/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtQml module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
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** accordance with the commercial license agreement provided with the
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** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
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** rights.  These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
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****************************************************************************/

#include "qqmlcompiler_p.h"

#include "qqmlpropertyvaluesource.h"
#include "qqmlcomponent.h"
#include <private/qmetaobjectbuilder_p.h>
#include "qqmlstringconverters_p.h"
#include "qqmlengine_p.h"
#include "qqmlengine.h"
#include "qqmlcontext.h"
#include "qqmlmetatype_p.h"
#include "qqmlcustomparser_p_p.h"
#include "qqmlcontext_p.h"
#include "qqmlcomponent_p.h"
#include <private/qqmljsast_p.h>
#include "qqmlvmemetaobject_p.h"
#include "qqmlexpression_p.h"
#include "qqmlproperty_p.h"
#include "qqmlrewrite_p.h"
#include "qqmlscriptstring.h"
#include "qqmlglobal_p.h"
#include "qqmlbinding_p.h"
#include <private/qv4compiler_p.h>

#include <QDebug>
#include <QPointF>
#include <QSizeF>
#include <QRectF>
#include <QAtomicInt>
#include <QtCore/qdebug.h>
#include <QtCore/qdatetime.h>
#include <QtCore/qvarlengtharray.h>

Q_DECLARE_METATYPE(QList<int>)
Q_DECLARE_METATYPE(QList<qreal>)
Q_DECLARE_METATYPE(QList<bool>)
Q_DECLARE_METATYPE(QList<QString>)
Q_DECLARE_METATYPE(QList<QUrl>)

QT_BEGIN_NAMESPACE

DEFINE_BOOL_CONFIG_OPTION(compilerDump, QML_COMPILER_DUMP);
DEFINE_BOOL_CONFIG_OPTION(compilerStatDump, QML_COMPILER_STATS);

using namespace QQmlJS;
using namespace QQmlScript;
using namespace QQmlCompilerTypes;

static QString id_string(QLatin1String("id"));
static QString on_string(QLatin1String("on"));
static QString Changed_string(QLatin1String("Changed"));
static QString Component_string(QLatin1String("Component"));
static QString Component_module_string(QLatin1String("QML"));
static QString qsTr_string(QLatin1String("qsTr"));
static QString qsTrId_string(QLatin1String("qsTrId"));

/*!
    Instantiate a new QQmlCompiler.
*/
QQmlCompiler::QQmlCompiler(QQmlPool *pool)
: compileState(0), pool(pool), output(0), engine(0), enginePrivate(0), unitRoot(0), unit(0), cachedComponentTypeRef(-1),
  cachedTranslationContextIndex(-1), componentStats(0)
{
    if (compilerStatDump()) 
        componentStats = pool->New<ComponentStats>();
}

/*!
    Returns true if the last call to compile() caused errors.

    \sa errors()
*/
bool QQmlCompiler::isError() const
{
    return !exceptions.isEmpty();
}

/*!
    Return the list of errors from the last call to compile(), or an empty list
    if there were no errors.
*/
QList<QQmlError> QQmlCompiler::errors() const
{
    return exceptions;
}

/*!
    Returns true if \a name refers to an attached property, false otherwise.

    Attached property names are those that start with a capital letter.
*/
bool QQmlCompiler::isAttachedPropertyName(const QString &name)
{
    return isAttachedPropertyName(QHashedStringRef(&name));
}

bool QQmlCompiler::isAttachedPropertyName(const QHashedStringRef &name)
{
    return !name.isEmpty() && name.at(0).isUpper();
}

/*!
    Returns true if \a name refers to a signal property, false otherwise.

    Signal property names are those that start with "on", followed by a first
    character which is either a capital letter or one or more underscores followed
    by a capital letter, which is then followed by other allowed characters.

    Note that although ECMA-262r3 supports dollarsigns and escaped unicode
    character codes in property names, for simplicity and performance reasons
    QML only supports letters, numbers and underscores.
*/
bool QQmlCompiler::isSignalPropertyName(const QString &name)
{
    return isSignalPropertyName(QStringRef(&name));
}

bool QQmlCompiler::isSignalPropertyName(const QHashedStringRef &name)
{
    if (name.length() < 3) return false;
    if (!name.startsWith(on_string)) return false;
    int ns = name.length();
    for (int i = 2; i < ns; ++i) {
        const QChar curr = name.at(i);
        if (curr.unicode() == '_') continue;
        if (curr.isUpper()) return true;
        return false;
    }
    return false; // consists solely of underscores - invalid.
}

/*!
    \macro COMPILE_EXCEPTION
    \internal
    Inserts an error into the QQmlCompiler error list, and returns false
    (failure).

    \a token is used to source the error line and column, and \a desc is the
    error itself.  \a desc can be an expression that can be piped into QDebug.

    For example:

    \code
    COMPILE_EXCEPTION(property, tr("Error for property \"%1\"").arg(property->name));
    \endcode
*/
#define COMPILE_EXCEPTION_LOCATION(line, column, desc) \
    {  \
        QQmlError error; \
        error.setUrl(output->url); \
        error.setLine(line); \
        error.setColumn(column); \
        error.setDescription(desc.trimmed()); \
        exceptions << error; \
        return false; \
    }

#define COMPILE_EXCEPTION(token, desc) \
    COMPILE_EXCEPTION_LOCATION((token)->location.start.line, (token)->location.start.column, desc)

/*!
    \macro COMPILE_CHECK
    \internal
    Returns false if \a is false, otherwise does nothing.
*/
#define COMPILE_CHECK(a) \
    { \
        if (!a) return false; \
    }

/*!
    Returns true if literal \a v can be assigned to property \a prop, otherwise
    false.

    This test corresponds to action taken by genLiteralAssignment().  Any change
    made here, must have a corresponding action in genLiteralAssigment().
*/
bool QQmlCompiler::testLiteralAssignment(QQmlScript::Property *prop, QQmlScript::Value *v)
{
    const QQmlScript::Variant &value = v->value;

    if (!prop->core.isWritable() && !prop->isReadOnlyDeclaration)
        COMPILE_EXCEPTION(v, tr("Invalid property assignment: \"%1\" is a read-only property").arg(prop->name().toString()));

    if (prop->core.isEnum()) {
        QMetaProperty p = prop->parent->metatype->firstCppMetaObject()->property(prop->index);
        int enumValue;
        bool ok;
        if (p.isFlagType()) {
            enumValue = p.enumerator().keysToValue(value.asString().toUtf8().constData(), &ok);
        } else
            enumValue = p.enumerator().keyToValue(value.asString().toUtf8().constData(), &ok);

        if (!ok)
            COMPILE_EXCEPTION(v, tr("Invalid property assignment: unknown enumeration"));

        v->value = QQmlScript::Variant((double)enumValue);
        return true;
    }

    int type = prop->type;

    switch(type) {
        case QMetaType::QVariant:
            break;
        case QVariant::String:
            if (!v->value.isString()) COMPILE_EXCEPTION(v, tr("Invalid property assignment: string expected"));
            break;
        case QVariant::StringList: // we expect a string literal.  A string list is not a literal assignment.
            if (!v->value.isString()) COMPILE_EXCEPTION(v, tr("Invalid property assignment: string or string list expected"));
            break;
        case QVariant::ByteArray:
            if (!v->value.isString()) COMPILE_EXCEPTION(v, tr("Invalid property assignment: byte array expected"));
            break;
        case QVariant::Url:
            if (!v->value.isString()) COMPILE_EXCEPTION(v, tr("Invalid property assignment: url expected"));
            break;
        case QVariant::RegExp:
            COMPILE_EXCEPTION(v, tr("Invalid property assignment: regular expression expected; use /pattern/ syntax"));
            break;
        case QVariant::UInt:
            {
            bool ok = v->value.isNumber();
            if (ok) {
                double n = v->value.asNumber();
                if (double(uint(n)) != n)
                    ok = false;
            }
            if (!ok) COMPILE_EXCEPTION(v, tr("Invalid property assignment: unsigned int expected"));
            }
            break;
        case QVariant::Int:
            {
            bool ok = v->value.isNumber();
            if (ok) {
                double n = v->value.asNumber();
                if (double(int(n)) != n)
                    ok = false;
            }
            if (!ok) COMPILE_EXCEPTION(v, tr("Invalid property assignment: int expected"));
            }
            break;
        case QMetaType::Float:
            if (!v->value.isNumber()) COMPILE_EXCEPTION(v, tr("Invalid property assignment: number expected"));
            break;
        case QVariant::Double:
            if (!v->value.isNumber()) COMPILE_EXCEPTION(v, tr("Invalid property assignment: number expected"));
            break;
        case QVariant::Color:
            {
            bool ok;
            QQmlStringConverters::colorFromString(value.asString(), &ok);
            if (!ok) COMPILE_EXCEPTION(v, tr("Invalid property assignment: color expected"));
            }
            break;
#ifndef QT_NO_DATESTRING
        case QVariant::Date:
            {
            bool ok;
            QQmlStringConverters::dateFromString(value.asString(), &ok);
            if (!ok) COMPILE_EXCEPTION(v, tr("Invalid property assignment: date expected"));
            }
            break;
        case QVariant::Time:
            {
            bool ok;
            QQmlStringConverters::timeFromString(value.asString(), &ok);
            if (!ok) COMPILE_EXCEPTION(v, tr("Invalid property assignment: time expected"));
            }
            break;
        case QVariant::DateTime:
            {
            bool ok;
            QQmlStringConverters::dateTimeFromString(value.asString(), &ok);
            if (!ok) COMPILE_EXCEPTION(v, tr("Invalid property assignment: datetime expected"));
            }
            break;
#endif // QT_NO_DATESTRING
        case QVariant::Point:
        case QVariant::PointF:
            {
            bool ok;
            QQmlStringConverters::pointFFromString(value.asString(), &ok);
            if (!ok) COMPILE_EXCEPTION(v, tr("Invalid property assignment: point expected"));
            }
            break;
        case QVariant::Size:
        case QVariant::SizeF:
            {
            bool ok;
            QQmlStringConverters::sizeFFromString(value.asString(), &ok);
            if (!ok) COMPILE_EXCEPTION(v, tr("Invalid property assignment: size expected"));
            }
            break;
        case QVariant::Rect:
        case QVariant::RectF:
            {
            bool ok;
            QQmlStringConverters::rectFFromString(value.asString(), &ok);
            if (!ok) COMPILE_EXCEPTION(v, tr("Invalid property assignment: rect expected"));
            }
            break;
        case QVariant::Bool:
            {
            if (!v->value.isBoolean()) COMPILE_EXCEPTION(v, tr("Invalid property assignment: boolean expected"));
            }
            break;
        case QVariant::Vector3D:
            {
            QQmlInstruction::instr_storeVector3D::QVector3D v3;
            if (!QQmlStringConverters::createFromString(QMetaType::QVector3D, value.asString(), &v3, sizeof(v3)))
                COMPILE_EXCEPTION(v, tr("Invalid property assignment: 3D vector expected"));
            }
            break;
        case QVariant::Vector4D:
            {
            QQmlInstruction::instr_storeVector4D::QVector4D v4;
            if (!QQmlStringConverters::createFromString(QMetaType::QVector4D, value.asString(), &v4, sizeof(v4)))
                COMPILE_EXCEPTION(v, tr("Invalid property assignment: 4D vector expected"));
            }
            break;
        default:
            {
            // check if assigning a literal value to a list property.
            // in each case, check the singular, since an Array of the specified type
            // will not go via this literal assignment codepath.
            if (type == qMetaTypeId<QList<qreal> >()) {
                if (!v->value.isNumber()) {
                    COMPILE_EXCEPTION(v, tr("Invalid property assignment: real or array of reals expected"));
                }
                break;
            } else if (type == qMetaTypeId<QList<int> >()) {
                bool ok = v->value.isNumber();
                if (ok) {
                    double n = v->value.asNumber();
                    if (double(int(n)) != n)
                        ok = false;
                }
                if (!ok) COMPILE_EXCEPTION(v, tr("Invalid property assignment: int or array of ints expected"));
                break;
            } else if (type == qMetaTypeId<QList<bool> >()) {
                if (!v->value.isBoolean()) {
                    COMPILE_EXCEPTION(v, tr("Invalid property assignment: bool or array of bools expected"));
                }
                break;
            } else if (type == qMetaTypeId<QList<QString> >()) { // we expect a string literal.  A string list is not a literal assignment.
                if (!v->value.isString()) {
                    COMPILE_EXCEPTION(v, tr("Invalid property assignment: string or array of strings expected"));
                }
                break;
            } else if (type == qMetaTypeId<QList<QUrl> >()) {
                if (!v->value.isString()) {
                    COMPILE_EXCEPTION(v, tr("Invalid property assignment: url or array of urls expected"));
                }
                break;
            } else if (type == qMetaTypeId<QJSValue>()) {
                break;
            }

            // otherwise, check for existence of string converter to custom type
            QQmlMetaType::StringConverter converter = QQmlMetaType::customStringConverter(type);
            if (!converter)
                COMPILE_EXCEPTION(v, tr("Invalid property assignment: unsupported type \"%1\"").arg(QString::fromLatin1(QMetaType::typeName(type))));
            }
            break;
    }
    return true;
}

/*!
    Generate a store instruction for assigning literal \a v to property \a prop.

    Any literal assignment that is approved in testLiteralAssignment() must have
    a corresponding action in this method.
*/
void QQmlCompiler::genLiteralAssignment(QQmlScript::Property *prop,
                                                QQmlScript::Value *v)
{
    if (prop->core.isEnum()) {
        Q_ASSERT(v->value.isNumber());
        // Preresolved value
        int value = (int)v->value.asNumber();

        Instruction::StoreInteger instr;
        instr.propertyIndex = prop->index;
        instr.value = value;
        output->addInstruction(instr);
        return;
    }

    int type = prop->type;
    switch(type) {
        case QMetaType::QVariant:
            {
            if (v->value.isNumber()) {
                double n = v->value.asNumber();
                if (double(int(n)) == n) {
                    if (prop->core.isVarProperty()) {
                        Instruction::StoreVarInteger instr;
                        instr.propertyIndex = prop->index;
                        instr.value = int(n);
                        output->addInstruction(instr);
                    } else {
                        Instruction::StoreVariantInteger instr;
                        instr.propertyIndex = prop->index;
                        instr.value = int(n);
                        output->addInstruction(instr);
                    }
                } else {
                    if (prop->core.isVarProperty()) {
                        Instruction::StoreVarDouble instr;
                        instr.propertyIndex = prop->index;
                        instr.value = n;
                        output->addInstruction(instr);
                    } else {
                        Instruction::StoreVariantDouble instr;
                        instr.propertyIndex = prop->index;
                        instr.value = n;
                        output->addInstruction(instr);
                    }
                }
            } else if (v->value.isBoolean()) {
                if (prop->core.isVarProperty()) {
                    Instruction::StoreVarBool instr;
                    instr.propertyIndex = prop->index;
                    instr.value = v->value.asBoolean();
                    output->addInstruction(instr);
                } else {
                    Instruction::StoreVariantBool instr;
                    instr.propertyIndex = prop->index;
                    instr.value = v->value.asBoolean();
                    output->addInstruction(instr);
                }
            } else {
                if (prop->core.isVarProperty()) {
                    Instruction::StoreVar instr;
                    instr.propertyIndex = prop->index;
                    instr.value = output->indexForString(v->value.asString());
                    output->addInstruction(instr);
                } else {
                    Instruction::StoreVariant instr;
                    instr.propertyIndex = prop->index;
                    instr.value = output->indexForString(v->value.asString());
                    output->addInstruction(instr);
                }
            }
            }
            break;
        case QVariant::String:
            {
            Instruction::StoreString instr;
            instr.propertyIndex = prop->index;
            instr.value = output->indexForString(v->value.asString());
            output->addInstruction(instr);
            }
            break;
        case QVariant::StringList:
            {
            Instruction::StoreStringList instr;
            instr.propertyIndex = prop->index;
            instr.value = output->indexForString(v->value.asString());
            output->addInstruction(instr);
            }
            break;
        case QVariant::ByteArray:
            {
            Instruction::StoreByteArray instr;
            instr.propertyIndex = prop->index;
            instr.value = output->indexForByteArray(v->value.asString().toLatin1());
            output->addInstruction(instr);
            }
            break;
        case QVariant::Url:
            {
            Instruction::StoreUrl instr;
            QString string = v->value.asString();
            // Encoded dir-separators defeat QUrl processing - decode them first
            string.replace(QLatin1String("%2f"), QLatin1String("/"), Qt::CaseInsensitive);
            QUrl u = string.isEmpty() ? QUrl() : output->url.resolved(QUrl(string));
            instr.propertyIndex = prop->index;
            instr.value = output->indexForUrl(u);
            output->addInstruction(instr);
            }
            break;
        case QVariant::UInt:
            {
            Instruction::StoreInteger instr;
            instr.propertyIndex = prop->index;
            instr.value = uint(v->value.asNumber());
            output->addInstruction(instr);
            }
            break;
        case QVariant::Int:
            {
            Instruction::StoreInteger instr;
            instr.propertyIndex = prop->index;
            instr.value = int(v->value.asNumber());
            output->addInstruction(instr);
            }
            break;
        case QMetaType::Float:
            {
            Instruction::StoreFloat instr;
            instr.propertyIndex = prop->index;
            instr.value = float(v->value.asNumber());
            output->addInstruction(instr);
            }
            break;
        case QVariant::Double:
            {
            Instruction::StoreDouble instr;
            instr.propertyIndex = prop->index;
            instr.value = v->value.asNumber();
            output->addInstruction(instr);
            }
            break;
        case QVariant::Color:
            {
            Instruction::StoreColor instr;
            instr.propertyIndex = prop->index;
            instr.value = QQmlStringConverters::rgbaFromString(v->value.asString());
            output->addInstruction(instr);
            }
            break;
#ifndef QT_NO_DATESTRING
        case QVariant::Date:
            {
            Instruction::StoreDate instr;
            QDate d = QQmlStringConverters::dateFromString(v->value.asString());
            instr.propertyIndex = prop->index;
            instr.value = d.toJulianDay();
            output->addInstruction(instr);
            }
            break;
        case QVariant::Time:
            {
            Instruction::StoreTime instr;
            QTime time = QQmlStringConverters::timeFromString(v->value.asString());
            instr.propertyIndex = prop->index;
            Q_ASSERT(sizeof(instr.time) == sizeof(QTime));
            ::memcpy(&instr.time, &time, sizeof(QTime));
            output->addInstruction(instr);
            }
            break;
        case QVariant::DateTime:
            {
            Instruction::StoreDateTime instr;
            QDateTime dateTime = QQmlStringConverters::dateTimeFromString(v->value.asString());
            QTime time = dateTime.time();
            instr.propertyIndex = prop->index;
            instr.date = dateTime.date().toJulianDay();
            Q_ASSERT(sizeof(instr.time) == sizeof(QTime));
            ::memcpy(&instr.time, &time, sizeof(QTime));
            output->addInstruction(instr);
            }
            break;
#endif // QT_NO_DATESTRING
        case QVariant::Point:
            {
            Instruction::StorePoint instr;
            bool ok;
            QPoint point = QQmlStringConverters::pointFFromString(v->value.asString(), &ok).toPoint();
            instr.propertyIndex = prop->index;
            instr.point.xp = point.x();
            instr.point.yp = point.y();
            output->addInstruction(instr);
            }
            break;
        case QVariant::PointF:
            {
            Instruction::StorePointF instr;
            bool ok;
            QPointF point = QQmlStringConverters::pointFFromString(v->value.asString(), &ok);
            instr.propertyIndex = prop->index;
            instr.point.xp = point.x();
            instr.point.yp = point.y();
            output->addInstruction(instr);
            }
            break;
        case QVariant::Size:
            {
            Instruction::StoreSize instr;
            bool ok;
            QSize size = QQmlStringConverters::sizeFFromString(v->value.asString(), &ok).toSize();
            instr.propertyIndex = prop->index;
            instr.size.wd = size.width();
            instr.size.ht = size.height();
            output->addInstruction(instr);
            }
            break;
        case QVariant::SizeF:
            {
            Instruction::StoreSizeF instr;
            bool ok;
            QSizeF size = QQmlStringConverters::sizeFFromString(v->value.asString(), &ok);
            instr.propertyIndex = prop->index;
            instr.size.wd = size.width();
            instr.size.ht = size.height();
            output->addInstruction(instr);
            }
            break;
        case QVariant::Rect:
            {
            Instruction::StoreRect instr;
            bool ok;
            QRect rect = QQmlStringConverters::rectFFromString(v->value.asString(), &ok).toRect();
            instr.propertyIndex = prop->index;
            instr.rect.x1 = rect.left();
            instr.rect.y1 = rect.top();
            instr.rect.x2 = rect.right();
            instr.rect.y2 = rect.bottom();
            output->addInstruction(instr);
            }
            break;
        case QVariant::RectF:
            {
            Instruction::StoreRectF instr;
            bool ok;
            QRectF rect = QQmlStringConverters::rectFFromString(v->value.asString(), &ok);
            instr.propertyIndex = prop->index;
            instr.rect.xp = rect.left();
            instr.rect.yp = rect.top();
            instr.rect.w = rect.width();
            instr.rect.h = rect.height();
            output->addInstruction(instr);
            }
            break;
        case QVariant::Bool:
            {
            Instruction::StoreBool instr;
            bool b = v->value.asBoolean();
            instr.propertyIndex = prop->index;
            instr.value = b;
            output->addInstruction(instr);
            }
            break;
        case QVariant::Vector3D:
            {
            Instruction::StoreVector3D instr;
            instr.propertyIndex = prop->index;
            QQmlStringConverters::createFromString(QMetaType::QVector3D, v->value.asString(), &instr.vector, sizeof(instr.vector));
            output->addInstruction(instr);
            }
            break;
    case QVariant::Vector4D:
            {
            Instruction::StoreVector4D instr;
            instr.propertyIndex = prop->index;
            QQmlStringConverters::createFromString(QMetaType::QVector4D, v->value.asString(), &instr.vector, sizeof(instr.vector));
            output->addInstruction(instr);
            }
            break;
        default:
            {
            // generate single literal value assignment to a list property if required
            if (type == qMetaTypeId<QList<qreal> >()) {
                Instruction::StoreDoubleQList instr;
                instr.propertyIndex = prop->index;
                instr.value = v->value.asNumber();
                output->addInstruction(instr);
                break;
            } else if (type == qMetaTypeId<QList<int> >()) {
                Instruction::StoreIntegerQList instr;
                instr.propertyIndex = prop->index;
                instr.value = int(v->value.asNumber());
                output->addInstruction(instr);
                break;
            } else if (type == qMetaTypeId<QList<bool> >()) {
                Instruction::StoreBoolQList instr;
                bool b = v->value.asBoolean();
                instr.propertyIndex = prop->index;
                instr.value = b;
                output->addInstruction(instr);
                break;
            } else if (type == qMetaTypeId<QList<QUrl> >()) {
                Instruction::StoreUrlQList instr;
                QString string = v->value.asString();
                QUrl u = string.isEmpty() ? QUrl() : output->url.resolved(QUrl(string));
                instr.propertyIndex = prop->index;
                instr.value = output->indexForUrl(u);
                output->addInstruction(instr);
                break;
            } else if (type == qMetaTypeId<QList<QString> >()) {
                Instruction::StoreStringQList instr;
                instr.propertyIndex = prop->index;
                instr.value = output->indexForString(v->value.asString());
                output->addInstruction(instr);
                break;
            } else if (type == qMetaTypeId<QJSValue>()) {
                if (v->value.isBoolean()) {
                    Instruction::StoreJSValueBool instr;
                    instr.propertyIndex = prop->index;
                    instr.value = v->value.asBoolean();
                    output->addInstruction(instr);
                } else if (v->value.isNumber()) {
                    double n = v->value.asNumber();
                    if (double(int(n)) == n) {
                        Instruction::StoreJSValueInteger instr;
                        instr.propertyIndex = prop->index;
                        instr.value = int(n);
                        output->addInstruction(instr);
                    } else {
                        Instruction::StoreJSValueDouble instr;
                        instr.propertyIndex = prop->index;
                        instr.value = n;
                        output->addInstruction(instr);
                    }
                } else {
                    Instruction::StoreJSValueString instr;
                    instr.propertyIndex = prop->index;
                    instr.value = output->indexForString(v->value.asString());
                    output->addInstruction(instr);
                }
                break;
            }

            // otherwise, generate custom type literal assignment
            Instruction::AssignCustomType instr;
            instr.propertyIndex = prop->index;
            instr.primitive = output->indexForString(v->value.asString());
            instr.type = type;
            output->addInstruction(instr);
            }
            break;
    }
}

/*!
    Resets data by clearing the lists that the QQmlCompiler modifies.
*/
void QQmlCompiler::reset(QQmlCompiledData *data)
{
    data->types.clear();
    data->primitives.clear();
    data->datas.clear();
    data->bytecode.resize(0);
}

/*!
    Compile \a unit, and store the output in \a out.  \a engine is the QQmlEngine
    with which the QQmlCompiledData will be associated.

    Returns true on success, false on failure.  On failure, the compile errors
    are available from errors().

    If the environment variant QML_COMPILER_DUMP is set
    (eg. QML_COMPILER_DUMP=1) the compiled instructions will be dumped to stderr
    on a successful compiler.
*/
bool QQmlCompiler::compile(QQmlEngine *engine,
                                   QQmlTypeData *unit,
                                   QQmlCompiledData *out)
{
    exceptions.clear();

    Q_ASSERT(out);
    reset(out);

    QQmlScript::Object *root = unit->parser().tree();
    Q_ASSERT(root);

    this->engine = engine;
    this->enginePrivate = QQmlEnginePrivate::get(engine);
    this->unit = unit;
    this->unitRoot = root;
    this->output = out;

    // Compile types
    const QList<QQmlTypeData::TypeReference>  &resolvedTypes = unit->resolvedTypes();
    QList<QQmlScript::TypeReference *> referencedTypes = unit->parser().referencedTypes();

    for (int ii = 0; ii < resolvedTypes.count(); ++ii) {
        QQmlCompiledData::TypeReference ref;

        const QQmlTypeData::TypeReference &tref = resolvedTypes.at(ii);
        QQmlScript::TypeReference *parserRef = referencedTypes.at(ii);

        if (tref.type) {
            ref.type = tref.type;
            if (!ref.type->isCreatable()) {
                QString err = ref.type->noCreationReason();
                if (err.isEmpty())
                    err = tr( "Element is not creatable.");
                COMPILE_EXCEPTION(parserRef->firstUse, err);
            }
            
            if (ref.type->containsRevisionedAttributes()) {
                QQmlError cacheError;
                ref.typePropertyCache = enginePrivate->cache(ref.type,
                                                             resolvedTypes.at(ii).minorVersion,
                                                             cacheError);
                if (!ref.typePropertyCache) 
                    COMPILE_EXCEPTION(parserRef->firstUse, cacheError.description());
                ref.typePropertyCache->addref();
            }

        } else if (tref.typeData) {
            ref.component = tref.typeData->compiledData();
            ref.component->addref();
        }
        out->types << ref;
    }

    compileTree(root);

    if (!isError()) {
        if (compilerDump())
            out->dumpInstructions();
        if (componentStats)
            dumpStats();
        Q_ASSERT(out->rootPropertyCache);
    } else {
        reset(out);
    }

    compileState = 0;
    output = 0;
    this->engine = 0;
    this->enginePrivate = 0;
    this->unit = 0;
    this->cachedComponentTypeRef = -1;
    this->cachedTranslationContextIndex = -1;
    this->unitRoot = 0;

    return !isError();
}

void QQmlCompiler::compileTree(QQmlScript::Object *tree)
{
    compileState = pool->New<ComponentCompileState>();

    compileState->root = tree;
    if (componentStats)
        componentStats->componentStat.lineNumber = tree->location.start.line;

    // We generate the importCache before we build the tree so that
    // it can be used in the binding compiler.  Given we "expect" the
    // QML compilation to succeed, this isn't a waste.
    output->importCache = new QQmlTypeNameCache();
    foreach (const QString &ns, unit->namespaces()) {
        output->importCache->add(ns);
    }

    int scriptIndex = 0;
    foreach (const QQmlTypeData::ScriptReference &script, unit->resolvedScripts()) {
        QString qualifier = script.qualifier;
        QString enclosingNamespace;

        const int lastDotIndex = qualifier.lastIndexOf(QLatin1Char('.'));
        if (lastDotIndex != -1) {
            enclosingNamespace = qualifier.left(lastDotIndex);
            qualifier = qualifier.mid(lastDotIndex+1);
        }

        output->importCache->add(qualifier, scriptIndex++, enclosingNamespace);
    }

    unit->imports().populateCache(output->importCache);

    if (!buildObject(tree, BindingContext()) || !completeComponentBuild())
        return;

    Instruction::Init init;
    init.bindingsSize = compileState->totalBindingsCount;
    init.parserStatusSize = compileState->parserStatusCount;
    init.contextCache = genContextCache();
    init.objectStackSize = compileState->objectDepth.maxDepth();
    init.listStackSize = compileState->listDepth.maxDepth();
    if (compileState->compiledBindingData.isEmpty())
        init.compiledBinding = -1;
    else
        init.compiledBinding = output->indexForByteArray(compileState->compiledBindingData);
    output->addInstruction(init);

    foreach (const QQmlTypeData::ScriptReference &script, unit->resolvedScripts()) {
        Instruction::StoreImportedScript import;
        import.value = output->scripts.count();

        QQmlScriptData *scriptData = script.script->scriptData();
        scriptData->addref();
        output->scripts << scriptData;
        output->addInstruction(import);
    }

    if (!compileState->v8BindingProgram.isEmpty()) {
        Instruction::InitV8Bindings bindings;
        int index = output->programs.count();

        typedef QQmlCompiledData::V8Program V8Program;
        output->programs.append(V8Program(compileState->v8BindingProgram, output));

        bindings.programIndex = index;
        bindings.line = compileState->v8BindingProgramLine;
        output->addInstruction(bindings);
    }

    genObject(tree);

    Instruction::SetDefault def;
    output->addInstruction(def);

    Instruction::Done done;
    output->addInstruction(done);

    Q_ASSERT(tree->metatype);
    if (!tree->synthdata.isEmpty()) {
        enginePrivate->registerCompositeType(output);
    } else if (output->types.at(tree->type).component) {
        output->metaTypeId = output->types.at(tree->type).component->metaTypeId;
        output->listMetaTypeId = output->types.at(tree->type).component->listMetaTypeId;
    } else {
        Q_ASSERT(output->types.at(tree->type).type);
        output->metaTypeId = output->types.at(tree->type).type->typeId();
        output->listMetaTypeId = output->types.at(tree->type).type->qListTypeId();
    }
    if (!tree->synthdata.isEmpty())
        enginePrivate->registerCompositeType(output);
}

static bool QStringList_contains(const QStringList &list, const QHashedStringRef &string)
{
    for (int ii = 0; ii < list.count(); ++ii)
        if (string == list.at(ii))
            return true;

    return false;
}

bool QQmlCompiler::buildObject(QQmlScript::Object *obj, const BindingContext &ctxt)
{
    if (componentStats)
        componentStats->componentStat.objects++;

    Q_ASSERT (obj->type != -1);
    QQmlCompiledData::TypeReference &tr = output->types[obj->type];
    obj->metatype = tr.createPropertyCache(engine);

    // This object is a "Component" element.
    if (tr.type && obj->metatype->metaObject() == &QQmlComponent::staticMetaObject) {
        COMPILE_CHECK(buildComponent(obj, ctxt));
        return true;
    } 

    if (tr.component) {
        typedef QQmlInstruction I; 
        const I *init = ((const I *)tr.component->bytecode.constData());
        Q_ASSERT(init && tr.component->instructionType(init) == QQmlInstruction::Init);
 
        // Adjust stack depths to include nested components
        compileState->objectDepth.pushPop(init->init.objectStackSize);
        compileState->listDepth.pushPop(init->init.listStackSize);
        compileState->parserStatusCount += init->init.parserStatusSize;
        compileState->totalBindingsCount += init->init.bindingsSize;
    }

    compileState->objectDepth.push();

    // Object instantiations reset the binding context
    BindingContext objCtxt(obj);

    // Create the synthesized meta object, ignoring aliases
    COMPILE_CHECK(checkDynamicMeta(obj)); 
    COMPILE_CHECK(mergeDynamicMetaProperties(obj));
    COMPILE_CHECK(buildDynamicMeta(obj, Normal));

    // Find the native type and check for the QQmlParserStatus interface
    QQmlType *type = toQmlType(obj);
    Q_ASSERT(type);
    obj->parserStatusCast = type->parserStatusCast();
    if (obj->parserStatusCast != -1)
        compileState->parserStatusCount++;

    // Check if this is a custom parser type.  Custom parser types allow
    // assignments to non-existent properties.  These assignments are then
    // compiled by the type.
    bool isCustomParser = output->types.at(obj->type).type &&
                          output->types.at(obj->type).type->customParser() != 0;
    QList<QQmlCustomParserProperty> customProps;

    // Fetch the list of deferred properties
    QStringList deferredList = deferredProperties(obj);

    // Must do id property first.  This is to ensure that the id given to any
    // id reference created matches the order in which the objects are
    // instantiated
    for (Property *prop = obj->properties.first(); prop; prop = obj->properties.next(prop)) {
        if (prop->name() == id_string) {
            COMPILE_CHECK(buildProperty(prop, obj, objCtxt));
            break;
        }
    }

    // Merge 
    Property *defaultProperty = 0;
    Property *skipProperty = 0;
    if (obj->defaultProperty) {
        defaultProperty = obj->defaultProperty;

        Property *explicitProperty = 0;

        QString defaultPropertyName = obj->metatype->defaultPropertyName();
        if (!defaultPropertyName.isEmpty()) {
            QString *s = pool->NewString(defaultPropertyName);
            QHashedStringRef r(*s);

            if (obj->propertiesHashField.test(r.hash())) {
                for (Property *ep = obj->properties.first(); ep; ep = obj->properties.next(ep)) {
                    if (ep->name() == r) {
                        explicitProperty = ep;
                        break;
                    }
                }
            }

            if (!explicitProperty)
                defaultProperty->setName(r);
        }

        if (explicitProperty && !explicitProperty->value && !explicitProperty->values.isEmpty()) {

            skipProperty = explicitProperty; // We merge the values into defaultProperty

            // Find the correct insertion point
            Value *insertPos = 0;

            for (Value *v = defaultProperty->values.first(); v; v = Property::ValueList::next(v)) {
                if (!(v->location.start < explicitProperty->values.first()->location.start))
                    break;
                insertPos = v;
            }

            defaultProperty->values.insertAfter(insertPos, explicitProperty->values);
        } 
    }

    QQmlCustomParser *cp = 0;
    if (isCustomParser)
        cp = output->types.at(obj->type).type->customParser();

    // Build all explicit properties specified
    for (Property *prop = obj->properties.first(); prop; prop = obj->properties.next(prop)) {

        if (prop == skipProperty)
            continue;
        if (prop->name() == id_string)
            continue;

        bool canDefer = false;
        if (isCustomParser) {
            if (doesPropertyExist(prop, obj) &&
                (!(cp->flags() & QQmlCustomParser::AcceptsAttachedProperties) ||
                 !isAttachedPropertyName(prop->name()))) {
                int ids = compileState->ids.count();
                COMPILE_CHECK(buildProperty(prop, obj, objCtxt));
                canDefer = ids == compileState->ids.count();
            } else if (isSignalPropertyName(prop->name()) &&
                    (cp->flags() & QQmlCustomParser::AcceptsSignalHandlers)) {
                COMPILE_CHECK(buildSignal(prop,obj,objCtxt));
            } else {
                customProps << QQmlCustomParserNodePrivate::fromProperty(prop);
            }
        } else {
            if (isSignalPropertyName(prop->name())) {
                COMPILE_CHECK(buildSignal(prop,obj,objCtxt));
            } else {
                int ids = compileState->ids.count();
                COMPILE_CHECK(buildProperty(prop, obj, objCtxt));
                canDefer = ids == compileState->ids.count();
            }
        }

        if (canDefer && !deferredList.isEmpty() && QStringList_contains(deferredList, prop->name()))
            prop->isDeferred = true;

    }

    // Build the default property
    if (defaultProperty)  {
        Property *prop = defaultProperty;

        bool canDefer = false;
        if (isCustomParser) {
            if (doesPropertyExist(prop, obj)) {
                int ids = compileState->ids.count();
                COMPILE_CHECK(buildProperty(prop, obj, objCtxt));
                canDefer = ids == compileState->ids.count();
            } else {
                customProps << QQmlCustomParserNodePrivate::fromProperty(prop);
            }
        } else {
            int ids = compileState->ids.count();
            COMPILE_CHECK(buildProperty(prop, obj, objCtxt));
            canDefer = ids == compileState->ids.count();
        }

        if (canDefer && !deferredList.isEmpty() && QStringList_contains(deferredList, prop->name()))
            prop->isDeferred = true;
    }

    // Compile custom parser parts
    if (isCustomParser && !customProps.isEmpty()) {
        cp->clearErrors();
        cp->compiler = this;
        cp->object = obj;
        obj->custom = cp->compile(customProps);
        cp->compiler = 0;
        cp->object = 0;
        foreach (QQmlError err, cp->errors()) {
            err.setUrl(output->url);
            exceptions << err;
        }
    }

    compileState->objectDepth.pop();

    return true;
}

void QQmlCompiler::genObject(QQmlScript::Object *obj, bool parentToSuper)
{
    QQmlCompiledData::TypeReference &tr = output->types[obj->type];
    if (tr.type && obj->metatype->metaObject() == &QQmlComponent::staticMetaObject) {
        genComponent(obj);
        return;
    }

    // Create the object
    if (obj->custom.isEmpty() && output->types.at(obj->type).type &&
        !output->types.at(obj->type).type->isExtendedType() && obj != compileState->root) {

        Instruction::CreateSimpleObject create;
        create.create = output->types.at(obj->type).type->createFunction();
        create.typeSize = output->types.at(obj->type).type->createSize();
        create.type = obj->type;
        create.line = obj->location.start.line;
        create.column = obj->location.start.column;
        create.parentToSuper = parentToSuper;
        output->addInstruction(create);

    } else {

        if (output->types.at(obj->type).type) {
            Instruction::CreateCppObject create;
            create.line = obj->location.start.line;
            create.column = obj->location.start.column;
            create.data = -1;
            if (!obj->custom.isEmpty())
                create.data = output->indexForByteArray(obj->custom);
            create.type = obj->type;
            create.isRoot = (compileState->root == obj);
            create.parentToSuper = parentToSuper;
            output->addInstruction(create);
        } else {
            Instruction::CreateQMLObject create;
            create.type = obj->type;
            create.isRoot = (compileState->root == obj);

            if (!obj->bindingBitmask.isEmpty()) {
                Q_ASSERT(obj->bindingBitmask.size() % 4 == 0);
                create.bindingBits = output->indexForByteArray(obj->bindingBitmask);
            } else {
                create.bindingBits = -1;
            }
            output->addInstruction(create);

            Instruction::CompleteQMLObject complete;
            complete.line = obj->location.start.line;
            complete.column = obj->location.start.column;
            complete.isRoot = (compileState->root == obj);
            output->addInstruction(complete);
        }
    }

    // Setup the synthesized meta object if necessary
    if (!obj->synthdata.isEmpty()) {
        Instruction::StoreMetaObject meta;
        meta.aliasData = output->indexForByteArray(obj->synthdata);
        meta.propertyCache = output->propertyCaches.count();

        QQmlPropertyCache *propertyCache = obj->synthCache;
        Q_ASSERT(propertyCache);
        propertyCache->addref();

        if (obj == unitRoot) {
            propertyCache->addref();
            output->rootPropertyCache = propertyCache;
        }

        output->propertyCaches << propertyCache;
        output->addInstruction(meta);
    } else if (obj == unitRoot) {
        output->rootPropertyCache = tr.createPropertyCache(engine);
        output->rootPropertyCache->addref();
    }

    // Set the object id
    if (!obj->id.isEmpty()) {
        Instruction::SetId id;
        id.value = output->indexForString(obj->id);
        id.index = obj->idIndex;
        output->addInstruction(id);
    }

    // Begin the class
    if (tr.type && obj->parserStatusCast != -1) {
        Instruction::BeginObject begin;
        begin.castValue = obj->parserStatusCast;
        output->addInstruction(begin);
    }

    genObjectBody(obj);
}

void QQmlCompiler::genObjectBody(QQmlScript::Object *obj)
{
    for (Property *prop = obj->scriptStringProperties.first(); prop; prop = Object::PropertyList::next(prop)) {
        Q_ASSERT(prop->scriptStringScope != -1);
        const QString &script = prop->values.first()->value.asScript();
        Instruction::StoreScriptString ss;
        ss.propertyIndex = prop->index;
        ss.value = output->indexForString(script);
        ss.scope = prop->scriptStringScope;
//        ss.bindingId = rewriteBinding(script, prop->name());
        ss.bindingId = rewriteBinding(prop->values.first()->value, QString()); // XXX
        ss.line = prop->location.start.line;
        ss.column = prop->location.start.column;
        ss.isStringLiteral = prop->values.first()->value.isString();
        ss.isNumberLiteral = prop->values.first()->value.isNumber();
        ss.numberValue = prop->values.first()->value.asNumber();
        output->addInstruction(ss);
    }

    bool seenDefer = false;
    for (Property *prop = obj->valueProperties.first(); prop; prop = Object::PropertyList::next(prop)) {
        if (prop->isDeferred) {
            seenDefer = true;
            continue;
        }
        if (!prop->isAlias)
            genValueProperty(prop, obj);
    }
    if (seenDefer) {
        Instruction::Defer defer;
        defer.deferCount = 0;
        int deferIdx = output->addInstruction(defer);
        int nextInstructionIndex = output->nextInstructionIndex();

        Instruction::DeferInit dinit;
        // XXX - these are now massive over allocations
        dinit.bindingsSize = compileState->totalBindingsCount;
        dinit.parserStatusSize = compileState->parserStatusCount; 
        dinit.objectStackSize = compileState->objectDepth.maxDepth(); 
        dinit.listStackSize = compileState->listDepth.maxDepth(); 
        output->addInstruction(dinit);

        for (Property *prop = obj->valueProperties.first(); prop; prop = Object::PropertyList::next(prop)) {
            if (!prop->isDeferred)
                continue;
            genValueProperty(prop, obj);
        }

        Instruction::Done done;
        output->addInstruction(done);

        output->instruction(deferIdx)->defer.deferCount = output->nextInstructionIndex() - nextInstructionIndex;
    }

    for (Property *prop = obj->signalProperties.first(); prop; prop = Object::PropertyList::next(prop)) {

        QQmlScript::Value *v = prop->values.first();

        if (v->type == Value::SignalObject) {

            genObject(v->object);

            Instruction::AssignSignalObject assign;
            assign.line = v->location.start.line;
            assign.signal = output->indexForString(prop->name().toString());
            output->addInstruction(assign);

        } else if (v->type == Value::SignalExpression) {

            Instruction::StoreSignal store;
            store.signalIndex = prop->index;

            const QList<QByteArray> &parameterNameList = obj->metatype->signalParameterNames(prop->index);
            QQmlRewrite::RewriteSignalHandler rewriter;
            int count = 0;
            const QString &rewrite = rewriter(v->value.asAST(), v->value.asScript(),
                                              prop->name().toString(),
                                              obj->metatype->signalParameterStringForJS(prop->index, &count),
                                              parameterNameList);
            store.value = output->indexForByteArray(rewrite.toUtf8());
            store.parameterCount =
                    (rewriter.parameterAccess() == QQmlRewrite::RewriteSignalHandler::ParametersUnaccessed) ? 0 : count;
            store.context = v->signalExpressionContextStack;
            store.line = v->location.start.line;
            store.column = v->location.start.column;
            output->addInstruction(store);

        }

    }

    for (Property *prop = obj->attachedProperties.first(); prop; prop = Object::PropertyList::next(prop)) {
        Instruction::FetchAttached fetch;
        fetch.id = prop->index;
        fetch.line = prop->location.start.line;
        output->addInstruction(fetch);

        genObjectBody(prop->value);

        Instruction::PopFetchedObject pop;
        output->addInstruction(pop);
    }

    for (Property *prop = obj->groupedProperties.first(); prop; prop = Object::PropertyList::next(prop)) {
        Instruction::FetchObject fetch;
        fetch.property = prop->index;
        fetch.line = prop->location.start.line;
        output->addInstruction(fetch);

        if (!prop->value->synthdata.isEmpty()) {
            Instruction::StoreMetaObject meta;
            meta.aliasData = output->indexForByteArray(prop->value->synthdata);
            meta.propertyCache = output->propertyCaches.count();
            QQmlPropertyCache *propertyCache = prop->value->synthCache;
            Q_ASSERT(propertyCache);
            propertyCache->addref();
            output->propertyCaches << propertyCache;
            output->addInstruction(meta);
        }

        genObjectBody(prop->value);

        Instruction::PopFetchedObject pop;
        output->addInstruction(pop);
    }

    for (Property *prop = obj->valueTypeProperties.first(); prop; prop = Object::PropertyList::next(prop)) {
        if (!prop->isAlias)
            genValueTypeProperty(obj, prop);
    }

    for (Property *prop = obj->valueProperties.first(); prop; prop = Object::PropertyList::next(prop)) {
        if (prop->isDeferred) 
            continue;
        if (prop->isAlias)
            genValueProperty(prop, obj);
    }

    for (Property *prop = obj->valueTypeProperties.first(); prop; prop = Object::PropertyList::next(prop)) {
        if (prop->isAlias)
            genValueTypeProperty(obj, prop);
    }
}

void QQmlCompiler::genValueTypeProperty(QQmlScript::Object *obj,QQmlScript::Property *prop)
{
    Instruction::FetchValueType fetch;
    fetch.property = prop->index;
    fetch.type = prop->type;
    fetch.bindingSkipList = 0;

    if (obj->type == -1 || output->types.at(obj->type).component) {
        // We only have to do this if this is a composite type.  If it is a builtin
        // type it can't possibly already have bindings that need to be cleared.
        for (Property *vprop = prop->value->valueProperties.first(); vprop; vprop = Object::PropertyList::next(vprop)) {
            if (!vprop->values.isEmpty()) {
                Q_ASSERT(vprop->index >= 0 && vprop->index < 32);
                fetch.bindingSkipList |= (1 << vprop->index);
            }
        }
    }

    output->addInstruction(fetch);

    for (Property *vprop = prop->value->valueProperties.first(); vprop; vprop = Object::PropertyList::next(vprop)) {
        genPropertyAssignment(vprop, prop->value, prop);
    }

    Instruction::PopValueType pop;
    pop.property = prop->index;
    pop.type = prop->type;
    pop.bindingSkipList = 0;
    output->addInstruction(pop);

    genPropertyAssignment(prop, obj);
}

void QQmlCompiler::genComponent(QQmlScript::Object *obj)
{
    QQmlScript::Object *root = obj->defaultProperty->values.first()->object;
    Q_ASSERT(root);

    Instruction::CreateComponent create;
    create.line = root->location.start.line;
    create.column = root->location.start.column;
    create.endLine = root->location.end.line;
    create.isRoot = (compileState->root == obj);
    int createInstruction = output->addInstruction(create);
    int nextInstructionIndex = output->nextInstructionIndex();

    ComponentCompileState *oldCompileState = compileState;
    compileState = componentState(root);

    Instruction::Init init;
    init.bindingsSize = compileState->totalBindingsCount;
    init.parserStatusSize = compileState->parserStatusCount;
    init.contextCache = genContextCache();
    init.objectStackSize = compileState->objectDepth.maxDepth();
    init.listStackSize = compileState->listDepth.maxDepth();
    if (compileState->compiledBindingData.isEmpty())
        init.compiledBinding = -1;
    else
        init.compiledBinding = output->indexForByteArray(compileState->compiledBindingData);
    output->addInstruction(init);

    if (!compileState->v8BindingProgram.isEmpty()) {
        Instruction::InitV8Bindings bindings;
        int index = output->programs.count();

        typedef QQmlCompiledData::V8Program V8Program;
        output->programs.append(V8Program(compileState->v8BindingProgram, output));

        bindings.programIndex = index;
        bindings.line = compileState->v8BindingProgramLine;
        output->addInstruction(bindings);
    }

    genObject(root);

    Instruction::SetDefault def;
    output->addInstruction(def);

    Instruction::Done done;
    output->addInstruction(done);

    output->instruction(createInstruction)->createComponent.count = 
        output->nextInstructionIndex() - nextInstructionIndex;

    compileState = oldCompileState;

    if (!obj->id.isEmpty()) {
        Instruction::SetId id;
        id.value = output->indexForString(obj->id);
        id.index = obj->idIndex;
        output->addInstruction(id);
    }

    if (obj == unitRoot) {
        output->rootPropertyCache = output->types[obj->type].createPropertyCache(engine);
        output->rootPropertyCache->addref();
    }
}

bool QQmlCompiler::buildComponent(QQmlScript::Object *obj,
                                 const BindingContext &ctxt)
{
    // The special "Component" element can only have the id property and a
    // default property, that actually defines the component's tree

    compileState->objectDepth.push();

    // Find, check and set the "id" property (if any)
    Property *idProp = 0;
    if (obj->properties.isMany() ||
       (obj->properties.isOne() && obj->properties.first()->name() != id_string))
        COMPILE_EXCEPTION(obj->properties.first(), tr("Component elements may not contain properties other than id"));
       
    if (!obj->properties.isEmpty())
        idProp = obj->properties.first();

    if (idProp) {
       if (idProp->value || idProp->values.isMany() || idProp->values.first()->object) 
           COMPILE_EXCEPTION(idProp, tr("Invalid component id specification"));
       COMPILE_CHECK(checkValidId(idProp->values.first(), idProp->values.first()->primitive()))

        QString idVal = idProp->values.first()->primitive();

        if (compileState->ids.value(idVal))
            COMPILE_EXCEPTION(idProp, tr("id is not unique"));

        obj->id = idVal;
        addId(idVal, obj);
    }

    // Check the Component tree is well formed
    if (obj->defaultProperty &&
       (obj->defaultProperty->value || obj->defaultProperty->values.isMany() ||
        (obj->defaultProperty->values.isOne() && !obj->defaultProperty->values.first()->object)))
        COMPILE_EXCEPTION(obj, tr("Invalid component body specification"));

    if (!obj->dynamicProperties.isEmpty())
        COMPILE_EXCEPTION(obj, tr("Component objects cannot declare new properties."));
    if (!obj->dynamicSignals.isEmpty())
        COMPILE_EXCEPTION(obj, tr("Component objects cannot declare new signals."));
    if (!obj->dynamicSlots.isEmpty())
        COMPILE_EXCEPTION(obj, tr("Component objects cannot declare new functions."));

    QQmlScript::Object *root = 0;
    if (obj->defaultProperty && !obj->defaultProperty->values.isEmpty())
        root = obj->defaultProperty->values.first()->object;

    if (!root)
        COMPILE_EXCEPTION(obj, tr("Cannot create empty component specification"));

    // Build the component tree
    COMPILE_CHECK(buildComponentFromRoot(root, ctxt));

    compileState->objectDepth.pop();

    return true;
}

bool QQmlCompiler::buildComponentFromRoot(QQmlScript::Object *obj,
                                         const BindingContext &ctxt)
{
    ComponentCompileState *oldComponentCompileState = compileState;
    compileState = pool->New<ComponentCompileState>();
    compileState->root = obj;
    compileState->nested = true;

    if (componentStats) {
        ComponentStat oldComponentStat = componentStats->componentStat;

        componentStats->componentStat = ComponentStat();
        componentStats->componentStat.lineNumber = obj->location.start.line;

        if (obj)
            COMPILE_CHECK(buildObject(obj, ctxt));

        COMPILE_CHECK(completeComponentBuild());

        componentStats->componentStat = oldComponentStat;
    } else {
        if (obj)
            COMPILE_CHECK(buildObject(obj, ctxt));

        COMPILE_CHECK(completeComponentBuild());
    }

    compileState = oldComponentCompileState;

    return true;
}


// Build a sub-object.  A sub-object is one that was not created directly by
// QML - such as a grouped property object, or an attached object.  Sub-object's
// can't have an id, involve a custom parser, have attached properties etc.
bool QQmlCompiler::buildSubObject(QQmlScript::Object *obj, const BindingContext &ctxt)
{
    Q_ASSERT(obj->metatype);
    Q_ASSERT(!obj->defaultProperty);
    Q_ASSERT(ctxt.isSubContext()); // sub-objects must always be in a binding
                                   // sub-context

    for (Property *prop = obj->properties.first(); prop; prop = obj->properties.next(prop)) {
        if (isSignalPropertyName(prop->name())) {
            COMPILE_CHECK(buildSignal(prop, obj, ctxt));
        } else {
            COMPILE_CHECK(buildProperty(prop, obj, ctxt));
        }
    }

    return true;
}

int QQmlCompiler::componentTypeRef()
{
    if (cachedComponentTypeRef == -1) {
        QQmlType *t = QQmlMetaType::qmlType(Component_string, Component_module_string, 1, 0);
        for (int ii = output->types.count() - 1; ii >= 0; --ii) {
            if (output->types.at(ii).type == t) {
                cachedComponentTypeRef = ii;
                return ii;
            }
        }
        QQmlCompiledData::TypeReference ref;
        ref.type = t;
        output->types << ref;
        cachedComponentTypeRef = output->types.count() - 1;
    }
    return cachedComponentTypeRef;
}

int QQmlCompiler::translationContextIndex()
{
    if (cachedTranslationContextIndex == -1) {
        // This code must match that in the qsTr() implementation
        const QString &path = output->name;
        int lastSlash = path.lastIndexOf(QLatin1Char('/'));
        QString context = (lastSlash > -1) ? path.mid(lastSlash + 1, path.length()-lastSlash-5) :
                                             QString();
        QByteArray contextUtf8 = context.toUtf8();
        cachedTranslationContextIndex = output->indexForByteArray(contextUtf8);
    }
    return cachedTranslationContextIndex;
}

bool QQmlCompiler::buildSignal(QQmlScript::Property *prop, QQmlScript::Object *obj,
                                       const BindingContext &ctxt)
{
    Q_ASSERT(obj->metatype);

    const QHashedStringRef &propName = prop->name();

    Q_ASSERT(propName.startsWith(on_string));
    QString name = propName.mid(2, -1).toString();

    // Note that the property name could start with any alpha or '_' or '$' character,
    // so we need to do the lower-casing of the first alpha character.
    for (int firstAlphaIndex = 0; firstAlphaIndex < name.size(); ++firstAlphaIndex) {
        if (name.at(firstAlphaIndex).isUpper()) {
            name[firstAlphaIndex] = name.at(firstAlphaIndex).toLower();
            break;
        }
    }

    bool notInRevision = false;

    QQmlPropertyData *sig = signal(obj, QStringRef(&name), &notInRevision);

    if (sig == 0) {

        if (notInRevision && 0 == property(obj, propName, 0)) {
            Q_ASSERT(obj->type != -1);
            const QList<QQmlTypeData::TypeReference>  &resolvedTypes = unit->resolvedTypes();
            const QQmlTypeData::TypeReference &type = resolvedTypes.at(obj->type);
            if (type.type) {
                COMPILE_EXCEPTION(prop, tr("\"%1.%2\" is not available in %3 %4.%5.").arg(elementName(obj)).arg(prop->name().toString()).arg(type.type->module()).arg(type.majorVersion).arg(type.minorVersion));
            } else {
                COMPILE_EXCEPTION(prop, tr("\"%1.%2\" is not available due to component versioning.").arg(elementName(obj)).arg(prop->name().toString()));
            }
        }

        // If the "on<Signal>" name doesn't resolve into a signal, try it as a
        // property.
        COMPILE_CHECK(buildProperty(prop, obj, ctxt));

    }  else {

        if (prop->value || !prop->values.isOne())
            COMPILE_EXCEPTION(prop, tr("Incorrectly specified signal assignment"));

        prop->index = propertyCacheForObject(obj)->methodIndexToSignalIndex(sig->coreIndex);
        prop->core = *sig;

        obj->addSignalProperty(prop);

        if (prop->values.first()->object) {
            COMPILE_CHECK(buildObject(prop->values.first()->object, ctxt));
            prop->values.first()->type = Value::SignalObject;
        } else {
            prop->values.first()->type = Value::SignalExpression;

            if (!prop->values.first()->value.isScript())
                COMPILE_EXCEPTION(prop, tr("Cannot assign a value to a signal (expecting a script to be run)"));

            QString script = prop->values.first()->value.asScript().trimmed();
            if (script.isEmpty())
                COMPILE_EXCEPTION(prop, tr("Empty signal assignment"));

            //all handlers should be on the original, rather than cloned signals in order
            //to ensure all parameters are available (see qqmlboundsignal constructor for more details)
            prop->index = obj->metatype->originalClone(prop->index);

            QString errorString;
            obj->metatype->signalParameterStringForJS(prop->index, 0, &errorString);
            if (!errorString.isEmpty())
                COMPILE_EXCEPTION(prop, errorString);

            prop->values.first()->signalExpressionContextStack = ctxt.stack;
        }
    }

    return true;
}


/*!
    Returns true if (value) property \a prop exists on obj, false otherwise.
*/
bool QQmlCompiler::doesPropertyExist(QQmlScript::Property *prop,
                                             QQmlScript::Object *obj)
{
    if (prop->name().isEmpty())
        return false;
    if(isAttachedPropertyName(prop->name()) || prop->name() == id_string)
        return true;

    return property(obj, prop->name()) != 0;
}

bool QQmlCompiler::buildProperty(QQmlScript::Property *prop,
                                         QQmlScript::Object *obj,
                                         const BindingContext &ctxt)
{
    if (prop->isEmpty()) 
        COMPILE_EXCEPTION(prop, tr("Empty property assignment"));

    if (isAttachedPropertyName(prop->name())) {
        // Setup attached property data

        if (ctxt.isSubContext()) {
            // Attached properties cannot be used on sub-objects.  Sub-objects
            // always exist in a binding sub-context, which is what we test
            // for here.
            COMPILE_EXCEPTION(prop, tr("Attached properties cannot be used here"));
        }

        QQmlType *type = 0;
        QQmlImportNamespace *typeNamespace = 0;
        unit->imports().resolveType(prop->name(), &type, 0, 0, 0, &typeNamespace);

        if (typeNamespace) {
            COMPILE_CHECK(buildPropertyInNamespace(typeNamespace, prop, obj, 
                                                   ctxt));
            return true;
        } else if (!type || !type->attachedPropertiesType())  {
            COMPILE_EXCEPTION(prop, tr("Non-existent attached object"));
        }

        if (!prop->value)
            COMPILE_EXCEPTION(prop, tr("Invalid attached object assignment"));

        Q_ASSERT(type->attachedPropertiesFunction());
        prop->index = type->attachedPropertiesId();
        prop->value->metatype = enginePrivate->cache(type->attachedPropertiesType());
    } else {
        // Setup regular property data
        bool notInRevision = false;
        QQmlPropertyData *d =
            prop->name().isEmpty()?0:property(obj, prop->name(), &notInRevision);

        if (d == 0 && notInRevision) {
            const QList<QQmlTypeData::TypeReference>  &resolvedTypes = unit->resolvedTypes();
            const QQmlTypeData::TypeReference &type = resolvedTypes.at(obj->type);
            if (type.type) {
                COMPILE_EXCEPTION(prop, tr("\"%1.%2\" is not available in %3 %4.%5.").arg(elementName(obj)).arg(prop->name().toString()).arg(type.type->module()).arg(type.majorVersion).arg(type.minorVersion));
            } else {
                COMPILE_EXCEPTION(prop, tr("\"%1.%2\" is not available due to component versioning.").arg(elementName(obj)).arg(prop->name().toString()));
            }
        } else if (d) {
            prop->index = d->coreIndex;
            prop->core = *d;
        } else if (prop->isDefault) {
            QString defaultPropertyName = obj->metatype->defaultPropertyName();

            if (!defaultPropertyName.isEmpty()) {
                prop->setName(defaultPropertyName);
                prop->core = *obj->metatype->defaultProperty();
                prop->index = prop->core.coreIndex;
            }
        }

        // We can't error here as the "id" property does not require a
        // successful index resolution
        if (prop->index != -1) 
            prop->type = prop->core.propType;

        // Check if this is an alias
        if (prop->index != -1 && 
            prop->parent && 
            prop->parent->type != -1 && 
            output->types.at(prop->parent->type).component) {

            QQmlPropertyCache *cache = output->types.at(prop->parent->type).component->rootPropertyCache;
            if (cache && cache->property(prop->index) && cache->property(prop->index)->isAlias())
                prop->isAlias = true;
        }

        if (prop->index != -1 && !prop->values.isEmpty()) 
            prop->parent->setBindingBit(prop->index);
    }

    if (!prop->isDefault && prop->name() == id_string && !ctxt.isSubContext()) {

        // The magic "id" behavior doesn't apply when "id" is resolved as a
        // default property or to sub-objects (which are always in binding
        // sub-contexts)
        COMPILE_CHECK(buildIdProperty(prop, obj));
        if (prop->type == QVariant::String &&
            prop->values.first()->value.isString())
            COMPILE_CHECK(buildPropertyAssignment(prop, obj, ctxt));

    } else if (isAttachedPropertyName(prop->name())) {

        COMPILE_CHECK(buildAttachedProperty(prop, obj, ctxt));

    } else if (prop->index == -1) {

        if (prop->isDefault) {
            COMPILE_EXCEPTION(prop->values.first(), tr("Cannot assign to non-existent default property"));
        } else {
            COMPILE_EXCEPTION(prop, tr("Cannot assign to non-existent property \"%1\"").arg(prop->name().toString()));
        }

    } else if (prop->value) {

        COMPILE_CHECK(buildGroupedProperty(prop, obj, ctxt));

    } else if (prop->core.isQList()) {

        COMPILE_CHECK(buildListProperty(prop, obj, ctxt));

    } else if (prop->type == qMetaTypeId<QQmlScriptString>()) {

        COMPILE_CHECK(buildScriptStringProperty(prop, obj, ctxt));

    } else {

        COMPILE_CHECK(buildPropertyAssignment(prop, obj, ctxt));

    }

    return true;
}

bool QQmlCompiler::buildPropertyInNamespace(QQmlImportNamespace *ns,
                                            QQmlScript::Property *nsProp,
                                            QQmlScript::Object *obj,
                                            const BindingContext &ctxt)
{
    if (!nsProp->value)
        COMPILE_EXCEPTION(nsProp, tr("Invalid use of namespace"));

    for (Property *prop = nsProp->value->properties.first(); prop; prop = nsProp->value->properties.next(prop)) {

        if (!isAttachedPropertyName(prop->name()))
            COMPILE_EXCEPTION(prop, tr("Not an attached property name"));

        // Setup attached property data

        QQmlType *type = 0;
        unit->imports().resolveType(ns, prop->name(), &type, 0, 0, 0);

        if (!type || !type->attachedPropertiesType()) 
            COMPILE_EXCEPTION(prop, tr("Non-existent attached object"));

        if (!prop->value)
            COMPILE_EXCEPTION(prop, tr("Invalid attached object assignment"));

        Q_ASSERT(type->attachedPropertiesFunction());
        prop->index = type->index();
        prop->value->metatype = enginePrivate->cache(type->attachedPropertiesType());

        COMPILE_CHECK(buildAttachedProperty(prop, obj, ctxt));
    }

    return true;
}

void QQmlCompiler::genValueProperty(QQmlScript::Property *prop,
                                   QQmlScript::Object *obj)
{
    if (prop->core.isQList()) {
        genListProperty(prop, obj);
    } else {
        genPropertyAssignment(prop, obj);
    }
}

void QQmlCompiler::genListProperty(QQmlScript::Property *prop,
                                  QQmlScript::Object *obj)
{
    int listType = enginePrivate->listType(prop->type);

    Instruction::FetchQList fetch;
    fetch.property = prop->index;
    bool listTypeIsInterface = QQmlMetaType::isInterface(listType);
    fetch.type = listType;
    output->addInstruction(fetch);

    for (Value *v = prop->values.first(); v; v = Property::ValueList::next(v)) {

        if (v->type == Value::CreatedObject) {

            genObject(v->object);
            if (listTypeIsInterface) {
                Instruction::AssignObjectList assign;
                assign.line = prop->location.start.line;
                output->addInstruction(assign);
            } else {
                Instruction::StoreObjectQList store;
                output->addInstruction(store);
            }

        } else if (v->type == Value::PropertyBinding) {

            genBindingAssignment(v, prop, obj);

        }

    }

    Instruction::PopQList pop;
    output->addInstruction(pop);
}

void QQmlCompiler::genPropertyAssignment(QQmlScript::Property *prop,
                                        QQmlScript::Object *obj,
                                        QQmlScript::Property *valueTypeProperty)
{
    for (Value *v = prop->values.first(); v; v = Property::ValueList::next(v)) {

        Q_ASSERT(v->type == Value::CreatedObject ||
                 v->type == Value::PropertyBinding ||
                 v->type == Value::Literal);

        if (v->type == Value::CreatedObject) {

            genObject(v->object);

            if (QQmlMetaType::isInterface(prop->type)) {

                Instruction::StoreInterface store;
                store.line = v->object->location.start.line;
                store.propertyIndex = prop->index;
                output->addInstruction(store);

            } else if (prop->type == QMetaType::QVariant) {

                if (prop->core.isVarProperty()) {
                    Instruction::StoreVarObject store;
                    store.line = v->object->location.start.line;
                    store.propertyIndex = prop->index;
                    output->addInstruction(store);
                } else {
                    Instruction::StoreVariantObject store;
                    store.line = v->object->location.start.line;
                    store.propertyIndex = prop->index;
                    output->addInstruction(store);
                }


            } else {

                Instruction::StoreObject store;
                store.line = v->object->location.start.line;
                store.propertyIndex = prop->index;
                output->addInstruction(store);

            }
        } else if (v->type == Value::PropertyBinding) {

            genBindingAssignment(v, prop, obj, valueTypeProperty);

        } else if (v->type == Value::Literal) {

            genLiteralAssignment(prop, v);

        }

    }

    for (Value *v = prop->onValues.first(); v; v = Property::ValueList::next(v)) {

        Q_ASSERT(v->type == Value::ValueSource ||
                 v->type == Value::ValueInterceptor);

        if (v->type == Value::ValueSource) {
            genObject(v->object, valueTypeProperty?true:false);

            Instruction::StoreValueSource store;
            if (valueTypeProperty)
                store.property = genValueTypeData(prop, valueTypeProperty);
            else
                store.property = prop->core;
            QQmlType *valueType = toQmlType(v->object);
            store.castValue = valueType->propertyValueSourceCast();
            output->addInstruction(store);

        } else if (v->type == Value::ValueInterceptor) {
            genObject(v->object, valueTypeProperty?true:false);

            Instruction::StoreValueInterceptor store;
            if (valueTypeProperty)
                store.property = genValueTypeData(prop, valueTypeProperty);
            else
                store.property = prop->core;
            QQmlType *valueType = toQmlType(v->object);
            store.castValue = valueType->propertyValueInterceptorCast();
            output->addInstruction(store);
        }

    }
}

bool QQmlCompiler::buildIdProperty(QQmlScript::Property *prop,
                                  QQmlScript::Object *obj)
{
    if (prop->value ||
        prop->values.isMany() ||
        prop->values.first()->object)
        COMPILE_EXCEPTION(prop, tr("Invalid use of id property"));

    QQmlScript::Value *idValue = prop->values.first();
    QString val = idValue->primitive();

    COMPILE_CHECK(checkValidId(idValue, val));

    if (compileState->ids.value(val))
        COMPILE_EXCEPTION(prop, tr("id is not unique"));

    prop->values.first()->type = Value::Id;

    obj->id = val;
    addId(val, obj);

    return true;
}

void QQmlCompiler::addId(const QString &id, QQmlScript::Object *obj)
{
    Q_UNUSED(id);
    Q_ASSERT(!compileState->ids.value(id));
    Q_ASSERT(obj->id == id);
    obj->idIndex = compileState->ids.count();
    compileState->ids.append(obj);
}

void QQmlCompiler::addBindingReference(JSBindingReference *ref)
{
    Q_ASSERT(ref->value && !ref->value->bindingReference);
    ref->value->bindingReference = ref;
    compileState->totalBindingsCount++;
    compileState->bindings.prepend(ref);
}

void QQmlCompiler::saveComponentState()
{
    Q_ASSERT(compileState->root);
    Q_ASSERT(compileState->root->componentCompileState == 0);

    compileState->root->componentCompileState = compileState;

    if (componentStats) 
        componentStats->savedComponentStats.append(componentStats->componentStat);
}

QQmlCompilerTypes::ComponentCompileState *
QQmlCompiler::componentState(QQmlScript::Object *obj)
{
    Q_ASSERT(obj->componentCompileState);
    return obj->componentCompileState;
}

// Build attached property object.  In this example,
// Text {
//    GridView.row: 10
// }
// GridView is an attached property object.
bool QQmlCompiler::buildAttachedProperty(QQmlScript::Property *prop,
                                        QQmlScript::Object *obj,
                                        const BindingContext &ctxt)
{
    Q_ASSERT(prop->value);
    Q_ASSERT(prop->index != -1); // This is set in buildProperty()

    compileState->objectDepth.push();

    obj->addAttachedProperty(prop);

    COMPILE_CHECK(buildSubObject(prop->value, ctxt.incr()));

    compileState->objectDepth.pop();

    return true;
}


// Build "grouped" properties. In this example:
// Text {
//     font.pointSize: 12
//     font.family: "Helvetica"
// }
// font is a nested property.  pointSize and family are not.
bool QQmlCompiler::buildGroupedProperty(QQmlScript::Property *prop,
                                                QQmlScript::Object *obj,
                                                const BindingContext &ctxt)
{
    Q_ASSERT(prop->type != 0);
    Q_ASSERT(prop->index != -1);

    if (QQmlValueTypeFactory::isValueType(prop->type)) {
        QQmlValueType *valueType = QQmlValueTypeFactory::valueType(prop->type);
        if (prop->type >= 0 && valueType) {
            if (!prop->values.isEmpty()) {
                // Only error if we are assigning values, and not e.g. a property interceptor
                for (Property *dotProp = prop->value->properties.first(); dotProp; dotProp = prop->value->properties.next(dotProp)) {
                    if (!dotProp->values.isEmpty()) {
                        if (prop->values.first()->location < prop->value->location) {
                            COMPILE_EXCEPTION(prop->value, tr( "Property has already been assigned a value"));
                        } else {
                            COMPILE_EXCEPTION(prop->values.first(), tr( "Property has already been assigned a value"));
                        }
                    }
                }
            }

            if (!prop->core.isWritable() && !prop->isReadOnlyDeclaration) {
                COMPILE_EXCEPTION(prop, tr( "Invalid property assignment: \"%1\" is a read-only property").arg(prop->name().toString()));
            }

            if (prop->isAlias) {
                for (Property *vtProp = prop->value->properties.first(); vtProp; vtProp = prop->value->properties.next(vtProp)) {
                    vtProp->isAlias = true;
                }
            }

            COMPILE_CHECK(buildValueTypeProperty(valueType, prop->value, obj, ctxt.incr()));

            // When building a value type where sub components are declared, this
            // code path is followed from buildProperty, even if there is a previous
            // assignment to the value type as a whole. Therefore we need to look
            // for (and build) assignments to the entire value type before looking
            // for any onValue assignments.
            for (Value *v = prop->values.first(); v; v = Property::ValueList::next(v)) {
                if (v->object) {
                    COMPILE_EXCEPTION(v->object, tr("Objects cannot be assigned to value types"));
                }
                COMPILE_CHECK(buildPropertyLiteralAssignment(prop, obj, v, ctxt));
            }

            for (Value *v = prop->onValues.first(); v; v = Property::ValueList::next(v)) {
                Q_ASSERT(v->object);
                COMPILE_CHECK(buildPropertyOnAssignment(prop, obj, obj, v, ctxt));
            }

            obj->addValueTypeProperty(prop);
        } else {
            COMPILE_EXCEPTION(prop, tr("Invalid grouped property access"));
        }
    } else {
        // Load the nested property's meta type
        prop->value->metatype = enginePrivate->propertyCacheForType(prop->type);
        if (!prop->value->metatype)
            COMPILE_EXCEPTION(prop, tr("Invalid grouped property access"));

        if (!prop->values.isEmpty()) 
            COMPILE_EXCEPTION(prop->values.first(), tr( "Cannot assign a value directly to a grouped property"));

        obj->addGroupedProperty(prop);

        compileState->objectDepth.push();

        COMPILE_CHECK(buildSubObject(prop->value, ctxt.incr()));

        compileState->objectDepth.pop();
    }

    return true;
}

bool QQmlCompiler::buildValueTypeProperty(QObject *type,
                                                  QQmlScript::Object *obj,
                                                  QQmlScript::Object *baseObj,
                                                  const BindingContext &ctxt)
{
    compileState->objectDepth.push();

    if (obj->defaultProperty)
        COMPILE_EXCEPTION(obj, tr("Invalid property use"));
    obj->metatype = enginePrivate->cache(type);

    for (Property *prop = obj->properties.first(); prop; prop = obj->properties.next(prop)) {

        QQmlPropertyData *d = property(obj, prop->name());
        if (d == 0) 
            COMPILE_EXCEPTION(prop, tr("Cannot assign to non-existent property \"%1\"").arg(prop->name().toString()));

        prop->index = d->coreIndex;
        prop->type = d->propType;
        prop->core = *d;
        prop->isValueTypeSubProperty = true;

        if (prop->value)
            COMPILE_EXCEPTION(prop, tr("Property assignment expected"));

        if (prop->values.isMany()) {
            COMPILE_EXCEPTION(prop, tr("Single property assignment expected"));
        } else if (!prop->values.isEmpty()) {
            QQmlScript::Value *value = prop->values.first();

            if (value->object) {
                COMPILE_EXCEPTION(prop, tr("Unexpected object assignment"));
            } else if (value->value.isScript()) {
                // ### Check for writability

                //optimization for <Type>.<EnumValue> enum assignments
                bool isEnumAssignment = false;

                if (prop->core.isEnum() || prop->core.propType == QMetaType::Int)
                    COMPILE_CHECK(testQualifiedEnumAssignment(prop, obj, value, &isEnumAssignment));

                if (isEnumAssignment) {
                    value->type = Value::Literal;
                } else {
                    JSBindingReference *reference = pool->New<JSBindingReference>();
                    reference->expression = value->value;
                    reference->property = prop;
                    reference->value = value;
                    reference->bindingContext = ctxt;
                    reference->bindingContext.owner++;
                    addBindingReference(reference);
                    value->type = Value::PropertyBinding;
                }
            } else  {
                COMPILE_CHECK(testLiteralAssignment(prop, value));
                value->type = Value::Literal;
            }
        }

        for (Value *v = prop->onValues.first(); v; v = Property::ValueList::next(v)) {
            Q_ASSERT(v->object);

            COMPILE_CHECK(buildPropertyOnAssignment(prop, obj, baseObj, v, ctxt)); 
        }

        obj->addValueProperty(prop);
    }

    compileState->objectDepth.pop();

    return true;
}

// Build assignments to QML lists.  QML lists are properties of type
// QQmlListProperty<T>.  List properties can accept a list of 
// objects, or a single binding.
bool QQmlCompiler::buildListProperty(QQmlScript::Property *prop,
                                             QQmlScript::Object *obj,
                                             const BindingContext &ctxt)
{
    Q_ASSERT(prop->core.isQList());

    compileState->listDepth.push();

    int t = prop->type;

    obj->addValueProperty(prop);

    int listType = enginePrivate->listType(t);
    bool listTypeIsInterface = QQmlMetaType::isInterface(listType);

    bool assignedBinding = false;
    for (Value *v = prop->values.first(); v; v = Property::ValueList::next(v)) {
        if (v->object) {
            v->type = Value::CreatedObject;
            COMPILE_CHECK(buildObject(v->object, ctxt));

            // We check object coercian here.  We check interface assignment
            // at runtime.
            if (!listTypeIsInterface) {
                if (!canCoerce(listType, v->object)) {
                    COMPILE_EXCEPTION(v, tr("Cannot assign object to list"));
                }
            }

        } else if (v->value.isScript()) {
            if (assignedBinding)
                COMPILE_EXCEPTION(v, tr("Can only assign one binding to lists"));

            assignedBinding = true;
            COMPILE_CHECK(buildBinding(v, prop, ctxt));
            v->type = Value::PropertyBinding;
        } else {
            COMPILE_EXCEPTION(v, tr("Cannot assign primitives to lists"));
        }
    }

    compileState->listDepth.pop();

    return true;
}

// Compiles an assignment to a QQmlScriptString property
bool QQmlCompiler::buildScriptStringProperty(QQmlScript::Property *prop,
                                            QQmlScript::Object *obj,
                                            const BindingContext &ctxt)
{
    if (prop->values.isMany())
        COMPILE_EXCEPTION(prop->values.first()->nextValue, tr( "Cannot assign multiple values to a script property"));

    if (prop->values.first()->object)
        COMPILE_EXCEPTION(prop->values.first(), tr( "Invalid property assignment: script expected"));

    prop->scriptStringScope = ctxt.stack;
    obj->addScriptStringProperty(prop);

    return true;
}

// Compile regular property assignments of the form "property: <value>"
bool QQmlCompiler::buildPropertyAssignment(QQmlScript::Property *prop,
                                          QQmlScript::Object *obj,
                                          const BindingContext &ctxt)
{
    obj->addValueProperty(prop);

    if (prop->values.isMany())
        COMPILE_EXCEPTION(prop->values.first(), tr( "Cannot assign multiple values to a singular property") );

    for (Value *v = prop->values.first(); v; v = Property::ValueList::next(v)) {
        if (v->object) {

            COMPILE_CHECK(buildPropertyObjectAssignment(prop, obj, v, ctxt));

        } else {

            COMPILE_CHECK(buildPropertyLiteralAssignment(prop, obj, v, ctxt));

        }
    }

    for (Value *v = prop->onValues.first(); v; v = Property::ValueList::next(v)) {
        Q_ASSERT(v->object);
        COMPILE_CHECK(buildPropertyOnAssignment(prop, obj, obj, v, ctxt));
    }

    return true;
}

// Compile assigning a single object instance to a regular property
bool QQmlCompiler::buildPropertyObjectAssignment(QQmlScript::Property *prop,
                                                         QQmlScript::Object *obj,
                                                         QQmlScript::Value *v,
                                                         const BindingContext &ctxt)
{
    Q_ASSERT(prop->index != -1);
    Q_ASSERT(v->object->type != -1);

    if (!prop->core.isWritable() && !prop->isReadOnlyDeclaration)
        COMPILE_EXCEPTION(v, tr("Invalid property assignment: \"%1\" is a read-only property").arg(prop->name().toString()));

    if (QQmlMetaType::isInterface(prop->type)) {

        // Assigning an object to an interface ptr property
        COMPILE_CHECK(buildObject(v->object, ctxt));

        v->type = Value::CreatedObject;

    } else if (prop->type == QMetaType::QVariant) {

        // Assigning an object to a QVariant
        COMPILE_CHECK(buildObject(v->object, ctxt));

        v->type = Value::CreatedObject;
    } else {
        // Normally buildObject() will set this up, but we need the static
        // meta object earlier to test for assignability.  It doesn't matter
        // that there may still be outstanding synthesized meta object changes
        // on this type, as they are not relevant for assignability testing
        v->object->metatype = output->types[v->object->type].createPropertyCache(engine);
        Q_ASSERT(v->object->metatype);

        // We want to raw metaObject here as the raw metaobject is the
        // actual property type before we applied any extensions that might
        // effect the properties on the type, but don't effect assignability
        QQmlPropertyCache *propertyMetaObject = enginePrivate->rawPropertyCacheForType(prop->type);

        // Will be true if the assgned type inherits propertyMetaObject
        bool isAssignable = false;
        // Determine isAssignable value
        if (propertyMetaObject) {
            QQmlPropertyCache *c = v->object->metatype;
            while (c && !isAssignable) {
                isAssignable |= c == propertyMetaObject;
                c = c->parent();
            }
        }

        if (isAssignable) {
            // Simple assignment
            COMPILE_CHECK(buildObject(v->object, ctxt));

            v->type = Value::CreatedObject;
        } else if (propertyMetaObject && propertyMetaObject->metaObject() == &QQmlComponent::staticMetaObject) {
            // Automatic "Component" insertion
            QQmlScript::Object *root = v->object;
            QQmlScript::Object *component = pool->New<Object>();
            component->type = componentTypeRef();
            component->metatype = enginePrivate->cache(&QQmlComponent::staticMetaObject);
            component->location = root->location;
            QQmlScript::Value *componentValue = pool->New<Value>();
            componentValue->object = root;
            component->getDefaultProperty()->addValue(componentValue);
            v->object = component;
            COMPILE_CHECK(buildPropertyObjectAssignment(prop, obj, v, ctxt));
        } else {
            COMPILE_EXCEPTION(v->object, tr("Cannot assign object to property"));
        }
    }

    return true;
}

// Compile assigning a single object instance to a regular property using the "on" syntax.
//
// For example:
//     Item {
//         NumberAnimation on x { }
//     }
bool QQmlCompiler::buildPropertyOnAssignment(QQmlScript::Property *prop,
                                                     QQmlScript::Object *obj,
                                                     QQmlScript::Object *baseObj,
                                                     QQmlScript::Value *v,
                                                     const BindingContext &ctxt)
{
    Q_ASSERT(prop->index != -1);
    Q_ASSERT(v->object->type != -1);

    Q_UNUSED(obj);

    if (!prop->core.isWritable())
        COMPILE_EXCEPTION(v, tr("Invalid property assignment: \"%1\" is a read-only property").arg(prop->name().toString()));


    // Normally buildObject() will set this up, but we need the static
    // meta object earlier to test for assignability.  It doesn't matter
    // that there may still be outstanding synthesized meta object changes
    // on this type, as they are not relevant for assignability testing
    v->object->metatype = output->types[v->object->type].createPropertyCache(engine);
    Q_ASSERT(v->object->metatype);

    // Will be true if the assigned type inherits QQmlPropertyValueSource
    bool isPropertyValue = false;
    // Will be true if the assigned type inherits QQmlPropertyValueInterceptor
    bool isPropertyInterceptor = false;
    if (QQmlType *valueType = toQmlType(v->object)) {
        isPropertyValue = valueType->propertyValueSourceCast() != -1;
        isPropertyInterceptor = valueType->propertyValueInterceptorCast() != -1;
    }

    if (isPropertyValue || isPropertyInterceptor) {
        // Assign as a property value source
        COMPILE_CHECK(buildObject(v->object, ctxt));

        if (isPropertyInterceptor && baseObj->synthdata.isEmpty())
            buildDynamicMeta(baseObj, ForceCreation);
        v->type = isPropertyValue ? Value::ValueSource : Value::ValueInterceptor;
    } else {
        COMPILE_EXCEPTION(v, tr("\"%1\" cannot operate on \"%2\"").arg(elementName(v->object)).arg(prop->name().toString()));
    }

    return true;
}

// Compile assigning a literal or binding to a regular property
bool QQmlCompiler::buildPropertyLiteralAssignment(QQmlScript::Property *prop,
                                                          QQmlScript::Object *obj,
                                                          QQmlScript::Value *v,
                                                          const BindingContext &ctxt)
{
    Q_ASSERT(prop->index != -1);

    if (v->value.isScript()) {

        //optimization for <Type>.<EnumValue> enum assignments
        if (prop->core.isEnum() || prop->core.propType == QMetaType::Int) {
            bool isEnumAssignment = false;
            COMPILE_CHECK(testQualifiedEnumAssignment(prop, obj, v, &isEnumAssignment));
            if (isEnumAssignment) {
                v->type = Value::Literal;
                return true;
            }
        }

        // Test for other binding optimizations
        if (!buildLiteralBinding(v, prop, ctxt))
            COMPILE_CHECK(buildBinding(v, prop, ctxt));

        v->type = Value::PropertyBinding;

    } else {

        COMPILE_CHECK(testLiteralAssignment(prop, v));

        v->type = Value::Literal;
    }

    return true;
}

struct StaticQtMetaObject : public QObject
{
    static const QMetaObject *get()
        { return &static_cast<StaticQtMetaObject*> (0)->staticQtMetaObject; }
};

bool QQmlCompiler::testQualifiedEnumAssignment(QQmlScript::Property *prop,
                                                       QQmlScript::Object *obj,
                                                       QQmlScript::Value *v,
                                                       bool *isAssignment)
{
    bool isIntProp = (prop->core.propType == QMetaType::Int) && !prop->core.isEnum();
    *isAssignment = false;
    if (!prop->core.isEnum() && !isIntProp)
        return true;

    QMetaProperty mprop = obj->metatype->firstCppMetaObject()->property(prop->index);

    if (!prop->core.isWritable() && !prop->isReadOnlyDeclaration)
        COMPILE_EXCEPTION(v, tr("Invalid property assignment: \"%1\" is a read-only property").arg(prop->name().toString()));

    QString string = v->value.asString();
    if (!string.at(0).isUpper())
        return true;

    int dot = string.indexOf(QLatin1Char('.'));
    if (dot == -1 || dot == string.length()-1)
        return true;

    if (string.indexOf(QLatin1Char('.'), dot+1) != -1)
        return true;

    QHashedStringRef typeName(string.constData(), dot);
    QString enumValue = string.mid(dot+1);

    if (isIntProp) {
        // Allow enum assignment to ints.
        bool ok;
        int enumval = evaluateEnum(typeName, enumValue.toUtf8(), &ok);
        if (ok) {
            v->type = Value::Literal;
            v->value = QQmlScript::Variant((double)enumval);
            *isAssignment = true;
        }
        return true;
    }

    QQmlType *type = 0;
    unit->imports().resolveType(typeName, &type, 0, 0, 0, 0);

    if (!type && typeName != QLatin1String("Qt"))
        return true;

    int value = 0;
    bool ok = false;

    if (type && toQmlType(obj) == type) {
        // When these two match, we can short cut the search
        if (mprop.isFlagType()) {
            value = mprop.enumerator().keysToValue(enumValue.toUtf8().constData(), &ok);
        } else {
            value = mprop.enumerator().keyToValue(enumValue.toUtf8().constData(), &ok);
        }
    } else {
        // Otherwise we have to search the whole type
        if (type) {
            value = type->enumValue(QHashedStringRef(enumValue), &ok);
        } else {
            QByteArray enumName = enumValue.toUtf8();
            const QMetaObject *metaObject = StaticQtMetaObject::get();
            for (int ii = metaObject->enumeratorCount() - 1; !ok && ii >= 0; --ii) {
                QMetaEnum e = metaObject->enumerator(ii);
                value = e.keyToValue(enumName.constData(), &ok);
            }
        }
    }

    if (!ok)
        return true;

    v->type = Value::Literal;
    v->value = QQmlScript::Variant((double)value);
    *isAssignment = true;

    return true;
}

// Similar logic to above, but not knowing target property.
int QQmlCompiler::evaluateEnum(const QHashedStringRef &scope, const QByteArray& enumValue, bool *ok) const
{
    Q_ASSERT_X(ok, "QQmlCompiler::evaluateEnum", "ok must not be a null pointer");
    *ok = false;

    if (scope != QLatin1String("Qt")) {
        QQmlType *type = 0;
        unit->imports().resolveType(scope, &type, 0, 0, 0, 0);
        return type ? type->enumValue(QHashedCStringRef(enumValue.constData(), enumValue.length()), ok) : -1;
    }

    const QMetaObject *mo = StaticQtMetaObject::get();
    int i = mo->enumeratorCount();
    while (i--) {
        int v = mo->enumerator(i).keyToValue(enumValue.constData(), ok);
        if (*ok)
            return v;
    }
    return -1;
}

const QMetaObject *QQmlCompiler::resolveType(const QString& name) const
{
    QQmlType *qmltype = 0;
    if (!unit->imports().resolveType(name, &qmltype, 0, 0, 0, 0))
        return 0;
    if (!qmltype)
        return 0;
    return qmltype->metaObject();
}

// similar to logic of completeComponentBuild, but also sticks data
// into primitives at the end
int QQmlCompiler::rewriteBinding(const QQmlScript::Variant& value, const QString& name)
{
    QQmlRewrite::RewriteBinding rewriteBinding;
    rewriteBinding.setName(QLatin1Char('$') + name.mid(name.lastIndexOf(QLatin1Char('.')) + 1));

    QString rewrite = rewriteBinding(value.asAST(), value.asScript(), 0);

    return output->indexForString(rewrite);
}

QString QQmlCompiler::rewriteSignalHandler(const QQmlScript::Variant& value, const QString &name)
{
    QQmlRewrite::RewriteSignalHandler rewriteSignalHandler;
    return rewriteSignalHandler(value.asAST(), value.asScript(), name);
}

// Ensures that the dynamic meta specification on obj is valid
bool QQmlCompiler::checkDynamicMeta(QQmlScript::Object *obj)
{
    bool seenDefaultProperty = false;

    // We use a coarse grain, 31 bit hash to check if there are duplicates.
    // Calculating the hash for the names is not a waste as we have to test
    // them against the illegalNames set anyway.
    QHashField propNames;
    QHashField methodNames;

    // Check properties
    for (Object::DynamicProperty *p = obj->dynamicProperties.first(); p; p = obj->dynamicProperties.next(p)) {
        const QQmlScript::Object::DynamicProperty &prop = *p;

        if (prop.isDefaultProperty) {
            if (seenDefaultProperty)
                COMPILE_EXCEPTION(&prop, tr("Duplicate default property"));
            seenDefaultProperty = true;
        }

        if (propNames.testAndSet(prop.name.hash())) {
            for (Object::DynamicProperty *p2 = obj->dynamicProperties.first(); p2 != p; 
                 p2 = obj->dynamicProperties.next(p2)) {
                if (p2->name == prop.name) {
                    COMPILE_EXCEPTION_LOCATION(prop.nameLocation.line,
                                               prop.nameLocation.column,
                                               tr("Duplicate property name"));
                }
            }
        }

        if (prop.name.at(0).isUpper()) {
            COMPILE_EXCEPTION_LOCATION(prop.nameLocation.line,
                                       prop.nameLocation.column,
                                       tr("Property names cannot begin with an upper case letter"));
        }

        if (enginePrivate->v8engine()->illegalNames().contains(prop.name)) {
            COMPILE_EXCEPTION_LOCATION(prop.nameLocation.line,
                                       prop.nameLocation.column,
                                       tr("Illegal property name"));
        }
    }

    for (Object::DynamicSignal *s = obj->dynamicSignals.first(); s; s = obj->dynamicSignals.next(s)) {
        const QQmlScript::Object::DynamicSignal &currSig = *s;

        if (methodNames.testAndSet(currSig.name.hash())) {
            for (Object::DynamicSignal *s2 = obj->dynamicSignals.first(); s2 != s;
                 s2 = obj->dynamicSignals.next(s2)) {
                if (s2->name == currSig.name)
                    COMPILE_EXCEPTION(&currSig, tr("Duplicate signal name"));
            }
        }

        if (currSig.name.at(0).isUpper())
            COMPILE_EXCEPTION(&currSig, tr("Signal names cannot begin with an upper case letter"));
        if (enginePrivate->v8engine()->illegalNames().contains(currSig.name))
            COMPILE_EXCEPTION(&currSig, tr("Illegal signal name"));
    }

    for (Object::DynamicSlot *s = obj->dynamicSlots.first(); s; s = obj->dynamicSlots.next(s)) {
        const QQmlScript::Object::DynamicSlot &currSlot = *s;

        if (methodNames.testAndSet(currSlot.name.hash())) {
            for (Object::DynamicSignal *s2 = obj->dynamicSignals.first(); s2;
                 s2 = obj->dynamicSignals.next(s2)) {
                if (s2->name == currSlot.name)
                    COMPILE_EXCEPTION(&currSlot, tr("Duplicate method name"));
            }
            for (Object::DynamicSlot *s2 = obj->dynamicSlots.first(); s2 != s;
                 s2 = obj->dynamicSlots.next(s2)) {
                if (s2->name == currSlot.name)
                    COMPILE_EXCEPTION(&currSlot, tr("Duplicate method name"));
            }
        }

        if (currSlot.name.at(0).isUpper())
            COMPILE_EXCEPTION(&currSlot, tr("Method names cannot begin with an upper case letter"));
        if (enginePrivate->v8engine()->illegalNames().contains(currSlot.name))
            COMPILE_EXCEPTION(&currSlot, tr("Illegal method name"));
    }

    return true;
}

bool QQmlCompiler::mergeDynamicMetaProperties(QQmlScript::Object *obj)
{
    for (Object::DynamicProperty *p = obj->dynamicProperties.first(); p;
         p = obj->dynamicProperties.next(p)) {

        if (!p->defaultValue || p->type == Object::DynamicProperty::Alias)
            continue;

        Property *property = 0;
        if (p->isDefaultProperty) {
            property = obj->getDefaultProperty();
        } else {
            property = obj->getProperty(p->name);
            if (!property->values.isEmpty()) 
                COMPILE_EXCEPTION(property, tr("Property value set multiple times"));
        }

        if (p->isReadOnly)
            property->isReadOnlyDeclaration = true;

        if (property->value)
            COMPILE_EXCEPTION(property, tr("Invalid property nesting"));

        property->values.append(p->defaultValue->values);
    }
    return true;
}

#include <private/qqmljsparser_p.h>

static QStringList astNodeToStringList(QQmlJS::AST::Node *node)
{
    if (node->kind == QQmlJS::AST::Node::Kind_IdentifierExpression) {
        QString name =
            static_cast<QQmlJS::AST::IdentifierExpression *>(node)->name.toString();
        return QStringList() << name;
    } else if (node->kind == QQmlJS::AST::Node::Kind_FieldMemberExpression) {
        QQmlJS::AST::FieldMemberExpression *expr = static_cast<QQmlJS::AST::FieldMemberExpression *>(node);

        QStringList rv = astNodeToStringList(expr->base);
        if (rv.isEmpty())
            return rv;
        rv.append(expr->name.toString());
        return rv;
    }
    return QStringList();
}

static QAtomicInt classIndexCounter(0);

bool QQmlCompiler::buildDynamicMeta(QQmlScript::Object *obj, DynamicMetaMode mode)
{
    Q_ASSERT(obj);
    Q_ASSERT(obj->metatype);

    if (mode != ForceCreation &&
        obj->dynamicProperties.isEmpty() &&
        obj->dynamicSignals.isEmpty() &&
        obj->dynamicSlots.isEmpty())
        return true;

    Q_ASSERT(obj->synthCache == 0);

    struct TypeData {
        Object::DynamicProperty::Type dtype;
        int metaType;
    } builtinTypes[] = {
        { Object::DynamicProperty::Var, QMetaType::QVariant },
        { Object::DynamicProperty::Variant, QMetaType::QVariant },
        { Object::DynamicProperty::Int, QMetaType::Int },
        { Object::DynamicProperty::Bool, QMetaType::Bool },
        { Object::DynamicProperty::Real, QMetaType::Double },
        { Object::DynamicProperty::String, QMetaType::QString },
        { Object::DynamicProperty::Url, QMetaType::QUrl },
        { Object::DynamicProperty::Color, QMetaType::QColor },
        { Object::DynamicProperty::Font, QMetaType::QFont },
        { Object::DynamicProperty::Time, QMetaType::QTime },
        { Object::DynamicProperty::Date, QMetaType::QDate },
        { Object::DynamicProperty::DateTime, QMetaType::QDateTime },
        { Object::DynamicProperty::Rect, QMetaType::QRectF },
        { Object::DynamicProperty::Point, QMetaType::QPointF },
        { Object::DynamicProperty::Size, QMetaType::QSizeF },
        { Object::DynamicProperty::Vector2D, QMetaType::QVector2D },
        { Object::DynamicProperty::Vector3D, QMetaType::QVector3D },
        { Object::DynamicProperty::Vector4D, QMetaType::QVector4D },
        { Object::DynamicProperty::Matrix4x4, QMetaType::QMatrix4x4 },
        { Object::DynamicProperty::Quaternion, QMetaType::QQuaternion }
    };
    static const int builtinTypeCount = sizeof(builtinTypes) / sizeof(TypeData);

    QByteArray newClassName;

    if (compileState->root == obj && !compileState->nested) {
        QString path = output->url.path();
        int lastSlash = path.lastIndexOf(QLatin1Char('/'));
        if (lastSlash > -1) {
            QString nameBase = path.mid(lastSlash + 1, path.length()-lastSlash-5);
            if (!nameBase.isEmpty() && nameBase.at(0).isUpper())
                newClassName = nameBase.toUtf8() + "_QMLTYPE_" +
                               QByteArray::number(classIndexCounter.fetchAndAddRelaxed(1));
        }
    }
    if (newClassName.isEmpty()) {
        newClassName = QQmlMetaObject(obj->metatype).className();
        newClassName.append("_QML_");
        newClassName.append(QByteArray::number(classIndexCounter.fetchAndAddRelaxed(1)));
    }
    QQmlPropertyCache *cache = obj->metatype->copyAndReserve(engine, obj->dynamicProperties.count(),
                                                             obj->dynamicProperties.count() +
                                                             obj->dynamicSignals.count() +
                                                             obj->dynamicSlots.count(),
                                                             obj->dynamicProperties.count() +
                                                             obj->dynamicSignals.count());

    cache->_dynamicClassName = newClassName;

    int cStringNameCount = 0;

    int aliasCount = 0;
    int varPropCount = 0;

    for (Object::DynamicProperty *p = obj->dynamicProperties.first(); p;
         p = obj->dynamicProperties.next(p)) {

        if (p->type == Object::DynamicProperty::Alias)
            aliasCount++;
        else if (p->type == Object::DynamicProperty::Var)
            varPropCount++;

        if (p->name.isLatin1()) {
            p->nameIndex = cStringNameCount;
            cStringNameCount += p->name.length() + 7 /* strlen("Changed") */;
        }

        // No point doing this for both the alias and non alias cases
        QQmlPropertyData *d = property(obj, p->name);
        if (d && d->isFinal())
            COMPILE_EXCEPTION(p, tr("Cannot override FINAL property"));
    }

    for (Object::DynamicSignal *s = obj->dynamicSignals.first(); s; s = obj->dynamicSignals.next(s)) {
        if (s->name.isLatin1()) {
            s->nameIndex = cStringNameCount;
            cStringNameCount += s->name.length();
        }
    }

    for (Object::DynamicSlot *s = obj->dynamicSlots.first(); s; s = obj->dynamicSlots.next(s)) {
        if (s->name.isLatin1()) {
            s->nameIndex = cStringNameCount;
            cStringNameCount += s->name.length();
        }
    }

    char *cStringData = 0;
    if (cStringNameCount) {
        cache->_dynamicStringData.resize(cStringNameCount);
        cStringData = cache->_dynamicStringData.data();

        for (Object::DynamicProperty *p = obj->dynamicProperties.first(); p;
             p = obj->dynamicProperties.next(p)) {

            if (p->nameIndex == -1) continue;

            char *myData = cStringData + p->nameIndex;
            for (int ii = 0; ii < p->name.length(); ++ii)
                *myData++ = p->name.at(ii).unicode();
            *myData++ = 'C'; *myData++ = 'h'; *myData++ = 'a'; *myData++ = 'n';
            *myData++ = 'g'; *myData++ = 'e'; *myData++ = 'd';
        }

        for (Object::DynamicSlot *s = obj->dynamicSlots.first(); s; s = obj->dynamicSlots.next(s)) {

            if (s->nameIndex == -1) continue;

            char *myData = cStringData + s->nameIndex;
            for (int ii = 0; ii < s->name.length(); ++ii)
                *myData++ = s->name.at(ii).unicode();
        }

        for (Object::DynamicSignal *s = obj->dynamicSignals.first(); s;
             s = obj->dynamicSignals.next(s)) {

            if (s->nameIndex == -1) continue;

            char *myData = cStringData + s->nameIndex;
            for (int ii = 0; ii < s->name.length(); ++ii)
                *myData++ = s->name.at(ii).unicode();
        }
    }

    QByteArray dynamicData;
    typedef QQmlVMEMetaData VMD;

    dynamicData = QByteArray(sizeof(QQmlVMEMetaData) +
                             obj->dynamicProperties.count() * sizeof(VMD::PropertyData) +
                             obj->dynamicSlots.count() * sizeof(VMD::MethodData) +
                             aliasCount * sizeof(VMD::AliasData), 0);

    int effectivePropertyIndex = cache->propertyIndexCacheStart;
    int effectiveMethodIndex = cache->methodIndexCacheStart;

    // For property change signal override detection.
    // We prepopulate a set of signal names which already exist in the object,
    // and throw an error if there is a signal/method defined as an override.
    QSet<QString> seenSignals;
    seenSignals << QStringLiteral("destroyed") << QStringLiteral("parentChanged") << QStringLiteral("objectNameChanged");
    QQmlPropertyCache *parentCache = cache;
    while ((parentCache = parentCache->parent())) {
        if (int pSigCount = parentCache->signalCount()) {
            int pSigOffset = parentCache->signalOffset();
            for (int i = pSigOffset; i < pSigCount; ++i) {
                QQmlPropertyData *currPSig = parentCache->signal(i);
                // XXX TODO: find a better way to get signal name from the property data :-/
                for (QQmlPropertyCache::StringCache::ConstIterator iter = parentCache->stringCache.begin();
                        iter != parentCache->stringCache.end(); ++iter) {
                    if (currPSig == (*iter).second) {
                        seenSignals.insert(iter.key());
                        break;
                    }
                }
            }
        }
    }

    // First set up notify signals for properties - first normal, then var, then alias
    enum { NSS_Normal = 0, NSS_Var = 1, NSS_Alias = 2 };
    for (int ii = NSS_Normal; ii <= NSS_Alias; ++ii) { // 0 == normal, 1 == var, 2 == alias

        if (ii == NSS_Var && varPropCount == 0) continue;
        else if (ii == NSS_Alias && aliasCount == 0) continue;

        for (Object::DynamicProperty *p = obj->dynamicProperties.first(); p;
             p = obj->dynamicProperties.next(p)) {

            if ((ii == NSS_Normal && (p->type == Object::DynamicProperty::Alias ||
                                      p->type == Object::DynamicProperty::Var)) ||
                ((ii == NSS_Var) && (p->type != Object::DynamicProperty::Var)) ||
                ((ii == NSS_Alias) && (p->type != Object::DynamicProperty::Alias)))
                continue;

            quint32 flags = QQmlPropertyData::IsSignal | QQmlPropertyData::IsFunction |
                            QQmlPropertyData::IsVMESignal;

            QString changedSigName = p->name.toString() + QLatin1String("Changed");
            seenSignals.insert(changedSigName);

            if (p->nameIndex != -1) {
                QHashedCStringRef changedSignalName(cStringData + p->nameIndex,
                                                    p->name.length() + 7 /* strlen("Changed") */);
                cache->appendSignal(changedSignalName, flags, effectiveMethodIndex++);
            } else {
                cache->appendSignal(changedSigName, flags, effectiveMethodIndex++);
            }
        }
    }

    // Dynamic signals
    for (Object::DynamicSignal *s = obj->dynamicSignals.first(); s; s = obj->dynamicSignals.next(s)) {
        int paramCount = s->parameterNames.count();

        QList<QByteArray> names;
        QVarLengthArray<int, 10> paramTypes(paramCount?(paramCount + 1):0);

        if (paramCount) {
            paramTypes[0] = paramCount;

            for (int i = 0; i < paramCount; ++i) {
                if (s->parameterTypes.at(i) < builtinTypeCount) {
                    // built-in type
                    paramTypes[i + 1] = builtinTypes[s->parameterTypes.at(i)].metaType;
                    names.append(s->parameterNames.at(i).toString().toUtf8());
                } else {
                    // lazily resolved type
                    Q_ASSERT(s->parameterTypes.at(i) == Object::DynamicProperty::Custom);
                    QQmlType *qmltype = 0;
                    QString url;
                    if (!unit->imports().resolveType(s->parameterTypeNames.at(i).toString(), &qmltype, &url, 0, 0, 0))
                        COMPILE_EXCEPTION(s, tr("Invalid signal parameter type: %1").arg(s->parameterTypeNames.at(i).toString()));

                    if (!qmltype) {
                        QQmlTypeData *tdata = enginePrivate->typeLoader.getType(QUrl(url));
                        Q_ASSERT(tdata);
                        Q_ASSERT(tdata->isComplete());

                        QQmlCompiledData *data = tdata->compiledData();

                        paramTypes[i + 1] = data->metaTypeId;

                        tdata->release();
                    } else {
                        paramTypes[i + 1] = qmltype->typeId();
                    }
                    names.append(s->parameterNames.at(i).toString().toUtf8());
                }
            }
        }

        ((QQmlVMEMetaData *)dynamicData.data())->signalCount++;

        quint32 flags = QQmlPropertyData::IsSignal | QQmlPropertyData::IsFunction |
                        QQmlPropertyData::IsVMESignal;
        if (paramCount)
            flags |= QQmlPropertyData::HasArguments;

        QString signalName = s->name.toString();
        if (seenSignals.contains(signalName)) {
            const QQmlScript::Object::DynamicSignal &currSig = *s;
            COMPILE_EXCEPTION(&currSig, tr("Duplicate signal name: invalid override of property change signal or superclass signal"));
        }
        seenSignals.insert(signalName);

        if (s->nameIndex != -1) {
            QHashedCStringRef name(cStringData + s->nameIndex, s->name.length(), s->name.hash());
            cache->appendSignal(name, flags, effectiveMethodIndex++,
                                paramCount?paramTypes.constData():0, names);
        } else {
            cache->appendSignal(signalName, flags, effectiveMethodIndex++,
                                paramCount?paramTypes.constData():0, names);
        }
    }


    // Dynamic slots
    for (Object::DynamicSlot *s = obj->dynamicSlots.first(); s; s = obj->dynamicSlots.next(s)) {
        int paramCount = s->parameterNames.count();

        quint32 flags = QQmlPropertyData::IsFunction | QQmlPropertyData::IsVMEFunction;

        if (paramCount)
            flags |= QQmlPropertyData::HasArguments;

        QString slotName = s->name.toString();
        if (seenSignals.contains(slotName)) {
            const QQmlScript::Object::DynamicSlot &currSlot = *s;
            COMPILE_EXCEPTION(&currSlot, tr("Duplicate method name: invalid override of property change signal or superclass signal"));
        }
        // Note: we don't append slotName to the seenSignals list, since we don't
        // protect against overriding change signals or methods with properties.

        if (s->nameIndex != -1) {
            QHashedCStringRef name(cStringData + s->nameIndex, s->name.length(), s->name.hash());
            cache->appendMethod(name, flags, effectiveMethodIndex++, s->parameterNames);
        } else {
            cache->appendMethod(slotName, flags, effectiveMethodIndex++, s->parameterNames);
        }
    }


    // Dynamic properties (except var and aliases)
    int effectiveSignalIndex = cache->signalHandlerIndexCacheStart;
    for (Object::DynamicProperty *p = obj->dynamicProperties.first(); p;
         p = obj->dynamicProperties.next(p)) {

        if (p->type == Object::DynamicProperty::Alias ||
            p->type == Object::DynamicProperty::Var)
            continue;

        int propertyType = 0;
        int vmePropertyType = 0;
        quint32 propertyFlags = 0;

        if (p->type < builtinTypeCount) {
            propertyType = builtinTypes[p->type].metaType;
            vmePropertyType = propertyType;

            if (p->type == Object::DynamicProperty::Variant)
                propertyFlags |= QQmlPropertyData::IsQVariant;
        } else {
            Q_ASSERT(p->type == Object::DynamicProperty::CustomList ||
                     p->type == Object::DynamicProperty::Custom);

            QQmlType *qmltype = 0;
            QString url;
            if (!unit->imports().resolveType(p->customType.toString(), &qmltype, &url, 0, 0, 0))
                COMPILE_EXCEPTION(p, tr("Invalid property type"));

            if (!qmltype) {
                QQmlTypeData *tdata = enginePrivate->typeLoader.getType(QUrl(url));
                Q_ASSERT(tdata);
                Q_ASSERT(tdata->isComplete());

                QQmlCompiledData *data = tdata->compiledData();

                if (p->type == Object::DynamicProperty::Custom) {
                    propertyType = data->metaTypeId;
                    vmePropertyType = QMetaType::QObjectStar;
                } else {
                    propertyType = data->listMetaTypeId;
                    vmePropertyType = qMetaTypeId<QQmlListProperty<QObject> >();
                }

                tdata->release();
            } else {
                if (p->type == Object::DynamicProperty::Custom) {
                    propertyType = qmltype->typeId();
                    vmePropertyType = QMetaType::QObjectStar;
                } else {
                    propertyType = qmltype->qListTypeId();
                    vmePropertyType = qMetaTypeId<QQmlListProperty<QObject> >();
                }
            }

            if (p->type == Object::DynamicProperty::Custom)
                propertyFlags |= QQmlPropertyData::IsQObjectDerived;
            else
                propertyFlags |= QQmlPropertyData::IsQList;
        }

        if (!p->isReadOnly && p->type != Object::DynamicProperty::CustomList)
            propertyFlags |= QQmlPropertyData::IsWritable;

        if (p->nameIndex != -1) {
            QHashedCStringRef propertyName(cStringData + p->nameIndex, p->name.length(),
                                           p->name.hash());
            if (p->isDefaultProperty) cache->_defaultPropertyName = propertyName.toUtf16();
            cache->appendProperty(propertyName, propertyFlags, effectivePropertyIndex++,
                                  propertyType, effectiveSignalIndex);
        } else {
            QString propertyName = p->name.toString();
            if (p->isDefaultProperty) cache->_defaultPropertyName = propertyName;
            cache->appendProperty(propertyName, propertyFlags, effectivePropertyIndex++,
                                  propertyType, effectiveSignalIndex);
        }

        effectiveSignalIndex++;

        VMD *vmd = (QQmlVMEMetaData *)dynamicData.data();
        (vmd->propertyData() + vmd->propertyCount)->propertyType = vmePropertyType;
        vmd->propertyCount++;
    }

    // Now do var properties
    for (Object::DynamicProperty *p = obj->dynamicProperties.first(); p && varPropCount;
         p = obj->dynamicProperties.next(p)) {

        if (p->type != Object::DynamicProperty::Var)
            continue;

        quint32 propertyFlags = QQmlPropertyData::IsVarProperty;
        if (!p->isReadOnly)
            propertyFlags |= QQmlPropertyData::IsWritable;

        VMD *vmd = (QQmlVMEMetaData *)dynamicData.data();
        (vmd->propertyData() + vmd->propertyCount)->propertyType = QMetaType::QVariant;
        vmd->propertyCount++;
        ((QQmlVMEMetaData *)dynamicData.data())->varPropertyCount++;

        if (p->nameIndex != -1) {
            QHashedCStringRef propertyName(cStringData + p->nameIndex, p->name.length(),
                                           p->name.hash());
            if (p->isDefaultProperty) cache->_defaultPropertyName = propertyName.toUtf16();
            cache->appendProperty(propertyName, propertyFlags, effectivePropertyIndex++,
                                  QMetaType::QVariant, effectiveSignalIndex);
        } else {
            QString propertyName = p->name.toString();
            if (p->isDefaultProperty) cache->_defaultPropertyName = propertyName;
            cache->appendProperty(propertyName, propertyFlags, effectivePropertyIndex++,
                                  QMetaType::QVariant, effectiveSignalIndex);
        }

        effectiveSignalIndex++;
    }

    // Alias property count.  Actual data is setup in buildDynamicMetaAliases
    ((QQmlVMEMetaData *)dynamicData.data())->aliasCount = aliasCount;

    // Dynamic slot data - comes after the property data
    for (Object::DynamicSlot *s = obj->dynamicSlots.first(); s; s = obj->dynamicSlots.next(s)) {
        int paramCount = s->parameterNames.count();

        QString funcScript;
        int namesSize = 0;
        if (paramCount) namesSize += s->parameterNamesLength() + (paramCount - 1 /* commas */);
        funcScript.reserve(strlen("(function ") + s->name.length() + 1 /* lparen */ +
                           namesSize + 1 /* rparen */ + s->body.length() + 1 /* rparen */);
        funcScript = QLatin1String("(function ") + s->name.toString() + QLatin1Char('(');
        for (int jj = 0; jj < paramCount; ++jj) {
            if (jj) funcScript.append(QLatin1Char(','));
            funcScript.append(QLatin1String(s->parameterNames.at(jj)));
        }
        funcScript += QLatin1Char(')') + s->body + QLatin1Char(')');

        QByteArray utf8 = funcScript.toUtf8();
        VMD::MethodData methodData = { s->parameterNames.count(),
                                       dynamicData.size(),
                                       utf8.length(),
                                       s->location.start.line };

        VMD *vmd = (QQmlVMEMetaData *)dynamicData.data();
        VMD::MethodData &md = *(vmd->methodData() + vmd->methodCount);
        vmd->methodCount++;
        md = methodData;

        dynamicData.append((const char *)utf8.constData(), utf8.length());
    }

    if (aliasCount)
        compileState->aliasingObjects.append(obj);

    obj->synthdata = dynamicData;
    obj->synthCache = cache;
    obj->metatype = cache;

    return true;
}

bool QQmlCompiler::buildDynamicMetaAliases(QQmlScript::Object *obj)
{
    Q_ASSERT(obj->synthCache);

    QByteArray &dynamicData = obj->synthdata;

    QQmlPropertyCache *cache = obj->synthCache;
    char *cStringData = cache->_dynamicStringData.data();

    int effectiveSignalIndex = cache->signalHandlerIndexCacheStart + cache->propertyIndexCache.count();
    int effectivePropertyIndex = cache->propertyIndexCacheStart + cache->propertyIndexCache.count();
    int effectiveAliasIndex = 0;

    for (Object::DynamicProperty *p = obj->dynamicProperties.first(); p;
         p = obj->dynamicProperties.next(p)) {

        if (p->type != Object::DynamicProperty::Alias)
            continue;

        if (!p->defaultValue)
            COMPILE_EXCEPTION(obj, tr("No property alias location"));

        if (!p->defaultValue->values.isOne() ||
            p->defaultValue->values.first()->object ||
            !p->defaultValue->values.first()->value.isScript())
            COMPILE_EXCEPTION(p->defaultValue, tr("Invalid alias location"));

        QQmlJS::AST::Node *node = p->defaultValue->values.first()->value.asAST();
        Q_ASSERT(node);

        QStringList alias = astNodeToStringList(node);
        if (alias.count() < 1 || alias.count() > 3)
            COMPILE_EXCEPTION(p->defaultValue, tr("Invalid alias reference. An alias reference must be specified as <id>, <id>.<property> or <id>.<value property>.<property>"));

        QQmlScript::Object *idObject = compileState->ids.value(alias.at(0));
        if (!idObject)
            COMPILE_EXCEPTION(p->defaultValue, tr("Invalid alias reference. Unable to find id \"%1\"").arg(alias.at(0)));

        int propIdx = -1;
        int propType = 0;
        int notifySignal = -1;
        int flags = 0;
        int type = 0;
        bool writable = false;
        bool resettable = false;

        quint32 propertyFlags = QQmlPropertyData::IsAlias;

        if (alias.count() == 2 || alias.count() == 3) {
            QQmlPropertyData *property = this->property(idObject, alias.at(1));

            if (!property || property->coreIndex > 0x0000FFFF)
                COMPILE_EXCEPTION(p->defaultValue, tr("Invalid alias location"));

            propIdx = property->coreIndex;
            type = property->propType;

            writable = property->isWritable();
            resettable = property->isResettable();
            notifySignal = property->notifyIndex;

            if (alias.count() == 3) {
                QQmlValueType *valueType = QQmlValueTypeFactory::valueType(type);
                if (!valueType)
                    COMPILE_EXCEPTION(p->defaultValue, tr("Invalid alias location"));

                propType = type;

                int valueTypeIndex =
                    valueType->metaObject()->indexOfProperty(alias.at(2).toUtf8().constData());
                if (valueTypeIndex == -1)
                    COMPILE_EXCEPTION(p->defaultValue, tr("Invalid alias location"));
                Q_ASSERT(valueTypeIndex <= 0x0000FFFF);

                propIdx |= (valueTypeIndex << 16);
                if (valueType->metaObject()->property(valueTypeIndex).isEnumType())
                    type = QVariant::Int;
                else
                    type = valueType->metaObject()->property(valueTypeIndex).userType();

            } else {
                if (property->isEnum()) {
                    type = QVariant::Int;
                } else {
                    // Copy type flags
                    propertyFlags |= property->getFlags() & QQmlPropertyData::PropTypeFlagMask;

                    if (property->isVarProperty())
                        propertyFlags |= QQmlPropertyData::IsQVariant;

                    if (property->isQObject())
                        flags |= QML_ALIAS_FLAG_PTR;
                }
            }
        } else {
            Q_ASSERT(idObject->type != -1); // How else did it get an id?

            const QQmlCompiledData::TypeReference &ref = output->types.at(idObject->type);
            if (ref.type)
                type = ref.type->typeId();
            else
                type = ref.component->metaTypeId;

            flags |= QML_ALIAS_FLAG_PTR;
            propertyFlags |= QQmlPropertyData::IsQObjectDerived;
        }

        QQmlVMEMetaData::AliasData aliasData = { idObject->idIndex, propIdx, propType, flags, notifySignal };

        typedef QQmlVMEMetaData VMD;
        VMD *vmd = (QQmlVMEMetaData *)dynamicData.data();
        *(vmd->aliasData() + effectiveAliasIndex++) = aliasData;

        if (!p->isReadOnly && writable)
            propertyFlags |= QQmlPropertyData::IsWritable;
        else
            propertyFlags &= ~QQmlPropertyData::IsWritable;

        if (resettable)
            propertyFlags |= QQmlPropertyData::IsResettable;
        else
            propertyFlags &= ~QQmlPropertyData::IsResettable;

        if (p->nameIndex != -1) {
            QHashedCStringRef propertyName(cStringData + p->nameIndex, p->name.length(),
                                           p->name.hash());
            if (p->isDefaultProperty) cache->_defaultPropertyName = propertyName.toUtf16();
            cache->appendProperty(propertyName, propertyFlags, effectivePropertyIndex++,
                                  type, effectiveSignalIndex++);
        } else {
            QString propertyName = p->name.toString();
            if (p->isDefaultProperty) cache->_defaultPropertyName = propertyName;
            cache->appendProperty(propertyName, propertyFlags, effectivePropertyIndex++,
                                  type, effectiveSignalIndex++);
        }
    }

    return true;
}

bool QQmlCompiler::checkValidId(QQmlScript::Value *v, const QString &val)
{
    if (val.isEmpty())
        COMPILE_EXCEPTION(v, tr( "Invalid empty ID"));

    QChar ch = val.at(0);
    if (ch.isLetter() && !ch.isLower())
        COMPILE_EXCEPTION(v, tr( "IDs cannot start with an uppercase letter"));

    QChar u(QLatin1Char('_'));
    if (!ch.isLetter() && ch != u)
        COMPILE_EXCEPTION(v, tr( "IDs must start with a letter or underscore"));

    for (int ii = 1; ii < val.count(); ++ii) {
        ch = val.at(ii);
        if (!ch.isLetterOrNumber() && ch != u)
            COMPILE_EXCEPTION(v, tr( "IDs must contain only letters, numbers, and underscores"));
    }

    if (enginePrivate->v8engine()->illegalNames().contains(val))
        COMPILE_EXCEPTION(v, tr( "ID illegally masks global JavaScript property"));

    return true;
}

bool QQmlCompiler::buildBinding(QQmlScript::Value *value,
                                        QQmlScript::Property *prop,
                                        const BindingContext &ctxt)
{
    Q_ASSERT(prop->index != -1);
    Q_ASSERT(prop->parent);
    Q_ASSERT(prop->parent->metatype);

    if (!prop->core.isWritable() && !prop->core.isQList() && !prop->isReadOnlyDeclaration)
        COMPILE_EXCEPTION(prop, tr("Invalid property assignment: \"%1\" is a read-only property").arg(prop->name().toString()));

    JSBindingReference *reference = pool->New<JSBindingReference>();
    reference->expression = value->value;
    reference->property = prop;
    reference->value = value;
    reference->bindingContext = ctxt;
    addBindingReference(reference);

    return true;
}

bool QQmlCompiler::buildLiteralBinding(QQmlScript::Value *v,
                                               QQmlScript::Property *prop,
                                               const QQmlCompilerTypes::BindingContext &)
{
    Q_ASSERT(v->value.isScript());

    if (!prop->core.isWritable())
        return false;

    AST::Node *binding = v->value.asAST();

    if (prop->type == QVariant::String) {
        if (AST::CallExpression *e = AST::cast<AST::CallExpression *>(binding)) {
            if (AST::IdentifierExpression *i = AST::cast<AST::IdentifierExpression *>(e->base)) {
                if (i->name == qsTrId_string) {
                    AST::ArgumentList *arg1 = e->arguments?e->arguments:0;
                    AST::ArgumentList *arg2 = arg1?arg1->next:0;

                    if (arg1 && arg1->expression->kind == AST::Node::Kind_StringLiteral &&
                        (!arg2 || arg2->expression->kind == AST::Node::Kind_NumericLiteral) &&
                        (!arg2 || !arg2->next)) {

