/// <summary>
/// Converts a DynValue to a CLR object of a specific type
/// </summary>
internal static object DynValueToObjectOfType(DynValue value, Type desiredType, object defaultValue, bool isOptional)
{
if (desiredType.IsByRef)
{
desiredType = desiredType.GetElementType();
}
var converter = Script.GlobalOptions.CustomConverters.GetScriptToClrCustomConversion(value.Type, desiredType);
if (converter != null)
{
var v = converter(value);
if (v != null)
{
return(v);
}
}
if (desiredType == typeof(DynValue))
{
return(value);
}
if (desiredType == typeof(object))
{
return(DynValueToObject(value));
}
StringConversions.StringSubtype stringSubType = StringConversions.GetStringSubtype(desiredType);
string str = null;
Type nt = Nullable.GetUnderlyingType(desiredType);
Type nullableType = null;
if (nt != null)
{
nullableType = desiredType;
desiredType = nt;
}
switch (value.Type)
{
case DataType.Void:
if (isOptional)
{
return(defaultValue);
}
else if (!desiredType.IsValueType || (nullableType != null))
{
return(null);
}
break;
case DataType.Nil:
if (desiredType.IsValueType)
{
if (nullableType != null)
{
return(null);
}
if (isOptional)
{
return(defaultValue);
}
}
else
{
return(null);
}
break;
case DataType.Boolean:
if (desiredType == typeof(bool))
{
return(value.Boolean);
}
if (stringSubType != StringConversions.StringSubtype.None)
{
str = value.Boolean.ToString();
}
break;
case DataType.Number:
if (desiredType.IsEnum)
{ // number to enum conv
Type underType = Enum.GetUnderlyingType(desiredType);
return(NumericConversions.DoubleToType(underType, value.Number));
}
if (NumericConversions.NumericTypes.Contains(desiredType))
{
object d = NumericConversions.DoubleToType(desiredType, value.Number);
if (d.GetType() == desiredType)
{
return(d);
}
break;
}
if (stringSubType != StringConversions.StringSubtype.None)
{
str = value.Number.ToString();
}
break;
case DataType.String:
if (stringSubType != StringConversions.StringSubtype.None)
{
str = value.String;
}
break;
case DataType.Function:
if (desiredType == typeof(Closure))
{
return(value.Function);
}
else if (desiredType == typeof(ScriptFunctionDelegate))
{
return(value.Function.GetDelegate());
}
break;
case DataType.ClrFunction:
if (desiredType == typeof(CallbackFunction))
{
return(value.Callback);
}
else if (desiredType == typeof(Func <ScriptExecutionContext, CallbackArguments, DynValue>))
{
return(value.Callback.ClrCallback);
}
break;
case DataType.UserData:
if (value.UserData.Object != null)
{
var udObj = value.UserData.Object;
var udDesc = value.UserData.Descriptor;
if (udDesc.IsTypeCompatible(desiredType, udObj))
{
return(udObj);
}
if (stringSubType != StringConversions.StringSubtype.None)
{
str = udDesc.AsString(udObj);
}
}
break;
case DataType.Table:
if (desiredType == typeof(Table) || desiredType.IsAssignableFrom(typeof(Table)))
{
return(value.Table);
}
else
{
object o = TableConversions.ConvertTableToType(value.Table, desiredType);
if (o != null)
{
return(o);
}
}
break;
case DataType.Tuple:
break;
}
if (stringSubType != StringConversions.StringSubtype.None && str != null)
{
return(StringConversions.ConvertString(stringSubType, str, desiredType, value.Type));
}
throw ScriptRuntimeException.ConvertObjectFailed(value.Type, desiredType);
}
