internal void Add(JsSymbol symbol)
{
if (_customSymbolLookup == null)
{
_customSymbolLookup = new Dictionary <JsValue, JsSymbol>();
}
_customSymbolLookup[symbol._value] = symbol;
}
protected void SetIntrinsicValue(JsSymbol symbol, JsValue value, bool writable, bool enumerable, bool configurable)
{
if (_intrinsicProperties == null)
{
_intrinsicProperties = new Dictionary <string, PropertyDescriptor>();
}
_intrinsicProperties[symbol.AsSymbol()] = new PropertyDescriptor(value, writable, enumerable, configurable);
}
public SymbolInstance Construct(JsSymbol symbol)
{
var instance = new SymbolInstance(Engine)
{
_prototype = PrototypeObject,
SymbolData = symbol
};
return(instance);
}
public SymbolInstance Construct(JsSymbol symbol)
{
var instance = new SymbolInstance(Engine)
{
Prototype = PrototypeObject,
SymbolData = symbol,
Extensible = true
};
return(instance);
}
public JsValue For(JsValue thisObj, JsValue[] arguments)
{
var stringKey = TypeConverter.ToString(arguments.At(0));
// 2. ReturnIfAbrupt(stringKey).
JsSymbol symbol;
if (!Engine.GlobalSymbolRegistry.TryGetValue(stringKey, out symbol))
{
symbol = new JsSymbol(stringKey);
Engine.GlobalSymbolRegistry.Add(stringKey, symbol);
}
return(symbol);
}
/// <summary>
/// http://www.ecma-international.org/ecma-262/6.0/index.html#sec-symbol-description
/// </summary>
public override JsValue Call(JsValue thisObject, JsValue[] arguments)
{
var description = arguments.At(0);
var descString = description.IsUndefined()
? Undefined
: TypeConverter.ToString(description);
if (ReturnOnAbruptCompletion(ref descString))
{
return(descString);
}
var value = new JsSymbol(TypeConverter.ToString(description));
return(value);
}
protected bool TryGetIntrinsicValue(JsSymbol symbol, out JsValue value)
{
PropertyDescriptor descriptor;
if (_intrinsicProperties != null && _intrinsicProperties.TryGetValue(symbol.AsSymbol(), out descriptor))
{
value = descriptor.Value;
return(true);
}
if (ReferenceEquals(Prototype, null))
{
value = Undefined;
return(false);
}
return(Prototype.TryGetIntrinsicValue(symbol, out value));
}
internal bool TryGetSymbol(JsValue key, out JsSymbol symbol)
{
symbol = null;
return(_customSymbolLookup != null &&
_customSymbolLookup.TryGetValue(key, out symbol));
}
public SymbolInstance Construct(JsSymbol symbol)
{
return(new SymbolInstance(Engine, PrototypeObject, symbol));
}
private static string SymbolDescriptiveString(JsSymbol symbol) => symbol.ToString();
public string SymbolDescriptiveString(JsSymbol sym)
{
return($"Symbol({sym.AsSymbol()})");
}
internal SymbolInstance(Engine engine, SymbolPrototype prototype, JsSymbol symbol)
: base(engine, ObjectClass.Symbol)
{
_prototype = prototype;
SymbolData = symbol;
}
internal void Add(JsSymbol symbol)
{
_customSymbolLookup ??= new Dictionary <JsValue, JsSymbol>();
_customSymbolLookup[symbol._value] = symbol;
}
