1 /* PR c++/85021: Verify that we suggest missing headers for common names in std::
2 if there's a "using namespace std;" active. */
3
4 /* No using-directive. */
5
test_1()6 void test_1 ()
7 {
8 cout << "test"; // { dg-error "'cout' was not declared in this scope" }
9 // { dg-bogus "'<iostream>'" "" { target *-*-* } .-1 }
10 }
11
12 /* Local using-directive. */
13
test_2()14 void test_2 ()
15 {
16 using namespace std;
17 cout << "test"; // { dg-error "'cout' was not declared in this scope" }
18 // { dg-message "'std::cout' is defined in header '<iostream>'" "" { target *-*-* } .-1 }
19 }
20
21 /* Local using-directive, but not of "std". */
22
23 namespace not_std {}
test_3()24 void test_3 ()
25 {
26 using namespace not_std;
27 cout << "test"; // { dg-error "'cout' was not declared in this scope" }
28 // { dg-bogus "'<iostream>'" "" { target *-*-* } .-1 }
29 }
30
31 /* Local using-directive in wrong block. */
32
test_4()33 void test_4 ()
34 {
35 {
36 using namespace std;
37 }
38 cout << "test"; // { dg-error "'cout' was not declared in this scope" }
39 // { dg-bogus "'<iostream>'" "" { target *-*-* } .-1 }
40 }
41
42 /* Local using-directive used from nested block. */
43
test_5()44 void test_5 ()
45 {
46 using namespace std;
47
48 for (int i = 0; i < 10; i++)
49 {
50 cout << "test"; // { dg-error "'cout' was not declared in this scope" }
51 // { dg-message "'std::cout' is defined in header '<iostream>'" "" { target *-*-* } .-1 }
52 }
53 }
54
55 namespace ns_1 {
56
57 namespace ns_2 {
58
59 using namespace std;
60
61 /* using-directive within the same namespace. */
62
test_6()63 void test_6 ()
64 {
65 cout << "test"; // { dg-error "'cout' was not declared in this scope" }
66 // { dg-message "'std::cout' is defined in header '<iostream>'" "" { target *-*-* } .-1 }
67 }
68
69 namespace ns_3 {
70
71 /* Locate the using-directive within ns_2, the parent namespace. */
72
test_7()73 void test_7 ()
74 {
75 cout << "test"; // { dg-error "'cout' was not declared in this scope" }
76 // { dg-message "'std::cout' is defined in header '<iostream>'" "" { target *-*-* } .-1 }
77 }
78
79 } // namespace ns_3
80 } // namespace ns_2
81
82 /* Back in ns_1, should not locate the using-directive. */
83
test_8()84 void test_8 ()
85 {
86 cout << "test"; // { dg-error "'cout' was not declared in this scope" }
87 // { dg-bogus "'<iostream>'" "" { target *-*-* } .-1 }
88 }
89
90 } // namespace ns_1
91
92 /* using-directive in global namespace. */
93 using namespace std;
94
test_9()95 void test_9 ()
96 {
97 cout << "test"; // { dg-error "'cout' was not declared in this scope" }
98 // { dg-message "'std::cout' is defined in header '<iostream>'" "" { target *-*-* } .-1 }
99 }
100
101