compilerplugins/clang/test/unusedmember.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  */
   9
  10 namespace Enum
  11 {
  12 namespace
  13 {
  14 struct S
  15 {
  16     enum E
  17     {
  18         E1,
  19         E2
  20     };
  21     E e;
  22 };
  23 }
  24 void f(S s) { (void)s.e; }
  25 }
  26
  27 namespace ElaboratedEnum
  28 {
  29 namespace
  30 {
  31 struct S
  32 {
  33     S()
  34     {
  35         enum E1 e1 = E11;
  36         (void)e1;
  37     }
  38     enum E1
  39     {
  40         E11,
  41         E12
  42     };
  43     enum E2
  44     {
  45         E21,
  46         E22
  47     };
  48     enum E2 e2;
  49 };
  50 }
  51 void f()
  52 {
  53     S s;
  54     (void)s;
  55     (void)s.e2;
  56 }
  57 }
  58
  59 namespace UnusedEnum
  60 {
  61 namespace
  62 {
  63 struct S
  64 {
  65     enum E // expected-error {{unused class member [loplugin:unusedmember]}}
  66     {
  67         E1,
  68         E2
  69     };
  70 };
  71 }
  72 void f() { (void)S::E1; }
  73 }
  74
  75 namespace UnusedDataMember
  76 {
  77 namespace
  78 {
  79 struct NT
  80 {
  81     NT(int = 0) {}
  82     ~NT() {}
  83 };
  84 struct __attribute__((warn_unused)) T
  85 {
  86     T(int = 0) {}
  87     ~T() {}
  88 };
  89 struct S
  90 {
  91     int i1;
  92     int i2; // expected-error {{unused class member [loplugin:unusedmember]}}
  93     int const& i3; // expected-error {{unused class member [loplugin:unusedmember]}}
  94     NT nt;
  95     T t1;
  96     T t2; // expected-error {{unused class member [loplugin:unusedmember]}}
  97     T const& t3; // expected-error {{unused class member [loplugin:unusedmember]}}
  98     S()
  99         : i1(0)
 100         , i3(i1)
 101         , t1(0)
 102         , t3(t1)
 103     {
 104         (void)i1;
 105         (void)t1;
 106     }
 107 };
 108 }
 109 void f()
 110 {
 111     S s;
 112     (void)s;
 113 }
 114 }
 115
 116 namespace Alignof
 117 {
 118 namespace
 119 {
 120 struct S
 121 {
 122     int i;
 123 };
 124 }
 125 void f() { (void)alignof(S const(&)[][10]); }
 126 }
 127
 128 namespace Aligned
 129 {
 130 namespace
 131 {
 132 struct S1
 133 {
 134     int i;
 135 };
 136 struct S2
 137 {
 138     int i __attribute__((aligned(__alignof__(S1))));
 139 };
 140 }
 141 void f()
 142 {
 143     S2 s;
 144     s.i = 0;
 145 }
 146 }
 147
 148 namespace Bases
 149 {
 150 namespace
 151 {
 152 struct S1
 153 {
 154     int i1;
 155 };
 156 struct S2 : S1
 157 {
 158     int i2;
 159 };
 160 struct S3 : S2
 161 {
 162 };
 163 }
 164 void f() { (void)sizeof(S3); }
 165 }
 166
 167 namespace Unnamed
 168 {
 169 namespace
 170 {
 171 struct S
 172 {
 173     struct
 174     {
 175         struct
 176         {
 177             int i;
 178         } s2;
 179         struct // anonymous struct extension (widely supported)
 180         {
 181             int j;
 182         };
 183         int k;
 184     } s1;
 185 #if false //TODO: see corresponding TODO in compilerplugins/clang/unusedmember.cxx
 186     static constexpr struct
 187     {
 188         int l; // expected-error {{unused class member [loplugin:unusedmember]}}
 189     } s = {};
 190 #endif
 191     typedef struct
 192     {
 193         int m; // expected-error {{unused class member [loplugin:unusedmember]}}
 194     } t; // expected-error {{unused class member [loplugin:unusedmember]}}
 195 };
 196 }
 197 void f()
 198 {
 199     (void)sizeof(S);
 200 #if false //TODO: see corresponding TODO in compilerplugins/clang/unusedmember.cxx
 201     (void)S::s; // avoid "unused variable 's'" (non-loplugin) warning
 202 #endif
 203 }
 204 }
 205
 206 int main()
 207 {
 208     (void)&Enum::f;
 209     (void)&ElaboratedEnum::f;
 210     (void)&UnusedEnum::f;
 211     (void)&UnusedDataMember::f;
 212     (void)&Alignof::f;
 213     (void)&Aligned::f;
 214     (void)&Bases::f;
 215     (void)&Unnamed::f;
 216 }
 217
 218 /* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */