[boost] [Proto] Can't statement like expression be part of proto

Subject: [boost] [Proto] Can't statement like expression be part of proto
From: joel falcou (joel.falcou_at_[hidden])
Date: 2010-06-05 14:26:44

after digetsing all the contents of eric boost'con talk i came to the 
conclusion that epxression-tempalte enabled statement may be part of 
proto like operators. One can see the ability of having if or for as a 
real expression geenrator for any EDSL as actaully a feature.

What may prevent if_, for_ and such to be first class, EDSL agnostic 
citizen fo proto ?