public override async Task VisitAsync(Function function)
{
var args = new L.Expression[function.Expressions.Length];
for (int i = 0; i < function.Expressions.Length; i++)
{
await function.Expressions[i].AcceptAsync(this);
args[i] = _result;
}
switch (function.Identifier.Name.ToLowerInvariant())
{
case "if":
_result = L.Expression.Condition(args[0], args[1], args[2]);
break;
case "in":
var items = L.Expression.NewArrayInit(args[0].Type,
new ArraySegment <L.Expression>(args, 1, args.Length - 1));
var smi = typeof(Array).GetRuntimeMethod("IndexOf", new[] { typeof(Array), typeof(object) });
var r = L.Expression.Call(smi, L.Expression.Convert(items, typeof(Array)), L.Expression.Convert(args[0], typeof(object)));
_result = L.Expression.GreaterThanOrEqual(r, L.Expression.Constant(0));
break;
default:
var mi = FindMethod(function.Identifier.Name, args);
var asyncAttrib = (AsyncStateMachineAttribute)mi.BaseMethodInfo.GetCustomAttribute(typeof(AsyncStateMachineAttribute));
//method is async
if (asyncAttrib != null)
{
object classInstance = Activator.CreateInstance(_context.Type, null);
var methodParamList = new List <object>();
foreach (var argItem in args)
{
methodParamList.Add(ValueExpression.GetUnderlyingValue(argItem));
}
var invokedMethod = mi.BaseMethodInfo.Invoke(classInstance, methodParamList.ToArray());
switch (invokedMethod)
{
case Task <Boolean> invokedMethodTyped:
_result = L.Expression.Constant(await invokedMethodTyped);
break;
case Task <DateTime> invokedMethodTyped:
_result = L.Expression.Constant(await invokedMethodTyped);
break;
case Task <Decimal> invokedMethodTyped:
_result = L.Expression.Constant(await invokedMethodTyped);
break;
case Task <Double> invokedMethodTyped:
_result = L.Expression.Constant(await invokedMethodTyped);
break;
case Task <Single> invokedMethodTyped:
_result = L.Expression.Constant(await invokedMethodTyped);
break;
case Task <Byte> invokedMethodTyped:
_result = L.Expression.Constant(await invokedMethodTyped);
break;
case Task <SByte> invokedMethodTyped:
_result = L.Expression.Constant(await invokedMethodTyped);
break;
case Task <Int16> invokedMethodTyped:
_result = L.Expression.Constant(await invokedMethodTyped);
break;
case Task <Int32> invokedMethodTyped:
_result = L.Expression.Constant(await invokedMethodTyped);
break;
case Task <Int64> invokedMethodTyped:
_result = L.Expression.Constant(await invokedMethodTyped);
break;
case Task <UInt16> invokedMethodTyped:
_result = L.Expression.Constant(await invokedMethodTyped);
break;
case Task <UInt32> invokedMethodTyped:
_result = L.Expression.Constant(await invokedMethodTyped);
break;
case Task <UInt64> invokedMethodTyped:
_result = L.Expression.Constant(await invokedMethodTyped);
break;
case Task <String> invokedMethodTyped:
_result = L.Expression.Constant(await invokedMethodTyped);
break;
}
}
else
{
_result = L.Expression.Call(_context, mi.BaseMethodInfo, mi.PreparedArguments);
}
break;
}
}