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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/.
*/
// Find places where a std::unique_ptr is release()'ed and returned as a raw
// pointer. Some occurrences of that might better be rewritten to return the
// unique_ptr is returned directly. (But other occurrences might be fine the
// way they are, hence place this plugin into store/).
#include <memory>
#include "plugin.hxx"
namespace {
class ReturnUnique:
public loplugin::FilteringPlugin<ReturnUnique>
{
public:
explicit ReturnUnique(InstantiationData const & data): FilteringPlugin(data) {}
void run() override {
if (compiler.getLangOpts().CPlusPlus) {
TraverseDecl(compiler.getASTContext().getTranslationUnitDecl());
}
}
bool VisitReturnStmt(ReturnStmt const * stmt);
};
bool ReturnUnique::VisitReturnStmt(ReturnStmt const * stmt) {
if (ignoreLocation(stmt)) {
return true;
}
auto const e1 = stmt->getRetValue();
if (e1 == nullptr) {
return true;
}
auto const e2 = dyn_cast<CXXMemberCallExpr>(e1->IgnoreParenImpCasts());
if (e2 == nullptr) {
return true;
}
auto const d1 = e2->getMethodDecl();
if (d1 == nullptr) { // call via ptr to member
return true;
}
auto const d2 = d1->getParent();
assert(d2 != nullptr);
assert(d2->getParent() != nullptr);
auto const d3 = dyn_cast<NamespaceDecl>(d2->getParent());
if (d3 == nullptr
/* || dyn_cast<TranslationUnitDecl>(d3->getParent()) == nullptr */)
{
return true;
}
auto const id3 = d3->getIdentifier();
if (id3 == nullptr /* || id3->getName() != "std" */) {
return true;
}
auto const id2 = d2->getIdentifier();
if (id2 == nullptr || id2->getName() != "unique_ptr") {
return true;
}
auto const id1 = d1->getIdentifier();
if (id1 == nullptr || id1->getName() != "release") {
return true;
}
report(
DiagnosticsEngine::Warning, "return std::unique_ptr::release",
e2->getLocStart())
<< stmt->getSourceRange();
return true;
}
loplugin::Plugin::Registration<ReturnUnique> X("returnunique");
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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