compilerplugins/clang/test/oncevar.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 <rtl/ustring.hxx>
  11
  12 /*int foo() { return 1; }*/
  13
  14 void call_value(int);
  15 void call_const_ref(int const &);
  16 void call_ref(int &);
  17 void call_value(OUString);
  18 void call_const_ref(OUString const &);
  19 void call_ref(OUString &);
  20
  21 template<typename T> void f() {
  22     int i = sizeof (T) + 1; // expected-error {{var used only once, should be inlined or declared const [loplugin:oncevar]}}
  23     call_value(i); // expected-note {{used here [loplugin:oncevar]}}
  24 }
  25 template void f<int>(); // needed for clang-cl
  26
  27 class Foo;
  28 void method1(const Foo**);
  29
  30 int main() {
  31 /* TODO
  32     int i;
  33     int x = 2;
  34     if ( (i = foo()) == 0 ) {
  35         x = 1;
  36     }
  37 */
  38
  39
  40     int i1 = 2; // expected-error {{var used only once, should be inlined or declared const [loplugin:oncevar]}}
  41     call_value(i1); // expected-note {{used here [loplugin:oncevar]}}
  42     int i2 = 2; // expected-error {{var used only once, should be inlined or declared const [loplugin:oncevar]}}
  43     call_const_ref(i2); // expected-note {{used here [loplugin:oncevar]}}
  44
  45     // don't expect warnings here
  46     int i3;
  47     call_ref(i3);
  48     int const i4 = 2;
  49     call_value(i4);
  50
  51     OUString s1("xxx"); // expected-error {{var used only once, should be inlined or declared const [loplugin:oncevar]}}
  52     call_value(s1); // expected-note {{used here [loplugin:oncevar]}}
  53     OUString s2("xxx"); // expected-error {{var used only once, should be inlined or declared const [loplugin:oncevar]}}
  54     call_const_ref(s2); // expected-note {{used here [loplugin:oncevar]}}
  55
  56     // don't expect warnings here
  57     OUString s3;
  58     call_ref(s3);
  59     OUString const s4("xxx");
  60     call_value(s4);
  61
  62     const Foo* pInternalArgs[] = { nullptr };
  63     method1(pInternalArgs);
  64 }
  65
  66 /* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */