duration

Arguments: durationspec &key start end

Returns the duration denoted by durationspec. durationspec should be a duration specifyier. start and end are bounding index designators of durationspec. The defaults for start and end are 0 and nil, respectively.

Note the difference between a duration designator and a time-interval designator of a duration. A time-interval designator specifies that a duration begin with the character #\P, as, for example, in "P1Y2MT5H". The corresponding duration designator does not include the initial #\P and would be "1Y2MT5H".

Examples

(require :datetime)
(use-package :util.date-time)

(duration-years (duration "2Y10M15DT10H30M20S")) => 2
(duration-months (duration "00021015T103020")) => 10

See also duration-years, duration-months, duration-weeks, duration-days, duration-hours, duration-minutes, duration-seconds, time-interval, add-duration, subtract-duration.

See date-time.htm for information on support in Allegro CL for parsing and generating time expressions using the ISO 8601 standard.

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This page was not revised from the 8.1 page.
Created 2010.1.21.