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/****************************************************************************
**
** Copyright (C) 2021 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtQml module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:COMM$
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** $QT_END_LICENSE$
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
****************************************************************************/
#include <qv4symbol_p.h>
#include <qv4functionobject_p.h>
#include <qv4identifiertable_p.h>
using namespace QV4;
DEFINE_OBJECT_VTABLE(SymbolCtor);
DEFINE_MANAGED_VTABLE(Symbol);
DEFINE_OBJECT_VTABLE(SymbolObject);
void Heap::Symbol::init(const QString &s)
{
Q_ASSERT(s.at(0) == QLatin1Char('@'));
identifier = PropertyKey::fromStringOrSymbol(this);
QString desc(s);
text = desc.data_ptr();
text->ref.ref();
}
void Heap::SymbolCtor::init(QV4::ExecutionContext *scope)
{
Heap::FunctionObject::init(scope, QStringLiteral("Symbol"));
}
void Heap::SymbolObject::init(const QV4::Symbol *s)
{
Object::init();
symbol.set(internalClass->engine, s->d());
}
ReturnedValue QV4::SymbolCtor::virtualCall(const QV4::FunctionObject *f, const QV4::Value *, const QV4::Value *argv, int argc)
{
Scope scope(f);
QString desc = QChar::fromLatin1('@');
if (argc && !argv[0].isUndefined()) {
ScopedString s(scope, argv[0].toString(scope.engine));
if (scope.hasException())
return Encode::undefined();
desc += s->toQString();
}
return Symbol::create(scope.engine, desc)->asReturnedValue();
}
ReturnedValue SymbolCtor::virtualCallAsConstructor(const FunctionObject *f, const Value *, int, const Value *)
{
return f->engine()->throwTypeError(QStringLiteral("Symbol can't be used together with |new|."));
}
ReturnedValue SymbolCtor::method_for(const FunctionObject *f, const Value *, const Value *argv, int argc)
{
Scope scope(f);
ScopedValue k(scope, argc ? argv[0]: Value::undefinedValue());
ScopedString key(scope, k->toString(scope.engine));
if (scope.hasException())
return Encode::undefined();
QString desc = QLatin1Char('@') + key->toQString();
return scope.engine->identifierTable->insertSymbol(desc)->asReturnedValue();
}
ReturnedValue SymbolCtor::method_keyFor(const FunctionObject *f, const Value *, const Value *argv, int argc)
{
ExecutionEngine *e = f->engine();
if (!argc || !argv[0].isSymbol())
return e->throwTypeError(QLatin1String("Symbol.keyFor: Argument is not a symbol."));
const Symbol &arg = static_cast<const Symbol &>(argv[0]);
Heap::Symbol *s = e->identifierTable->symbolForId(arg.propertyKey());
Q_ASSERT(!s || s == arg.d());
if (s)
return e->newString(arg.toQString().mid((1)))->asReturnedValue();
return Encode::undefined();
}
void SymbolPrototype::init(ExecutionEngine *engine, Object *ctor)
{
Scope scope(engine);
ScopedValue v(scope);
ctor->defineReadonlyProperty(engine->id_prototype(), (v = this));
ctor->defineReadonlyConfigurableProperty(engine->id_length(), Value::fromInt32(0));
ctor->defineDefaultProperty(QStringLiteral("for"), SymbolCtor::method_for, 1);
ctor->defineDefaultProperty(QStringLiteral("keyFor"), SymbolCtor::method_keyFor, 1);
ctor->defineReadonlyProperty(QStringLiteral("hasInstance"), *engine->symbol_hasInstance());
ctor->defineReadonlyProperty(QStringLiteral("isConcatSpreadable"), *engine->symbol_isConcatSpreadable());
ctor->defineReadonlyProperty(QStringLiteral("iterator"), *engine->symbol_iterator());
ctor->defineReadonlyProperty(QStringLiteral("match"), *engine->symbol_match());
ctor->defineReadonlyProperty(QStringLiteral("replace"), *engine->symbol_replace());
ctor->defineReadonlyProperty(QStringLiteral("search"), *engine->symbol_search());
ctor->defineReadonlyProperty(QStringLiteral("species"), *engine->symbol_species());
ctor->defineReadonlyProperty(QStringLiteral("split"), *engine->symbol_split());
ctor->defineReadonlyProperty(QStringLiteral("toPrimitive"), *engine->symbol_toPrimitive());
ctor->defineReadonlyProperty(QStringLiteral("toStringTag"), *engine->symbol_toStringTag());
ctor->defineReadonlyProperty(QStringLiteral("unscopables"), *engine->symbol_unscopables());
defineDefaultProperty(QStringLiteral("constructor"), (v = ctor));
defineDefaultProperty(QStringLiteral("toString"), method_toString);
defineDefaultProperty(QStringLiteral("valueOf"), method_valueOf);
defineDefaultProperty(engine->symbol_toPrimitive(), method_symbolToPrimitive, 1, Attr_ReadOnly_ButConfigurable);
v = engine->newString(QStringLiteral("Symbol"));
defineReadonlyConfigurableProperty(engine->symbol_toStringTag(), v);
}
ReturnedValue SymbolPrototype::method_toString(const FunctionObject *f, const Value *thisObject, const Value *, int)
{
Scope scope(f);
Scoped<Symbol> s(scope, thisObject->as<Symbol>());
if (!s) {
if (const SymbolObject *o = thisObject->as<SymbolObject>())
s = o->d()->symbol;
else
return scope.engine->throwTypeError();
}
return scope.engine->newString(s->descriptiveString())->asReturnedValue();
}
ReturnedValue SymbolPrototype::method_valueOf(const FunctionObject *f, const Value *thisObject, const Value *, int)
{
Scope scope(f);
Scoped<Symbol> s(scope, thisObject->as<Symbol>());
if (!s) {
if (const SymbolObject *o = thisObject->as<SymbolObject>())
s = o->d()->symbol;
else
return scope.engine->throwTypeError();
}
return s->asReturnedValue();
}
ReturnedValue SymbolPrototype::method_symbolToPrimitive(const FunctionObject *f, const Value *thisObject, const Value *, int)
{
if (thisObject->isSymbol())
return thisObject->asReturnedValue();
if (const SymbolObject *o = thisObject->as<SymbolObject>())
return o->d()->symbol->asReturnedValue();
return f->engine()->throwTypeError();
}
Heap::Symbol *Symbol::create(ExecutionEngine *e, const QString &s)
{
Q_ASSERT(s.at(0) == QLatin1Char('@'));
return e->memoryManager->alloc<Symbol>(s);
}
QString Symbol::descriptiveString() const
{
return QLatin1String("Symbol(") + toQString().midRef(1) + QLatin1String(")");
}
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