct A<B>; // expected-note {{in instantiation of}} |
112 | } |
113 | |
114 | // We have a special case for lookup within using-declarations that are |
115 | // member-declarations: foo::bar::baz::baz always names baz's constructor |
116 | // in such a context, even if looking up 'baz' within foo::bar::baz would |
117 | // not find the injected-class-name. Likewise foo::bar::baz<T>::baz also |
118 | // names the constructor. |
119 | namespace InhCtor { |
120 | struct A { |
121 | A(int); |
122 | protected: |
123 | int T(); |
124 | }; |
125 | typedef A T; |
126 | struct B : A { |
127 | // This is a using-declaration for 'int A::T()' in C++98, but is an |
128 | // inheriting constructor declaration in C++11. |
129 | using InhCtor::T::T; |
130 | }; |
131 | #if __cplusplus < 201103L |
132 | B b(123); // expected-error {{no matching constructor}} |
133 | // expected-note@-7 2{{candidate constructor}} |
134 | int n = b.T(); // ok, accessible |
135 | #else |
136 | B b(123); // ok, inheriting constructor |
137 | int n = b.T(); // expected-error {{'T' is a protected member of 'InhCtor::A'}} |
138 | // expected-note@-15 {{declared protected here}} |
139 | |
140 | // FIXME: EDG and GCC reject this too, but it's not clear why it would be |
141 | // ill-formed. |
142 | template<typename T> |
143 | struct S : T { |
144 | struct U : S { // expected-note 6{{candidate}} |
145 | using S::S; |
146 | }; |
147 | using T::T; |
148 | }; |
149 | S<A>::U ua(0); // expected-error {{no match}} |
150 | S<B>::U ub(0); // expected-error {{no match}} |
151 | |
152 | template<typename T> |
153 | struct X : T { |
154 | using T::Z::U::U; |
155 | }; |
156 | template<typename T> |
157 | struct X2 : T { |
158 | using T::Z::template V<int>::V; |
159 | }; |
160 | struct Y { |
161 | struct Z { |
162 | typedef Y U; |
163 | template<typename T> using V = Y; |
164 | }; |
165 | Y(int); |
166 | }; |
167 | X<Y> xy(0); |
168 | |
169 | namespace Repeat { |
170 | struct A { |
171 | struct T { |
172 | T(int); |
173 | }; |
174 | }; |
175 | struct Z : A { |
176 | using A::A::A; |
177 | }; |
178 | template<typename T> |
179 | struct ZT : T::T { |
180 | using T::T::T; |
181 | }; |
182 | } |
183 | |
184 | namespace NS { |
185 | struct NS {}; |
186 | } |
187 | struct DerivedFromNS : NS::NS { |
188 | // No special case unless the NNS names a class. |
189 | using InhCtor::NS::NS; // expected-error {{using declaration in class refers into 'InhCtor::NS::', which is not a class}} |
190 | |
191 | }; |
192 | |
193 | // FIXME: Consider reusing the same diagnostic between dependent and non-dependent contexts |
194 | typedef int I; |
195 | struct UsingInt { |
196 | using I::I; // expected-error {{'InhCtor::I' (aka 'int') is not a class, namespace, or enumeration}} |
197 | }; |
198 | template<typename T> struct UsingIntTemplate { |
199 | using T::T; // expected-error {{type 'int' cannot be used prior to '::' because it has no members}} |
200 | }; |
201 | UsingIntTemplate<int> uit; // expected-note {{here}} |
202 | |
203 | // This case is odd: we don't name the constructor of a dependent base as |
204 | // Base::Base, but we still happen to have enough information to identify |
205 | // when parsing the template that we're inheriting constructors. |
206 | // |
207 | // FIXME: Once CWG 2070 is resolved, check whether this case should be |
208 | // accepted or not. |
209 | namespace DependentCtorName { |
210 | template <typename T> struct B { B(int); }; |
211 | template <typename T> struct A : B<T> { |
212 | using X = B<T>; |
213 | using X::B; |
214 | }; |
215 | A<int> ab = 0; |
216 | } |
217 | #endif |
218 | } |
219 | |