1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135
// 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");
}
}