public void Execute(ExecutionState state)
{
IList list;
if (expr is IListExpression)
{
list = ((IListExpression)expr).GetList(state);
}
else
{
list = expr.Evaluate(state, listToken) as IList;
if (list == null)
{
throw new InstructionExecutionException("\"" + listToken.Value + "\" doesn't contain a list of anything.", listToken);
}
}
//if (state.HasVariable(iteratorToken.Value))
// throw new InstructionExecutionException("\"" + iteratorToken.Value + "\" already equates to something else. You should use a different word.", iteratorToken);
foreach (object item in list)
{
state.Variables[iteratorToken.Value] = item;
instructions.Execute(state);
}
state.Variables.Remove(iteratorToken.Value);
}
public void Execute(ExecutionState state)
{
DateTime start = DateTime.Now;
DateTime stop = start.AddSeconds(15);
while (true)
{
if (DateTime.Now > stop)
{
throw new InstructionExecutionException("I have stopped the \"while\" loop because more than 15 seconds has passed, which means something has likely gone wrong.", token);
}
object val = expr.Evaluate(state, token);
if (val == null)
{
break;
}
if (BooleanExpression.True.Equals(val))
{
list.Execute(state);
}
else
{
break;
}
}
}