until -package:numeric-prelude -package:base-prelude -package:hosc -package:numhask -package:Cabal -package:dimensional -package:foundation -package:mixed-types-num -package:cabal-install-solver -package:classy-prelude package:dunai
Similar to Yampa's delayed switching. Loses a b in case of an
exception.
Run the first
msf until the second one produces
True
from the output of the first.