Use parse_rfc3339 directly in DateTime::parse_from_rfc3339

src/datetime/mod.rs

@@ -22,8 +22,9 @@ use std::time::{SystemTime, UNIX_EPOCH};
 use crate::format::DelayedFormat;
 #[cfg(feature = "unstable-locales")]
 use crate::format::Locale;
-use crate::format::{parse, parse_and_remainder, ParseError, ParseResult, Parsed, StrftimeItems};
+use crate::format::{parse, parse_and_remainder, parse_rfc3339};
 use crate::format::{Fixed, Item};
+use crate::format::{ParseError, ParseResult, Parsed, StrftimeItems};
 use crate::naive::{Days, IsoWeek, NaiveDate, NaiveDateTime, NaiveTime};
 #[cfg(feature = "clock")]
 use crate::offset::Local;
@@ -631,9 +632,8 @@ impl DateTime<FixedOffset> {
     /// also simultaneously valid RFC 3339 values, but not all RFC 3339 values are valid ISO 8601
     /// values (or the other way around).
     pub fn parse_from_rfc3339(s: &str) -> ParseResult<DateTime<FixedOffset>> {
-        const ITEMS: &[Item<'static>] = &[Item::Fixed(Fixed::RFC3339)];
         let mut parsed = Parsed::new();
-        parse(&mut parsed, s, ITEMS.iter())?;
+        parse_rfc3339(&mut parsed, s)?;
         parsed.to_datetime()
     }
 

src/format/mod.rs

@@ -56,6 +56,7 @@ use crate::{Month, ParseMonthError, ParseWeekdayError, Weekday};
 #[cfg(feature = "unstable-locales")]
 pub(crate) mod locales;
 
+pub(crate) use parse::parse_rfc3339;
 pub use parse::{parse, parse_and_remainder};
 pub use parsed::Parsed;
 /// L10n locales.

src/format/parse.rs

@@ -157,7 +157,7 @@ fn parse_rfc2822<'a>(parsed: &mut Parsed, mut s: &'a str) -> ParseResult<(&'a st
     Ok((s, ()))
 }
 
-fn parse_rfc3339<'a>(parsed: &mut Parsed, mut s: &'a str) -> ParseResult<(&'a str, ())> {
+pub(crate) fn parse_rfc3339<'a>(parsed: &mut Parsed, mut s: &'a str) -> ParseResult<(&'a str, ())> {
     macro_rules! try_consume {
         ($e:expr) => {{
             let (s_, v) = $e?;