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Diffstat (limited to 'lib/kernel/rite.mli')
| -rw-r--r-- | lib/kernel/rite.mli | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/lib/kernel/rite.mli b/lib/kernel/rite.mli index db8e86f..6d12dd4 100644 --- a/lib/kernel/rite.mli +++ b/lib/kernel/rite.mli @@ -15,4 +15,28 @@ type ('s, 'r) t = { (** the expected run-length-compressed season sequence over one liturgical year. NOT necessarily [vocab.seasons]: a rite may have one season appear in two separate runs (the modern form's Ordinary Time does). *) + transfer_target : + 'r Precedence.candidate -> Date.t -> (Date.t -> 'r Celebration.t) -> Date.t; + (** RG 96: where an impeded I-class feast goes. Given the deferred + candidate, the date it was impeded on, and [occupant] -- a callback + exposing what {!Calendar} currently resolves as observed on any + given date -- returns the date to place it on. + + Deliberately one rite-supplied function, not a generic search Calendar + drives itself: "not I or II class" is not derivable from [band] or + [disposition] alone. RG 91's own table would let a universal I-class + feast (entry 11) numerically outrank an ordinary Sunday (entry 15, + II class) in a raw occurrence contest -- entry 11 comes before entry + 15, and lower wins -- so testing "would the translated feast win + here" is not the same question as "is this day free to receive a + translation": RG 96 forbids landing on the Sunday regardless of + which one would structurally win. Only the rite knows which of its + own ranks are exempt from translation onto them. The rite also + owns the search's starting point, because RG 96's exception is + rite-specific too: the Annunciation does not search forward from + its own impeded date at all, it goes straight to the Monday after + Low Sunday (searching onward from there only if that day is itself + blocked). [occupant] is supplied rather than a raw layer/temporal + pair so the rite never has to re-implement occurrence resolution + just to answer "what sits here". *) } |