protected override void ProcessArg(Evaluator evaluater, Result[] argArray)
{
base.ProcessArg(evaluater, argArray);
Type type0 = argArray[0].Type;
Type type1 = argArray[1].Type;
int result;
if (type0 == null && type1 == null)
{
return;
}
if (type0 == null)
{
if (type1.IsValueType)
{
throw new InvalidCastException(string.Format("from null to {0}", type1.Name));
}
if (type1 == typeof(string))
{
argArray[0].Type = typeof(string);
return;
}
else
{
throw new InvalidCastException(string.Format("from null to {0}", type1.Name));
}
}
if (type1 == null)
{
if (type0.IsValueType)
{
throw new InvalidCastException(string.Format("from null to {0}", type0.Name));
}
if (type0 == typeof(string))
{
argArray[1].Type = typeof(string);
return;
}
else
{
throw new InvalidCastException(string.Format("from null to {0}", type0.Name));
}
}
if (BinaryHelper.ComparePrimitiveType(type0, type1, out result))
{
if (result > 0)
{
argArray[1].Value = ConvertHelper.ChangeType(argArray[1].Value, type0);
}
else if (result < 0)
{
argArray[0].Value = ConvertHelper.ChangeType(argArray[0].Value, type1);
}
}
else
{
throw new InvalidCastException(string.Format("from {1} to {0}", type0.Name, type1.Name));
}
}
