public MapInstance Construct(object iterable)
{
// Create a new set.
var result = new MapInstance(this.InstancePrototype);
// If iterable is not null or undefined, then iterate through the values and add them to the set.
if (iterable != Undefined.Value && iterable != Null.Value)
{
var iterator = TypeUtilities.GetIterator(Engine, TypeConverter.ToObject(Engine, iterable));
if (iterator != null)
{
// Get a reference to the set function.
var setFunc = result["set"] as FunctionInstance;
if (setFunc == null)
throw new JavaScriptException(Engine, ErrorType.TypeError, "Missing 'set' function");
// Call the set function for each value.
foreach (var value in TypeUtilities.Iterate(Engine, iterator))
{
var obj = value as ObjectInstance;
if (obj == null)
throw new JavaScriptException(Engine, ErrorType.TypeError, $"Expected iterator return value to be an object, but was {value}");
setFunc.Call(result, obj[0], obj[1]);
}
}
}
return result;
}
// INITIALIZATION
//_________________________________________________________________________________________
/// <summary>
/// Creates a new map iterator.
/// </summary>
/// <param name="prototype"> The next object in the prototype chain. </param>
/// <param name="map"> The map to iterate over. </param>
/// <param name="list"> The linked list to iterate over. </param>
/// <param name="kind"> The type of values to return. </param>
internal MapIterator(ObjectInstance prototype, MapInstance map, LinkedList<KeyValuePair<object, object>> list, Kind kind)
: base(prototype)
{
this.map = map;
this.map.BeforeDelete += Map_BeforeDelete;
this.list = list;
this.kind = kind;
}