Expose write_to for DelayedFormat#1654
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djc merged 1 commit intochronotope:mainfrom Jan 23, 2025
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Codecov ReportAll modified and coverable lines are covered by tests ✅
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## main #1654 +/- ##
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+ Coverage 91.01% 91.02% +0.01%
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Files 37 37
Lines 17342 17366 +24
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+ Hits 15784 15808 +24
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src/format/formatting.rs
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| /// ### Writing to a Vec | ||
| /// ``` | ||
| /// // wrapper to allow reuse of the existing string based | ||
| /// // writers | ||
| /// struct IoWriter<W: std::io::Write> { | ||
| /// writer: W, | ||
| /// } | ||
| /// impl<W: std::io::Write> std::fmt::Write for IoWriter<W> { | ||
| /// #[inline] | ||
| /// fn write_str(&mut self, s: &str) -> std::fmt::Result { | ||
| /// self.writer.write_all(s.as_bytes()).map_err(|_| std::fmt::Error) | ||
| /// } | ||
| /// } | ||
| /// let dt = chrono::DateTime::from_timestamp(1643723400, 123456789).unwrap(); | ||
| /// let df = dt.format("%Y-%m-%d %H:%M:%S%.9f"); | ||
| /// let w: Vec<u8> = Vec::new(); | ||
| /// let mut writer = IoWriter { writer: w }; | ||
| /// let _ = df.write_to(&mut writer); | ||
| /// ``` |
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Yes, also not interested in having the Write adapter in the examples.
Request for chronotope#1649 - renamed format to write-to and made it public. - added unittests - added benchmarks to compare and show `Display` is slower than `write_to` in that specific use case.
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Request for #1649
Displayis slower thanwrite_toin that specific use case.supersedes #1653