protected override object EvaluateInternal()
{
var a = _engine.Array.ConstructFast(_hasSpreads ? 0 : (uint)_expressions.Length);
var expressions = _expressions;
uint arrayIndexCounter = 0;
for (uint i = 0; i < (uint)expressions.Length; i++)
{
var expr = expressions[i];
if (expr == null)
{
arrayIndexCounter++;
continue;
}
if (_hasSpreads && expr is JintSpreadExpression jse)
{
jse.GetValueAndCheckIterator(out var objectInstance, out var iterator);
// optimize for array
if (objectInstance is ArrayInstance ai)
{
var length = ai.GetLength();
var newLength = arrayIndexCounter + length;
a.EnsureCapacity(newLength);
a.CopyValues(ai, sourceStartIndex: 0, targetStartIndex: arrayIndexCounter, length);
arrayIndexCounter += length;
a.SetLength(newLength);
}
else
{
var protocol = new ArraySpreadProtocol(_engine, a, iterator, arrayIndexCounter);
protocol.Execute();
arrayIndexCounter += protocol._addedCount;
}
}
else
{
var value = expr.GetValue();
a.SetIndexValue(arrayIndexCounter++, value, updateLength: false);
}
}
if (_hasSpreads)
{
a.SetLength(arrayIndexCounter);
}
return(a);
}
protected override ExpressionResult EvaluateInternal(EvaluationContext context)
{
var engine = context.Engine;
var a = engine.Realm.Intrinsics.Array.ArrayCreate(_hasSpreads ? 0 : (uint)_expressions.Length);
uint arrayIndexCounter = 0;
foreach (var expr in _expressions)
{
if (expr == null)
{
arrayIndexCounter++;
continue;
}
if (_hasSpreads && expr is JintSpreadExpression jse)
{
jse.GetValueAndCheckIterator(context, out var objectInstance, out var iterator);
// optimize for array
if (objectInstance is ArrayInstance ai)
{
var length = ai.GetLength();
var newLength = arrayIndexCounter + length;
a.EnsureCapacity(newLength);
a.CopyValues(ai, sourceStartIndex: 0, targetStartIndex: arrayIndexCounter, length);
arrayIndexCounter += length;
a.SetLength(newLength);
}
else
{
var protocol = new ArraySpreadProtocol(engine, a, iterator, arrayIndexCounter);
protocol.Execute();
arrayIndexCounter += protocol._addedCount;
}
}
else
{
var value = expr.GetValue(context).Value;
a.SetIndexValue(arrayIndexCounter++, value, updateLength: false);
}
}
if (_hasSpreads)
{
a.SetLength(arrayIndexCounter);
}
return(NormalCompletion(a));
}
protected JsValue[] BuildArgumentsWithSpreads(JintExpression[] jintExpressions)
{
var args = new System.Collections.Generic.List <JsValue>(jintExpressions.Length);
for (var i = 0; i < jintExpressions.Length; i++)
{
var jintExpression = jintExpressions[i];
if (jintExpression is JintSpreadExpression jse)
{
jse.GetValueAndCheckIterator(out var objectInstance, out var iterator);
// optimize for array
if (objectInstance is ArrayInstance ai)
{
var length = ai.GetLength();
for (uint j = 0; j < length; ++j)
{
if (ai.TryGetValue(j, out var value))
{
args.Add(value);
}
}
}
else
{
var protocol = new ArraySpreadProtocol(_engine, args, iterator);
protocol.Execute();
}
}
else
{
args.Add(jintExpression.GetValue().Clone());
}
}
return(args.ToArray());
}