| 1 | // Copyright (C) 2021 The Qt Company Ltd. |
|---|---|
| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0 |
| 3 | |
| 4 | #include "qqmljsstoragegeneralizer_p.h" |
| 5 | |
| 6 | QT_BEGIN_NAMESPACE |
| 7 | |
| 8 | /*! |
| 9 | * \internal |
| 10 | * \class QQmlJSStorageGeneralizer |
| 11 | * |
| 12 | * The QQmlJSStorageGeneralizer is a compile pass that changes all type |
| 13 | * annotations and the function signature to use a generic storage type like |
| 14 | * QVariant or QObject*. This is necessary if we cannot rely on the original |
| 15 | * type to be immediately accessible, for example because we cannot include its |
| 16 | * header. |
| 17 | * |
| 18 | * QQmlJSStorageGeneralizer does not have to use the byte code at all but |
| 19 | * operates only on the annotations and the function description. |
| 20 | */ |
| 21 | |
| 22 | QQmlJSCompilePass::InstructionAnnotations QQmlJSStorageGeneralizer::run( |
| 23 | InstructionAnnotations annotations, Function *function, |
| 24 | QQmlJS::DiagnosticMessage *error) |
| 25 | { |
| 26 | m_error = error; |
| 27 | |
| 28 | if (QQmlJSScope::ConstPtr &returnType = function->returnType) { |
| 29 | if (QQmlJSScope::ConstPtr stored = m_typeResolver->genericType( |
| 30 | type: returnType, allowComponent: QQmlJSTypeResolver::ComponentIsGeneric::Yes)) { |
| 31 | returnType = stored; |
| 32 | } else { |
| 33 | setError(QStringLiteral("Cannot store the return type %1.") |
| 34 | .arg(a: returnType->internalName(), fieldWidth: 0)); |
| 35 | return InstructionAnnotations(); |
| 36 | } |
| 37 | } |
| 38 | |
| 39 | const auto transformRegister = [&](QQmlJSRegisterContent &content) { |
| 40 | if (const QQmlJSScope::ConstPtr &specific = content.storedType()) |
| 41 | m_typeResolver->generalizeType(type: specific); |
| 42 | }; |
| 43 | |
| 44 | const auto transformRegisters = [&](VirtualRegisters ®isters) { |
| 45 | for (auto j = registers.begin(), jEnd = registers.end(); j != jEnd; ++j) { |
| 46 | QQmlJSRegisterContent &content = j.value().content; |
| 47 | transformRegister(content); |
| 48 | } |
| 49 | }; |
| 50 | |
| 51 | for (QQmlJSRegisterContent &argument : function->argumentTypes) { |
| 52 | Q_ASSERT(argument.isValid()); |
| 53 | transformRegister(argument); |
| 54 | } |
| 55 | |
| 56 | for (auto i = annotations.begin(), iEnd = annotations.end(); i != iEnd; ++i) { |
| 57 | transformRegister(i->second.changedRegister); |
| 58 | transformRegisters(i->second.typeConversions); |
| 59 | } |
| 60 | |
| 61 | return annotations; |
| 62 | } |
| 63 | |
| 64 | QT_END_NAMESPACE |
| 65 |