compilerplugins/clang/test/passparamsbyref.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 #pragma clang diagnostic ignored "-Wunknown-warning-option" // for Clang < 13
  13 #pragma clang diagnostic ignored "-Wunused-but-set-variable"
  14
  15 struct S {
  16     OUString mv1;
  17     OUString mv2;
  18
  19     // make sure we ignore cases where the passed in parameter is std::move'd
  20     S(OUString v1, OUString v2)
  21       : mv1(std::move(v1)), mv2((std::move(v2))) {}
  22
  23     // expected-error-re@+1 {{passing '{{(rtl::)?}}OUString' by value, rather pass by const lvalue reference [loplugin:passparamsbyref]}}
  24     S(OUString v1)
  25         : mv1(v1) {}
  26
  27     // expected-error-re@+1 {{passing '{{(rtl::)?}}OUString' by value, rather pass by const lvalue reference [loplugin:passparamsbyref]}}
  28     void foo(OUString v1) { (void) v1; }
  29
  30     // no warning expected
  31     void foo2(OUString v1) { mv1 = std::move(v1); }
  32
  33     void takeByNonConstRef(OUString&);
  34
  35     // no warning expected
  36     void foo3(OUString v)
  37     {
  38         takeByNonConstRef(v);
  39     }
  40 };
  41
  42 namespace test2
  43 {
  44     struct TestObject { OUString s[64]; void nonConstMethod(); };
  45
  46     // no warning expected
  47     void f1(TestObject to)
  48     {
  49         to.nonConstMethod();
  50     }
  51 }
  52
  53 void f()
  54 {
  55     S* s;
  56     OUString v1, v2;
  57     s = new S(v1, v2);
  58 }
  59
  60
  61 // check that we don't warn when the param is modified
  62 OUString trim_string(OUString aString)
  63 {
  64     aString += "xxx";
  65     return aString;
  66 }
  67
  68 /* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */