chrono/format/strftime.rs
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// This is a part of Chrono.
// See README.md and LICENSE.txt for details.
/*!
`strftime`/`strptime`-inspired date and time formatting syntax.
## Specifiers
The following specifiers are available both to formatting and parsing.
| Spec. | Example | Description |
|-------|----------|----------------------------------------------------------------------------|
| | | **DATE SPECIFIERS:** |
| `%Y` | `2001` | The full proleptic Gregorian year, zero-padded to 4 digits. chrono supports years from -262144 to 262143. Note: years before 1 BCE or after 9999 CE, require an initial sign (+/-).|
| `%C` | `20` | The proleptic Gregorian year divided by 100, zero-padded to 2 digits. [^1] |
| `%y` | `01` | The proleptic Gregorian year modulo 100, zero-padded to 2 digits. [^1] |
| | | |
| `%m` | `07` | Month number (01--12), zero-padded to 2 digits. |
| `%b` | `Jul` | Abbreviated month name. Always 3 letters. |
| `%B` | `July` | Full month name. Also accepts corresponding abbreviation in parsing. |
| `%h` | `Jul` | Same as `%b`. |
| | | |
| `%d` | `08` | Day number (01--31), zero-padded to 2 digits. |
| `%e` | ` 8` | Same as `%d` but space-padded. Same as `%_d`. |
| | | |
| `%a` | `Sun` | Abbreviated weekday name. Always 3 letters. |
| `%A` | `Sunday` | Full weekday name. Also accepts corresponding abbreviation in parsing. |
| `%w` | `0` | Sunday = 0, Monday = 1, ..., Saturday = 6. |
| `%u` | `7` | Monday = 1, Tuesday = 2, ..., Sunday = 7. (ISO 8601) |
| | | |
| `%U` | `28` | Week number starting with Sunday (00--53), zero-padded to 2 digits. [^2] |
| `%W` | `27` | Same as `%U`, but week 1 starts with the first Monday in that year instead.|
| | | |
| `%G` | `2001` | Same as `%Y` but uses the year number in ISO 8601 week date. [^3] |
| `%g` | `01` | Same as `%y` but uses the year number in ISO 8601 week date. [^3] |
| `%V` | `27` | Same as `%U` but uses the week number in ISO 8601 week date (01--53). [^3] |
| | | |
| `%j` | `189` | Day of the year (001--366), zero-padded to 3 digits. |
| | | |
| `%D` | `07/08/01` | Month-day-year format. Same as `%m/%d/%y`. |
| `%x` | `07/08/01` | Locale's date representation (e.g., 12/31/99). |
| `%F` | `2001-07-08` | Year-month-day format (ISO 8601). Same as `%Y-%m-%d`. |
| `%v` | ` 8-Jul-2001` | Day-month-year format. Same as `%e-%b-%Y`. |
| | | |
| | | **TIME SPECIFIERS:** |
| `%H` | `00` | Hour number (00--23), zero-padded to 2 digits. |
| `%k` | ` 0` | Same as `%H` but space-padded. Same as `%_H`. |
| `%I` | `12` | Hour number in 12-hour clocks (01--12), zero-padded to 2 digits. |
| `%l` | `12` | Same as `%I` but space-padded. Same as `%_I`. |
| | | |
| `%P` | `am` | `am` or `pm` in 12-hour clocks. |
| `%p` | `AM` | `AM` or `PM` in 12-hour clocks. |
| | | |
| `%M` | `34` | Minute number (00--59), zero-padded to 2 digits. |
| `%S` | `60` | Second number (00--60), zero-padded to 2 digits. [^4] |
| `%f` | `26490000` | Number of nanoseconds since last whole second. [^7] |
| `%.f` | `.026490`| Decimal fraction of a second. Consumes the leading dot. [^7] |
| `%.3f`| `.026` | Decimal fraction of a second with a fixed length of 3. |
| `%.6f`| `.026490` | Decimal fraction of a second with a fixed length of 6. |
| `%.9f`| `.026490000` | Decimal fraction of a second with a fixed length of 9. |
| `%3f` | `026` | Decimal fraction of a second like `%.3f` but without the leading dot. |
| `%6f` | `026490` | Decimal fraction of a second like `%.6f` but without the leading dot. |
| `%9f` | `026490000` | Decimal fraction of a second like `%.9f` but without the leading dot. |
| | | |
| `%R` | `00:34` | Hour-minute format. Same as `%H:%M`. |
| `%T` | `00:34:60` | Hour-minute-second format. Same as `%H:%M:%S`. |
| `%X` | `00:34:60` | Locale's time representation (e.g., 23:13:48). |
| `%r` | `12:34:60 AM` | Locale's 12 hour clock time. (e.g., 11:11:04 PM). Falls back to `%X` if the locale does not have a 12 hour clock format. |
| | | |
| | | **TIME ZONE SPECIFIERS:** |
| `%Z` | `ACST` | Local time zone name. Skips all non-whitespace characters during parsing. Identical to `%:z` when formatting. [^8] |
| `%z` | `+0930` | Offset from the local time to UTC (with UTC being `+0000`). |
| `%:z` | `+09:30` | Same as `%z` but with a colon. |
|`%::z`|`+09:30:00`| Offset from the local time to UTC with seconds. |
|`%:::z`| `+09` | Offset from the local time to UTC without minutes. |
| `%#z` | `+09` | *Parsing only:* Same as `%z` but allows minutes to be missing or present. |
| | | |
| | | **DATE & TIME SPECIFIERS:** |
|`%c`|`Sun Jul 8 00:34:60 2001`|Locale's date and time (e.g., Thu Mar 3 23:05:25 2005). |
| `%+` | `2001-07-08T00:34:60.026490+09:30` | ISO 8601 / RFC 3339 date & time format. [^5] |
| | | |
| `%s` | `994518299` | UNIX timestamp, the number of seconds since 1970-01-01 00:00 UTC. [^6]|
| | | |
| | | **SPECIAL SPECIFIERS:** |
| `%t` | | Literal tab (`\t`). |
| `%n` | | Literal newline (`\n`). |
| `%%` | | Literal percent sign. |
It is possible to override the default padding behavior of numeric specifiers `%?`.
This is not allowed for other specifiers and will result in the `BAD_FORMAT` error.
Modifier | Description
-------- | -----------
`%-?` | Suppresses any padding including spaces and zeroes. (e.g. `%j` = `012`, `%-j` = `12`)
`%_?` | Uses spaces as a padding. (e.g. `%j` = `012`, `%_j` = ` 12`)
`%0?` | Uses zeroes as a padding. (e.g. `%e` = ` 9`, `%0e` = `09`)
Notes:
[^1]: `%C`, `%y`:
This is floor division, so 100 BCE (year number -99) will print `-1` and `99` respectively.
[^2]: `%U`:
Week 1 starts with the first Sunday in that year.
It is possible to have week 0 for days before the first Sunday.
[^3]: `%G`, `%g`, `%V`:
Week 1 is the first week with at least 4 days in that year.
Week 0 does not exist, so this should be used with `%G` or `%g`.
[^4]: `%S`:
It accounts for leap seconds, so `60` is possible.
[^5]: `%+`: Same as `%Y-%m-%dT%H:%M:%S%.f%:z`, i.e. 0, 3, 6 or 9 fractional
digits for seconds and colons in the time zone offset.
<br>
<br>
This format also supports having a `Z` or `UTC` in place of `%:z`. They
are equivalent to `+00:00`.
<br>
<br>
Note that all `T`, `Z`, and `UTC` are parsed case-insensitively.
<br>
<br>
The typical `strftime` implementations have different (and locale-dependent)
formats for this specifier. While Chrono's format for `%+` is far more
stable, it is best to avoid this specifier if you want to control the exact
output.
[^6]: `%s`:
This is not padded and can be negative.
For the purpose of Chrono, it only accounts for non-leap seconds
so it slightly differs from ISO C `strftime` behavior.
[^7]: `%f`, `%.f`:
<br>
`%f` and `%.f` are notably different formatting specifiers.<br>
`%f` counts the number of nanoseconds since the last whole second, while `%.f` is a fraction of a
second.<br>
Example: 7μs is formatted as `7000` with `%f`, and formatted as `.000007` with `%.f`.
[^8]: `%Z`:
Since `chrono` is not aware of timezones beyond their offsets, this specifier
**only prints the offset** when used for formatting. The timezone abbreviation
will NOT be printed. See [this issue](https://github.com/chronotope/chrono/issues/960)
for more information.
<br>
<br>
Offset will not be populated from the parsed data, nor will it be validated.
Timezone is completely ignored. Similar to the glibc `strptime` treatment of
this format code.
<br>
<br>
It is not possible to reliably convert from an abbreviation to an offset,
for example CDT can mean either Central Daylight Time (North America) or
China Daylight Time.
*/
#[cfg(feature = "alloc")]
extern crate alloc;
use super::{fixed, internal_fixed, num, num0, nums};
#[cfg(feature = "unstable-locales")]
use super::{locales, Locale};
use super::{Fixed, InternalInternal, Item, Numeric, Pad};
#[cfg(any(feature = "alloc", feature = "std"))]
use super::{ParseError, BAD_FORMAT};
#[cfg(all(feature = "alloc", not(feature = "std"), not(test)))]
use alloc::vec::Vec;
/// Parsing iterator for `strftime`-like format strings.
///
/// See the [`format::strftime` module](crate::format::strftime) for supported formatting
/// specifiers.
///
/// `StrftimeItems` is used in combination with more low-level methods such as [`format::parse()`]
/// or [`format_with_items`].
///
/// If formatting or parsing date and time values is not performance-critical, the methods
/// [`parse_from_str`] and [`format`] on types such as [`DateTime`](crate::DateTime) are easier to
/// use.
///
/// [`format`]: crate::DateTime::format
/// [`format_with_items`]: crate::DateTime::format
/// [`parse_from_str`]: crate::DateTime::parse_from_str
/// [`DateTime`]: crate::DateTime
/// [`format::parse()`]: crate::format::parse()
#[derive(Clone, Debug)]
pub struct StrftimeItems<'a> {
/// Remaining portion of the string.
remainder: &'a str,
/// If the current specifier is composed of multiple formatting items (e.g. `%+`),
/// `queue` stores a slice of `Item`s that have to be returned one by one.
queue: &'static [Item<'static>],
#[cfg(feature = "unstable-locales")]
locale_str: &'a str,
#[cfg(feature = "unstable-locales")]
locale: Option<Locale>,
}
impl<'a> StrftimeItems<'a> {
/// Creates a new parsing iterator from a `strftime`-like format string.
///
/// # Errors
///
/// While iterating [`Item::Error`] will be returned if the format string contains an invalid
/// or unrecognized formatting specifier.
///
/// # Example
///
/// ```
/// use chrono::format::*;
///
/// let strftime_parser = StrftimeItems::new("%F"); // %F: year-month-day (ISO 8601)
///
/// const ISO8601_YMD_ITEMS: &[Item<'static>] = &[
/// Item::Numeric(Numeric::Year, Pad::Zero),
/// Item::Literal("-"),
/// Item::Numeric(Numeric::Month, Pad::Zero),
/// Item::Literal("-"),
/// Item::Numeric(Numeric::Day, Pad::Zero),
/// ];
/// assert!(strftime_parser.eq(ISO8601_YMD_ITEMS.iter().cloned()));
/// ```
#[must_use]
pub const fn new(s: &'a str) -> StrftimeItems<'a> {
#[cfg(not(feature = "unstable-locales"))]
{
StrftimeItems { remainder: s, queue: &[] }
}
#[cfg(feature = "unstable-locales")]
{
StrftimeItems { remainder: s, queue: &[], locale_str: "", locale: None }
}
}
/// Creates a new parsing iterator from a `strftime`-like format string, with some formatting
/// specifiers adjusted to match [`Locale`].
///
/// Note: `StrftimeItems::new_with_locale` only localizes the *format*. You usually want to
/// combine it with other locale-aware methods such as
/// [`DateTime::format_localized_with_items`] to get things like localized month or day names.
///
/// The `%x` formatting specifier will use the local date format, `%X` the local time format,
/// and `%c` the local format for date and time.
/// `%r` will use the local 12-hour clock format (e.g., 11:11:04 PM). Not all locales have such
/// a format, in which case we fall back to a 24-hour clock (`%X`).
///
/// See the [`format::strftime` module](crate::format::strftime) for all supported formatting
/// specifiers.
///
/// [`DateTime::format_localized_with_items`]: crate::DateTime::format_localized_with_items
///
/// # Errors
///
/// While iterating [`Item::Error`] will be returned if the format string contains an invalid
/// or unrecognized formatting specifier.
///
/// # Example
///
/// ```
/// # #[cfg(feature = "alloc")] {
/// use chrono::format::{Locale, StrftimeItems};
/// use chrono::{FixedOffset, TimeZone};
///
/// let dt = FixedOffset::east_opt(9 * 60 * 60)
/// .unwrap()
/// .with_ymd_and_hms(2023, 7, 11, 0, 34, 59)
/// .unwrap();
///
/// // Note: you usually want to combine `StrftimeItems::new_with_locale` with other
/// // locale-aware methods such as `DateTime::format_localized_with_items`.
/// // We use the regular `format_with_items` to show only how the formatting changes.
///
/// let fmtr = dt.format_with_items(StrftimeItems::new_with_locale("%x", Locale::en_US));
/// assert_eq!(fmtr.to_string(), "07/11/2023");
/// let fmtr = dt.format_with_items(StrftimeItems::new_with_locale("%x", Locale::ko_KR));
/// assert_eq!(fmtr.to_string(), "2023년 07월 11일");
/// let fmtr = dt.format_with_items(StrftimeItems::new_with_locale("%x", Locale::ja_JP));
/// assert_eq!(fmtr.to_string(), "2023年07月11日");
/// # }
/// ```
#[cfg(feature = "unstable-locales")]
#[must_use]
pub const fn new_with_locale(s: &'a str, locale: Locale) -> StrftimeItems<'a> {
StrftimeItems { remainder: s, queue: &[], locale_str: "", locale: Some(locale) }
}
/// Parse format string into a `Vec` of formatting [`Item`]'s.
///
/// If you need to format or parse multiple values with the same format string, it is more
/// efficient to convert it to a `Vec` of formatting [`Item`]'s than to re-parse the format
/// string on every use.
///
/// The `format_with_items` methods on [`DateTime`], [`NaiveDateTime`], [`NaiveDate`] and
/// [`NaiveTime`] accept the result for formatting. [`format::parse()`] can make use of it for
/// parsing.
///
/// [`DateTime`]: crate::DateTime::format_with_items
/// [`NaiveDateTime`]: crate::NaiveDateTime::format_with_items
/// [`NaiveDate`]: crate::NaiveDate::format_with_items
/// [`NaiveTime`]: crate::NaiveTime::format_with_items
/// [`format::parse()`]: crate::format::parse()
///
/// # Errors
///
/// Returns an error if the format string contains an invalid or unrecognized formatting
/// specifier.
///
/// # Example
///
/// ```
/// use chrono::format::{parse, Parsed, StrftimeItems};
/// use chrono::NaiveDate;
///
/// let fmt_items = StrftimeItems::new("%e %b %Y %k.%M").parse()?;
/// let datetime = NaiveDate::from_ymd_opt(2023, 7, 11).unwrap().and_hms_opt(9, 0, 0).unwrap();
///
/// // Formatting
/// assert_eq!(
/// datetime.format_with_items(fmt_items.as_slice().iter()).to_string(),
/// "11 Jul 2023 9.00"
/// );
///
/// // Parsing
/// let mut parsed = Parsed::new();
/// parse(&mut parsed, "11 Jul 2023 9.00", fmt_items.as_slice().iter())?;
/// let parsed_dt = parsed.to_naive_datetime_with_offset(0)?;
/// assert_eq!(parsed_dt, datetime);
/// # Ok::<(), chrono::ParseError>(())
/// ```
#[cfg(any(feature = "alloc", feature = "std"))]
pub fn parse(self) -> Result<Vec<Item<'a>>, ParseError> {
self.into_iter()
.map(|item| match item == Item::Error {
false => Ok(item),
true => Err(BAD_FORMAT),
})
.collect()
}
/// Parse format string into a `Vec` of [`Item`]'s that contain no references to slices of the
/// format string.
///
/// A `Vec` created with [`StrftimeItems::parse`] contains references to the format string,
/// binding the lifetime of the `Vec` to that string. [`StrftimeItems::parse_to_owned`] will
/// convert the references to owned types.
///
/// # Errors
///
/// Returns an error if the format string contains an invalid or unrecognized formatting
/// specifier.
///
/// # Example
///
/// ```
/// use chrono::format::{Item, ParseError, StrftimeItems};
/// use chrono::NaiveDate;
///
/// fn format_items(date_fmt: &str, time_fmt: &str) -> Result<Vec<Item<'static>>, ParseError> {
/// // `fmt_string` is dropped at the end of this function.
/// let fmt_string = format!("{} {}", date_fmt, time_fmt);
/// StrftimeItems::new(&fmt_string).parse_to_owned()
/// }
///
/// let fmt_items = format_items("%e %b %Y", "%k.%M")?;
/// let datetime = NaiveDate::from_ymd_opt(2023, 7, 11).unwrap().and_hms_opt(9, 0, 0).unwrap();
///
/// assert_eq!(
/// datetime.format_with_items(fmt_items.as_slice().iter()).to_string(),
/// "11 Jul 2023 9.00"
/// );
/// # Ok::<(), ParseError>(())
/// ```
#[cfg(any(feature = "alloc", feature = "std"))]
pub fn parse_to_owned(self) -> Result<Vec<Item<'static>>, ParseError> {
self.into_iter()
.map(|item| match item == Item::Error {
false => Ok(item.to_owned()),
true => Err(BAD_FORMAT),
})
.collect()
}
}
const HAVE_ALTERNATES: &str = "z";
impl<'a> Iterator for StrftimeItems<'a> {
type Item = Item<'a>;
fn next(&mut self) -> Option<Item<'a>> {
// We have items queued to return from a specifier composed of multiple formatting items.
if let Some((item, remainder)) = self.queue.split_first() {
self.queue = remainder;
return Some(item.clone());
}
// We are in the middle of parsing the localized formatting string of a specifier.
#[cfg(feature = "unstable-locales")]
if !self.locale_str.is_empty() {
let (remainder, item) = self.parse_next_item(self.locale_str)?;
self.locale_str = remainder;
return Some(item);
}
// Normal: we are parsing the formatting string.
let (remainder, item) = self.parse_next_item(self.remainder)?;
self.remainder = remainder;
Some(item)
}
}
impl<'a> StrftimeItems<'a> {
fn parse_next_item(&mut self, mut remainder: &'a str) -> Option<(&'a str, Item<'a>)> {
use InternalInternal::*;
use Item::{Literal, Space};
use Numeric::*;
static D_FMT: &[Item<'static>] =
&[num0(Month), Literal("/"), num0(Day), Literal("/"), num0(YearMod100)];
static D_T_FMT: &[Item<'static>] = &[
fixed(Fixed::ShortWeekdayName),
Space(" "),
fixed(Fixed::ShortMonthName),
Space(" "),
nums(Day),
Space(" "),
num0(Hour),
Literal(":"),
num0(Minute),
Literal(":"),
num0(Second),
Space(" "),
num0(Year),
];
static T_FMT: &[Item<'static>] =
&[num0(Hour), Literal(":"), num0(Minute), Literal(":"), num0(Second)];
static T_FMT_AMPM: &[Item<'static>] = &[
num0(Hour12),
Literal(":"),
num0(Minute),
Literal(":"),
num0(Second),
Space(" "),
fixed(Fixed::UpperAmPm),
];
match remainder.chars().next() {
// we are done
None => None,
// the next item is a specifier
Some('%') => {
remainder = &remainder[1..];
macro_rules! next {
() => {
match remainder.chars().next() {
Some(x) => {
remainder = &remainder[x.len_utf8()..];
x
}
None => return Some((remainder, Item::Error)), // premature end of string
}
};
}
let spec = next!();
let pad_override = match spec {
'-' => Some(Pad::None),
'0' => Some(Pad::Zero),
'_' => Some(Pad::Space),
_ => None,
};
let is_alternate = spec == '#';
let spec = if pad_override.is_some() || is_alternate { next!() } else { spec };
if is_alternate && !HAVE_ALTERNATES.contains(spec) {
return Some((remainder, Item::Error));
}
macro_rules! queue {
[$head:expr, $($tail:expr),+ $(,)*] => ({
const QUEUE: &'static [Item<'static>] = &[$($tail),+];
self.queue = QUEUE;
$head
})
}
#[cfg(not(feature = "unstable-locales"))]
macro_rules! queue_from_slice {
($slice:expr) => {{
self.queue = &$slice[1..];
$slice[0].clone()
}};
}
let item = match spec {
'A' => fixed(Fixed::LongWeekdayName),
'B' => fixed(Fixed::LongMonthName),
'C' => num0(YearDiv100),
'D' => {
queue![num0(Month), Literal("/"), num0(Day), Literal("/"), num0(YearMod100)]
}
'F' => queue![num0(Year), Literal("-"), num0(Month), Literal("-"), num0(Day)],
'G' => num0(IsoYear),
'H' => num0(Hour),
'I' => num0(Hour12),
'M' => num0(Minute),
'P' => fixed(Fixed::LowerAmPm),
'R' => queue![num0(Hour), Literal(":"), num0(Minute)],
'S' => num0(Second),
'T' => {
queue![num0(Hour), Literal(":"), num0(Minute), Literal(":"), num0(Second)]
}
'U' => num0(WeekFromSun),
'V' => num0(IsoWeek),
'W' => num0(WeekFromMon),
#[cfg(not(feature = "unstable-locales"))]
'X' => queue_from_slice!(T_FMT),
#[cfg(feature = "unstable-locales")]
'X' => self.switch_to_locale_str(locales::t_fmt, T_FMT),
'Y' => num0(Year),
'Z' => fixed(Fixed::TimezoneName),
'a' => fixed(Fixed::ShortWeekdayName),
'b' | 'h' => fixed(Fixed::ShortMonthName),
#[cfg(not(feature = "unstable-locales"))]
'c' => queue_from_slice!(D_T_FMT),
#[cfg(feature = "unstable-locales")]
'c' => self.switch_to_locale_str(locales::d_t_fmt, D_T_FMT),
'd' => num0(Day),
'e' => nums(Day),
'f' => num0(Nanosecond),
'g' => num0(IsoYearMod100),
'j' => num0(Ordinal),
'k' => nums(Hour),
'l' => nums(Hour12),
'm' => num0(Month),
'n' => Space("\n"),
'p' => fixed(Fixed::UpperAmPm),
#[cfg(not(feature = "unstable-locales"))]
'r' => queue_from_slice!(T_FMT_AMPM),
#[cfg(feature = "unstable-locales")]
'r' => {
if self.locale.is_some()
&& locales::t_fmt_ampm(self.locale.unwrap()).is_empty()
{
// 12-hour clock not supported by this locale. Switch to 24-hour format.
self.switch_to_locale_str(locales::t_fmt, T_FMT)
} else {
self.switch_to_locale_str(locales::t_fmt_ampm, T_FMT_AMPM)
}
}
's' => num(Timestamp),
't' => Space("\t"),
'u' => num(WeekdayFromMon),
'v' => {
queue![
nums(Day),
Literal("-"),
fixed(Fixed::ShortMonthName),
Literal("-"),
num0(Year)
]
}
'w' => num(NumDaysFromSun),
#[cfg(not(feature = "unstable-locales"))]
'x' => queue_from_slice!(D_FMT),
#[cfg(feature = "unstable-locales")]
'x' => self.switch_to_locale_str(locales::d_fmt, D_FMT),
'y' => num0(YearMod100),
'z' => {
if is_alternate {
internal_fixed(TimezoneOffsetPermissive)
} else {
fixed(Fixed::TimezoneOffset)
}
}
'+' => fixed(Fixed::RFC3339),
':' => {
if remainder.starts_with("::z") {
remainder = &remainder[3..];
fixed(Fixed::TimezoneOffsetTripleColon)
} else if remainder.starts_with(":z") {
remainder = &remainder[2..];
fixed(Fixed::TimezoneOffsetDoubleColon)
} else if remainder.starts_with('z') {
remainder = &remainder[1..];
fixed(Fixed::TimezoneOffsetColon)
} else {
Item::Error
}
}
'.' => match next!() {
'3' => match next!() {
'f' => fixed(Fixed::Nanosecond3),
_ => Item::Error,
},
'6' => match next!() {
'f' => fixed(Fixed::Nanosecond6),
_ => Item::Error,
},
'9' => match next!() {
'f' => fixed(Fixed::Nanosecond9),
_ => Item::Error,
},
'f' => fixed(Fixed::Nanosecond),
_ => Item::Error,
},
'3' => match next!() {
'f' => internal_fixed(Nanosecond3NoDot),
_ => Item::Error,
},
'6' => match next!() {
'f' => internal_fixed(Nanosecond6NoDot),
_ => Item::Error,
},
'9' => match next!() {
'f' => internal_fixed(Nanosecond9NoDot),
_ => Item::Error,
},
'%' => Literal("%"),
_ => Item::Error, // no such specifier
};
// Adjust `item` if we have any padding modifier.
// Not allowed on non-numeric items or on specifiers composed out of multiple
// formatting items.
if let Some(new_pad) = pad_override {
match item {
Item::Numeric(ref kind, _pad) if self.queue.is_empty() => {
Some((remainder, Item::Numeric(kind.clone(), new_pad)))
}
_ => Some((remainder, Item::Error)),
}
} else {
Some((remainder, item))
}
}
// the next item is space
Some(c) if c.is_whitespace() => {
// `%` is not a whitespace, so `c != '%'` is redundant
let nextspec =
remainder.find(|c: char| !c.is_whitespace()).unwrap_or(remainder.len());
assert!(nextspec > 0);
let item = Space(&remainder[..nextspec]);
remainder = &remainder[nextspec..];
Some((remainder, item))
}
// the next item is literal
_ => {
let nextspec = remainder
.find(|c: char| c.is_whitespace() || c == '%')
.unwrap_or(remainder.len());
assert!(nextspec > 0);
let item = Literal(&remainder[..nextspec]);
remainder = &remainder[nextspec..];
Some((remainder, item))
}
}
}
#[cfg(feature = "unstable-locales")]
fn switch_to_locale_str(
&mut self,
localized_fmt_str: impl Fn(Locale) -> &'static str,
fallback: &'static [Item<'static>],
) -> Item<'a> {
if let Some(locale) = self.locale {
assert!(self.locale_str.is_empty());
let (fmt_str, item) = self.parse_next_item(localized_fmt_str(locale)).unwrap();
self.locale_str = fmt_str;
item
} else {
self.queue = &fallback[1..];
fallback[0].clone()
}
}
}
#[cfg(test)]
mod tests {
use super::StrftimeItems;
use crate::format::Item::{self, Literal, Space};
#[cfg(feature = "unstable-locales")]
use crate::format::Locale;
use crate::format::{fixed, internal_fixed, num, num0, nums};
use crate::format::{Fixed, InternalInternal, Numeric::*};
#[cfg(feature = "alloc")]
use crate::{DateTime, FixedOffset, NaiveDate, TimeZone, Timelike, Utc};
#[test]
fn test_strftime_items() {
fn parse_and_collect(s: &str) -> Vec<Item<'_>> {
// map any error into `[Item::Error]`. useful for easy testing.
eprintln!("test_strftime_items: parse_and_collect({:?})", s);
let items = StrftimeItems::new(s);
let items = items.map(|spec| if spec == Item::Error { None } else { Some(spec) });
items.collect::<Option<Vec<_>>>().unwrap_or_else(|| vec![Item::Error])
}
assert_eq!(parse_and_collect(""), []);
assert_eq!(parse_and_collect(" "), [Space(" ")]);
assert_eq!(parse_and_collect(" "), [Space(" ")]);
// ne!
assert_ne!(parse_and_collect(" "), [Space(" "), Space(" ")]);
// eq!
assert_eq!(parse_and_collect(" "), [Space(" ")]);
assert_eq!(parse_and_collect("a"), [Literal("a")]);
assert_eq!(parse_and_collect("ab"), [Literal("ab")]);
assert_eq!(parse_and_collect("😽"), [Literal("😽")]);
assert_eq!(parse_and_collect("a😽"), [Literal("a😽")]);
assert_eq!(parse_and_collect("😽a"), [Literal("😽a")]);
assert_eq!(parse_and_collect(" 😽"), [Space(" "), Literal("😽")]);
assert_eq!(parse_and_collect("😽 "), [Literal("😽"), Space(" ")]);
// ne!
assert_ne!(parse_and_collect("😽😽"), [Literal("😽")]);
assert_ne!(parse_and_collect("😽"), [Literal("😽😽")]);
assert_ne!(parse_and_collect("😽😽"), [Literal("😽😽"), Literal("😽")]);
// eq!
assert_eq!(parse_and_collect("😽😽"), [Literal("😽😽")]);
assert_eq!(parse_and_collect(" \t\n\r "), [Space(" \t\n\r ")]);
assert_eq!(parse_and_collect("hello?"), [Literal("hello?")]);
assert_eq!(
parse_and_collect("a b\t\nc"),
[Literal("a"), Space(" "), Literal("b"), Space("\t\n"), Literal("c")]
);
assert_eq!(parse_and_collect("100%%"), [Literal("100"), Literal("%")]);
assert_eq!(
parse_and_collect("100%% ok"),
[Literal("100"), Literal("%"), Space(" "), Literal("ok")]
);
assert_eq!(parse_and_collect("%%PDF-1.0"), [Literal("%"), Literal("PDF-1.0")]);
assert_eq!(
parse_and_collect("%Y-%m-%d"),
[num0(Year), Literal("-"), num0(Month), Literal("-"), num0(Day)]
);
assert_eq!(parse_and_collect("😽 "), [Literal("😽"), Space(" ")]);
assert_eq!(parse_and_collect("😽😽"), [Literal("😽😽")]);
assert_eq!(parse_and_collect("😽😽😽"), [Literal("😽😽😽")]);
assert_eq!(parse_and_collect("😽😽 😽"), [Literal("😽😽"), Space(" "), Literal("😽")]);
assert_eq!(parse_and_collect("😽😽a 😽"), [Literal("😽😽a"), Space(" "), Literal("😽")]);
assert_eq!(parse_and_collect("😽😽a b😽"), [Literal("😽😽a"), Space(" "), Literal("b😽")]);
assert_eq!(
parse_and_collect("😽😽a b😽c"),
[Literal("😽😽a"), Space(" "), Literal("b😽c")]
);
assert_eq!(parse_and_collect("😽😽 "), [Literal("😽😽"), Space(" ")]);
assert_eq!(parse_and_collect("😽😽 😽"), [Literal("😽😽"), Space(" "), Literal("😽")]);
assert_eq!(parse_and_collect(" 😽"), [Space(" "), Literal("😽")]);
assert_eq!(parse_and_collect(" 😽 "), [Space(" "), Literal("😽"), Space(" ")]);
assert_eq!(
parse_and_collect(" 😽 😽"),
[Space(" "), Literal("😽"), Space(" "), Literal("😽")]
);
assert_eq!(
parse_and_collect(" 😽 😽 "),
[Space(" "), Literal("😽"), Space(" "), Literal("😽"), Space(" ")]
);
assert_eq!(
parse_and_collect(" 😽 😽 "),
[Space(" "), Literal("😽"), Space(" "), Literal("😽"), Space(" ")]
);
assert_eq!(
parse_and_collect(" 😽 😽😽 "),
[Space(" "), Literal("😽"), Space(" "), Literal("😽😽"), Space(" ")]
);
assert_eq!(parse_and_collect(" 😽😽"), [Space(" "), Literal("😽😽")]);
assert_eq!(parse_and_collect(" 😽😽 "), [Space(" "), Literal("😽😽"), Space(" ")]);
assert_eq!(
parse_and_collect(" 😽😽 "),
[Space(" "), Literal("😽😽"), Space(" ")]
);
assert_eq!(
parse_and_collect(" 😽😽 "),
[Space(" "), Literal("😽😽"), Space(" ")]
);
assert_eq!(parse_and_collect(" 😽😽 "), [Space(" "), Literal("😽😽"), Space(" ")]);
assert_eq!(
parse_and_collect(" 😽 😽😽 "),
[Space(" "), Literal("😽"), Space(" "), Literal("😽😽"), Space(" ")]
);
assert_eq!(
parse_and_collect(" 😽 😽はい😽 ハンバーガー"),
[
Space(" "),
Literal("😽"),
Space(" "),
Literal("😽はい😽"),
Space(" "),
Literal("ハンバーガー")
]
);
assert_eq!(
parse_and_collect("%%😽%%😽"),
[Literal("%"), Literal("😽"), Literal("%"), Literal("😽")]
);
assert_eq!(parse_and_collect("%Y--%m"), [num0(Year), Literal("--"), num0(Month)]);
assert_eq!(parse_and_collect("[%F]"), parse_and_collect("[%Y-%m-%d]"));
assert_eq!(parse_and_collect("100%%😽"), [Literal("100"), Literal("%"), Literal("😽")]);
assert_eq!(
parse_and_collect("100%%😽%%a"),
[Literal("100"), Literal("%"), Literal("😽"), Literal("%"), Literal("a")]
);
assert_eq!(parse_and_collect("😽100%%"), [Literal("😽100"), Literal("%")]);
assert_eq!(parse_and_collect("%m %d"), [num0(Month), Space(" "), num0(Day)]);
assert_eq!(parse_and_collect("%"), [Item::Error]);
assert_eq!(parse_and_collect("%%"), [Literal("%")]);
assert_eq!(parse_and_collect("%%%"), [Item::Error]);
assert_eq!(parse_and_collect("%a"), [fixed(Fixed::ShortWeekdayName)]);
assert_eq!(parse_and_collect("%aa"), [fixed(Fixed::ShortWeekdayName), Literal("a")]);
assert_eq!(parse_and_collect("%%a%"), [Item::Error]);
assert_eq!(parse_and_collect("%😽"), [Item::Error]);
assert_eq!(parse_and_collect("%😽😽"), [Item::Error]);
assert_eq!(parse_and_collect("%%%%"), [Literal("%"), Literal("%")]);
assert_eq!(
parse_and_collect("%%%%ハンバーガー"),
[Literal("%"), Literal("%"), Literal("ハンバーガー")]
);
assert_eq!(parse_and_collect("foo%?"), [Item::Error]);
assert_eq!(parse_and_collect("bar%42"), [Item::Error]);
assert_eq!(parse_and_collect("quux% +"), [Item::Error]);
assert_eq!(parse_and_collect("%.Z"), [Item::Error]);
assert_eq!(parse_and_collect("%:Z"), [Item::Error]);
assert_eq!(parse_and_collect("%-Z"), [Item::Error]);
assert_eq!(parse_and_collect("%0Z"), [Item::Error]);
assert_eq!(parse_and_collect("%_Z"), [Item::Error]);
assert_eq!(parse_and_collect("%.j"), [Item::Error]);
assert_eq!(parse_and_collect("%:j"), [Item::Error]);
assert_eq!(parse_and_collect("%-j"), [num(Ordinal)]);
assert_eq!(parse_and_collect("%0j"), [num0(Ordinal)]);
assert_eq!(parse_and_collect("%_j"), [nums(Ordinal)]);
assert_eq!(parse_and_collect("%.e"), [Item::Error]);
assert_eq!(parse_and_collect("%:e"), [Item::Error]);
assert_eq!(parse_and_collect("%-e"), [num(Day)]);
assert_eq!(parse_and_collect("%0e"), [num0(Day)]);
assert_eq!(parse_and_collect("%_e"), [nums(Day)]);
assert_eq!(parse_and_collect("%z"), [fixed(Fixed::TimezoneOffset)]);
assert_eq!(parse_and_collect("%:z"), [fixed(Fixed::TimezoneOffsetColon)]);
assert_eq!(parse_and_collect("%Z"), [fixed(Fixed::TimezoneName)]);
assert_eq!(parse_and_collect("%ZZZZ"), [fixed(Fixed::TimezoneName), Literal("ZZZ")]);
assert_eq!(parse_and_collect("%Z😽"), [fixed(Fixed::TimezoneName), Literal("😽")]);
assert_eq!(
parse_and_collect("%#z"),
[internal_fixed(InternalInternal::TimezoneOffsetPermissive)]
);
assert_eq!(parse_and_collect("%#m"), [Item::Error]);
}
#[test]
#[cfg(feature = "alloc")]
fn test_strftime_docs() {
let dt = FixedOffset::east_opt(34200)
.unwrap()
.from_local_datetime(
&NaiveDate::from_ymd_opt(2001, 7, 8)
.unwrap()
.and_hms_nano_opt(0, 34, 59, 1_026_490_708)
.unwrap(),
)
.unwrap();
// date specifiers
assert_eq!(dt.format("%Y").to_string(), "2001");
assert_eq!(dt.format("%C").to_string(), "20");
assert_eq!(dt.format("%y").to_string(), "01");
assert_eq!(dt.format("%m").to_string(), "07");
assert_eq!(dt.format("%b").to_string(), "Jul");
assert_eq!(dt.format("%B").to_string(), "July");
assert_eq!(dt.format("%h").to_string(), "Jul");
assert_eq!(dt.format("%d").to_string(), "08");
assert_eq!(dt.format("%e").to_string(), " 8");
assert_eq!(dt.format("%e").to_string(), dt.format("%_d").to_string());
assert_eq!(dt.format("%a").to_string(), "Sun");
assert_eq!(dt.format("%A").to_string(), "Sunday");
assert_eq!(dt.format("%w").to_string(), "0");
assert_eq!(dt.format("%u").to_string(), "7");
assert_eq!(dt.format("%U").to_string(), "27");
assert_eq!(dt.format("%W").to_string(), "27");
assert_eq!(dt.format("%G").to_string(), "2001");
assert_eq!(dt.format("%g").to_string(), "01");
assert_eq!(dt.format("%V").to_string(), "27");
assert_eq!(dt.format("%j").to_string(), "189");
assert_eq!(dt.format("%D").to_string(), "07/08/01");
assert_eq!(dt.format("%x").to_string(), "07/08/01");
assert_eq!(dt.format("%F").to_string(), "2001-07-08");
assert_eq!(dt.format("%v").to_string(), " 8-Jul-2001");
// time specifiers
assert_eq!(dt.format("%H").to_string(), "00");
assert_eq!(dt.format("%k").to_string(), " 0");
assert_eq!(dt.format("%k").to_string(), dt.format("%_H").to_string());
assert_eq!(dt.format("%I").to_string(), "12");
assert_eq!(dt.format("%l").to_string(), "12");
assert_eq!(dt.format("%l").to_string(), dt.format("%_I").to_string());
assert_eq!(dt.format("%P").to_string(), "am");
assert_eq!(dt.format("%p").to_string(), "AM");
assert_eq!(dt.format("%M").to_string(), "34");
assert_eq!(dt.format("%S").to_string(), "60");
assert_eq!(dt.format("%f").to_string(), "026490708");
assert_eq!(dt.format("%.f").to_string(), ".026490708");
assert_eq!(dt.with_nanosecond(1_026_490_000).unwrap().format("%.f").to_string(), ".026490");
assert_eq!(dt.format("%.3f").to_string(), ".026");
assert_eq!(dt.format("%.6f").to_string(), ".026490");
assert_eq!(dt.format("%.9f").to_string(), ".026490708");
assert_eq!(dt.format("%3f").to_string(), "026");
assert_eq!(dt.format("%6f").to_string(), "026490");
assert_eq!(dt.format("%9f").to_string(), "026490708");
assert_eq!(dt.format("%R").to_string(), "00:34");
assert_eq!(dt.format("%T").to_string(), "00:34:60");
assert_eq!(dt.format("%X").to_string(), "00:34:60");
assert_eq!(dt.format("%r").to_string(), "12:34:60 AM");
// time zone specifiers
//assert_eq!(dt.format("%Z").to_string(), "ACST");
assert_eq!(dt.format("%z").to_string(), "+0930");
assert_eq!(dt.format("%:z").to_string(), "+09:30");
assert_eq!(dt.format("%::z").to_string(), "+09:30:00");
assert_eq!(dt.format("%:::z").to_string(), "+09");
// date & time specifiers
assert_eq!(dt.format("%c").to_string(), "Sun Jul 8 00:34:60 2001");
assert_eq!(dt.format("%+").to_string(), "2001-07-08T00:34:60.026490708+09:30");
assert_eq!(
dt.with_timezone(&Utc).format("%+").to_string(),
"2001-07-07T15:04:60.026490708+00:00"
);
assert_eq!(
dt.with_timezone(&Utc),
DateTime::parse_from_str("2001-07-07T15:04:60.026490708Z", "%+").unwrap()
);
assert_eq!(
dt.with_timezone(&Utc),
DateTime::parse_from_str("2001-07-07T15:04:60.026490708UTC", "%+").unwrap()
);
assert_eq!(
dt.with_timezone(&Utc),
DateTime::parse_from_str("2001-07-07t15:04:60.026490708utc", "%+").unwrap()
);
assert_eq!(
dt.with_nanosecond(1_026_490_000).unwrap().format("%+").to_string(),
"2001-07-08T00:34:60.026490+09:30"
);
assert_eq!(dt.format("%s").to_string(), "994518299");
// special specifiers
assert_eq!(dt.format("%t").to_string(), "\t");
assert_eq!(dt.format("%n").to_string(), "\n");
assert_eq!(dt.format("%%").to_string(), "%");
// complex format specifiers
assert_eq!(dt.format(" %Y%d%m%%%%%t%H%M%S\t").to_string(), " 20010807%%\t003460\t");
assert_eq!(
dt.format(" %Y%d%m%%%%%t%H:%P:%M%S%:::z\t").to_string(),
" 20010807%%\t00:am:3460+09\t"
);
}
#[test]
#[cfg(all(feature = "unstable-locales", feature = "alloc"))]
fn test_strftime_docs_localized() {
let dt = FixedOffset::east_opt(34200)
.unwrap()
.with_ymd_and_hms(2001, 7, 8, 0, 34, 59)
.unwrap()
.with_nanosecond(1_026_490_708)
.unwrap();
// date specifiers
assert_eq!(dt.format_localized("%b", Locale::fr_BE).to_string(), "jui");
assert_eq!(dt.format_localized("%B", Locale::fr_BE).to_string(), "juillet");
assert_eq!(dt.format_localized("%h", Locale::fr_BE).to_string(), "jui");
assert_eq!(dt.format_localized("%a", Locale::fr_BE).to_string(), "dim");
assert_eq!(dt.format_localized("%A", Locale::fr_BE).to_string(), "dimanche");
assert_eq!(dt.format_localized("%D", Locale::fr_BE).to_string(), "07/08/01");
assert_eq!(dt.format_localized("%x", Locale::fr_BE).to_string(), "08/07/01");
assert_eq!(dt.format_localized("%F", Locale::fr_BE).to_string(), "2001-07-08");
assert_eq!(dt.format_localized("%v", Locale::fr_BE).to_string(), " 8-jui-2001");
// time specifiers
assert_eq!(dt.format_localized("%P", Locale::fr_BE).to_string(), "");
assert_eq!(dt.format_localized("%p", Locale::fr_BE).to_string(), "");
assert_eq!(dt.format_localized("%R", Locale::fr_BE).to_string(), "00:34");
assert_eq!(dt.format_localized("%T", Locale::fr_BE).to_string(), "00:34:60");
assert_eq!(dt.format_localized("%X", Locale::fr_BE).to_string(), "00:34:60");
assert_eq!(dt.format_localized("%r", Locale::fr_BE).to_string(), "00:34:60");
// date & time specifiers
assert_eq!(
dt.format_localized("%c", Locale::fr_BE).to_string(),
"dim 08 jui 2001 00:34:60 +09:30"
);
let nd = NaiveDate::from_ymd_opt(2001, 7, 8).unwrap();
// date specifiers
assert_eq!(nd.format_localized("%b", Locale::de_DE).to_string(), "Jul");
assert_eq!(nd.format_localized("%B", Locale::de_DE).to_string(), "Juli");
assert_eq!(nd.format_localized("%h", Locale::de_DE).to_string(), "Jul");
assert_eq!(nd.format_localized("%a", Locale::de_DE).to_string(), "So");
assert_eq!(nd.format_localized("%A", Locale::de_DE).to_string(), "Sonntag");
assert_eq!(nd.format_localized("%D", Locale::de_DE).to_string(), "07/08/01");
assert_eq!(nd.format_localized("%x", Locale::de_DE).to_string(), "08.07.2001");
assert_eq!(nd.format_localized("%F", Locale::de_DE).to_string(), "2001-07-08");
assert_eq!(nd.format_localized("%v", Locale::de_DE).to_string(), " 8-Jul-2001");
}
/// Ensure parsing a timestamp with the parse-only stftime formatter "%#z" does
/// not cause a panic.
///
/// See <https://github.com/chronotope/chrono/issues/1139>.
#[test]
#[cfg(feature = "alloc")]
fn test_parse_only_timezone_offset_permissive_no_panic() {
use crate::NaiveDate;
use crate::{FixedOffset, TimeZone};
use std::fmt::Write;
let dt = FixedOffset::east_opt(34200)
.unwrap()
.from_local_datetime(
&NaiveDate::from_ymd_opt(2001, 7, 8)
.unwrap()
.and_hms_nano_opt(0, 34, 59, 1_026_490_708)
.unwrap(),
)
.unwrap();
let mut buf = String::new();
let _ = write!(buf, "{}", dt.format("%#z")).expect_err("parse-only formatter should fail");
}
#[test]
#[cfg(all(feature = "unstable-locales", feature = "alloc"))]
fn test_strftime_localized_korean() {
let dt = FixedOffset::east_opt(34200)
.unwrap()
.with_ymd_and_hms(2001, 7, 8, 0, 34, 59)
.unwrap()
.with_nanosecond(1_026_490_708)
.unwrap();
// date specifiers
assert_eq!(dt.format_localized("%b", Locale::ko_KR).to_string(), " 7월");
assert_eq!(dt.format_localized("%B", Locale::ko_KR).to_string(), "7월");
assert_eq!(dt.format_localized("%h", Locale::ko_KR).to_string(), " 7월");
assert_eq!(dt.format_localized("%a", Locale::ko_KR).to_string(), "일");
assert_eq!(dt.format_localized("%A", Locale::ko_KR).to_string(), "일요일");
assert_eq!(dt.format_localized("%D", Locale::ko_KR).to_string(), "07/08/01");
assert_eq!(dt.format_localized("%x", Locale::ko_KR).to_string(), "2001년 07월 08일");
assert_eq!(dt.format_localized("%F", Locale::ko_KR).to_string(), "2001-07-08");
assert_eq!(dt.format_localized("%v", Locale::ko_KR).to_string(), " 8- 7월-2001");
assert_eq!(dt.format_localized("%r", Locale::ko_KR).to_string(), "오전 12시 34분 60초");
// date & time specifiers
assert_eq!(
dt.format_localized("%c", Locale::ko_KR).to_string(),
"2001년 07월 08일 (일) 오전 12시 34분 60초"
);
}
#[test]
#[cfg(all(feature = "unstable-locales", feature = "alloc"))]
fn test_strftime_localized_japanese() {
let dt = FixedOffset::east_opt(34200)
.unwrap()
.with_ymd_and_hms(2001, 7, 8, 0, 34, 59)
.unwrap()
.with_nanosecond(1_026_490_708)
.unwrap();
// date specifiers
assert_eq!(dt.format_localized("%b", Locale::ja_JP).to_string(), " 7月");
assert_eq!(dt.format_localized("%B", Locale::ja_JP).to_string(), "7月");
assert_eq!(dt.format_localized("%h", Locale::ja_JP).to_string(), " 7月");
assert_eq!(dt.format_localized("%a", Locale::ja_JP).to_string(), "日");
assert_eq!(dt.format_localized("%A", Locale::ja_JP).to_string(), "日曜日");
assert_eq!(dt.format_localized("%D", Locale::ja_JP).to_string(), "07/08/01");
assert_eq!(dt.format_localized("%x", Locale::ja_JP).to_string(), "2001年07月08日");
assert_eq!(dt.format_localized("%F", Locale::ja_JP).to_string(), "2001-07-08");
assert_eq!(dt.format_localized("%v", Locale::ja_JP).to_string(), " 8- 7月-2001");
assert_eq!(dt.format_localized("%r", Locale::ja_JP).to_string(), "午前12時34分60秒");
// date & time specifiers
assert_eq!(
dt.format_localized("%c", Locale::ja_JP).to_string(),
"2001年07月08日 00時34分60秒"
);
}
#[test]
#[cfg(all(feature = "unstable-locales", feature = "alloc"))]
fn test_strftime_localized_time() {
let dt1 = Utc.with_ymd_and_hms(2024, 2, 9, 6, 54, 32).unwrap();
let dt2 = Utc.with_ymd_and_hms(2024, 2, 9, 18, 54, 32).unwrap();
// Some of these locales gave issues before pure-rust-locales 0.8.0 with chrono 0.4.27+
assert_eq!(dt1.format_localized("%X", Locale::nl_NL).to_string(), "06:54:32");
assert_eq!(dt2.format_localized("%X", Locale::nl_NL).to_string(), "18:54:32");
assert_eq!(dt1.format_localized("%X", Locale::en_US).to_string(), "06:54:32 AM");
assert_eq!(dt2.format_localized("%X", Locale::en_US).to_string(), "06:54:32 PM");
assert_eq!(dt1.format_localized("%X", Locale::hy_AM).to_string(), "06:54:32");
assert_eq!(dt2.format_localized("%X", Locale::hy_AM).to_string(), "18:54:32");
assert_eq!(dt1.format_localized("%X", Locale::chr_US).to_string(), "06:54:32 ᏌᎾᎴ");
assert_eq!(dt2.format_localized("%X", Locale::chr_US).to_string(), "06:54:32 ᏒᎯᏱᎢᏗᏢ");
}
#[test]
#[cfg(all(feature = "unstable-locales", target_pointer_width = "64"))]
fn test_type_sizes() {
use core::mem::size_of;
assert_eq!(size_of::<Item>(), 24);
assert_eq!(size_of::<StrftimeItems>(), 56);
assert_eq!(size_of::<Locale>(), 2);
}
#[test]
#[cfg(all(feature = "unstable-locales", target_pointer_width = "32"))]
fn test_type_sizes() {
use core::mem::size_of;
assert_eq!(size_of::<Item>(), 12);
assert_eq!(size_of::<StrftimeItems>(), 28);
assert_eq!(size_of::<Locale>(), 2);
}
#[test]
#[cfg(any(feature = "alloc", feature = "std"))]
fn test_strftime_parse() {
let fmt_str = StrftimeItems::new("%Y-%m-%dT%H:%M:%S%z");
let fmt_items = fmt_str.parse().unwrap();
let dt = Utc.with_ymd_and_hms(2014, 5, 7, 12, 34, 56).unwrap();
assert_eq!(&dt.format_with_items(fmt_items.iter()).to_string(), "2014-05-07T12:34:56+0000");
}
}