compilerplugins/clang/test/crosscast.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 struct Base
  11 {
  12     virtual ~Base();
  13 };
  14
  15 struct Derived : Base
  16 {
  17 };
  18
  19 struct Virtual1 : virtual Base
  20 {
  21 };
  22
  23 struct Virtual2 : virtual Base
  24 {
  25 };
  26
  27 struct Virtual2a : Virtual2
  28 {
  29 };
  30
  31 struct Other
  32 {
  33     virtual ~Other();
  34 };
  35
  36 struct[[clang::annotate("loplugin:crosscast")]] Ok { virtual ~Ok(); };
  37
  38 Base* up(Derived* p) { return dynamic_cast<Base*>(p); }
  39
  40 Base& up(Derived& p) { return dynamic_cast<Base&>(p); }
  41
  42 Derived* down(Base* p) { return dynamic_cast<Derived*>(p); }
  43
  44 Derived& down(Base& p) { return dynamic_cast<Derived&>(p); }
  45
  46 Base* self(Base* p) { return dynamic_cast<Base*>(p); }
  47
  48 Base& self(Base& p) { return dynamic_cast<Base&>(p); }
  49
  50 Virtual1* crossVirtual(Virtual2a* p) { return dynamic_cast<Virtual1*>(p); }
  51
  52 Virtual1& crossVirtual(Virtual2a& p) { return dynamic_cast<Virtual1&>(p); }
  53
  54 Base* crossFromOther(Other* p)
  55 {
  56     // expected-error@+1 {{suspicious dynamic cross cast from 'Other *' to 'Base *' [loplugin:crosscast]}}
  57     return dynamic_cast<Base*>(p);
  58 }
  59
  60 Base& crossFromOther(Other& p)
  61 {
  62     // expected-error@+1 {{suspicious dynamic cross cast from 'Other' to 'Base &' [loplugin:crosscast]}}
  63     return dynamic_cast<Base&>(p);
  64 }
  65
  66 Other* crossToOther(Base* p)
  67 {
  68     // expected-error@+1 {{suspicious dynamic cross cast from 'Base *' to 'Other *' [loplugin:crosscast]}}
  69     return dynamic_cast<Other*>(p);
  70 }
  71
  72 Other& crossToOther(Base& p)
  73 {
  74     // expected-error@+1 {{suspicious dynamic cross cast from 'Base' to 'Other &' [loplugin:crosscast]}}
  75     return dynamic_cast<Other&>(p);
  76 }
  77
  78 Base* crossFromOk(Ok* p) { return dynamic_cast<Base*>(p); }
  79
  80 Base& crossFromOk(Ok& p) { return dynamic_cast<Base&>(p); }
  81
  82 Ok* crossToOk(Base* p) { return dynamic_cast<Ok*>(p); }
  83
  84 Ok& crossToOk(Base& p) { return dynamic_cast<Ok&>(p); }
  85
  86 void* mostDerived(Base* p) { return dynamic_cast<void*>(p); }
  87
  88 template <typename T> T generic1(Base* p) { return dynamic_cast<T>(p); }
  89
  90 template <typename T> T* generic2(Base* p) { return dynamic_cast<T*>(p); }
  91
  92 template <typename T> Derived* generic3(T p) { return dynamic_cast<Derived*>(p); }
  93
  94 template <typename T> Derived* generic4(T* p) { return dynamic_cast<Derived*>(p); }
  95
  96 /* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */