dizzy wrote:
Hello
On Friday 11 January 2008 15:47:59 Tobias Schwinger wrote:
dizzy wrote:
I would like to know if boost implements something similar I just skimmed your post very quicky, but it seems you might perhaps want to read this thread:
Thanks for your link, it was an interesting read (along with the referenced article). It appears this if-istype/else technique is widely employed when needing a non-intrusive Visitor, when one cannot modify original hierarchy API (even tho I can modify it I still prefer the nonintrusive version as I find the action of needing to visit the hierarchy a decision of the user and not a feature for the hierarchy to provide it).
So the logic of finding the type liniarly can be rewritten in my code to use boost::mpl features as from the link provided. Even so, if boost does not have such a generic Visitor feature, wouldn't it be a good addition?
Honestly, I find its practical value rather questionable. From where I stand, the need for such a thing does most likely indicate that inheritance is probably used in a place where it shouldn't. Regards, Tobias