private IType checkItemIterator(IType elemType, Context context) throws SyntaxError {
Context child = context.newChildContext();
Identifier itemName = v2 == null ? v1 : v2;
context.registerValue(new Variable(itemName, elemType));
if (v2 != null) context.registerValue(new Variable(v1, IntegerType.instance()));
return instructions.check(child);
}
private IValue evaluateItemIteratorWithIndex(IType elemType, Context context)
throws PromptoError {
IValue src = source.interpret(context);
Iterator<IValue> iterator = getIterator(context, src);
long index = 0L;
while (iterator.hasNext()) {
Context child = context.newChildContext();
child.registerValue(new Variable(v2, elemType));
child.setValue(v2, iterator.next());
child.registerValue(new Variable(v1, IntegerType.instance()));
child.setValue(v1, new Integer(++index));
IValue value = instructions.interpret(child);
if (value != null) return value;
}
return null;
}