8d4fbc532e
Change-Id: I7451a95377101004c7c53c918f3234415e06f555 Reviewed-on: https://gerrit.libreoffice.org/75670 Tested-by: Jenkins Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
92 lines
2.6 KiB
C++
92 lines
2.6 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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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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#ifndef LO_CLANG_SHARED_PLUGINS
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#include <cassert>
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#include <string>
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#include <iostream>
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#include <fstream>
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#include <set>
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#include <clang/AST/CXXInheritance.h>
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#include "compat.hxx"
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#include "plugin.hxx"
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/**
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look for unnecessary blocks that just catch and rethrow:
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try {
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stuff
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} catch (exception const &) {
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throw;
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}
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*/
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namespace {
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class UnnecessaryCatchThrow:
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public loplugin::FilteringPlugin<UnnecessaryCatchThrow>
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{
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public:
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explicit UnnecessaryCatchThrow(loplugin::InstantiationData const & data): FilteringPlugin(data) {}
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virtual void run() override
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{
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TraverseDecl(compiler.getASTContext().getTranslationUnitDecl());
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}
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bool VisitCXXTryStmt(CXXTryStmt const *);
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};
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bool UnnecessaryCatchThrow::VisitCXXTryStmt(CXXTryStmt const * tryStmt)
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{
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if (ignoreLocation(tryStmt))
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return true;
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if (tryStmt->getNumHandlers() != 1)
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return true;
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auto catchStmt = tryStmt->getHandler(0);
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auto compoundStmt = dyn_cast<CompoundStmt>(catchStmt->getHandlerBlock());
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if (!compoundStmt || compoundStmt->size() != 1)
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return true;
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auto throwExpr = dyn_cast<CXXThrowExpr>(compoundStmt->body_front());
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if (!throwExpr)
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return true;
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auto subExpr = throwExpr->getSubExpr();
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if (subExpr)
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{
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if (auto cxxConstructExpr = dyn_cast<CXXConstructExpr>(subExpr)) {
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if (!cxxConstructExpr->getConstructor()->isCopyConstructor())
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return true;
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if (!cxxConstructExpr->getConstructor()->getParent()->hasAttr<FinalAttr>())
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return true;
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if (cxxConstructExpr->getNumArgs() != 1)
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return true;
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subExpr = cxxConstructExpr->getArg(0);
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}
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auto declRefExpr = dyn_cast<DeclRefExpr>(subExpr->IgnoreImpCasts());
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if (!declRefExpr)
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return true;
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if (declRefExpr->getDecl() != catchStmt->getExceptionDecl())
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return true;
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}
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report( DiagnosticsEngine::Warning, "unnecessary catch and throw",
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compat::getBeginLoc(catchStmt))
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<< catchStmt->getSourceRange();
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return true;
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}
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loplugin::Plugin::Registration< UnnecessaryCatchThrow > unnecessarycatchthrow("unnecessarycatchthrow");
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} // namespace
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#endif // LO_CLANG_SHARED_PLUGINS
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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