firefox-main/third_party/rust/time/src/parsing/parsable.rs

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//! A trait that can be used to parse an item from an input.
use core::num::NonZero;
use core::ops::Deref;
use num_conv::prelude::*;
use crate::error::ParseFromDescription::{InvalidComponent, InvalidLiteral};
use crate::error::TryFromParsed;
#[cfg(feature = "alloc")]
use crate::format_description::OwnedFormatItem;
use crate::format_description::well_known::iso8601::EncodedConfig;
use crate::format_description::well_known::{Iso8601, Rfc2822, Rfc3339};
use crate::format_description::{BorrowedFormatItem, modifier};
use crate::internal_macros::{bug, try_likely_ok};
use crate::parsing::combinator::{
ExactlyNDigits, Sign, any_digit, ascii_char, ascii_char_ignore_case, one_or_two_digits, opt,
sign,
};
use crate::parsing::{Parsed, ParsedItem, component};
use crate::{Date, Month, OffsetDateTime, Time, UtcOffset, error};
/// A type that can be parsed.
#[cfg_attr(docsrs, doc(notable_trait))]
#[doc(alias = "Parseable")]
pub trait Parsable: sealed::Sealed {}
impl Parsable for BorrowedFormatItem<'_> {}
impl Parsable for [BorrowedFormatItem<'_>] {}
#[cfg(feature = "alloc")]
impl Parsable for OwnedFormatItem {}
#[cfg(feature = "alloc")]
impl Parsable for [OwnedFormatItem] {}
impl Parsable for Rfc2822 {}
impl Parsable for Rfc3339 {}
impl<const CONFIG: EncodedConfig> Parsable for Iso8601<CONFIG> {}
impl<T> Parsable for T where T: Deref<Target: Parsable> {}
/// Seal the trait to prevent downstream users from implementing it, while still allowing it to
/// exist in generic bounds.
mod sealed {
use super::*;
use crate::{PrimitiveDateTime, UtcDateTime};
/// Parse the item using a format description and an input.
pub trait Sealed {
/// Parse the item into the provided [`Parsed`] struct.
///
/// This method can be used to parse a single component without parsing the full value.
fn parse_into<'a>(
&self,
input: &'a [u8],
parsed: &mut Parsed,
) -> Result<&'a [u8], error::Parse>;
/// Parse the item into a new [`Parsed`] struct.
///
/// This method can only be used to parse a complete value of a type. If any characters
/// remain after parsing, an error will be returned.
#[inline]
fn parse(&self, input: &[u8]) -> Result<Parsed, error::Parse> {
let mut parsed = Parsed::new();
if self.parse_into(input, &mut parsed)?.is_empty() {
Ok(parsed)
} else {
Err(error::Parse::ParseFromDescription(
error::ParseFromDescription::UnexpectedTrailingCharacters,
))
}
}
/// Parse a [`Date`] from the format description.
#[inline]
fn parse_date(&self, input: &[u8]) -> Result<Date, error::Parse> {
Ok(self.parse(input)?.try_into()?)
}
/// Parse a [`Time`] from the format description.
#[inline]
fn parse_time(&self, input: &[u8]) -> Result<Time, error::Parse> {
Ok(self.parse(input)?.try_into()?)
}
/// Parse a [`UtcOffset`] from the format description.
#[inline]
fn parse_offset(&self, input: &[u8]) -> Result<UtcOffset, error::Parse> {
Ok(self.parse(input)?.try_into()?)
}
/// Parse a [`PrimitiveDateTime`] from the format description.
#[inline]
fn parse_primitive_date_time(
&self,
input: &[u8],
) -> Result<PrimitiveDateTime, error::Parse> {
Ok(self.parse(input)?.try_into()?)
}
/// Parse a [`UtcDateTime`] from the format description.
#[inline]
fn parse_utc_date_time(&self, input: &[u8]) -> Result<UtcDateTime, error::Parse> {
Ok(self.parse(input)?.try_into()?)
