legal

adj. Loosely used to mean in accordance with all the relevant rules , esp.
in connection with some set of constraints defined by software. The older =+
alternate for += is no longer legal syntax in ANSI C. This parser processes
each line of legal input the moment it sees the trailing linefeed. Hackers
often model their work as a sort of game played with the environment in
which the objective is to maneuver through the thicket of natural laws to
achieve a desired objective. Their use of legal is flavored as much by this
game-playing sense as by the more conventional one having to do with courts
and lawyers. Compare language lawyer , legalese.