diff options
Diffstat (limited to 'vendor/time/src/format_description')
| -rw-r--r-- | vendor/time/src/format_description/borrowed_format_item.rs | 106 | ||||
| -rw-r--r-- | vendor/time/src/format_description/component.rs | 44 | ||||
| -rw-r--r-- | vendor/time/src/format_description/mod.rs | 41 | ||||
| -rw-r--r-- | vendor/time/src/format_description/modifier.rs | 434 | ||||
| -rw-r--r-- | vendor/time/src/format_description/owned_format_item.rs | 158 | ||||
| -rw-r--r-- | vendor/time/src/format_description/parse/ast.rs | 384 | ||||
| -rw-r--r-- | vendor/time/src/format_description/parse/format_item.rs | 549 | ||||
| -rw-r--r-- | vendor/time/src/format_description/parse/lexer.rs | 284 | ||||
| -rw-r--r-- | vendor/time/src/format_description/parse/mod.rs | 262 | ||||
| -rw-r--r-- | vendor/time/src/format_description/parse/strftime.rs | 487 | ||||
| -rw-r--r-- | vendor/time/src/format_description/well_known/iso8601.rs | 257 | ||||
| -rw-r--r-- | vendor/time/src/format_description/well_known/iso8601/adt_hack.rs | 247 | ||||
| -rw-r--r-- | vendor/time/src/format_description/well_known/rfc2822.rs | 30 | ||||
| -rw-r--r-- | vendor/time/src/format_description/well_known/rfc3339.rs | 30 |
14 files changed, 3313 insertions, 0 deletions
diff --git a/vendor/time/src/format_description/borrowed_format_item.rs b/vendor/time/src/format_description/borrowed_format_item.rs new file mode 100644 index 00000000..2e97efd4 --- /dev/null +++ b/vendor/time/src/format_description/borrowed_format_item.rs @@ -0,0 +1,106 @@ +//! A format item with borrowed data. + +#[cfg(feature = "alloc")] +use alloc::string::String; +#[cfg(feature = "alloc")] +use core::fmt; + +use crate::error; +use crate::format_description::Component; + +/// A complete description of how to format and parse a type. +#[non_exhaustive] +#[cfg_attr(not(feature = "alloc"), derive(Debug))] +#[derive(Clone, PartialEq, Eq)] +pub enum BorrowedFormatItem<'a> { + /// Bytes that are formatted as-is. + /// + /// **Note**: These bytes **should** be UTF-8, but are not required to be. The value is passed + /// through `String::from_utf8_lossy` when necessary. + Literal(&'a [u8]), + /// A minimal representation of a single non-literal item. + Component(Component), + /// A series of literals or components that collectively form a partial or complete + /// description. + Compound(&'a [Self]), + /// A `FormatItem` that may or may not be present when parsing. If parsing fails, there + /// will be no effect on the resulting `struct`. + /// + /// This variant has no effect on formatting, as the value is guaranteed to be present. + Optional(&'a Self), + /// A series of `FormatItem`s where, when parsing, the first successful parse is used. When + /// formatting, the first element of the slice is used. An empty slice is a no-op when + /// formatting or parsing. + First(&'a [Self]), +} + +#[cfg(feature = "alloc")] +impl fmt::Debug for BorrowedFormatItem<'_> { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + match self { + Self::Literal(literal) => f.write_str(&String::from_utf8_lossy(literal)), + Self::Component(component) => component.fmt(f), + Self::Compound(compound) => compound.fmt(f), + Self::Optional(item) => f.debug_tuple("Optional").field(item).finish(), + Self::First(items) => f.debug_tuple("First").field(items).finish(), + } + } +} + +impl From<Component> for BorrowedFormatItem<'_> { + fn from(component: Component) -> Self { + Self::Component(component) + } +} + +impl TryFrom<BorrowedFormatItem<'_>> for Component { + type Error = error::DifferentVariant; + + fn try_from(value: BorrowedFormatItem<'_>) -> Result<Self, Self::Error> { + match value { + BorrowedFormatItem::Component(component) => Ok(component), + _ => Err(error::DifferentVariant), + } + } +} + +impl<'a> From<&'a [BorrowedFormatItem<'_>]> for BorrowedFormatItem<'a> { + fn from(items: &'a [BorrowedFormatItem<'_>]) -> Self { + Self::Compound(items) + } +} + +impl<'a> TryFrom<BorrowedFormatItem<'a>> for &[BorrowedFormatItem<'a>] { + type Error = error::DifferentVariant; + + fn try_from(value: BorrowedFormatItem<'a>) -> Result<Self, Self::Error> { + match value { + BorrowedFormatItem::Compound(items) => Ok(items), + _ => Err(error::DifferentVariant), + } + } +} + +impl PartialEq<Component> for BorrowedFormatItem<'_> { + fn eq(&self, rhs: &Component) -> bool { + matches!(self, Self::Component(component) if component == rhs) + } +} + +impl PartialEq<BorrowedFormatItem<'_>> for Component { + fn eq(&self, rhs: &BorrowedFormatItem<'_>) -> bool { + rhs == self + } +} + +impl PartialEq<&[Self]> for BorrowedFormatItem<'_> { + fn eq(&self, rhs: &&[Self]) -> bool { + matches!