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Implement type fallback for TimeZoneFormat #983

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nordzilla opened this issue Aug 25, 2021 · 0 comments
Open

Implement type fallback for TimeZoneFormat #983

nordzilla opened this issue Aug 25, 2021 · 0 comments
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@robertbastian
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blocked A dependency must be resolved before this is actionable C-time-zone Component: Time Zones help wanted Issue needs an assignee S-medium Size: Less than a week (larger bug fix or enhancement) T-core Type: Required functionality
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nordzilla commented Aug 25, 2021 •
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The UTS-35 Spec defines type fallback for when certain time variants are requested, but not available.

We are able to perform the first step of type fallback in the data provider itself, however part 2 of type fallback requires context to the exact datetime being formatted.

We should support the full type-fallback algorithm in our runtime formatting, independent of the optimizations we do in data provider. In other words, data provider can help reduce the number of fallbacking steps by smartly pre-packaging the data, but we still need to support the full algorithm.

Part 2 of type fallback requires being able to tell when the next and previous daylight offset changes are, which depends on
This was referenced Aug 25, 2021
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@nordzilla nordzilla added C-datetime Component: datetime, calendars, time zones help wanted Issue needs an assignee S-medium Size: Less than a week (larger bug fix or enhancement) T-core Type: Required functionality blocked A dependency must be resolved before this is actionable labels Aug 25, 2021
@nordzilla nordzilla added this to the ICU4X 0.5 milestone Aug 26, 2021
@nordzilla nordzilla modified the milestones: ICU4X 0.5, ICU4X 1.0 Jan 20, 2022
@sffc sffc added C-time-zone Component: Time Zones and removed C-datetime Component: datetime, calendars, time zones labels Dec 22, 2022
@robertbastian robertbastian mentioned this issue Jan 20, 2025
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@robertbastian robertbastian self-assigned this Jan 20, 2025
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blocked A dependency must be resolved before this is actionable C-time-zone Component: Time Zones help wanted Issue needs an assignee S-medium Size: Less than a week (larger bug fix or enhancement) T-core Type: Required functionality
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Priority Backlog ⟨P3⟩
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@sffc @robertbastian @nordzilla