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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/.
*/
#ifndef LO_CLANG_SHARED_PLUGINS
#include <cassert>
#include "plugin.hxx"
namespace {
bool isStatic(ValueDecl const * decl, bool * memberEnumerator) {
assert(memberEnumerator != nullptr);
// clang::MemberExpr::getMemberDecl is documented to return either a
// FieldDecl or a CXXMethodDecl, but can apparently also return a VarDecl
// (as C++ static data members are modeled by VarDecl, not FieldDecl) or an
// EnumConstantDecl (struct { enum {E}; } s; s.E;), see
// <https://reviews.llvm.org/D23907> "Fix documentation of
// MemberExpr::getMemberDecl":
auto fd = dyn_cast<FieldDecl>(decl);
if (fd != nullptr) {
*memberEnumerator = false;
return false;
}
auto vd = dyn_cast<VarDecl>(decl);
if (vd != nullptr) {
*memberEnumerator = false;
assert(vd->isStaticDataMember());
return true;
}
auto md = dyn_cast<CXXMethodDecl>(decl);
if (md != nullptr) {
*memberEnumerator = false;
return md->isStatic();
}
assert(dyn_cast<EnumConstantDecl>(decl) != nullptr);
*memberEnumerator = true;
return true;
}
class StaticAccess:
public loplugin::FilteringPlugin<StaticAccess>
{
public:
explicit StaticAccess(loplugin::InstantiationData const & data):
FilteringPlugin(data) {}
void run() override
{ TraverseDecl(compiler.getASTContext().getTranslationUnitDecl()); }
bool VisitMemberExpr(MemberExpr const * expr);
};
bool StaticAccess::VisitMemberExpr(MemberExpr const * expr) {
if (ignoreLocation(expr)) {
return true;
}
auto decl = expr->getMemberDecl();
bool me;
if (!isStatic(decl, &me)) {
return true;
}
auto const loc = expr->getExprLoc();
if (compiler.getSourceManager().isMacroBodyExpansion(loc)) {
auto const name = Lexer::getImmediateMacroName(
loc, compiler.getSourceManager(), compiler.getLangOpts());
if (name == "BEGIN_COM_MAP" || name == "DEFAULT_REFLECTION_HANDLER") {
// .../VC/Tools/MSVC/14.14.26428/atlmfc/include\atlcom.h(2226,10): note: expanded from
// macro 'BEGIN_COM_MAP'
// return this->InternalQueryInterface(this, _GetEntries(), iid, ppvObject);
// ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
// .../VC/Tools/MSVC/14.14.26428/atlmfc/include\atlwin.h(2890,5): note: expanded from
// macro 'DEFAULT_REFLECTION_HANDLER'
// if(this->DefaultReflectionHandler(hWnd, uMsg, wParam, lParam, lResult))
// ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
return true;
}
}
report(
DiagnosticsEngine::Warning,
("accessing %select{static class member|member enumerator}0 through"
" class member access syntax, use a qualified name like '%1' instead"),
compat::getBeginLoc(expr))
<< me << decl->getQualifiedNameAsString() << expr->getSourceRange();
return true;
}
loplugin::Plugin::Registration<StaticAccess> staticaccess("staticaccess");
} // namespace
#endif // LO_CLANG_SHARED_PLUGINS
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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