(self, Self::Compound(compound) if compound == rhs) + } +} + +impl PartialEq<BorrowedFormatItem<'_>> for &[BorrowedFormatItem<'_>] { + fn eq(&self, rhs: &BorrowedFormatItem<'_>) -> bool { + rhs == self + } +} diff --git a/vendor/time/src/format_description/component.rs b/vendor/time/src/format_description/component.rs new file mode 100644 index 00000000..9119c090 --- /dev/null +++ b/vendor/time/src/format_description/component.rs @@ -0,0 +1,44 @@ +//! Part of a format description. + +use crate::format_description::modifier; + +/// A component of a larger format description. +#[non_exhaustive] +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub enum Component { + /// Day of the month. + Day(modifier::Day), + /// Month of the year. + Month(modifier::Month), + /// Ordinal day of the year. + Ordinal(modifier::Ordinal), + /// Day of the week. + Weekday(modifier::Weekday), + /// Week within the year. + WeekNumber(modifier::WeekNumber), + /// Year of the date. + Year(modifier::Year), + /// Hour of the day. + Hour(modifier::Hour), + /// Minute within the hour. + Minute(modifier::Minute), + /// AM/PM part of the time. + Period(modifier::Period), + /// Second within the minute. + Second(modifier::Second), + /// Subsecond within the second. + Subsecond(modifier::Subsecond), + /// Hour of the UTC offset. + OffsetHour(modifier::OffsetHour), + /// Minute within the hour of the UTC offset. + OffsetMinute(modifier::OffsetMinute), + /// Second within the minute of the UTC offset. + OffsetSecond(modifier::OffsetSecond), + /// A number of bytes to ignore when parsing. This has no effect on formatting. + Ignore(modifier::Ignore), + /// A Unix timestamp. + UnixTimestamp(modifier::UnixTimestamp), + /// The end of input. Parsing this component will fail if there is any input remaining. This + /// component neither affects formatting nor consumes any input when parsing. + End(modifier::End), +} diff --git a/vendor/time/src/format_description/mod.rs b/vendor/time/src/format_description/mod.rs new file mode 100644 index 00000000..9e7d5202 --- /dev/null +++ b/vendor/time/src/format_description/mod.rs @@ -0,0 +1,41 @@ +//! Description of how types should be formatted and parsed. +//! +//! The formatted value will be output to the provided writer. Format descriptions can be +//! [well-known](crate::format_description::well_known) or obtained by using the +//! [`format_description!`](crate::macros::format_description) macro or a function listed below. +//! +//! For examples, see the implementors of [Formattable](crate::formatting::Formattable), +//! e.g. [`well_known::Rfc3339`]. + +mod borrowed_format_item; +mod component; +pub mod modifier; +#[cfg(feature = "alloc")] +mod owned_format_item; +#[cfg(feature = "alloc")] +mod parse; + +pub use borrowed_format_item::BorrowedFormatItem; +#[doc(hidden)] +#[deprecated(since = "0.3.37", note = "use `BorrowedFormatItem` for clarity")] +pub use borrowed_format_item::BorrowedFormatItem as FormatItem; +#[cfg(feature = "alloc")] +pub use owned_format_item::OwnedFormatItem; + +pub use self::component::Component; +#[cfg(feature = "alloc")] +pub use self::parse::{ + parse, parse_borrowed, parse_owned, parse_strftime_borrowed, parse_strftime_owned, +}; + +/// Well-known formats, typically standards. +pub mod well_known { + pub mod iso8601; + mod rfc2822; + mod rfc3339; + + #[doc(inline)] + pub use iso8601::Iso8601; + pub use rfc2822::Rfc2822; + pub use rfc3339::Rfc3339; +} diff --git a/vendor/time/src/format_description/modifier.rs b/vendor/time/src/format_description/modifier.rs new file mode 100644 index 00000000..82fca805 --- /dev/null +++ b/vendor/time/src/format_description/modifier.rs @@ -0,0 +1,434 @@ +//! Various modifiers for components. + +use core::num::NonZeroU16; + +/// Day of the month. +#[non_exhaustive] +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub struct Day { + /// The padding to obtain the minimum width. + pub padding: Padding, +} + +/// The representation of a month. +#[non_exhaustive] +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub enum MonthRepr { + /// The number of the month (January is 1, December is 12). + Numerical, + /// The long form of the month name (e.g. "January"). + Long, + /// The short form of the month name (e.g. "Jan"). + Short, +} + +/// Month of the year. +#[non_exhaustive] +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub struct Month { + /// The padding to obtain the minimum width. + pub padding: Padding, + /// What form of representation should be used? + pub repr: MonthRepr, + /// Is the value case sensitive when parsing? + pub case_sensitive: bool, +} + +/// Ordinal day of the year. +#[non_exhaustive] +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub struct Ordinal { + /// The padding to obtain the minimum width. + pub padding: Padding, +} + +/// The representation used for the day of the week. +#[non_exhaustive] +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub enum WeekdayRepr { + /// The short form of the weekday (e.g. "Mon"). + Short, + /// The long form of the weekday (e.g. "Monday"). + Long, + /// A numerical representation using Sunday as the first day of the week. + /// + /// Sunday is either 0 or 1, depending on the other modifier's value. + Sunday, + /// A numerical representation using Monday as the first day of the week. + /// + /// Monday is either 0 or 1, depending on the other modifier's value. + Monday, +} + +/// Day of the week. +#[non_exhaustive] +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub struct Weekday { + /// What form of representation should be used? + pub repr: WeekdayRepr, + /// When using a numerical representation, should it be zero or one-indexed? + pub one_indexed: bool, + /// Is the value case sensitive when parsing? + pub case_sensitive: bool, +} + +/// The representation used for the week number. +#[non_exhaustive] +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub enum WeekNumberRepr { + /// Week 1 is the week that contains January 4. + Iso, + /// Week 1 begins on the first Sunday of the calendar year. + Sunday, + /// Week 1 begins on the first Monday of the calendar year. + Monday, +} + +/// Week within the year. +#[non_exhaustive] +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub struct WeekNumber { + /// The padding to obtain the minimum width. + pub padding: Padding, + /// What kind of representation should be used? + pub repr: WeekNumberRepr, +} + +/// The representation used for a year value. +#[non_exhaustive] +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub enum YearRepr { + /// The full value of the year. + Full, + /// All digits except the last two. Includes the sign, if any. + Century, + /// Only the last two digits of the year. + LastTwo, +} + +/// The range of years that are supported. +/// +/// This modifier has no effect when the year repr is [`LastTwo`](YearRepr::LastTwo). +#[non_exhaustive] +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub enum YearRange { + /// Years between -9999 and 9999 are supported. + Standard, + /// Years between -999_999 and 999_999 are supported, with the sign being required if the year + /// contains more than four digits. + /// + /// If the `large-dates` feature is not enabled, this variant is equivalent to `Standard`. + Extended, +} + +/// Year of the date. +#[non_exhaustive] +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub struct Year { + /// The padding to obtain the minimum width. + pub padding: Padding, + /// What kind of representation should be used? + pub repr: YearRepr, + /// What range of years is supported? + pub range: YearRange, + /// Whether the value is based on the ISO week number or the Gregorian calendar. + pub iso_week_based: bool, + /// Whether the `+` sign is present when a positive year contains fewer than five digits. + pub sign_is_mandatory: bool, +} + +/// Hour of the day. +#[non_exhaustive] +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub struct Hour { + /// The padding to obtain the minimum width. + pub padding: Padding, + /// Is the hour displayed using a 12 or 24-hour clock? + pub is_12_hour_clock: bool, +} + +/// Minute within the hour. +#[non_exhaustive] +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub struct Minute { + /// The padding to obtain the minimum width. + pub padding: Padding, +} + +/// AM/PM part of the time. +#[non_exhaustive] +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub struct Period { + /// Is the period uppercase or lowercase? + pub is_uppercase: bool, + /// Is the value case sensitive when parsing? + /// + /// Note that when `false`, the `is_uppercase` field has no effect on parsing behavior. + pub case_sensitive: bool, +} + +/// Second within the minute. +#[non_exhaustive] +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub struct Second { + /// The padding to obtain the minimum width. + pub padding: Padding, +} + +/// The number of digits present in a subsecond representation. +#[non_exhaustive] +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub enum SubsecondDigits { + /// Exactly one digit. + One, + /// Exactly two digits. + Two, + /// Exactly three digits. + Three, + /// Exactly four digits. + Four, + /// Exactly five digits. + Five, + /// Exactly six digits. + Six, + /// Exactly seven digits. + Seven, + /// Exactly eight digits. + Eight, + /// Exactly nine digits. + Nine, + /// Any number of digits (up to nine) that is at least one. When formatting, the minimum digits + /// necessary will be used. + OneOrMore, +} + +/// Subsecond within the second. +#[non_exhaustive] +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub struct Subsecond { + /// How many digits are present in the component? + pub digits: SubsecondDigits, +} + +/// Hour of the UTC offset. +#[non_exhaustive] +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub struct OffsetHour { + /// Whether the `+` sign is present on positive values. + pub sign_is_mandatory: bool, + /// The padding to obtain the minimum width. + pub padding: Padding, +} + +/// Minute within the hour of the UTC offset. +#[non_exhaustive] +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub struct OffsetMinute { + /// The padding to obtain the minimum width. + pub padding: Padding, +} + +/// Second within the minute of the UTC offset. +#[non_exhaustive] +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub struct OffsetSecond { + /// The padding to obtain the minimum width. + pub padding: Padding, +} + +/// Type of padding to ensure a minimum width. +#[non_exhaustive] +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub enum Padding { + /// A space character (` `) should be used as padding. + Space, + /// A zero character (`0`) should be used as padding. + Zero, + /// There is no padding. This can result in a width below the otherwise minimum number of + /// characters. + None, +} + +/// Ignore some number of bytes. +/// +/// This has no effect when formatting. +#[non_exhaustive] +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub struct Ignore { + /// The number of bytes to ignore. + pub count: NonZeroU16, +} + +// Needed as `Default` is deliberately not implemented for `Ignore`. The number of bytes to ignore +// must be explicitly provided. +impl Ignore { + /// Create an instance of `Ignore` with the provided number of bytes to ignore. + pub const fn count(count: NonZeroU16) -> Self { + Self { count } + } +} + +/// The precision of a Unix timestamp. +#[non_exhaustive] +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub enum UnixTimestampPrecision { + /// Seconds since the Unix epoch. + Second, + /// Milliseconds since the Unix epoch. + Millisecond, + /// Microseconds since the Unix epoch. + Microsecond, + /// Nanoseconds since the Unix epoch. + Nanosecond, +} + +/// A Unix timestamp. +#[non_exhaustive] +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub struct UnixTimestamp { + /// The precision of the timestamp. + pub precision: UnixTimestampPrecision, + /// Whether the `+` sign must be present for a non-negative timestamp. + pub sign_is_mandatory: bool, +} + +/// The end of input. +/// +/// There is currently not customization for this modifier. +#[non_exhaustive] +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub struct End; + +/// Generate the provided code if and only if `pub` is present. +macro_rules! if_pub { + (pub $(#[$attr:meta])*; $($x:tt)*) => { + $(#[$attr])* + /// + /// This function exists since [`Default::default()`] cannot be used in a `const` context. + /// It may be removed once that becomes possible. As the [`Default`] trait is in the + /// prelude, removing this function in the future will not cause any resolution failures for + /// the overwhelming majority of users; only users who use `#![no_implicit_prelude]` will be + /// affected. As such it will not be considered a breaking change. + $($x)* + }; + ($($_:tt)*) => {}; +} + +/// Implement `Default` for the given type. This also generates an inherent implementation of a +/// `default` method that is `const fn`, permitting the default value to be used in const contexts. +// Every modifier should use this macro rather than a derived `Default`. +macro_rules! impl_const_default { + ($($(#[$doc:meta])* $(@$pub:ident)? $type:ty => $default:expr;)*) => {$( + impl $type { + if_pub! { + $($pub)? + $(#[$doc])*; + pub const fn default() -> Self { + $default + } + } + } + + $(#[$doc])* + impl Default for $type { + fn default() -> Self { + $default + } + } + )*}; +} + +impl_const_default! { + /// Creates a modifier that indicates the value is [padded with zeroes](Padding::Zero). + @pub Day => Self { padding: Padding::Zero }; + /// Creates a modifier that indicates the value uses the + /// [`Numerical`](Self::Numerical) representation. + MonthRepr => Self::Numerical; + /// Creates an instance of this type that indicates the value uses the + /// [`Numerical`](MonthRepr::Numerical) representation, is [padded with zeroes](Padding::Zero), + /// and is case-sensitive when parsing. + @pub Month => Self { + padding: Padding::Zero, + repr: MonthRepr::Numerical, + case_sensitive: true, + }; + /// Creates a modifier that indicates the value is [padded with zeroes](Padding::Zero). + @pub Ordinal => Self { padding: Padding::Zero }; + /// Creates a modifier that indicates the value uses the [`Long`](Self::Long) representation. + WeekdayRepr => Self::Long; + /// Creates a modifier that indicates the value uses the [`Long`](WeekdayRepr::Long) + /// representation and is case-sensitive when parsing. If the representation is changed to a + /// numerical one, the instance defaults to one-based indexing. + @pub Weekday => Self { + repr: WeekdayRepr::Long, + one_indexed: true, + case_sensitive: true, + }; + /// Creates a modifier that indicates that the value uses the [`Iso`](Self::Iso) representation. + WeekNumberRepr => Self::Iso; + /// Creates a modifier that indicates that the value is [padded with zeroes](Padding::Zero) + /// and uses the [`Iso`](WeekNumberRepr::Iso) representation. + @pub WeekNumber => Self { + padding: Padding::Zero, + repr: WeekNumberRepr::Iso, + }; + /// Creates a modifier that indicates the value uses the [`Full`](Self::Full) representation. + YearRepr => Self::Full; + /// Creates a modifier that indicates the value uses the [`Extended`](Self::Extended) range. + YearRange => Self::Extended; + /// Creates a modifier that indicates the value uses the [`Full`](YearRepr::Full) + /// representation, is [padded with zeroes](Padding::Zero), uses the Gregorian calendar as its + /// base, and only includes the year's sign if necessary. + @pub Year => Self { + padding: Padding::Zero, + repr: YearRepr::Full, + range: YearRange::Extended, + iso_week_based: false, + sign_is_mandatory: false, + }; + /// Creates a modifier that indicates the value is [padded with zeroes](Padding::Zero) and + /// has the 24-hour representation. + @pub Hour => Self { + padding: Padding::Zero, + is_12_hour_clock: false, + }; + /// Creates a modifier that indicates the value is [padded with zeroes](Padding::Zero). + @pub Minute => Self { padding: Padding::Zero }; + /// Creates a modifier that indicates the value uses the upper-case representation and is + /// case-sensitive when parsing. + @pub Period => Self { + is_uppercase: true, + case_sensitive: true, + }; + /// Creates a modifier that indicates the value is [padded with zeroes](Padding::Zero). + @pub Second => Self { padding: Padding::Zero }; + /// Creates a modifier that indicates the stringified value contains [one or more + /// digits](Self::OneOrMore). + SubsecondDigits => Self::OneOrMore; + /// Creates a modifier that indicates the stringified value contains [one or more + /// digits](SubsecondDigits::OneOrMore). + @pub Subsecond => Self { digits: SubsecondDigits::OneOrMore }; + /// Creates a modifier that indicates the value only uses a sign for negative values and is + /// [padded with zeroes](Padding::Zero). + @pub OffsetHour => Self { + sign_is_mandatory: false, + padding: Padding::Zero, + }; + /// Creates a modifier that indicates the value is [padded with zeroes](Padding::Zero). + @pub OffsetMinute => Self { padding: Padding::Zero }; + /// Creates a modifier that indicates the value is [padded with zeroes](Padding::Zero). + @pub OffsetSecond => Self { padding: Padding::Zero }; + /// Creates a modifier that indicates the value is [padded with zeroes](Self::Zero). + Padding => Self::Zero; + /// Creates a modifier that indicates the value represents the [number of seconds](Self::Second) + /// since the Unix epoch. + UnixTimestampPrecision => Self::Second; + /// Creates a modifier that indicates the value represents the [number of + /// seconds](UnixTimestampPrecision::Second) since the Unix epoch. The sign is not mandatory. + @pub UnixTimestamp => Self { + precision: UnixTimestampPrecision::Second, + sign_is_mandatory: false, + }; + /// Creates a modifier used to represent the end of input. + @pub End => End; +} diff --git a/vendor/time/src/format_description/owned_format_item.rs b/vendor/time/src/format_description/owned_format_item.rs new file mode 100644 index 00000000..391e76f0 --- /dev/null +++ b/vendor/time/src/format_description/owned_format_item.rs @@ -0,0 +1,158 @@ +//! A format item with owned data. + +use alloc::boxed::Box; +use alloc::string::String; +use alloc::vec::Vec; +use core::fmt; + +use crate::error; +use crate::format_description::{BorrowedFormatItem, Component}; + +/// A complete description of how to format and parse a type. +#[non_exhaustive] +#[derive(Clone, PartialEq, Eq)] +pub enum OwnedFormatItem { + /// Bytes that are formatted as-is. + /// + /// **Note**: These bytes **should** be UTF-8, but are not required to be. The value is passed + /// through `String::from_utf8_lossy` when necessary. + Literal(Box<[u8]>), + /// A minimal representation of a single non-literal item. + Component(Component), + /// A series of literals or components that collectively form a partial or complete + /// description. + Compound(Box<[Self]>), + /// A `FormatItem` that may or may not be present when parsing. If parsing fails, there + /// will be no effect on the resulting `struct`. + /// + /// This variant has no effect on formatting, as the value is guaranteed to be present. + Optional(Box<Self>), + /// A series of `FormatItem`s where, when parsing, the first successful parse is used. When + /// formatting, the first element of the [`Vec`] is used. An empty [`Vec`] is a no-op when + /// formatting or parsing. + First(Box<[Self]>), +} + +impl fmt::Debug for OwnedFormatItem { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + match self { + Self::Literal(literal) => f.write_str(&String::from_utf8_lossy(literal)), + Self::Component(component) => component.fmt(f), + Self::Compound(compound) => compound.fmt(f), + Self::Optional(item) => f.debug_tuple("Optional").field(item).finish(), + Self::First(items) => f.debug_tuple("First").field(items).finish(), + } + } +} + +impl From<BorrowedFormatItem<'_>> for OwnedFormatItem { + fn from(item: BorrowedFormatItem<'_>) -> Self { + (&item).into() + } +} + +impl From<&BorrowedFormatItem<'_>> for OwnedFormatItem { + fn from(item: &BorrowedFormatItem<'_>) -> Self { + match item { + BorrowedFormatItem::Literal(literal) => { + Self::Literal(literal.to_vec().into_boxed_slice()) + } + BorrowedFormatItem::Component(component) => Self::Component(*component), + BorrowedFormatItem::Compound(compound) => Self::Compound( + compound + .iter() + .cloned() + .map(Into::into) + .collect::<Vec<_>>() + .into_boxed_slice(), + ), + BorrowedFormatItem::Optional(item) => Self::Optional(Box::new((*item).into())), + BorrowedFormatItem::First(items) => Self::First( + items + .iter() + .cloned() + .map(Into::into) + .collect::<Vec<_>>() + .into_boxed_slice(), + ), + } + } +} + +impl From<Vec<BorrowedFormatItem<'_>>> for OwnedFormatItem { + fn from(items: Vec<BorrowedFormatItem<'_>>) -> Self { + items.as_slice().into() + } +} + +impl<'a, T: AsRef<[BorrowedFormatItem<'a>]> + ?Sized> From<&T> for OwnedFormatItem { + fn from(items: &T) -> Self { + Self::Compound( + items + .as_ref() + .iter() + .cloned() + .map(Into::into) + .collect::<Vec<_>>() + .into_boxed_slice(), + ) + } +} + +impl From<Component> for OwnedFormatItem { + fn from(component: Component) -> Self { + Self::Component(component) + } +} + +impl TryFrom<OwnedFormatItem> for Component { + type Error = error::DifferentVariant; + + fn try_from(value: OwnedFormatItem) -> Result<Self, Self::Error> { + match value { + OwnedFormatItem::Component(component) => Ok(component), + _ => Err(error::DifferentVariant), + } + } +} + +impl From<Vec<Self>> for OwnedFormatItem { + fn from(items: Vec<Self>) -> Self { + Self::Compound(items.into_boxed_slice()) + } +} + +impl TryFrom<OwnedFormatItem> for Vec<OwnedFormatItem> { + type Error = error::DifferentVariant; + + fn try_from(value: OwnedFormatItem) -> Result<Self, Self::Error> { + match value { + OwnedFormatItem::Compound(items) => Ok(items.into_vec()), + _ => Err(error::DifferentVariant), + } + } +} + +impl PartialEq<Component> for OwnedFormatItem { + fn eq(&self, rhs: &Component) -> bool { + matches!(self, Self::Component(component) if component == rhs) + } +} + +impl PartialEq<OwnedFormatItem> for Component { + fn eq(&self, rhs: &OwnedFormatItem) -> bool { + rhs == self + } +} + +impl PartialEq<&[Self]> for OwnedFormatItem { + fn eq(&self, rhs: &&[Self]) -> bool { + matches!(self, Self::Compound(compound) if &&**compound == rhs) + } +} + +impl PartialEq<OwnedFormatItem> for &[OwnedFormatItem] { + fn eq(&self, rhs: &OwnedFormatItem) -> bool { + rhs == self + } +} diff --git a/vendor/time/src/format_description/parse/ast.rs b/vendor/time/src/format_description/parse/ast.rs new file mode 100644 index 00000000..cf13de89 --- /dev/null +++ b/vendor/time/src/format_description/parse/ast.rs @@ -0,0 +1,384 @@ +//! AST for parsing format descriptions. + +use alloc::boxed::Box; +use alloc::string::String; +use alloc::vec::Vec; +use core::iter; + +use super::{lexer, unused, Error, Location, Spanned, SpannedValue, Unused}; +use crate::internal_macros::bug; + +/// One part of a complete format description. +pub(super) enum Item<'a> { + /// A literal string, formatted and parsed as-is. + /// + /// This should never be present inside a nested format description. + Literal(Spanned<&'a [u8]>), + /// A sequence of brackets. The first acts as the escape character. + /// + /// This should never be present if the lexer has `BACKSLASH_ESCAPE` set to `true`. + EscapedBracket { + /// The first bracket. + _first: Unused<Location>, + /// The second bracket. + _second: Unused<Location>, + }, + /// Part of a type, along with its modifiers. + Component { + /// Where the opening bracket was in the format string. + _opening_bracket: Unused<Location>, + /// Whitespace between the opening bracket and name. + _leading_whitespace: Unused<Option<Spanned<&'a [u8]>>>, + /// The name of the component. + name: Spanned<&'a [u8]>, + /// The modifiers for the component. + modifiers: Box<[Modifier<'a>]>, + /// Whitespace between the modifiers and closing bracket. + _trailing_whitespace: Unused<Option<Spanned<&'a [u8]>>>, + /// Where the closing bracket was in the format string. + _closing_bracket: Unused<Location>, + }, + /// An optional sequence of items. + Optional { + /// Where the opening bracket was in the format string. + opening_bracket: Location, + /// Whitespace between the opening bracket and "optional". + _leading_whitespace: Unused<Option<Spanned<&'a [u8]>>>, + /// The "optional" keyword. + _optional_kw: Unused<Spanned<&'a [u8]>>, + /// Whitespace between the "optional" keyword and the opening bracket. + _whitespace: Unused<Spanned<&'a [u8]>>, + /// The items within the optional sequence. + nested_format_description: NestedFormatDescription<'a>, + /// Where the closing bracket was in the format string. + closing_bracket: Location, + }, + /// The first matching parse of a sequence of items. + First { + /// Where the opening bracket was in the format string. + opening_bracket: Location, + /// Whitespace between the opening bracket and "first". + _leading_whitespace: Unused<Option<Spanned<&'a [u8]>>>, + /// The "first" keyword. + _first_kw: Unused<Spanned<&'a [u8]>>, + /// Whitespace between the "first" keyword and the opening bracket. + _whitespace: Unused<Spanned<&'a [u8]>>, + /// The sequences of items to try. + nested_format_descriptions: Box<[NestedFormatDescription<'a>]>, + /// Where the closing bracket was in the format string. + closing_bracket: Location, + }, +} + +/// A format description that is nested within another format description. +pub(super) struct NestedFormatDescription<'a> { + /// Where the opening bracket was in the format string. + pub(super) _opening_bracket: Unused<Location>, + /// The items within the nested format description. + pub(super) items: Box<[Item<'a>]>, + /// Where the closing bracket was in the format string. + pub(super) _closing_bracket: Unused<Location>, + /// Whitespace between the closing bracket and the next item. + pub(super) _trailing_whitespace: Unused<Option<Spanned<&'a [u8]>>>, +} + +/// A modifier for a component. +pub(super) struct Modifier<'a> { + /// Whitespace preceding the modifier. + pub(super) _leading_whitespace: Unused<Spanned<&'a [u8]>>, + /// The key of the modifier. + pub(super) key: Spanned<&'a [u8]>, + /// Where the colon of the modifier was in the format string. + pub(super) _colon: Unused<Location>, + /// The value of the modifier. + pub(super) value: Spanned<&'a [u8]>, +} + +/// Parse the provided tokens into an AST. +pub(super) fn parse< + 'item: 'iter, + 'iter, + I: Iterator<Item = Result<lexer::Token<'item>, Error>>, + const VERSION: usize, +>( + tokens: &'iter mut lexer::Lexed<I>, +) -> impl Iterator<Item = Result<Item<'item>, Error>> + 'iter { + validate_version!(VERSION); + parse_inner::<_, false, VERSION>(tokens) +} + +/// Parse the provided tokens into an AST. The const generic indicates whether the resulting +/// [`Item`] will be used directly or as part of a [`NestedFormatDescription`]. +fn parse_inner< + 'item, + I: Iterator<Item = Result<lexer::Token<'item>, Error>>, + const NESTED: bool, + const VERSION: usize, +>( + tokens: &mut lexer::Lexed<I>, +) -> impl Iterator<Item = Result<Item<'item>, Error>> + '_ { + validate_version!(VERSION); + iter::from_fn(move || { + if NESTED && tokens.peek_closing_bracket().is_some() { + return None; + } + + let next = match tokens.next()? { + Ok(token) => token, + Err(err) => return Some(Err(err)), + }; + + Some(match next { + lexer::Token::Literal(Spanned { value: _, span: _ }) if NESTED => { + bug!("literal should not be present in nested description") + } + lexer::Token::Literal(value) => Ok(Item::Literal(value)), + lexer::Token::Bracket { + kind: lexer::BracketKind::Opening, + location, + } => { + if version!(..=1) { + if let Some(second_location) = tokens.next_if_opening_bracket() { + Ok(Item::EscapedBracket { + _first: unused(location), + _second: unused(second_location), + }) + } else { + parse_component::<_, VERSION>(location, tokens) + } + } else { + parse_component::<_, VERSION>(location, tokens) + } + } + lexer::Token::Bracket { + kind: lexer::BracketKind::Closing, + location: _, + } if NESTED => { + bug!("closing bracket should be caught by the `if` statement") + } + lexer::Token::Bracket { + kind: lexer::BracketKind::Closing, + location: _, + } => { + bug!("closing bracket should have been consumed by `parse_component`") + } + lexer::Token::ComponentPart { + kind: _, // whitespace is significant in nested components + value, + } if NESTED => Ok(Item::Literal(value)), + lexer::Token::ComponentPart { kind: _, value: _ } => { + bug!("component part should have been consumed by `parse_component`") + } + }) + }) +} + +/// Parse a component. This assumes that the opening bracket has already been consumed. +fn parse_component< + 'a, + I: Iterator<Item = Result<lexer::Token<'a>, Error>>, + const VERSION: usize, +>( + opening_bracket: Location, + tokens: &mut lexer::Lexed<I>, +) -> Result<Item<'a>, Error> { + validate_version!