diff options
Diffstat (limited to 'lib/kernel/layer.mli')
| -rw-r--r-- | lib/kernel/layer.mli | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/lib/kernel/layer.mli b/lib/kernel/layer.mli index ab6e56b..a71e113 100644 --- a/lib/kernel/layer.mli +++ b/lib/kernel/layer.mli @@ -36,8 +36,17 @@ type 'r index val index : 'r t -> easter:(int -> Date.t) -> years:int list -> 'r index (** Entries falling on [date], fixed and movable together, in the layer's - canonical slug order. *) -val on_date : 'r index -> Date.t -> 'r entry list + canonical slug order. + + [fixed_key] answers "which (month, day) does the FIXED half look up for + this civil date", defaulting to the identity [Some (Date.month date, + Date.day date)] -- exactly today's behaviour, for a caller that supplies + nothing. A rite's own kalends-reckoning convention (see {!Rite.t}'s + [fixed_key] field) is threaded through here rather than applied to + [date] itself, so it touches ONLY the fixed table: the MOVABLE half + (keyed by rata die, via {!Date_spec.Easter_offset}/{!Date_spec. + Nth_weekday}) always uses [date] unchanged. *) +val on_date : ?fixed_key:(Date.t -> (int * int) option) -> 'r index -> Date.t -> 'r entry list (** Loads a layer from a sexp file. Parse and validation failures come back as [Error], never as an exception. *) |