compilerplugins/clang/test/external.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 #include <sal/config.h>
  11
  12 #include <vector>
  13
  14 #include "external.hxx"
  15
  16 int n0; // no warning, see external.hxx
  17
  18 // expected-error@+1 {{externally available entity 'n1' is not previously declared in an included file (if it is only used in this translation unit, make it static or put it in an unnamed namespace; otherwise, provide a declaration of it in an included file) [loplugin:external]}}
  19 int n1 = 0;
  20 // expected-note@+1 {{another declaration is here [loplugin:external]}}
  21 extern int n1;
  22
  23 int const n2 = 0; // no warning, internal linkage
  24
  25 constexpr int n3 = 0; // no warning, internal linkage
  26
  27 static int n4; // no warning, internal linkage
  28
  29 // expected-note@+1 {{another declaration is here [loplugin:external]}}
  30 extern int n5;
  31 // expected-error@+1 {{externally available entity 'n5' is not previously declared in an included file (if it is only used in this translation unit, make it static or put it in an unnamed namespace; otherwise, provide a declaration of it in an included file) [loplugin:external]}}
  32 int n5;
  33
  34 // expected-note@+1 {{another declaration is here [loplugin:external]}}
  35 extern "C" int n6;
  36 // expected-error@+1 {{externally available entity 'n6' is not previously declared in an included file (if it is only used in this translation unit, make it static or put it in an unnamed namespace; otherwise, provide a declaration of it in an included file) [loplugin:external]}}
  37 int n6;
  38
  39 extern "C" {
  40 // expected-error@+1 {{externally available entity 'n7' is not previously declared in an included file (if it is only used in this translation unit, make it static or put it in an unnamed namespace; otherwise, provide a declaration of it in an included file) [loplugin:external]}}
  41 int n7;
  42 }
  43
  44 namespace
  45 {
  46 int u1; // no warning, internal linkage
  47
  48 static int u2; // no warning, internal linkage
  49
  50 extern "C" int u3;
  51 int u3; // no warning, see the comment about DR1113 in compilerplugins/clang/external.cxx
  52
  53 extern "C" {
  54 int u4; // no warning, internal linkage
  55 }
  56 }
  57
  58 namespace N
  59 {
  60 int v1; // no warning, see external.hxx
  61
  62 // expected-error@+1 {{externally available entity 'v2' is not previously declared in an included file (if it is only used in this translation unit, make it static or put it in an unnamed namespace; otherwise, provide a declaration of it in an included file) [loplugin:external]}}
  63 int v2;
  64
  65 static int v3; // no warning, internal linkage
  66 }
  67
  68 struct S
  69 {
  70     static int f()
  71     {
  72         static int s = 0;
  73         return s;
  74     }
  75
  76     static int m;
  77 };
  78
  79 int S::m = 0; // no warning
  80
  81 int f(int a) // no warning about parameters
  82 {
  83     static int s = 0; // no warning about local static variables
  84     ++s;
  85     int b = a + s; // no warning about local variables
  86     return b;
  87 }
  88
  89 // expected-error@+1 {{externally available entity 'S1' is not previously declared in an included file (if it is only used in this translation unit, put it in an unnamed namespace; otherwise, provide a declaration of it in an included file) [loplugin:external]}}
  90 struct S1
  91 {
  92     friend void f1() {} // no warning for injected function (no place where to mark it `static`)
  93     template <typename> friend void ft1() {} // ...nor for injected function template
  94     // expected-error@+1 {{externally available entity 'f2' is not previously declared in an included file (if it is only used in this translation unit, make it static; otherwise, provide a declaration of it in an included file) [loplugin:external]}}
  95     friend void f2() {}
  96 };
  97
  98 // expected-error@+1 {{externally available entity 'S2' is not previously declared in an included file (if it is only used in this translation unit, put it in an unnamed namespace; otherwise, provide a declaration of it in an included file) [loplugin:external]}}
  99 struct S2
 100 {
 101     friend void f1();
 102     template <typename> friend void ft1();
 103     // expected-note@+1 {{another declaration is here [loplugin:external]}}
 104     friend void f2();
 105 };
 106
 107 static void g()
 108 {
 109     void f1();
 110     // expected-note@+1 {{another declaration is here [loplugin:external]}}
 111     void f2();
 112 }
 113
 114 // expected-note@+1 {{another declaration is here [loplugin:external]}}
 115 void f2();
 116
 117 namespace N
 118 {
 119 inline namespace I1
 120 {
 121 extern "C++" {
 122 // expected-note@+1 {{another declaration is here [loplugin:external]}}
 123 enum E : int;
 124
 125 // expected-error@+1 {{externally available entity 'E' is not previously declared in an included file (if it is only used in this translation unit, put it in an unnamed namespace; otherwise, provide a declaration of it in an included file) [loplugin:external]}}
 126 enum E : int
 127 {
 128 };
 129 }
 130 }
 131
 132 // expected-note-re@+1 {{a function associating 'N{{(::I1)?}}::E' is declared here [loplugin:external]}}
 133 static void g(std::vector<E>)
 134 {
 135     // expected-note@+1 {{another declaration is here [loplugin:external]}}
 136     void f(E const*);
 137 }
 138
 139 // expected-note-re@+1 {{a function associating 'N{{(::I1)?}}::E' is declared here [loplugin:external]}}
 140 void f(E const*);
 141
 142 extern "C++" {
 143 // expected-note-re@+1 {{a function associating 'N{{(::I1)?}}::E' is declared here [loplugin:external]}}
 144 void fc(E const*);
 145 }
 146
 147 // expected-error@+1 {{externally available entity 'S1' is not previously declared in an included file (if it is only used in this translation unit, put it in an unnamed namespace; otherwise, provide a declaration of it in an included file) [loplugin:external]}}
 148 struct S1
 149 {
 150     struct S2;
 151     // No note about associating function; injected friend function not found by ADL:
 152     friend void f2(E const*);
 153     // expected-note@+1 {{a function associating 'N::S1' is declared here [loplugin:external]}}
 154     friend void h(S1);
 155 };
 156
 157 // expected-error@+1 {{externally available entity 'S3' is not previously declared in an included file (if it is only used in this translation unit, put it in an unnamed namespace; otherwise, provide a declaration of it in an included file) [loplugin:external]}}
 158 struct S3
 159 {
 160     // expected-note@+1 {{another declaration is here [loplugin:external]}}
 161     friend void h(S1);
 162 };
 163
 164 inline namespace I2
 165 {
 166 // expected-note-re@+1 {{a function associating 'N{{(::I1)?}}::E' is declared here [loplugin:external]}}
 167 void f3(E);
 168
 169 inline namespace I3
 170 {
 171 // expected-note-re@+1 {{a function associating 'N{{(::I1)?}}::E' is declared here [loplugin:external]}}
 172 void f4(E);
 173 }
 174 }
 175 }
 176
 177 struct N::S1::S2
 178 {
 179     // expected-note@+1 {{another declaration is here [loplugin:external]}}
 180     friend void f(E const*);
 181 };
 182
 183 int main()
 184 {
 185     (void)n2;
 186     (void)n3;
 187     (void)n4;
 188     (void)u1;
 189     (void)u2;
 190     (void)N::v3;
 191     g();
 192     (void)&N::g;
 193 }
 194
 195 /* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */