| 1 | // Copyright (C) 2021 The Qt Company Ltd. |
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| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0 |
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| 3 | |
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| 4 | #ifndef QQMLJSSHADOWCHECK_P_H |
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| 5 | #define QQMLJSSHADOWCHECK_P_H |
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| 6 | |
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| 7 | // |
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| 8 | // W A R N I N G |
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| 9 | // ------------- |
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| 10 | // |
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| 11 | // This file is not part of the Qt API. It exists purely as an |
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| 12 | // implementation detail. This header file may change from version to |
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| 13 | // version without notice, or even be removed. |
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| 14 | // |
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| 15 | // We mean it. |
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| 16 | |
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| 17 | #include <private/qqmljscompilepass_p.h> |
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| 18 | |
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| 19 | QT_BEGIN_NAMESPACE |
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| 20 | |
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| 21 | class Q_QMLCOMPILER_EXPORT QQmlJSShadowCheck : public QQmlJSCompilePass |
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| 22 | { |
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| 23 | public: |
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| 24 | QQmlJSShadowCheck(const QV4::Compiler::JSUnitGenerator *jsUnitGenerator, |
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| 25 | const QQmlJSTypeResolver *typeResolver, QQmlJSLogger *logger, |
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| 26 | BasicBlocks basicBlocks, InstructionAnnotations annotations) |
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| 27 | : QQmlJSCompilePass(jsUnitGenerator, typeResolver, logger, basicBlocks, annotations) |
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| 28 | {} |
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| 29 | |
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| 30 | ~QQmlJSShadowCheck() = default; |
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| 31 | |
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| 32 | BlocksAndAnnotations run(const Function *function, QQmlJS::DiagnosticMessage *error); |
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| 33 | |
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| 34 | private: |
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| 35 | struct ResettableStore { |
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| 36 | QQmlJSRegisterContent accumulatorIn; |
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| 37 | int instructionOffset = -1; |
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| 38 | }; |
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| 39 | |
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| 40 | void handleStore(int base, const QString &memberName); |
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| 41 | |
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| 42 | void generate_LoadProperty(int nameIndex) override; |
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| 43 | void generate_GetLookup(int index) override; |
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| 44 | void generate_GetOptionalLookup(int index, int offset) override; |
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| 45 | void generate_StoreProperty(int nameIndex, int base) override; |
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| 46 | void generate_SetLookup(int index, int base) override; |
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| 47 | void generate_CallProperty(int nameIndex, int base, int argc, int argv) override; |
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| 48 | void generate_CallPropertyLookup(int nameIndex, int base, int argc, int argv) override; |
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| 49 | |
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| 50 | QV4::Moth::ByteCodeHandler::Verdict startInstruction(QV4::Moth::Instr::Type) override; |
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| 51 | void endInstruction(QV4::Moth::Instr::Type) override; |
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| 52 | |
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| 53 | enum Shadowability { NotShadowable, Shadowable }; |
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| 54 | Shadowability checkShadowing( |
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| 55 | const QQmlJSRegisterContent &baseType, const QString &propertyName, int baseRegister); |
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| 56 | |
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| 57 | void checkResettable(const QQmlJSRegisterContent &accumulatorIn, int instructionOffset); |
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| 58 | |
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| 59 | Shadowability checkBaseType(const QQmlJSRegisterContent &baseType); |
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| 60 | |
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| 61 | QList<ResettableStore> m_resettableStores; |
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| 62 | QList<QQmlJSRegisterContent> m_baseTypes; |
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| 63 | QSet<QQmlJSRegisterContent> m_adjustedTypes; |
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| 64 | |
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| 65 | State m_state; |
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| 66 | }; |
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| 67 | |
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| 68 | QT_END_NAMESPACE |
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| 69 | |
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| 70 | #endif // QQMLJSSHADOWCHECK_P_H |
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| 71 | |
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