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131
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1 /* PR c++/85021: Verify that we suggest missing headers for common names in std::
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2 if there's a "using namespace std;" active. */
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3
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4 /* No using-directive. */
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5
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6 void test_1 ()
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7 {
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8 cout << "test"; // { dg-error "'cout' was not declared in this scope" }
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9 // { dg-bogus "'<iostream>'" "" { target *-*-* } .-1 }
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10 }
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11
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12 /* Local using-directive. */
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13
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14 void test_2 ()
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15 {
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16 using namespace std;
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17 cout << "test"; // { dg-error "'cout' was not declared in this scope" }
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18 // { dg-message "'std::cout' is defined in header '<iostream>'" "" { target *-*-* } .-1 }
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19 }
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20
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21 /* Local using-directive, but not of "std". */
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22
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23 namespace not_std {}
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24 void test_3 ()
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25 {
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26 using namespace not_std;
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27 cout << "test"; // { dg-error "'cout' was not declared in this scope" }
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28 // { dg-bogus "'<iostream>'" "" { target *-*-* } .-1 }
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29 }
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30
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31 /* Local using-directive in wrong block. */
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32
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33 void test_4 ()
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34 {
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35 {
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36 using namespace std;
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37 }
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38 cout << "test"; // { dg-error "'cout' was not declared in this scope" }
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39 // { dg-bogus "'<iostream>'" "" { target *-*-* } .-1 }
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40 }
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41
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42 /* Local using-directive used from nested block. */
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43
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44 void test_5 ()
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45 {
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46 using namespace std;
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47
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48 for (int i = 0; i < 10; i++)
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49 {
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50 cout << "test"; // { dg-error "'cout' was not declared in this scope" }
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51 // { dg-message "'std::cout' is defined in header '<iostream>'" "" { target *-*-* } .-1 }
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52 }
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53 }
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54
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55 namespace ns_1 {
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56
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57 namespace ns_2 {
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58
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59 using namespace std;
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60
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61 /* using-directive within the same namespace. */
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62
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63 void test_6 ()
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64 {
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65 cout << "test"; // { dg-error "'cout' was not declared in this scope" }
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66 // { dg-message "'std::cout' is defined in header '<iostream>'" "" { target *-*-* } .-1 }
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67 }
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68
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69 namespace ns_3 {
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70
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71 /* Locate the using-directive within ns_2, the parent namespace. */
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72
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73 void test_7 ()
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74 {
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75 cout << "test"; // { dg-error "'cout' was not declared in this scope" }
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76 // { dg-message "'std::cout' is defined in header '<iostream>'" "" { target *-*-* } .-1 }
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77 }
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78
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79 } // namespace ns_3
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80 } // namespace ns_2
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81
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82 /* Back in ns_1, should not locate the using-directive. */
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83
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84 void test_8 ()
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85 {
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86 cout << "test"; // { dg-error "'cout' was not declared in this scope" }
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87 // { dg-bogus "'<iostream>'" "" { target *-*-* } .-1 }
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88 }
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89
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90 } // namespace ns_1
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91
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92 /* using-directive in global namespace. */
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93 using namespace std;
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94
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95 void test_9 ()
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96 {
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97 cout << "test"; // { dg-error "'cout' was not declared in this scope" }
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98 // { dg-message "'std::cout' is defined in header '<iostream>'" "" { target *-*-* } .-1 }
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99 }
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100
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