compilerplugins/clang/test/classmemaccess.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 <cstring>
  11
  12 void f(struct Incomplete* p1, struct S* p2);
  13
  14 struct S
  15 {
  16     S();
  17 };
  18
  19 void f(struct Incomplete* p1, struct S* p2)
  20 {
  21     S s;
  22     // expected-error@+1 {{writing to an object of non-trivial type 'S'; use assignment instead [loplugin:classmemaccess]}}
  23     std::memset(&s, 0, sizeof s);
  24     // expected-error@+1 {{writing to an object of non-trivial type 'S'; use assignment instead [loplugin:classmemaccess]}}
  25     std::memset(static_cast<void*>(&s), 0, sizeof s);
  26     auto const disableWarning = static_cast<void*>(&s);
  27     std::memset(disableWarning, 0, sizeof s);
  28     S a[1][1];
  29     // expected-error@+1 {{writing to an object of non-trivial type 'S'; use assignment instead [loplugin:classmemaccess]}}
  30     std::memset(a, 0, sizeof a);
  31     std::memset(p1, 0, 10); // conservatively assume Incomplete may be trivial
  32     // expected-error@+1 {{writing to an object of non-trivial type 'S'; use assignment instead [loplugin:classmemaccess]}}
  33     std::memset(p2, 0, 10);
  34 }
  35
  36 /* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */