module Period: sig .. end
A period is the number of days between two date.
Arithmetic operations
include Period.S
Constructors
val make : int -> int -> int -> Date.t
make year month day makes a period of the specified lenght.
val lmake : ?year:int -> ?month:int -> ?day:int -> unit -> Date.t
Labelled version of make.
The default value of each argument is 0.
val year : int -> Date.t
year n makes a period of n years.
val month : int -> Date.t
month n makes a period of n months.
val week : int -> Date.t
week n makes a period of n weeks.
val day : int -> Date.t
day n makes a period of n days.
Getters
exception Not_computable
Since 1.04
val nb_days : Date.t -> int
Number of days in a period. Throw Not_computable
if the number of days is not computable.
E.g. nb_days (day 6) returns 6 but nb_days (year 1) throws
Not_computable because a year is not a constant number of days.
Since 1.04
val ymd : Date.t -> int * int * int
Number of years, months and days in a period.
E.g. ymd (make 1 2 3) returns 1, 2, 3.
Since 1.09.0