9720e8e5ef
Stumbled across such redundant visibility re-specifications when looking at the odd case of cppu_unsatisfied_iquery_msg declared CPPU_DLLPUBLIC in cppu/source/cppu/cppu_opt.cxx and used in inline code in include/com/sun/star/uno/Reference.hxx with only a declaration lacking CPPU_DLLPUBLIC visible, and wondering how that actually works on Windows. However, this plugin is probably not worth it being run all the time, so committing it to compilerplugins/clang/store/. Change-Id: Ibc3c4e7499213de1b419ce7eb85455cb832e1510
72 lines
2.3 KiB
C++
72 lines
2.3 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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#include "plugin.hxx"
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// Find function declarations that redundantly re-specify a visibility attribute
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// (via SAL_DLLPUBLIC_EXPORT etc.) that was already specified with a previous
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// declaration of that function. But MSVC wants consistency of __declspec
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// across friend declarations, so just ignore those for now.
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namespace {
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bool hasExplicitVisibilityAttr(Decl const * decl) {
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VisibilityAttr const * attr = decl->getAttr<VisibilityAttr>();
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return attr != nullptr && !attr->isInherited();
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}
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bool isFriendDecl(Decl const * decl) {
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return decl->getFriendObjectKind() != Decl::FOK_None;
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}
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class ReVisibility:
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public RecursiveASTVisitor<ReVisibility>, public loplugin::Plugin
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{
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public:
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explicit ReVisibility(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 VisitFunctionDecl(FunctionDecl const * decl);
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};
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bool ReVisibility::VisitFunctionDecl(FunctionDecl const * decl) {
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if (!ignoreLocation(decl) && hasExplicitVisibilityAttr(decl)
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&& !isFriendDecl(decl))
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{
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for (Decl const * p = decl;;) {
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p = p->getPreviousDecl();
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if (p == nullptr) {
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break;
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}
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if (hasExplicitVisibilityAttr(p) && !isFriendDecl(p)) {
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report(
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DiagnosticsEngine::Warning,
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"Redundant visibility re-declaration",
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decl->getAttr<VisibilityAttr>()->getLocation())
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<< decl->getAttr<VisibilityAttr>()->getRange();
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report(
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DiagnosticsEngine::Note,
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"Previous visibility declaration is here",
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p->getAttr<VisibilityAttr>()->getLocation())
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<< p->getAttr<VisibilityAttr>()->getRange();
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break;
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}
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}
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}
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return true;
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}
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loplugin::Plugin::Registration<ReVisibility> X("revisibility");
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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