compilerplugins/clang/weakobject.cxx

   1
   2 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   3 /*
   4  * This file is part of the LibreOffice project.
   5  *
   6  * Based on LLVM/Clang.
   7  *
   8  * This file is distributed under the University of Illinois Open Source
   9  * License. See LICENSE.TXT for details.
  10  *
  11  */
  12 #ifndef LO_CLANG_SHARED_PLUGINS
  13
  14 #include <cassert>
  15 #include <string>
  16 #include <iostream>
  17 #include <fstream>
  18 #include <set>
  19 #include <unordered_set>
  20 #include "plugin.hxx"
  21 #include "check.hxx"
  22
  23 /*
  24 Check for places where we end up with more than one copy of cppu::OweakObject in a class, which
  25 really should not happen - we should be using one of the AggImplInheritanceHelper classes then
  26 to inherit.
  27 */
  28
  29 namespace
  30 {
  31 class WeakObject : public loplugin::FilteringPlugin<WeakObject>
  32 {
  33 public:
  34     explicit WeakObject(loplugin::InstantiationData const& data)
  35         : FilteringPlugin(data)
  36     {
  37     }
  38
  39     virtual bool preRun() override
  40     {
  41         return true;
  42     }
  43
  44     virtual void run() override
  45     {
  46         if (preRun())
  47             TraverseDecl(compiler.getASTContext().getTranslationUnitDecl());
  48     }
  49
  50     bool VisitCXXRecordDecl( const CXXRecordDecl* decl);
  51
  52 };
  53
  54 bool WeakObject::VisitCXXRecordDecl(const CXXRecordDecl* decl)
  55 {
  56     if (ignoreLocation(decl))
  57         return true;
  58     if (!decl->hasDefinition())
  59         return true;
  60     if (decl->hasAnyDependentBases())
  61         return true;
  62     int cnt = 0;
  63     decl->forallBases(
  64         [&cnt] (const CXXRecordDecl *BaseDefinition) -> bool
  65         {
  66             if (loplugin::DeclCheck(BaseDefinition).Class("OWeakObject").Namespace("cppu").GlobalNamespace())
  67                 ++cnt;
  68             return true;
  69         });
  70     if (cnt < 2)
  71         return true;
  72
  73     report(DiagnosticsEngine::Warning, "more than one copy of cppu::OWeakObject inherited",
  74             decl->getBeginLoc())
  75         << decl->getSourceRange();
  76     return true;
  77 }
  78
  79 loplugin::Plugin::Registration<WeakObject> weakobject("weakobject", false);
  80
  81 } // namespace
  82
  83 #endif // LO_CLANG_SHARED_PLUGINS
  84
  85 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */