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// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#ifndef QQMLJSSHADOWCHECK_P_H
#define QQMLJSSHADOWCHECK_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
#include <private/qqmljscompilepass_p.h>
QT_BEGIN_NAMESPACE
class Q_QMLCOMPILER_EXPORT QQmlJSShadowCheck : public QQmlJSCompilePass
{
public:
QQmlJSShadowCheck(const QV4::Compiler::JSUnitGenerator *jsUnitGenerator,
const QQmlJSTypeResolver *typeResolver, QQmlJSLogger *logger,
const BasicBlocks &basicBlocks, const InstructionAnnotations &annotations)
: QQmlJSCompilePass(jsUnitGenerator, typeResolver, logger, basicBlocks, annotations)
{}
~QQmlJSShadowCheck() = default;
BlocksAndAnnotations run(const Function *function);
private:
struct ResettableStore {
QQmlJSRegisterContent accumulatorIn;
int instructionOffset = -1;
};
void handleStore(int base, const QString &memberName);
void generate_LoadProperty(int nameIndex) override;
void generate_GetLookup(int index) override;
void generate_GetOptionalLookup(int index, int offset) override;
void generate_StoreProperty(int nameIndex, int base) override;
void generate_SetLookup(int index, int base) override;
void generate_CallProperty(int nameIndex, int base, int argc, int argv) override;
void generate_CallPropertyLookup(int nameIndex, int base, int argc, int argv) override;
QV4::Moth::ByteCodeHandler::Verdict startInstruction(QV4::Moth::Instr::Type) override;
void endInstruction(QV4::Moth::Instr::Type) override;
enum Shadowability { NotShadowable, Shadowable };
Shadowability checkShadowing(
QQmlJSRegisterContent baseType, const QString &propertyName, int baseRegister);
void checkResettable(QQmlJSRegisterContent accumulatorIn, int instructionOffset);
Shadowability checkBaseType(QQmlJSRegisterContent baseType);
QList<ResettableStore> m_resettableStores;
QList<QQmlJSRegisterContent> m_baseTypes;
QSet<QQmlJSRegisterContent> m_adjustedTypes;
State m_state;
};
QT_END_NAMESPACE
#endif // QQMLJSSHADOWCHECK_P_H
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