/// <summary>
/// Creates the TypedArray prototype object.
/// </summary>
/// <param name="engine"> The script environment. </param>
/// <param name="constructor"> A reference to the constructor that owns the prototype. </param>
internal static ObjectInstance CreatePrototype(ScriptEngine engine, TypedArrayConstructor constructor)
{
var result = engine.Object.Construct();
var properties = GetDeclarativeProperties(engine);
properties.Add(new PropertyNameAndValue("constructor", constructor, PropertyAttributes.NonEnumerable));
// From the spec: the initial value of the @@iterator property is the same function
// object as the initial value of the %TypedArray%.prototype.values property.
PropertyNameAndValue valuesProperty = properties.Find(p => "values".Equals(p.Key));
if (valuesProperty == null)
{
throw new InvalidOperationException("Expected values property.");
}
properties.Add(new PropertyNameAndValue(Symbol.Iterator, valuesProperty.Value, PropertyAttributes.NonEnumerable));
result.InitializeProperties(properties);
return(result);
}
/// <summary>
/// Creates the Map prototype object.
/// </summary>
/// <param name="engine"> The script environment. </param>
/// <param name="constructor"> A reference to the constructor that owns the prototype. </param>
internal static ObjectInstance CreatePrototype(ScriptEngine engine, MapConstructor constructor)
{
var result = engine.Object.Construct();
var properties = GetDeclarativeProperties(engine);
properties.Add(new PropertyNameAndValue("constructor", constructor, PropertyAttributes.NonEnumerable));
properties.Add(new PropertyNameAndValue(engine.Symbol.ToStringTag, "Map", PropertyAttributes.Configurable));
// From the spec: the initial value of the @@iterator property is the same function
// object as the initial value of the Map.prototype.entries property.
PropertyNameAndValue entriesProperty = properties.Find(p => "entries".Equals(p.Key));
if (entriesProperty == null)
{
throw new InvalidOperationException("Expected entries property.");
}
properties.Add(new PropertyNameAndValue(engine.Symbol.Iterator, entriesProperty.Value, PropertyAttributes.NonEnumerable));
result.FastSetProperties(properties);
return(result);
}
