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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
/*
* 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 <stack>
#include "check.hxx"
#include "plugin.hxx"
// In C++, find implicit conversions from char16_t (aka sal_Unicode) to char.
// Such places are probably meant to properly work on char16_t instead.
namespace {
class UnicodeToChar final:
public loplugin::FilteringPlugin<UnicodeToChar>
{
public:
explicit UnicodeToChar(loplugin::InstantiationData const & data):
FilteringPlugin(data) {}
bool PreTraverseCStyleCastExpr(CStyleCastExpr * expr) {
subExprs_.push(expr->getSubExpr());
return true;
}
bool PostTraverseCStyleCastExpr(CStyleCastExpr *, bool ) {
subExprs_.pop();
return true;
}
bool TraverseCStyleCastExpr(CStyleCastExpr * expr) {
PreTraverseCStyleCastExpr(expr);
bool ret = RecursiveASTVisitor::TraverseCStyleCastExpr(expr);
PostTraverseCStyleCastExpr(expr, ret);
return ret;
}
bool PreTraverseCXXStaticCastExpr(CXXStaticCastExpr * expr) {
subExprs_.push(expr->getSubExpr());
return true;
}
bool PostTraverseCXXStaticCastExpr(CXXStaticCastExpr *, bool) {
subExprs_.pop();
return true;
}
bool TraverseCXXStaticCastExpr(CXXStaticCastExpr * expr) {
PreTraverseCXXStaticCastExpr(expr);
bool ret = RecursiveASTVisitor::TraverseCXXStaticCastExpr(expr);
PostTraverseCXXStaticCastExpr(expr, ret);
return ret;
}
bool PreTraverseCXXFunctionalCastExpr(CXXFunctionalCastExpr * expr) {
subExprs_.push(expr->getSubExpr());
return true;
}
bool PostTraverseCXXFunctionalCastExpr(CXXFunctionalCastExpr *, bool) {
subExprs_.pop();
return true;
}
bool TraverseCXXFunctionalCastExpr(CXXFunctionalCastExpr * expr) {
PreTraverseCXXFunctionalCastExpr(expr);
bool ret = RecursiveASTVisitor::TraverseCXXFunctionalCastExpr(expr);
PostTraverseCXXFunctionalCastExpr(expr, ret);
return ret;
}
bool VisitImplicitCastExpr(ImplicitCastExpr const * expr) {
if ((!subExprs_.empty() && expr == subExprs_.top())
|| ignoreLocation(expr))
{
return true;
}
if (!(loplugin::TypeCheck(expr->getType()).Char()
&& expr->getSubExpr()->getType()->isSpecificBuiltinType(
clang::BuiltinType::Char16)))
{
return true;
}
APSInt res;
if (compat::EvaluateAsInt(expr->getSubExpr(), res, compiler.getASTContext())
&& res >= 0 && res <= 0x7F)
{
return true;
}
report(
DiagnosticsEngine::Warning,
"suspicious implicit cast from %0 to %1",
expr->getExprLoc())
<< expr->getSubExpr()->getType() << expr->getType()
<< expr->getSourceRange();
return true;
}
bool preRun() override {
return compiler.getLangOpts().CPlusPlus;
}
void run() override {
if (preRun()) {
TraverseDecl(compiler.getASTContext().getTranslationUnitDecl());
}
}
private:
std::stack<Expr const *> subExprs_;
};
static loplugin::Plugin::Registration<UnicodeToChar> unicodetochar("unicodetochar");
} // namespace
#endif // LO_CLANG_SHARED_PLUGINS
/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */
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