1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
|
// Copyright (C) 2018 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#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('@'));
QString desc(s);
StringOrSymbol::init(desc.data_ptr());
identifier = PropertyKey::fromStringOrSymbol(internalClass->engine, this);
}
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(") + QStringView{toQString()}.mid(1) + QLatin1String(")");
}
|