}
/// Parse a [`OffsetDateTime`] from the format description.
#[inline]
fn parse_offset_date_time(&self, input: &[u8]) -> Result<OffsetDateTime, error::Parse> {
Ok(self.parse(input)?.try_into()?)
}
}
}
impl sealed::Sealed for BorrowedFormatItem<'_> {
#[inline]
fn parse_into<'a>(
&self,
input: &'a [u8],
parsed: &mut Parsed,
) -> Result<&'a [u8], error::Parse> {
Ok(parsed.parse_item(input, self)?)
}
}
impl sealed::Sealed for [BorrowedFormatItem<'_>] {
#[inline]
fn parse_into<'a>(
&self,
input: &'a [u8],
parsed: &mut Parsed,
) -> Result<&'a [u8], error::Parse> {
Ok(parsed.parse_items(input, self)?)
}
}
#[cfg(feature = "alloc")]
impl sealed::Sealed for OwnedFormatItem {
#[inline]
fn parse_into<'a>(
&self,
input: &'a [u8],
parsed: &mut Parsed,
) -> Result<&'a [u8], error::Parse> {
Ok(parsed.parse_item(input, self)?)
}
}
#[cfg(feature = "alloc")]
impl sealed::Sealed for [OwnedFormatItem] {
#[inline]
fn parse_into<'a>(
&self,
input: &'a [u8],
parsed: &mut Parsed,
) -> Result<&'a [u8], error::Parse> {
Ok(parsed.parse_items(input, self)?)
}
}
impl<T> sealed::Sealed for T
where
T: Deref<Target: sealed::Sealed>,
{
#[inline]
fn parse_into<'a>(
&self,
input: &'a [u8],
parsed: &mut Parsed,
) -> Result<&'a [u8], error::Parse> {
self.deref().parse_into(input, parsed)
}
}
impl sealed::Sealed for Rfc2822 {
fn parse_into<'a>(
&self,
input: &'a [u8],
parsed: &mut Parsed,
) -> Result<&'a [u8], error::Parse> {
use crate::parsing::combinator::rfc::rfc2822::{cfws, fws, zone_literal};
let colon = ascii_char::<b':'>;
let comma = ascii_char::<b','>;
let input = opt(cfws)(input).into_inner();
let weekday = component::parse_weekday(
input,
modifier::Weekday {
repr: modifier::WeekdayRepr::Short,
one_indexed: false,
case_sensitive: false,
},
);
let input = if let Some(item) = weekday {
let input = try_likely_ok!(
item.consume_value(|value| parsed.set_weekday(value))
.ok_or(InvalidComponent("weekday"))
);
let input = try_likely_ok!(comma(input).ok_or(InvalidLiteral)).into_inner();
opt(cfws)(input).into_inner()
} else {
input
};
let input = try_likely_ok!(
one_or_two_digits(input)
.and_then(|item| item.consume_value(|value| parsed.set_day(NonZero::new(value)?)))
