type +'a period constraint 'a = [< Period.date_field ]type t = Period.date_field periodval empty : [< Period.date_field ] periodval add : [< Period.date_field ] as 'a period -> 'a period -> 'a periodval sub : [< Period.date_field ] as 'a period -> 'a period -> 'a periodval opp : [< Period.date_field ] as 'a period -> 'a periodval equal :
[< Period.date_field ] period ->
[< Period.date_field ] period ->
boolval compare :
[< Period.date_field ] period ->
[< Period.date_field ] period ->
intval hash : [< Period.date_field ] period -> intval length : [< Period.date_field ] period -> secondval mul : [< Period.date_field ] as 'a period -> 'a period -> 'a periodval div : [< Period.date_field ] as 'a period -> 'a period -> 'a periodval make : int -> int -> second -> [< Period.date_field ] periodval lmake :
?hour:int ->
?minute:int ->
?second:second ->
unit ->
[< Period.date_field ] periodval hour : int -> [< Period.date_field ] periodval minute : int -> [< Period.date_field ] periodval second : second -> [< Period.date_field ] periodval to_seconds : [< Period.date_field ] period -> secondval to_minutes : [< Period.date_field ] period -> floatval to_hours : [< Period.date_field ] period -> float