until-wp

until-wp(wp)(source)

Create an "until-wp" range ending just before a waypoint (exclusive).

Returns a range marker visible from subslide 1 up to (but not including) the waypoint's first subslide. Does not create a waypoint.

Can be composed with prev-wp / next-wp: until-wp(prev-wp(<my-label>)) ends before the waypoint preceding <my-label>.

Combine with from-wp in an array for bounded ranges: (from-wp(<a>), until-wp(<b>)) — visible from <a> to just before <b>.

Parameters

wp : label | dictionary

A waypoint label or a shifted reference.

Returns: dictionary