.ok_or(InvalidComponent("day"))
);
let input = try_likely_ok!(cfws(input).ok_or(InvalidLiteral)).into_inner();
let input = try_likely_ok!(
component::parse_month(
input,
modifier::Month {
padding: modifier::Padding::None,
repr: modifier::MonthRepr::Short,
case_sensitive: false,
},
)
.and_then(|item| item.consume_value(|value| parsed.set_month(value)))
.ok_or(InvalidComponent("month"))
);
let input = try_likely_ok!(cfws(input).ok_or(InvalidLiteral)).into_inner();
let input = match ExactlyNDigits::<4>::parse(input) {
Some(item) => {
let input = try_likely_ok!(
item.flat_map(|year| if year >= 1900 { Some(year) } else { None })
.and_then(|item| {
item.consume_value(|value| {
parsed.set_year(value.cast_signed().extend())
})
})
.ok_or(InvalidComponent("year"))
);
try_likely_ok!(fws(input).ok_or(InvalidLiteral)).into_inner()
}
None => {
let input = try_likely_ok!(
ExactlyNDigits::<2>::parse(input)
.and_then(|item| {
item.map(|year| year.extend::<u32>())
.map(|year| if year < 50 { year + 2000 } else { year + 1900 })
.map(|year| year.cast_signed())
.consume_value(|value| parsed.set_year(value))
})
.ok_or(InvalidComponent("year"))
);
try_likely_ok!(cfws(input).ok_or(InvalidLiteral)).into_inner()
}
};
let input = try_likely_ok!(
ExactlyNDigits::<2>::parse(input)
.and_then(|item| item.consume_value(|value| parsed.set_hour_24(value)))
.ok_or(InvalidComponent("hour"))
);
let input = opt(cfws)(input).into_inner();
let input = try_likely_ok!(colon(input).ok_or(InvalidLiteral)).into_inner();
let input = opt(cfws)(input).into_inner();
let input = try_likely_ok!(
ExactlyNDigits::<2>::parse(input)
.and_then(|item| item.consume_value(|value| parsed.set_minute(value)))
.ok_or(InvalidComponent("minute"))
);
let input = if let Some(input) = colon(opt(cfws)(input).into_inner()) {
let input = input.into_inner(); // discard the colon
let input = opt(cfws)(input).into_inner();
let input = try_likely_ok!(
ExactlyNDigits::<2>::parse(input)
.and_then(|item| item.consume_value(|value| parsed.set_second(value)))
.ok_or(InvalidComponent("second"))
);
try_likely_ok!(cfws(input).ok_or(InvalidLiteral)).into_inner()
} else {
try_likely_ok!(cfws(input).ok_or(InvalidLiteral)).into_inner()
};
// The RFC explicitly allows leap seconds.
parsed.leap_second_allowed = true;
if let Some(zone_literal) = zone_literal(input) {
let input = try_likely_ok!(
zone_literal
.consume_value(|value| parsed.set_offset_hour(value))
.ok_or(InvalidComponent("offset hour"))
);
try_likely_ok!(
parsed
.set_offset_minute_signed(0)
.ok_or(InvalidComponent("offset minute"))
);
try_likely_ok!(
parsed
.set_offset_second_signed(0)
.ok_or(InvalidComponent("offset second"))
);
return Ok(input);
}
let ParsedItem(input, offset_sign) =
try_likely_ok!(sign(input).ok_or(InvalidComponent("offset hour")));
let input = try_likely_ok!(
ExactlyNDigits::<2>::parse(input)
.and_then(|item| {
item.map(|offset_hour| match offset_sign {
Sign::Negative => -offset_hour.cast_signed(),
Sign::Positive => offset_hour.cast_signed(),
})
.consume_value(|value| parsed.set_offset_hour(value))
})
.ok_or(InvalidComponent("offset hour"))
);
let input = try_likely_ok!(
ExactlyNDigits::<2>::parse(input)
.and_then(|item| {
item.consume_value(|value| parsed.set_offset_minute_signed(value.cast_signed()))
})
.ok_or(InvalidComponent("offset minute"))
);
let input = opt(cfws)(input).into_inner();
Ok(input)
}
fn parse_offset_date_time(&self, input: &[u8]) -> Result<OffsetDateTime, error::Parse> {
use crate::parsing::combinator::rfc::rfc2822::{cfws, fws, zone_literal};
let colon = ascii_char::<b':'>;
let comma = ascii_char::<b','>;
let input = opt(cfws)(input).into_inner();
let weekday = component::parse_weekday(
input,
modifier::Weekday {
repr: modifier::WeekdayRepr::Short,
one_indexed: false,
case_sensitive: false,
},
);
let input = if let Some(item) = weekday {
let input = item.discard_value();
let input = try_likely_ok!(comma(input).ok_or(InvalidLiteral)).into_inner();
opt(cfws)(input).into_inner()
} else {
input
};
let ParsedItem(input, day) =
try_likely_ok!(one_or_two_digits(input).ok_or(InvalidComponent("day")));
let input = try_likely_ok!(cfws(input).ok_or(InvalidLiteral)).into_inner();
let ParsedItem(input, month) = try_likely_ok!(
component::parse_month(
input,
modifier::Month {
padding: modifier::Padding::None,
repr: modifier::MonthRepr::Short,
case_sensitive: false,
},
)
.ok_or(InvalidComponent("month"))
);
let input = try_likely_ok!(cfws(input).ok_or(InvalidLiteral)).into_inner();
let (input, year) = match ExactlyNDigits::<4>::parse(input) {
Some(item) => {
let ParsedItem(input, year) = try_likely_ok!(
item.flat_map(|year| if year >= 1900 { Some(year) } else { None })
.ok_or(InvalidComponent("year"))
);
let input = try_likely_ok!(fws(input).ok_or(InvalidLiteral)).into_inner();
(input, year)
}
None => {
let ParsedItem(input, year) = try_likely_ok!(
ExactlyNDigits::<2>::parse(input)
.map(|item| {
item.map(|year| year.extend::<u16>())
.map(|year| if year < 50 { year + 2000 } else { year + 1900 })
})
.ok_or(InvalidComponent("year"))
);
let input = try_likely_ok!(cfws(input).ok_or(InvalidLiteral)).into_inner();
(input, year)
}
};
let ParsedItem(input, hour) =
try_likely_ok!(ExactlyNDigits::<2>::parse(input).ok_or(InvalidComponent("hour")));
let input = opt(cfws)(input).into_inner();
let input = try_likely_ok!(colon(input).ok_or(InvalidLiteral)).into_inner();
let input = opt(cfws)(input).into_inner();
let ParsedItem(input, minute) =
try_likely_ok!(ExactlyNDigits::<2>::parse(input).ok_or(InvalidComponent("minute")));
let (input, mut second) = if let Some(input) = colon(opt(cfws)(input).into_inner()) {
let input = input.into_inner(); // discard the colon
let input = opt(cfws)(input).into_inner();
let ParsedItem(input, second) =
try_likely_ok!(ExactlyNDigits::<2>::parse(input).ok_or(InvalidComponent("second")));
let input = try_likely_ok!(cfws(input).ok_or(InvalidLiteral)).into_inner();
(input, second)
} else {
(
try_likely_ok!(cfws(input).ok_or(InvalidLiteral)).into_inner(),
0,
)
};
let (input, offset_hour, offset_minute) = if let Some(zone_literal) = zone_literal(input) {
let ParsedItem(input, offset_hour) = zone_literal;
(input, offset_hour, 0)
} else {
let ParsedItem(input, offset_sign) =
try_likely_ok!(sign(input).ok_or(InvalidComponent("offset hour")));
let ParsedItem(input, offset_hour) = try_likely_ok!(
ExactlyNDigits::<2>::parse(input)
.map(|item| {
item.map(|offset_hour| match offset_sign {
Sign::Negative => -offset_hour.cast_signed(),
Sign::Positive => offset_hour.cast_signed(),
})
})
.ok_or(InvalidComponent("offset hour"))
);
let ParsedItem(input, offset_minute) = try_likely_ok!(
ExactlyNDigits::<2>::parse(input).ok_or(InvalidComponent("offset minute"))
);
(input, offset_hour, offset_minute.cast_signed())
};
let input = opt(cfws)(input).into_inner();
if !input.is_empty() {
return Err(error::Parse::ParseFromDescription(
error::ParseFromDescription::UnexpectedTrailingCharacters,
));
}
let mut nanosecond = 0;
let leap_second_input = if second == 60 {
second = 59;
nanosecond = 999_999_999;
true
} else {
false
};
let dt = try_likely_ok!(
(|| {
let date = try_likely_ok!(Date::from_calendar_date(
year.cast_signed().extend(),
month,
day
));
let time = try_likely_ok!(Time::from_hms_nano(hour, minute, second, nanosecond));
let offset = try_likely_ok!(UtcOffset::from_hms(offset_hour, offset_minute, 0));
Ok(OffsetDateTime::new_in_offset(date, time, offset))
})()
.map_err(TryFromParsed::ComponentRange)
);
if leap_second_input && !dt.is_valid_leap_second_stand_in() {
return Err(error::Parse::TryFromParsed(TryFromParsed::ComponentRange(
error::ComponentRange::conditional("second"),
)));
}
Ok(dt)
}
}
impl sealed::Sealed for Rfc3339 {
fn parse_into<'a>(
&self,
input: &'a [u8],
parsed: &mut Parsed,
) -> Result<&'a [u8], error::Parse> {
let dash = ascii_char::<b'-'>;
let colon = ascii_char::<b':'>;
let input = try_likely_ok!(
ExactlyNDigits::<4>::parse(input)
.and_then(|item| {
item.consume_value(|value| parsed.set_year(value.cast_signed().extend()))
})
.ok_or(InvalidComponent("year"))
);
let input = try_likely_ok!(dash(input).ok_or(InvalidLiteral)).into_inner();
let input = try_likely_ok!(
ExactlyNDigits::<2>::parse(input)
.and_then(
|item| item.flat_map(|value| Month::from_number(NonZero::new(value)?).ok())
)
.and_then(|item| item.consume_value(|value| parsed.set_month(value)))
.ok_or(InvalidComponent("month"))
);
let input = try_likely_ok!(dash(input).ok_or(InvalidLiteral)).into_inner();
let input = try_likely_ok!(
ExactlyNDigits::<2>::parse(input)
.and_then(|item| item.consume_value(|value| parsed.set_day(NonZero::new(value)?)))
.ok_or(InvalidComponent("day"))
);
// RFC3339 allows any separator, not just `T`, not just `space`.
// cf. Section 5.6: Internet Date/Time Format:
// NOTE: ISO 8601 defines date and time separated by "T".
// Applications using this syntax may choose, for the sake of
// readability, to specify a full-date and full-time separated by
// (say) a space character.
// Specifically, rusqlite uses space separators.
let input = try_likely_ok!(input.get(1..).ok_or(InvalidComponent("separator")));
let input = try_likely_ok!(
ExactlyNDigits::<2>::parse(input)
.and_then(|item| item.consume_value(|value| parsed.set_hour_24(value)))
.ok_or(InvalidComponent("hour"))
);
let input = try_likely_ok!(colon(input).ok_or(InvalidLiteral)).into_inner();
let input = try_likely_ok!(
ExactlyNDigits::<2>::parse(input)
.and_then(|item| item.consume_value(|value| parsed.set_minute(value)))
.ok_or(InvalidComponent("minute"))
);
let input = try_likely_ok!(colon(input).ok_or(InvalidLiteral)).into_inner();
let input = try_likely_ok!(
ExactlyNDigits::<2>::parse(input)
.and_then(|item| item.consume_value(|value| parsed.set_second(value)))
.ok_or(InvalidComponent("second"))
);
let input = if let Some(ParsedItem(input, ())) = ascii_char::<b'.'>(input) {
let ParsedItem(mut input, mut value) =
try_likely_ok!(any_digit(input).ok_or(InvalidComponent("subsecond")))
.map(|v| (v - b'0').extend::<u32>() * 100_000_000);
let mut multiplier = 10_000_000;
while let Some(ParsedItem(new_input, digit)) = any_digit(input) {
value += (digit - b'0').extend::<u32>() * multiplier;
input = new_input;
multiplier /= 10;
}
try_likely_ok!(
parsed
.set_subsecond(value)
.ok_or(InvalidComponent("subsecond"))
);
input
} else {
input
};
// The RFC explicitly allows leap seconds.
parsed.leap_second_allowed = true;
if let Some(ParsedItem(input, ())) = ascii_char_ignore_case::<b'Z'>(input) {
try_likely_ok!(
parsed
.set_offset_hour(0)
.ok_or(InvalidComponent("offset hour"))
);
try_likely_ok!(
parsed
.set_offset_minute_signed(0)
.ok_or(InvalidComponent("offset minute"))
);
try_likely_ok!(
parsed
.set_offset_second_signed(0)
.ok_or(InvalidComponent("offset second"))
);
return Ok(input);
}
let ParsedItem(input, offset_sign) =
try_likely_ok!(sign(input).ok_or(InvalidComponent("offset hour")));
let input = try_likely_ok!(
ExactlyNDigits::<2>::parse(input)
.and_then(|item| {
item.filter(|&offset_hour| offset_hour <= 23)?
.map(|offset_hour| match offset_sign {
Sign::Negative => -offset_hour.cast_signed(),
Sign::Positive => offset_hour.cast_signed(),
})
.consume_value(|value| parsed.set_offset_hour(value))
})
.ok_or(InvalidComponent("offset hour"))
);
let input = try_likely_ok!(colon(input).ok_or(InvalidLiteral)).into_inner();
let input = try_likely_ok!(
ExactlyNDigits::<2>::parse(input)
.and_then(|item| {
item.map(|offset_minute| match offset_sign {
Sign::Negative => -offset_minute.cast_signed(),
Sign::Positive => offset_minute.cast_signed(),
})
.consume_value(|value| parsed.set_offset_minute_signed(value))
})
.ok_or(InvalidComponent("offset minute"))
);
Ok(input)
}
fn parse_offset_date_time(&self, input: &[u8]) -> Result<OffsetDateTime, error::Parse> {
let dash = ascii_char::<b'-'>;
let colon = ascii_char::<b':'>;
let ParsedItem(input, year) =
try_likely_ok!(ExactlyNDigits::<4>::parse(input).ok_or(InvalidComponent("year")));
let input = try_likely_ok!(dash(input).ok_or(InvalidLiteral)).into_inner();
let ParsedItem(input, month) = try_likely_ok!(
ExactlyNDigits::<2>::parse(input)
.and_then(|parsed| parsed.flat_map(NonZero::new))
.ok_or(InvalidComponent("month"))
);
let input = try_likely_ok!(dash(input).ok_or(InvalidLiteral)).into_inner();
let ParsedItem(input, day) =
try_likely_ok!(ExactlyNDigits::<2>::parse(input).ok_or(InvalidComponent("day")));
// RFC3339 allows any separator, not just `T`, not just `space`.
// cf. Section 5.6: Internet Date/Time Format:
// NOTE: ISO 8601 defines date and time separated by "T".
// Applications using this syntax may choose, for the sake of
// readability, to specify a full-date and full-time separated by
// (say) a space character.
// Specifically, rusqlite uses space separators.
let input = try_likely_ok!(input.get(1..).ok_or(InvalidComponent("separator")));
let ParsedItem(input, hour) =
try_likely_ok!(ExactlyNDigits::<2>::parse(input).ok_or(InvalidComponent("hour")));
let input = try_likely_ok!(colon(input).ok_or(InvalidLiteral)).into_inner();
let ParsedItem(input, minute) =
try_likely_ok!(ExactlyNDigits::<2>::parse(input).ok_or(InvalidComponent("minute")));
let input = try_likely_ok!(colon(input).ok_or(InvalidLiteral)).into_inner();
let ParsedItem(input, mut second) =
try_likely_ok!(ExactlyNDigits::<2>::parse(input).ok_or(InvalidComponent("second")));
let ParsedItem(input, mut nanosecond) =
if let Some(ParsedItem(input, ())) = ascii_char::<b'.'>(input) {
let ParsedItem(mut input, mut value) =
try_likely_ok!(any_digit(input).ok_or(InvalidComponent("subsecond")))
.map(|v| (v - b'0').extend::<u32>() * 100_000_000);
let mut multiplier = 10_000_000;
while let Some(ParsedItem(new_input, digit)) = any_digit(input) {
value += (digit - b'0').extend::<u32>() * multiplier;
input = new_input;
multiplier /= 10;
}
ParsedItem(input, value)
} else {
ParsedItem(input, 0)
};
let ParsedItem(input, offset) = {
if let Some(ParsedItem(input, ())) = ascii_char_ignore_case::<b'Z'>(input) {
ParsedItem(input, UtcOffset::UTC)
} else {
let ParsedItem(input, offset_sign) =
try_likely_ok!(sign(input).ok_or(InvalidComponent("offset hour")));
