compilerplugins/clang/unoany.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 #ifndef LO_CLANG_SHARED_PLUGINS
  11
  12 #include "check.hxx"
  13 #include "compat.hxx"
  14 #include "plugin.hxx"
  15
  16 namespace {
  17
  18 class UnoAny:
  19     public loplugin::FilteringPlugin<UnoAny>
  20 {
  21 public:
  22     explicit UnoAny(loplugin::InstantiationData const & data): FilteringPlugin(data) {}
  23
  24     bool preRun() override {
  25         return compiler.getLangOpts().CPlusPlus;
  26     }
  27
  28     void run() override {
  29         if (preRun()) {
  30             TraverseDecl(compiler.getASTContext().getTranslationUnitDecl());
  31         }
  32     }
  33
  34     bool VisitCXXOperatorCallExpr(CXXOperatorCallExpr const * expr);
  35 };
  36
  37 bool UnoAny::VisitCXXOperatorCallExpr(CXXOperatorCallExpr const * expr)
  38 {
  39     if (ignoreLocation(expr)) {
  40         return true;
  41     }
  42     StringRef aFileName = getFilenameOfLocation(
  43             compiler.getSourceManager().getSpellingLoc(compat::getBeginLoc(expr)));
  44     if (loplugin::isSamePathname(aFileName, SRCDIR "/include/com/sun/star/uno/Any.hxx")) {
  45         return true;
  46     }
  47     if (expr->getOperator() != OO_Equal) {
  48         return true;
  49     }
  50     if (!loplugin::TypeCheck(expr->getArg(0)->getType()).Class("Any").
  51          Namespace("uno").Namespace("star").Namespace("sun").Namespace("com").GlobalNamespace())
  52     {
  53         return true;
  54     }
  55     if (auto expr2 = dyn_cast<MaterializeTemporaryExpr>(expr->getArg(1))) {
  56         if (auto expr3 = dyn_cast<CXXBindTemporaryExpr>(compat::getSubExpr(expr2))) {
  57             if (auto expr4 = dyn_cast<CallExpr>(expr3->getSubExpr())) {
  58                 if (loplugin::DeclCheck(expr4->getDirectCallee()).Function("makeAny").
  59                     Namespace("uno").Namespace("star").Namespace("sun").Namespace("com").GlobalNamespace()) {
  60                     report(
  61                             DiagnosticsEngine::Warning,
  62                             ("unnecessary copy, rather use <<= operator directly with the 'makeAny'"
  63                              " argument"),
  64                             expr->getOperatorLoc())
  65                       << expr->getSourceRange();
  66                     return true;
  67                 }
  68             }
  69         }
  70         if (isa<CXXFunctionalCastExpr>(compat::getSubExpr(expr2))) {
  71             //expr->getArg(1)->dump();
  72             report(
  73                     DiagnosticsEngine::Warning,
  74                     ("unnecessary copy, rather use <<= operator directly with the 'Any' constructor"
  75                      " argument"),
  76                     expr->getOperatorLoc())
  77               << expr->getSourceRange();
  78             return true;
  79         }
  80     }
  81     //expr->getArg(1)->dump();
  82     return true;
  83 }
  84
  85 loplugin::Plugin::Registration<UnoAny> unoany("unoany");
  86
  87 } // namespace
  88
  89 #endif // LO_CLANG_SHARED_PLUGINS
  90
  91 /* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */