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Implement parsing and formatting for Instant as separate functions #411

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Implement parsing and formatting of ISO strings for instant values separately from the rest of the library.

A stage of fixing #382

This is a draft PR because we probably don't need to actually merge it into the datetime library. However, the code is already written and can be reviewed.

Comment on lines 173 to 175
total += (y + 3) / 4 - (y + 99) / 100 + (y + 399) / 400
} else {
total -= y / -4 - y / -100 + y / -400
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@ilya-g ilya-g Oct 30, 2024

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Looks like a case for ceilDiv in stdlib :)

@dkhalanskyjb dkhalanskyjb changed the base branch from master to uniform-ranges November 5, 2024 13:18
@dkhalanskyjb dkhalanskyjb changed the title Prepare Instant for entering the standard library Implement parsing and formatting for Instant as separate functions Nov 7, 2024
Comment on lines +401 to +409
private fun parseInstant(isoString: String): Instant {
// return Instant.parse(isoString)
return parseIso(isoString)
}

private fun displayInstant(instant: Instant): String {
// return instant.toString()
return formatIso(instant)
}
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@qurbonzoda, here's the logic behind this PR: the newly-added formatIso can replace toString, and the newly-added parseIso can replace Instant.parse in the case when no specific format is passed (which is the only case supported by `kotlin.time.Instant).

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2 participants