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Portability layer
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03/09/1998 15:55:58
 
 
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Forum:
Visual FoxPro
Catégorie:
Codage, syntaxe et commandes
Titre:
Portability layer
Divers
Thread ID:
00132981
Message ID:
00132981
Vues:
50
Anybody ever implemented a portability wrapper for VFP? I mean create a class, say _VFP, that contains methods that correspond to every (most?) VFP command/function.

So, instead of writing
cText = LEFT("abc", 2)

you would write
cText = _VFP.Left("abc", 2)


I can't count the number of times that such a layer would have saved me from having to go back and rework some code. Example: for internationalization issues I want all my LEFTs to be LEFTCs. With the wrapper, I could implement the Left() method to call LEFTC and not touch my code. I could change all my _VFP.MessageBox(...) calls to actually be implemented as a MsgSvc() call or whatever.

I don't know the performance issues involved, but there certainly seem to be some merits to doing this.


Bob
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