public override IDynamic CreateIterator(IEnvironment environment, IArgs args)
{
var scope = Scope.NewDeclarativeEnvironment();
var generator = new Generator(new GeneratorSteps(Steps));
var iterator = new HGeneratorIterator(environment, generator, VariableDeclarations, scope);
return iterator;
}
public HGeneratorIterator(IEnvironment environment, Generator generator, ReadOnlyList<string> variableDeclarations, ILexicalEnvironment scope)
: base(environment)
{
Generator = generator;
VariableDeclarations = variableDeclarations;
Scope = scope;
}
public bool CombineGeneratorWithIterator(Generator generator, IDynamic other)
{
var iterable = other.ConvertToObject();
var createIterator = iterable.Get("createIterator") as ICallable;
if (createIterator == null)
throw CreateTypeError("");
var iterator = createIterator.Call(this, iterable, EmptyArgs).ConvertToObject();
if (!iterator.HasProperty("current"))
throw CreateTypeError("");
var next = iterator.Get("next") as ICallable;
if (next == null)
throw CreateTypeError("");
GeneratorStep step = null; step = (_e, _g) =>
{
if (!next.Call(this, Undefined, EmptyArgs).ConvertToBoolean().BaseValue)
return false;
generator.Current = iterator.Get("current");
generator.Steps.Enqueue(step);
return true;
};
return step(this, generator);
}
