duration-years

Arguments: duration

This generic function is the reader for the years slot of the duration class. (The slot value cannot be changed with setf and this function.) The argument must be a duration instance.

The value is the number of years in duration or nil if the slot is not set. If set, the value is an integer.

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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Created 2019.8.20.