until -package:numeric-prelude -package:base-prelude -package:hosc -package:numhask -package:clash-prelude -package:classy-prelude -package:netwire is:exact -package:mixed-types-num -package:distribution-opensuse -package:faktory

until p f yields the result of applying f until p holds.
repeat action until result fulfills condition
until p f yields the result of applying f until p holds.
until n s0 s1 means that eventually n s1, and up until at least the period before s1 holds, s0 continuously holds. Note: Both argument streams must have sufficient history to drop n values from them.
True until another stream is true, within the time bounds specified. until l u clk dist s0 s1 is true at time t iff there exists a d, with l <= d <= u, such that s1 is true at time (t + d), and for all times t' with t <= t' < t + d, s0 is true at those times.