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Diffstat (limited to 'lib/kernel/date_spec.mli')
| -rw-r--r-- | lib/kernel/date_spec.mli | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/lib/kernel/date_spec.mli b/lib/kernel/date_spec.mli new file mode 100644 index 0000000..600f1eb --- /dev/null +++ b/lib/kernel/date_spec.mli @@ -0,0 +1,12 @@ +(** A sanctoral entry's date expression. *) +type t = Fixed of { month : int; day : int } [@@deriving sexp] + +val sexp_of_t : t -> Sexplib0.Sexp.t +val t_of_sexp : Sexplib0.Sexp.t -> t + +(** Validates against the leap-year maximum, so 29 February is constructible. *) +val fixed : month:int -> day:int -> (t, string) result + +(** [None] when the spec does not occur in that year (29 February in a common + year) or falls outside the supported domain. *) +val resolve : t -> year:int -> Date.t option |