diff options
Diffstat (limited to 'lib/rites/rite_of/lectionary_of.mli')
| -rw-r--r-- | lib/rites/rite_of/lectionary_of.mli | 50 |
1 files changed, 48 insertions, 2 deletions
diff --git a/lib/rites/rite_of/lectionary_of.mli b/lib/rites/rite_of/lectionary_of.mli index 0c4d1d6..4a447d2 100644 --- a/lib/rites/rite_of/lectionary_of.mli +++ b/lib/rites/rite_of/lectionary_of.mli @@ -110,8 +110,13 @@ val weekday_cycle : year_start:(int -> Date.t) -> Date.t -> weekday_cycle closed kernel type outside this task's own scope to extend; see lectionary_of.ml's own implementation comment on this branch for the full argument. [said] the observed slug. - - {b Step 3} -- the day's own temporal slug, same three-way lookup. - {!Colitur_kernel.Mass_formulary.Own_slug}, [said] that slug. + - {b Step 3} -- the day's own temporal slug. FIRST tries + {!date_keyed_slug} (OLM n. 69.3's date-fixed windows -- the + O-Antiphons and the pre-Epiphany run of the Christmas season), THEN + falls back to the same three-way slug lookup step 2 uses. + {!Colitur_kernel.Mass_formulary.Own_slug} either way, [said] the + temporal office's own slug -- {!date_keyed_slug} changes which KEY + resolves the citations, not which office is said to have said them. - A day matching neither gets [(None, [])] -- see data/of/lectionary .sexp's own provenance header for exactly which days that is, both directions, measured, not guessed. @@ -134,3 +139,44 @@ val readings : date:Date.t -> temporal_at:(Date.t -> (Vocab_of.season, Vocab_of.rank) Temporal.t) -> Mass_formulary.t option * Citation.t list + +(** OLM 1981 Praenotanda n. 69.3 (the same passage {!weekday_cycle}'s own + doc comment cites: "Pro feriis Adventus, temporis Nativitatis et + paschalis cyclus eodem modo annualis est: lectiones ideo non + mutantur" -- Advent/Christmastide/Paschaltide ferial readings do not + change year to year). Every OTHER such family is non-alternating + WITHIN a weekday slot ({!weekday_cycle}); two short windows go + further and are keyed by CIVIL DATE instead: the O-Antiphon days + (17-24 December) and the pre-Epiphany run of the Christmas season + (29-31 December, then 2-5 and 7 January) -- verified concretely + against lectio's own ini, not merely inferred from the citation: 17 + December is Gen 49:2,8-10 / Ps 72:1-2,3-4ab,7-8,17 / Matthew 1:1-17 + regardless which weekday it falls on in a given year. + {!Rite_of.Temporal_of}'s own ferial slugs for these same civil dates + are WEEKDAY-keyed + ({!Rite_of.Temporal_of.christmas_feria_slug}/the Advent ferial + branch), so looking one of THOSE slugs up would silently serve + whichever OTHER date happens to share that year's weekday alignment + -- the defect this function exists to close (bug found by review, not + by a test: colitur used to serve 17 December the unrelated + "advent-3-mon" reading in years where the two happened to align). + + 6 January is deliberately NOT one of the six Christmas-season dates, + despite lectio's own "christmas-jan-6" base existing: + {!Rite_of.Temporal_of}'s own [named] fixes Epiphany to 6 January + unconditionally (temporal_of.ml, "m = 1 && dd = 6"), so that date is + never reached as a ferial by {!readings}'s own step 3 in the first + place -- a real lectio entry with no reachable colitur day, the same + "structurally unreachable" shape as tools/bootstrap_lectionary_of + .ml's own "easter-6-thu"/"advent-4-sat" (see its own [excluded_bases] + comment). + + [None] on a Sunday: Advent 4, Holy Family, the Second Sunday after + Christmas and the Baptism of the Lord can each land inside these two + windows, each is a NAMED office with its own distinct slug + ({!Rite_of.Temporal_of.sunday_slug}), and each must keep taking + priority over a ferial date -- checked here explicitly rather than + trusted to the call site, since this function's whole contract is + "this civil date, unconditionally, is this citation", which is false + on the Sunday the window shares its calendar date with. *) +val date_keyed_slug : Date.t -> Slug.t option |