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The keyword ago behaves differently here than in GNU date. #131

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yuankunzhang opened this issue Apr 22, 2025 · 0 comments
Open

The keyword ago behaves differently here than in GNU date. #131

yuankunzhang opened this issue Apr 22, 2025 · 0 comments

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@yuankunzhang
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Problem

In this implementation, ago may appear only once -- at the end of the entire expression -- and its effect is global, reversing all preceding date‑time displacements as a single group.

GNU date treats ago as a local modifier: it can follow any individual displacement, may be used multiple times in the same expression, and applies only to the displacement that immediately precedes it.

Examples

$ date
Tue Apr 22 10:06:38 PM +08 2025

$ date -d '2 days 3 days ago'
Mon Apr 21 10:07:03 PM +08 2025
$ coreutils date -d '2 days 3 days ago'
Thu Apr 17 22:07:14 UTC 2025

$ date -d '2 days ago 3 days ago'
Thu Apr 17 10:08:33 PM +08 2025
$ coreutils date -d '2 days ago 3 days ago'
date: invalid date '2 days ago 3 days ago'
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formalize grammar of relative time strings and use nom to parse them yuankunzhang/parse_datetime
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