klion26 commented on code in PR #10114:
URL: https://github.com/apache/arrow-rs/pull/10114#discussion_r3894231362
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arrow-cast/src/parse.rs:
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@@ -646,7 +646,36 @@ fn parse_extended_ymd(string: &str) -> Option<(i32, u32,
u32)> {
Some((year, month, day))
}
-fn parse_date(string: &str) -> Option<NaiveDate> {
+/// Parse a given date string into a `NaiveDate`.
+///
+/// ```
+/// /// You can parse from ISO date strings
+/// use chrono::NaiveDate;
+/// use arrow_cast::parse::{parse_date, parse_decimal};
+/// let s1 = "2026-06-10";
+/// let d1 = parse_date(s1).unwrap();
+/// let expected_d1 = NaiveDate::from_ymd_opt(2026, 6, 10).unwrap();
+/// assert_eq!(expected_d1, d1);
+///
+/// // or from ISO extended(signed) year date strings
+/// let s2 = "+2026-06-10";
+/// let d2 = parse_date(s2).unwrap();
+/// let expected_d2 = NaiveDate::from_ymd_opt(2026, 6, 10).unwrap();
+/// assert_eq!(expected_d2, d2);
+///
+/// // or from date strings without hyphen
+/// let s3 = "20260610";
+/// let d3 = parse_date(s3).unwrap();
+/// let expected_d3 = NaiveDate::from_ymd_opt(2026, 6, 10).unwrap();
+/// assert_eq!(expected_d3, d3);
+///
+/// // or from datetime strings
+/// let s4 = "2026-06-10T14:23:45";
+/// let d4 = parse_date(s4).unwrap();
+/// let expected_d4 = NaiveDate::from_ymd_opt(2026, 6, 10).unwrap();
+/// assert_eq!(expected_d4, d4);
+/// ```
+pub fn parse_date(string: &str) -> Option<NaiveDate> {
Review Comment:
This case just wants to show the supported format of this function; it is
not used in the current change.
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