58 lines
1.9 KiB
C++
58 lines
1.9 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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#include "check.hxx"
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#include "plugin.hxx"
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namespace {
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class CharRightShift:
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public RecursiveASTVisitor<CharRightShift>, public loplugin::Plugin
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{
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public:
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explicit CharRightShift(InstantiationData const & data): Plugin(data) {}
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void run() override
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{ TraverseDecl(compiler.getASTContext().getTranslationUnitDecl()); }
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bool VisitBinShr(BinaryOperator const * expr) {
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if (ignoreLocation(expr)) {
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return true;
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}
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auto t = expr->getLHS()->IgnoreParenImpCasts()->getType();
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if (!loplugin::TypeCheck(t).Char()) {
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return true;
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}
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if (!expr->getRHS()->getType()->isBuiltinType()) {
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//TODO: in which case the expression should be an
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// CXXOperatorCallExpr instead of a BinaryOperator? but at least
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// recent Clang trunk reports
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//
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// '(' >> orExpression
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//
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// (connectivity/source/commontools/RowFunctionParser.cxx, the RHS
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// being of type boost::spirit::rule<ScannerT>) here
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return true;
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}
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report(
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DiagnosticsEngine::Warning,
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("right shift of %0 is implementation-defined when 'char' is signed"
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" and value is negative"),
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expr->getLHS()->getExprLoc())
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<< t << expr->getSourceRange();
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return true;
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}
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};
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loplugin::Plugin::Registration<CharRightShift> X("charrightshift");
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */
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