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111
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1 // Origin PR c++/33255
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2 // { dg-options "-Wunused" } <-- should trigger -Wunused-local-typedefs
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3 // { dg-do compile }
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4
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5 void
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6 test_warn()
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7 {
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8 typedef int foo; // { dg-warning "locally defined but not used" }
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9 }
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10
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11 struct S
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12 {
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13 typedef int T;
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14 S() {}
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15 S(int) {}
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16 };
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17
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18 template<class T>
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19 struct ST
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20 {
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21 typedef T type;
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22 ST (int) {}
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23 ST () {}
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24 };
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25
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26 template<class T>
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27 void
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28 test0_tmpl(void)
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29 {
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30 typedef struct ST<T> foo;
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31 foo(2);
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32 }
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33
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131
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34 void
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111
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35 test0(void)
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36 {
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37 test0_tmpl<int>();
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38 }
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39
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40 void
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41 test1(void)
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42 {
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43 typedef int foo;
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44 ST<foo> a;
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45 }
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46
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47
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48 int
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49 test2(void)
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50 {
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51 typedef S foo;
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52 foo::T i = 0;
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53 return i;
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54 }
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55
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56 template<class T>
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57 void
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58 test3_tmpl(void)
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59 {
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60 typedef struct ST<int> foo;
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61 ST<int> v;
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62 const foo __attribute__((unused))&var = v;
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63 }
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64
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65 void
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66 test3(void)
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67 {
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68 test3_tmpl<int>();
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69 }
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70
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71 void
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72 test4(void)
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73 {
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74 typedef int foo;
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75 int __attribute__((unused))vec[1] = {sizeof (foo)};
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76 }
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77
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78 void
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79 test5(void)
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80 {
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81 typedef int T0;
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82 typedef char T1;
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83 typedef int* T2;
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84 typedef unsigned T3;
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85 struct C0 { virtual void f(void) {}};
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86 struct C1 : C0 {};
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87 typedef C0 T4;
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88
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89 int v0 = (T0) 2;
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90 char __attribute__((unused)) v1 = static_cast<T1> (0);
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91 if (reinterpret_cast<T2> (&v0));
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92 unsigned* const c = 0;
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93 unsigned* __attribute__((unused))v2 = const_cast<T3* const> (c);
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94 C0 *__attribute__((unused))p0 = 0;
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95 C1 *p1 = 0;
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96 p0 = dynamic_cast<T4*> (p1);
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97 }
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98
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99 void
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100 test6(void)
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101 {
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102 struct C0 {};
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103 typedef C0 foo;
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104 C0 *__attribute__((unused))v = new foo;
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105 }
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106
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107 template<class T, class U>
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108 struct S7
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109 {
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110 void
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111 f()
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112 {
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113 typedef int foo;
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114 sizeof(foo);
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115 }
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116 };
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117
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118 template<class T>
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119 void
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120 test7(void)
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121 {
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122 typedef typename ST<T>::T bar; // { dg-warning "locally defined but not used" }
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123 typedef typename ST<T>::T foo; // We shouldn't warn for this one, as
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124 // it's used below.
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125 S7<int, foo> v;
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126 }
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127
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128
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129 template<class T, class U>
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130 void
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131 test8(void)
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132 {
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133 int f(S7<T, U>);
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134 void g(int);
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135 typedef T foo;
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136 g(f(S7<foo, U>()));
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137 }
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138
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139 int
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140 test9(void)
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141 {
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142 struct s { typedef int foo;}; // { dg-warning "locally defined but not used" }
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143 struct t { typedef int bar;};
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144 t::bar b = 0;
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145 return b;
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146 }
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