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;lib:spanExtend: improve doc

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Simon Michael 2025-08-28 14:01:48 +01:00
parent 5c6ea2f56e
commit 4e52c7bd76
1 changed files with 5 additions and 3 deletions
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8
hledger-lib/Hledger/Data/Dates.hs
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@ -399,9 +399,11 @@ spanValidDefaultsFrom s1 s2 =
-- DateSpan ..2024-12-31 -- DateSpan ..2024-12-31
spanUnion (DateSpan b1 e1) (DateSpan b2 e2) = DateSpan (earlier b1 b2) (later e1 e2) spanUnion (DateSpan b1 e1) (DateSpan b2 e2) = DateSpan (earlier b1 b2) (later e1 e2)
-- | Extend the first span to include any definite end dates of the second. -- | Extend the definite start/end dates of the first span, if needed,
-- Unlike spanUnion, open ends in the second are ignored. -- to include the definite start/end dates of the second span.
-- If the first span was open-ended, it still will be after being extended. -- And/or, replace open start/end dates in the first span with
-- definite start/end dates from the second.
-- Unlike spanUnion, open start/end dates in the second are ignored.
-- --
-- >>> ys2024 = fromGregorian 2024 01 01 -- >>> ys2024 = fromGregorian 2024 01 01
-- >>> ys2025 = fromGregorian 2025 01 01 -- >>> ys2025 = fromGregorian 2025 01 01