id,summary,reporter,owner,description,type,status,milestone,component,version,severity,resolution,keywords,cc 1623,fusion needs a reverse_fold algorithm,Eric Niebler,Christopher Schmidt,"I can fold a reverse_view, but that's a little awkward, and TMP-heavy. That is, it instantiates more templates than are needed. Would be nice if Fusion had a reverse_fold algorithm, like MPL. This is needed for Proto, which has a reverse_fold transform based in part on fusion::fold and reverse_view. I've had to introduce ugly PP metaprogramming to avoid calling fusion::fold because of the long compile times.",Feature Requests,closed,Boost 1.44.0,fusion,Boost Development Trunk,Optimization,fixed,,