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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 <set>
#include "check.hxx"
#include "compat.hxx"
#include "plugin.hxx"
/** Look for static OUString and OUString[], they can be more efficiently declared as:
static const OUStringLiteral our_aLBEntryMap[] = {" ", ", "};
static const OUStringLiteral sName("name");
which is more efficient at startup time.
*/
namespace {
class StringStatic
: public loplugin::FilteringPlugin<StringStatic>
{
public:
explicit StringStatic(loplugin::InstantiationData const& rData):
FilteringPlugin(rData) {}
void run() override;
bool preRun() override;
void postRun() override;
bool VisitVarDecl(VarDecl const*);
bool VisitReturnStmt(ReturnStmt const*);
private:
std::set<VarDecl const *> potentialVars;
std::set<VarDecl const *> excludeVars;
};
void StringStatic::run()
{
if( preRun())
if( TraverseDecl(compiler.getASTContext().getTranslationUnitDecl()))
postRun();
}
bool StringStatic::preRun()
{
StringRef fn(handler.getMainFileName());
// passing around pointers to global OUString
if (loplugin::hasPathnamePrefix(fn, SRCDIR "/filter/source/svg/"))
return false;
// has a mix of literals and refs to external OUStrings
if (loplugin::isSamePathname(fn, SRCDIR "/ucb/source/ucp/webdav-neon/ContentProperties.cxx"))
return false;
return true;
}
void StringStatic::postRun()
{
for (auto const & pVarDecl : excludeVars) {
potentialVars.erase(pVarDecl);
}
for (auto const & varDecl : potentialVars) {
report(DiagnosticsEngine::Warning,
"rather declare this using OUStringLiteral or char[]",
varDecl->getLocation())
<< varDecl->getSourceRange();
}
}
bool StringStatic::VisitVarDecl(VarDecl const* varDecl)
{
if (ignoreLocation(varDecl)) {
return true;
}
QualType qt = varDecl->getType();
if (!varDecl->hasGlobalStorage()
|| !varDecl->isThisDeclarationADefinition()
|| !qt.isConstQualified()) {
return true;
}
if (qt->isArrayType()) {
qt = qt->getAsArrayTypeUnsafe()->getElementType();
}
if (!loplugin::TypeCheck(qt).Class("OUString").Namespace("rtl").GlobalNamespace()) {
return true;
}
if (varDecl->hasInit()) {
Expr const * expr = varDecl->getInit();
while (true) {
if (ExprWithCleanups const * exprWithCleanups = dyn_cast<ExprWithCleanups>(expr)) {
expr = exprWithCleanups->getSubExpr();
}
else if (CastExpr const * castExpr = dyn_cast<CastExpr>(expr)) {
expr = castExpr->getSubExpr();
}
else if (MaterializeTemporaryExpr const * materializeExpr = dyn_cast<MaterializeTemporaryExpr>(expr)) {
expr = compat::getSubExpr(materializeExpr);
}
else if (CXXBindTemporaryExpr const * bindExpr = dyn_cast<CXXBindTemporaryExpr>(expr)) {
expr = bindExpr->getSubExpr();
}
else if (CXXConstructExpr const * constructExpr = dyn_cast<CXXConstructExpr>(expr)) {
if (constructExpr->getNumArgs() != 1) {
return true;
}
expr = constructExpr->getArg(0);
} else if (isa<CallExpr>(expr)) {
return true;
} else {
break;
}
}
}
potentialVars.insert(varDecl);
return true;
}
bool StringStatic::VisitReturnStmt(ReturnStmt const * returnStmt)
{
if (ignoreLocation(returnStmt)) {
return true;
}
if (!returnStmt->getRetValue()) {
return true;
}
DeclRefExpr const * declRef = dyn_cast<DeclRefExpr>(returnStmt->getRetValue());
if (!declRef) {
return true;
}
VarDecl const * varDecl = dyn_cast<VarDecl>(declRef->getDecl());
if (varDecl) {
excludeVars.insert(varDecl);
}
return true;
}
loplugin::Plugin::Registration<StringStatic> stringstatic("stringstatic");
} // namespace
#endif // LO_CLANG_SHARED_PLUGINS
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|