let ParsedItem(input, offset_hour) = try_likely_ok!(
ExactlyNDigits::<2>::parse(input)
.and_then(|parsed| parsed.filter(|&offset_hour| offset_hour <= 23))
.ok_or(InvalidComponent("offset hour"))
);
let input = try_likely_ok!(colon(input).ok_or(InvalidLiteral)).into_inner();
let ParsedItem(input, offset_minute) = try_likely_ok!(
ExactlyNDigits::<2>::parse(input).ok_or(InvalidComponent("offset minute"))
);
try_likely_ok!(
match offset_sign {
Sign::Negative => UtcOffset::from_hms(
-offset_hour.cast_signed(),
-offset_minute.cast_signed(),
0,
),
Sign::Positive => UtcOffset::from_hms(
offset_hour.cast_signed(),
offset_minute.cast_signed(),
0,
),
}
.map(|offset| ParsedItem(input, offset))
.map_err(TryFromParsed::ComponentRange)
)
}
};
if !input.is_empty() {
return Err(error::Parse::ParseFromDescription(
error::ParseFromDescription::UnexpectedTrailingCharacters,
));
}
// The RFC explicitly permits leap seconds. We don't currently support them, so treat it as
// the preceding nanosecond. However, leap seconds can only occur as the last second of the
// month UTC.
let leap_second_input = if second == 60 {
second = 59;
nanosecond = 999_999_999;
true
} else {
false
};
let date = try_likely_ok!(
Month::from_number(month)
.and_then(|month| Date::from_calendar_date(year.cast_signed().extend(), month, day))
.map_err(TryFromParsed::ComponentRange)
);
let time = try_likely_ok!(
Time::from_hms_nano(hour, minute, second, nanosecond)
.map_err(TryFromParsed::ComponentRange)
);
let dt = OffsetDateTime::new_in_offset(date, time, offset);
if leap_second_input && !dt.is_valid_leap_second_stand_in() {
return Err(error::Parse::TryFromParsed(TryFromParsed::ComponentRange(
error::ComponentRange::conditional("second"),
)));
}
Ok(dt)
}
}
impl<const CONFIG: EncodedConfig> sealed::Sealed for Iso8601<CONFIG> {
#[inline]
fn parse_into<'a>(
&self,
mut input: &'a [u8],
parsed: &mut Parsed,
) -> Result<&'a [u8], error::Parse> {
use crate::parsing::combinator::rfc::iso8601::ExtendedKind;
let mut extended_kind = ExtendedKind::Unknown;
let mut date_is_present = false;
let mut time_is_present = false;
let mut offset_is_present = false;
let mut first_error = None;
parsed.leap_second_allowed = true;
match Self::parse_date(parsed, &mut extended_kind)(input) {
Ok(new_input) => {
input = new_input;
date_is_present = true;
}
Err(err) => {
first_error.get_or_insert(err);
}
}
match Self::parse_time(parsed, &mut extended_kind, date_is_present)(input) {
Ok(new_input) => {
input = new_input;
time_is_present = true;
}
Err(err) => {
first_error.get_or_insert(err);
}
}
// If a date and offset are present, a time must be as well.
if !date_is_present || time_is_present {
match Self::parse_offset(parsed, &mut extended_kind)(input) {
Ok(new_input) => {
input = new_input;
offset_is_present = true;
}
Err(err) => {
first_error.get_or_insert(err);
}
}
}
if !date_is_present && !time_is_present && !offset_is_present {
match first_error {
Some(err) => return Err(err),
None => bug!("an error should be present if no components were parsed"),
}
}
Ok(input)
}
}