1 | // RUN: %clang_cc1 -fsyntax-only -verify %s |
2 | |
3 | struct Opaque0 {}; |
4 | struct Opaque1 {}; |
5 | |
6 | // Redeclarations are okay in a namespace. |
7 | namespace test0 { |
8 | namespace ns { |
9 | void foo(Opaque0); // expected-note 2 {{candidate function}} |
10 | } |
11 | |
12 | using ns::foo; |
13 | using ns::foo; |
14 | |
15 | void test0() { |
16 | foo(Opaque1()); // expected-error {{no matching function for call}} |
17 | } |
18 | |
19 | namespace ns { |
20 | void foo(Opaque1); |
21 | } |
22 | |
23 | void test1() { |
24 | foo(Opaque1()); // expected-error {{no matching function for call}} |
25 | } |
26 | |
27 | using ns::foo; |
28 | |
29 | void test2() { |
30 | foo(Opaque1()); |
31 | } |
32 | |
33 | using ns::foo; |
34 | } |
35 | |
36 | // Make sure we handle transparent contexts the same way. |
37 | namespace test1 { |
38 | namespace ns { |
39 | void foo(Opaque0); // expected-note 2 {{candidate function}} |
40 | } |
41 | |
42 | extern "C++" { |
43 | using ns::foo; |
44 | } |
45 | |
46 | void test0() { |
47 | foo(Opaque1()); // expected-error {{no matching function for call}} |
48 | } |
49 | |
50 | namespace ns { |
51 | void foo(Opaque1); |
52 | } |
53 | |
54 | void test1() { |
55 | foo(Opaque1()); // expected-error {{no matching function for call}} |
56 | } |
57 | |
58 | extern "C++" { |
59 | using ns::foo; |
60 | } |
61 | |
62 | void test2() { |
63 | foo(Opaque1()); |
64 | } |
65 | } |
66 | |
67 | // Make sure we detect invalid redeclarations that can't be detected |
68 | // until template instantiation. |
69 | namespace test2 { |
70 | template <class T> struct Base { |
71 | typedef Base type; |
72 | void foo(); |
73 | }; |
74 | |
75 | template <class T> struct Derived : Base<T> { |
76 | // These are invalid redeclarations, detectable only after |
77 | // instantiation. |
78 | using Base<T>::foo; // expected-note {{previous using decl}} |
79 | using Base<T>::type::foo; //expected-error {{redeclaration of using decl}} |
80 | }; |
81 | |
82 | template struct Derived<int>; // expected-note {{in instantiation of template class}} |
83 | } |
84 | |
85 | // Redeclarations are okay in a function. |
86 | namespace test3 { |
87 | namespace N { |
88 | int f(int); |
89 | typedef int type; |
90 | } |
91 | |
92 | void g() { |
93 | using N::f; |
94 | using N::f; |
95 | using N::type; |
96 | using N::type; |
97 | } |
98 | } |
99 | |