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/****************************************************************************
**
** Copyright (C) 2021 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the tools applications of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL-EXCEPT$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qqmljsstoragegeneralizer_p.h"
QT_BEGIN_NAMESPACE
/*!
* \internal
* \class QQmlJSStorageGeneralizer
*
* The QQmlJSStorageGeneralizer is a compile pass that changes all type
* annotations and the function signature to use a generic storage type like
* QVariant or QObject*. This is necessary if we cannot rely on the original
* type to be immediately accessible, for example because we cannot include its
* header.
*
* QQmlJSStorageGeneralizer does not have to use the byte code at all but
* operates only on the annotations and the function description.
*/
QQmlJSCompilePass::InstructionAnnotations QQmlJSStorageGeneralizer::run(
InstructionAnnotations annotations, Function *function,
QQmlJS::DiagnosticMessage *error)
{
m_error = error;
if (QQmlJSScope::ConstPtr &returnType = function->returnType) {
if (QQmlJSScope::ConstPtr stored = m_typeResolver->genericType(
returnType, QQmlJSTypeResolver::ComponentIsGeneric::Yes)) {
returnType = stored;
} else {
setError(QStringLiteral("Cannot store the return type %1.")
.arg(returnType->internalName(), 0));
return InstructionAnnotations();
}
}
for (QQmlJSScope::ConstPtr &argument : function->argumentTypes) {
Q_ASSERT(argument);
if (QQmlJSScope::ConstPtr stored = m_typeResolver->genericType(
argument, QQmlJSTypeResolver::ComponentIsGeneric::Yes)) {
argument = std::move(stored);
} else {
setError(QStringLiteral("Cannot store the argument type %1.")
.arg(argument->internalName(), 0));
return InstructionAnnotations();
}
}
const auto transformRegister = [&](QQmlJSRegisterContent &content, int offset) {
if (QQmlJSScope::ConstPtr specific = content.storedType()) {
if (QQmlJSScope::ConstPtr generic = m_typeResolver->genericType(specific)) {
content = content.storedIn(generic);
} else {
setError(QStringLiteral("Cannot store the register type %1.")
.arg(specific->internalName()), offset);
return false;
}
}
return true;
};
const auto transformRegisters
= [&](QFlatMap<int, QQmlJSRegisterContent> ®isters, int offset) {
for (auto j = registers.begin(), jEnd = registers.end(); j != jEnd; ++j) {
if (!transformRegister(j.value(), offset))
return false;
}
return true;
};
for (auto i = annotations.begin(), iEnd = annotations.end(); i != iEnd; ++i) {
if (!transformRegister(i->second.changedRegister, i.key()))
return InstructionAnnotations();
if (!transformRegisters(i->second.typeConversions, i.key()))
return InstructionAnnotations();
}
return annotations;
}
QT_END_NAMESPACE
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