compilerplugins/clang/constexprliteral.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 <cassert>
  13 #include <stack>
  14
  15 #include "check.hxx"
  16 #include "plugin.hxx"
  17 #include "config_clang.h"
  18
  19 namespace
  20 {
  21 class ConstexprLiteral final : public loplugin::FilteringPlugin<ConstexprLiteral>
  22 {
  23 public:
  24     explicit ConstexprLiteral(loplugin::InstantiationData const& data)
  25         : FilteringPlugin(data)
  26     {
  27     }
  28
  29     bool VisitVarDecl(const VarDecl* varDecl)
  30     {
  31         if (ignoreLocation(varDecl))
  32             return true;
  33         if (varDecl->isConstexpr())
  34             return true;
  35         if (!loplugin::TypeCheck(varDecl->getType())
  36                  .Class("OUStringLiteral")
  37                  .Namespace("rtl")
  38                  .GlobalNamespace())
  39             return true;
  40         report(DiagnosticsEngine::Warning, "OUStringLiteral should be declared constexpr",
  41                varDecl->getBeginLoc())
  42             << varDecl->getSourceRange();
  43         return true;
  44     }
  45
  46     bool preRun() override
  47     {
  48         if (!compiler.getLangOpts().CPlusPlus)
  49             return false;
  50         return true;
  51     }
  52
  53 private:
  54     void run() override
  55     {
  56         if (preRun())
  57         {
  58             TraverseDecl(compiler.getASTContext().getTranslationUnitDecl());
  59         }
  60     }
  61 };
  62
  63 loplugin::Plugin::Registration<ConstexprLiteral> constexprliteral("constexprliteral");
  64 }
  65
  66 #endif
  67
  68 /* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */