# Cppcheck report - LibreOffice: compilerplugins/clang/derefnullptr.cxx

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    /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
    /*
     * This file is part of the LibreOffice project.
     *
     * This Source Code Form is subject to the terms of the Mozilla Public
     * License, v. 2.0. If a copy of the MPL was not distributed with this
     * file, You can obtain one at http://mozilla.org/MPL/2.0/.
     */

    #include "plugin.hxx"

    namespace {

    class DerefNullPtr:
        public RecursiveASTVisitor<DerefNullPtr>, public loplugin::Plugin
    {
    public:
        explicit DerefNullPtr(InstantiationData const & data): Plugin(data) {}

        void run() override
        { TraverseDecl(compiler.getASTContext().getTranslationUnitDecl()); }

        bool VisitUnaryDeref(UnaryOperator const * op);
    };

    bool DerefNullPtr::VisitUnaryDeref(UnaryOperator const * op) {<--- The function 'VisitUnaryDeref' is never used.
        if (!ignoreLocation(op)
            && (op->getSubExpr()->IgnoreParenCasts()->isNullPointerConstant(
                    compiler.getASTContext(), Expr::NPC_ValueDependentIsNotNull/*TODO*/)
                != Expr::NPCK_NotNull))
        {
            report(
                DiagnosticsEngine::Warning, "null pointer dereference",
                op->getLocStart())
                << op->getSourceRange();
        }
        return true;
    }

    loplugin::Plugin::Registration<DerefNullPtr> X("derefnullptr");

    }

    /* vim:set shiftwidth=4 softtabstop=4 expandtab: */