                        QStringRef text;
                        int n = -1;

                        text = AST::cast<AST::StringLiteral *>(arg1->expression)->value;
                        if (arg2) n = (int)AST::cast<AST::NumericLiteral *>(arg2->expression)->value;

                        TrBindingReference *reference = pool->New<TrBindingReference>();
                        reference->dataType = BindingReference::TrId;
                        reference->text = text;
                        reference->n = n;
                        v->bindingReference = reference;
                        return true;
                    }

                } else if (i->name == qsTr_string) {

                    AST::ArgumentList *arg1 = e->arguments?e->arguments:0;
                    AST::ArgumentList *arg2 = arg1?arg1->next:0;
                    AST::ArgumentList *arg3 = arg2?arg2->next:0;

                    if (arg1 && arg1->expression->kind == AST::Node::Kind_StringLiteral &&
                        (!arg2 || arg2->expression->kind == AST::Node::Kind_StringLiteral) &&
                        (!arg3 || arg3->expression->kind == AST::Node::Kind_NumericLiteral) &&
                        (!arg3 || !arg3->next)) {

                        QStringRef text;
                        QStringRef comment;
                        int n = -1;

                        text = AST::cast<AST::StringLiteral *>(arg1->expression)->value;
                        if (arg2) comment = AST::cast<AST::StringLiteral *>(arg2->expression)->value;
                        if (arg3) n = (int)AST::cast<AST::NumericLiteral *>(arg3->expression)->value;

                        TrBindingReference *reference = pool->New<TrBindingReference>();
                        reference->dataType = BindingReference::Tr;
                        reference->text = text;
                        reference->comment = comment;
                        reference->n = n;
                        v->bindingReference = reference;
                        return true;
                    }

                }
            }
        }

    }

    return false;
}

void QQmlCompiler::genBindingAssignment(QQmlScript::Value *binding,
                                                QQmlScript::Property *prop,
                                                QQmlScript::Object *obj,
                                                QQmlScript::Property *valueTypeProperty)
{
    Q_UNUSED(obj);
    Q_ASSERT(binding->bindingReference);

    const BindingReference &ref = *binding->bindingReference;
#ifndef QT_NO_TRANSLATION
    if (ref.dataType == BindingReference::TrId) {
        const TrBindingReference &tr = static_cast<const TrBindingReference &>(ref);

        Instruction::StoreTrIdString store;
        store.propertyIndex = prop->core.coreIndex;
        store.text = output->indexForByteArray(tr.text.toUtf8());
        store.n = tr.n;
        output->addInstruction(store);
    } else if (ref.dataType == BindingReference::Tr) {
        const TrBindingReference &tr = static_cast<const TrBindingReference &>(ref);

        Instruction::StoreTrString store;
        store.propertyIndex = prop->core.coreIndex;
        store.context = translationContextIndex();
        store.text = output->indexForByteArray(tr.text.toUtf8());
        store.comment = output->indexForByteArray(tr.comment.toUtf8());
        store.n = tr.n;
        output->addInstruction(store);
    } else
#endif
    if (ref.dataType == BindingReference::V4) {
        const JSBindingReference &js = static_cast<const JSBindingReference &>(ref);

        Instruction::StoreV4Binding store;
        store.value = js.compiledIndex;
        store.fallbackValue = js.sharedIndex;
        store.context = js.bindingContext.stack;
        store.owner = js.bindingContext.owner;
        store.isAlias = prop->isAlias;
        if (valueTypeProperty) {
            store.property = ((prop->index << 16) | valueTypeProperty->index);
            store.propType = valueTypeProperty->type;
            store.isRoot = (compileState->root == valueTypeProperty->parent);
        } else {
            store.property = prop->index;
            store.propType = 0;
            store.isRoot = (compileState->root == obj);
        }
        store.line = binding->location.start.line;
        store.column = binding->location.start.column;
        output->addInstruction(store);

        if (store.fallbackValue > -1) {
            //also create v8 instruction (needed to properly configure the fallback v8 binding)
            JSBindingReference &js = static_cast<JSBindingReference &>(*binding->bindingReference);
            js.dataType = BindingReference::V8;
            genBindingAssignment(binding, prop, obj, valueTypeProperty);
        }
    } else if (ref.dataType == BindingReference::V8) {
        const JSBindingReference &js = static_cast<const JSBindingReference &>(ref);

        Instruction::StoreV8Binding store;
        store.value = js.sharedIndex;
        store.context = js.bindingContext.stack;
        store.owner = js.bindingContext.owner;
        store.isAlias = prop->isAlias;
        store.isSafe = js.isSafe;
        if (valueTypeProperty) {
            store.isRoot = (compileState->root == valueTypeProperty->parent);
        } else {
            store.isRoot = (compileState->root == obj);
        }
        store.isFallback = js.compiledIndex > -1;
        store.line = binding->location.start.line;
        store.column = binding->location.start.column;

        Q_ASSERT(js.bindingContext.owner == 0 ||
                 (js.bindingContext.owner != 0 && valueTypeProperty));
        if (js.bindingContext.owner) {
            store.property = genValueTypeData(prop, valueTypeProperty);
        } else {
            store.property = prop->core;
        }

        output->addInstruction(store);
    } else if (ref.dataType == BindingReference::QtScript) {
        const JSBindingReference &js = static_cast<const JSBindingReference &>(ref);

        Instruction::StoreBinding store;
        store.value = output->indexForString(js.rewrittenExpression);
        store.context = js.bindingContext.stack;
        store.owner = js.bindingContext.owner;
        store.line = binding->location.start.line;
        store.column = binding->location.start.column;
        store.isAlias = prop->isAlias;

        if (valueTypeProperty) {
            store.isRoot = (compileState->root == valueTypeProperty->parent);
        } else {
            store.isRoot = (compileState->root == obj);
        }
        store.isFallback = false;

        Q_ASSERT(js.bindingContext.owner == 0 ||
                 (js.bindingContext.owner != 0 && valueTypeProperty));
        if (js.bindingContext.owner) {
            store.property = genValueTypeData(prop, valueTypeProperty);
        } else {
            store.property = prop->core;
        }

        output->addInstruction(store);
    } else {
        Q_ASSERT(!"Unhandled BindingReference::DataType type");
    }
}

int QQmlCompiler::genContextCache()
{
    if (compileState->ids.count() == 0)
        return -1;

    QQmlIntegerCache *cache = new QQmlIntegerCache();
    cache->reserve(compileState->ids.count());
    for (Object *o = compileState->ids.first(); o; o = compileState->ids.next(o)) 
        cache->add(o->id, o->idIndex);

    output->contextCaches.append(cache);
    return output->contextCaches.count() - 1;
}

QQmlPropertyData
QQmlCompiler::genValueTypeData(QQmlScript::Property *valueTypeProp, 
                                       QQmlScript::Property *prop)
{
    QQmlValueType *vt = QQmlValueTypeFactory::valueType(prop->type);
    Q_ASSERT(vt);
    return QQmlPropertyPrivate::saveValueType(prop->core, vt->metaObject(), valueTypeProp->index, engine);
}

bool QQmlCompiler::completeComponentBuild()
{
    if (componentStats)
        componentStats->componentStat.ids = compileState->ids.count();

    for (Object *aliasObject = compileState->aliasingObjects.first(); aliasObject; 
         aliasObject = compileState->aliasingObjects.next(aliasObject)) 
        COMPILE_CHECK(buildDynamicMetaAliases(aliasObject));

    QV4Compiler::Expression expr(unit->imports());
    expr.component = compileState->root;
    expr.ids = &compileState->ids;
    expr.importCache = output->importCache;

    QV4Compiler bindingCompiler;

    QList<JSBindingReference*> sharedBindings;

    for (JSBindingReference *b = compileState->bindings.first(); b; b = b->nextReference) {

        JSBindingReference &binding = *b;

        // First try v4
        expr.context = binding.bindingContext.object;
        expr.property = binding.property;
        expr.expression = binding.expression;

        bool needsFallback = false;
        int index = bindingCompiler.compile(expr, enginePrivate, &needsFallback);
        if (index != -1) {
            binding.dataType = BindingReference::V4;
            binding.compiledIndex = index;
            binding.sharedIndex = -1;
            if (componentStats)
                componentStats->componentStat.optimizedBindings.append(b->value->location);

            if (!needsFallback)
                continue;

            // Drop through. We need to create a V8 binding in case the V4 binding is invalidated
        }

        // Pre-rewrite the expression
        QString expression = binding.expression.asScript();

        QQmlRewrite::RewriteBinding rewriteBinding;
        rewriteBinding.setName(QLatin1Char('$')+binding.property->name().toString());
        bool isSharable = false;
        bool isSafe = false;
        binding.rewrittenExpression = rewriteBinding(binding.expression.asAST(), expression, &isSharable, &isSafe);
        binding.isSafe = isSafe;

        if (isSharable && binding.property->type != qMetaTypeId<QQmlBinding*>()) {
            sharedBindings.append(b);

            if (!needsFallback) {
                binding.dataType = BindingReference::V8;
                binding.compiledIndex = -1;

                if (componentStats)
                    componentStats->componentStat.sharedBindings.append(b->value->location);
            }
        } else {
            Q_ASSERT(!needsFallback);
            binding.dataType = BindingReference::QtScript;

            if (componentStats)
                componentStats->componentStat.scriptBindings.append(b->value->location);
        }
    }

    if (!sharedBindings.isEmpty()) {
        struct Sort {
            static bool lt(const JSBindingReference *lhs, const JSBindingReference *rhs)
            {
                return lhs->value->location.start.line < rhs->value->location.start.line;
            }
        };

        qSort(sharedBindings.begin(), sharedBindings.end(), Sort::lt);

        int startLineNumber = sharedBindings.at(0)->value->location.start.line;
        int lineNumber = startLineNumber;

        QByteArray functionArray("[", 1);
        for (int ii = 0; ii < sharedBindings.count(); ++ii) {

            JSBindingReference *reference = sharedBindings.at(ii);
            QQmlScript::Value *value = reference->value;
            const QString &expression = reference->rewrittenExpression;

            if (ii != 0) functionArray.append(",", 1);

            while (lineNumber < value->location.start.line) {
                lineNumber++;
                functionArray.append("\n", 1);
            }

            functionArray += expression.toUtf8();
            lineNumber += expression.count(QLatin1Char('\n'));

            reference->sharedIndex = ii;
        }
        functionArray.append("]", 1);

        compileState->v8BindingProgram = functionArray;
        compileState->v8BindingProgramLine = startLineNumber;
    }

    if (bindingCompiler.isValid()) 
        compileState->compiledBindingData = bindingCompiler.program();

    // Check pop()'s matched push()'s
    Q_ASSERT(compileState->objectDepth.depth() == 0);
    Q_ASSERT(compileState->listDepth.depth() == 0);

    saveComponentState();

    return true;
}

void QQmlCompiler::dumpStats()
{
    Q_ASSERT(componentStats);
    qWarning().nospace() << "QML Document: " << output->url.toString();
    for (int ii = 0; ii < componentStats->savedComponentStats.count(); ++ii) {
        const ComponentStat &stat = componentStats->savedComponentStats.at(ii);
        qWarning().nospace() << "    Component Line " << stat.lineNumber;
        qWarning().nospace() << "        Total Objects:      " << stat.objects;
        qWarning().nospace() << "        IDs Used:           " << stat.ids;
        qWarning().nospace() << "        Optimized Bindings: " << stat.optimizedBindings.count();

        {
        QByteArray output;
        for (int ii = 0; ii < stat.optimizedBindings.count(); ++ii) {
            if (0 == (ii % 10)) {
                if (ii) output.append("\n");
                output.append("            ");
            }

            output.append('(');
            output.append(QByteArray::number(stat.optimizedBindings.at(ii).start.line));
            output.append(':');
            output.append(QByteArray::number(stat.optimizedBindings.at(ii).start.column));
            output.append(") ");
        }
        if (!output.isEmpty())
            qWarning().nospace() << output.constData();
        }

        qWarning().nospace() << "        Shared Bindings:    " << stat.sharedBindings.count();
        {
        QByteArray output;
        for (int ii = 0; ii < stat.sharedBindings.count(); ++ii) {
            if (0 == (ii % 10)) {
                if (ii) output.append('\n');
                output.append("            ");
            }

            output.append('(');
            output.append(QByteArray::number(stat.sharedBindings.at(ii).start.line));
            output.append(':');
            output.append(QByteArray::number(stat.sharedBindings.at(ii).start.column));
            output.append(") ");
        }
        if (!output.isEmpty())
            qWarning().nospace() << output.constData();
        }

        qWarning().nospace() << "        QScript Bindings:   " << stat.scriptBindings.count();
        {
        QByteArray output;
        for (int ii = 0; ii < stat.scriptBindings.count(); ++ii) {
            if (0 == (ii % 10)) {
                if (ii) output.append('\n');
                output.append("            ");
            }

            output.append('(');
            output.append(QByteArray::number(stat.scriptBindings.at(ii).start.line));
            output.append(':');
            output.append(QByteArray::number(stat.scriptBindings.at(ii).start.column));
            output.append(") ");
        }
        if (!output.isEmpty())
            qWarning().nospace() << output.constData();
        }
    }
}

/*!
    Returns true if from can be assigned to a (QObject) property of type
    to.
*/
bool QQmlCompiler::canCoerce(int to, QQmlScript::Object *from)
{
    QQmlPropertyCache *toMo = enginePrivate->rawPropertyCacheForType(to);
    QQmlPropertyCache *fromMo = from->metatype;

    while (fromMo) {
        if (fromMo == toMo)
            return true;
        fromMo = fromMo->parent();
    }
    return false;
}

/*!
    Returns the element name, as written in the QML file, for o.
*/
QString QQmlCompiler::elementName(QQmlScript::Object *o)
{
    Q_ASSERT(o);
    if (o->type != -1) {
        return unit->parser().referencedTypes().at(o->type)->name;
    } else {
        return QString();
    }
}

QQmlType *QQmlCompiler::toQmlType(QQmlScript::Object *from)
{
    if (from->type != -1 && output->types.at(from->type).type)
        return output->types.at(from->type).type;

    const QMetaObject *mo = from->metatype->firstCppMetaObject();
    QQmlType *type = 0;
    while (!type && mo) {
        type = QQmlMetaType::qmlType(mo);
        mo = mo->superClass();
    }
   return type;
}

QStringList QQmlCompiler::deferredProperties(QQmlScript::Object *obj)
{
    const QMetaObject *mo = obj->metatype->firstCppMetaObject();

    int idx = mo->indexOfClassInfo("DeferredPropertyNames");
    if (idx == -1)
        return QStringList();

    QMetaClassInfo classInfo = mo->classInfo(idx);
    QStringList rv = QString::fromUtf8(classInfo.value()).split(QLatin1Char(','));
    return rv;
}

QQmlPropertyCache *
QQmlCompiler::propertyCacheForObject(QQmlScript::Object *object)
 {
     if (object->synthCache)
        return object->synthCache;
     else if (object->type != -1)
        return output->types[object->type].createPropertyCache(engine);
     else
        return object->metatype;
}

QQmlPropertyData *
QQmlCompiler::property(QQmlScript::Object *object, int index)
{
    QQmlPropertyCache *cache = propertyCacheForObject(object);

    return cache->property(index);
}

QQmlPropertyData *
QQmlCompiler::property(QQmlScript::Object *object, const QHashedStringRef &name, bool *notInRevision)
{
    if (notInRevision) *notInRevision = false;

    QQmlPropertyCache *cache = propertyCacheForObject(object);

    QQmlPropertyData *d = cache->property(name, 0, 0);

    // Find the first property
    while (d && d->isFunction())
        d = cache->overrideData(d);

    if (d && !cache->isAllowedInRevision(d)) {
        if (notInRevision) *notInRevision = true;
        return 0;
    } else {
        return d;
    }
}

// This code must match the semantics of QQmlPropertyPrivate::findSignalByName
QQmlPropertyData *
QQmlCompiler::signal(QQmlScript::Object *object, const QHashedStringRef &name, bool *notInRevision)
{
    if (notInRevision) *notInRevision = false;

    QQmlPropertyCache *cache = propertyCacheForObject(object);


    QQmlPropertyData *d = cache->property(name, 0, 0);
    if (notInRevision) *notInRevision = false;

    while (d && !(d->isFunction()))
        d = cache->overrideData(d);

    if (d && !cache->isAllowedInRevision(d)) {
        if (notInRevision) *notInRevision = true;
        return 0;
    } else if (d && d->isSignal()) {
        return d;
    }

    if (name.endsWith(Changed_string)) {
        QHashedStringRef propName = name.mid(0, name.length() - Changed_string.length());

        d = property(object, propName, notInRevision);
        if (d) 
            return cache->signal(d->notifyIndex);
    }

    return 0;
}

// This code must match the semantics of QQmlPropertyPrivate::findSignalByName
int QQmlCompiler::indexOfSignal(QQmlScript::Object *object, const QString &name, 
                                        bool *notInRevision)
{
    QQmlPropertyData *d = signal(object, QStringRef(&name), notInRevision);
    return d?d->coreIndex:-1;
}

int QQmlCompiler::indexOfProperty(QQmlScript::Object *object, const QString &name, 
                                          bool *notInRevision)
{
    return indexOfProperty(object, QStringRef(&name), notInRevision);
}

int QQmlCompiler::indexOfProperty(QQmlScript::Object *object, const QHashedStringRef &name, 
                                          bool *notInRevision)
{
    QQmlPropertyData *d = property(object, name, notInRevision);
    return d?d->coreIndex:-1;
}

QT_END_NAMESPACE
