| public GetSwitchConditionEvaluator ( Expression expr, TextManager manager ) : ISwitchConditionEvaluator | ||
| expr | Expression | |
| manager | TextManager | |
| Результат | ISwitchConditionEvaluator | |
public override void Visit(Switch sw, object state)
{
if (!string.IsNullOrEmpty(sw.SwitchTemplateName))
{
int i = 1;
//Apply the template name as @TemplateName1, @TemplateName2, @TemplateName3 to cases without conditions
foreach (var sc in sw.Cases.Where(x => x.Condition == null))
{
//The last case takes everything that the first ones didn't
if (i == sw.Cases.Count)
{
sc.Evaluator = new TakeAllCondition();
}
else
{
sc.Evaluator = _dialect.GetSwitchConditionEvaluator(Expression.Text(
string.Format("@{0}{1}", sw.SwitchTemplateName, i++)), _manager);
}
}
}
//Order switches so that condition-less branches come last
sw.Cases = sw.Cases.OrderBy(x => x.Condition == null ? 1 : 0).ToList();
// This may be language specific and can be handled with templates or parameter lookups instead
//else
//{
// if ((sw.Cases.Count == 2 || sw.Cases.Count == 3) && !sw.Cases.Any(x => x.Condition != null))
// {
// sw.Cases[0].Evaluator = new SingleValueCondition<int>(0);
// if (sw.Cases.Count > 2)
// {
// sw.Cases[2].Evaluator = new SingleValueCondition<int>(-1);
// sw.Cases = new List<SwitchCase> { sw.Cases[0], sw.Cases[2], sw.Cases[1] };
// }
// }
//}
}
public override void Visit(SwitchCase sc, object state)
{
sc.Evaluator = _dialect.GetSwitchConditionEvaluator(sc.Condition, _manager);
base.Visit(sc, null);
}