(VERSION); + let leading_whitespace = tokens.next_if_whitespace(); + + let Some(name) = tokens.next_if_not_whitespace() else { + let span = match leading_whitespace { + Some(Spanned { value: _, span }) => span, + None => opening_bracket.to_self(), + }; + return Err(Error { + _inner: unused(span.error("expected component name")), + public: crate::error::InvalidFormatDescription::MissingComponentName { + index: span.start.byte as usize, + }, + }); + }; + + if *name == b"optional" { + let Some(whitespace) = tokens.next_if_whitespace() else { + return Err(Error { + _inner: unused(name.span.error("expected whitespace after `optional`")), + public: crate::error::InvalidFormatDescription::Expected { + what: "whitespace after `optional`", + index: name.span.end.byte as usize, + }, + }); + }; + + let nested = parse_nested::<_, VERSION>(whitespace.span.end, tokens)?; + + let Some(closing_bracket) = tokens.next_if_closing_bracket() else { + return Err(Error { + _inner: unused(opening_bracket.error("unclosed bracket")), + public: crate::error::InvalidFormatDescription::UnclosedOpeningBracket { + index: opening_bracket.byte as usize, + }, + }); + }; + + return Ok(Item::Optional { + opening_bracket, + _leading_whitespace: unused(leading_whitespace), + _optional_kw: unused(name), + _whitespace: unused(whitespace), + nested_format_description: nested, + closing_bracket, + }); + } + + if *name == b"first" { + let Some(whitespace) = tokens.next_if_whitespace() else { + return Err(Error { + _inner: unused(name.span.error("expected whitespace after `first`")), + public: crate::error::InvalidFormatDescription::Expected { + what: "whitespace after `first`", + index: name.span.end.byte as usize, + }, + }); + }; + + let mut nested_format_descriptions = Vec::new(); + while let Ok(description) = parse_nested::<_, VERSION>(whitespace.span.end, tokens) { + nested_format_descriptions.push(description); + } + + let Some(closing_bracket) = tokens.next_if_closing_bracket() else { + return Err(Error { + _inner: unused(opening_bracket.error("unclosed bracket")), + public: crate::error::InvalidFormatDescription::UnclosedOpeningBracket { + index: opening_bracket.byte as usize, + }, + }); + }; + + return Ok(Item::First { + opening_bracket, + _leading_whitespace: unused(leading_whitespace), + _first_kw: unused(name), + _whitespace: unused(whitespace), + nested_format_descriptions: nested_format_descriptions.into_boxed_slice(), + closing_bracket, + }); + } + + let mut modifiers = Vec::new(); + let trailing_whitespace = loop { + let Some(whitespace) = tokens.next_if_whitespace() else { + break None; + }; + + // This is not necessary for proper parsing, but provides a much better error when a nested + // description is used where it's not allowed. + if let Some(location) = tokens.next_if_opening_bracket() { + return Err(Error { + _inner: unused( + location + .to_self() + .error("modifier must be of the form `key:value`"), + ), + public: crate::error::InvalidFormatDescription::InvalidModifier { + value: String::from("["), + index: location.byte as usize, + }, + }); + } + + let Some(Spanned { value, span }) = tokens.next_if_not_whitespace() else { + break Some(whitespace); + }; + + let Some(colon_index) = value.iter().position(|&b| b == b':') else { + return Err(Error { + _inner: unused(span.error("modifier must be of the form `key:value`")), + public: crate::error::InvalidFormatDescription::InvalidModifier { + value: String::from_utf8_lossy(value).into_owned(), + index: span.start.byte as usize, + }, + }); + }; + let key = &value[..colon_index]; + let value = &value[colon_index + 1..]; + + if key.is_empty() { + return Err(Error { + _inner: unused(span.shrink_to_start().error("expected modifier key")), + public: crate::error::InvalidFormatDescription::InvalidModifier { + value: String::new(), + index: span.start.byte as usize, + }, + }); + } + if value.is_empty() { + return Err(Error { + _inner: unused(span.shrink_to_end().error("expected modifier value")), + public: crate::error::InvalidFormatDescription::InvalidModifier { + value: String::new(), + index: span.shrink_to_end().start.byte as usize, + }, + }); + } + + modifiers.push(Modifier { + _leading_whitespace: unused(whitespace), + key: key.spanned(span.shrink_to_before(colon_index as u32)), + _colon: unused(span.start.offset(colon_index as u32)), + value: value.spanned(span.shrink_to_after(colon_index as u32)), + }); + }; + + let Some(closing_bracket) = tokens.next_if_closing_bracket() else { + return Err(Error { + _inner: unused(opening_bracket.error("unclosed bracket")), + public: crate::error::InvalidFormatDescription::UnclosedOpeningBracket { + index: opening_bracket.byte as usize, + }, + }); + }; + + Ok(Item::Component { + _opening_bracket: unused(opening_bracket), + _leading_whitespace: unused(leading_whitespace), + name, + modifiers: modifiers.into_boxed_slice(), + _trailing_whitespace: unused(trailing_whitespace), + _closing_bracket: unused(closing_bracket), + }) +} + +/// Parse a nested format description. The location provided is the the most recent one consumed. +fn parse_nested<'a, I: Iterator<Item = Result<lexer::Token<'a>, Error>>, const VERSION: usize>( + last_location: Location, + tokens: &mut lexer::Lexed<I>, +) -> Result<NestedFormatDescription<'a>, Error> { + validate_version!(VERSION); + let Some(opening_bracket) = tokens.next_if_opening_bracket() else { + return Err(Error { + _inner: unused(last_location.error("expected opening bracket")), + public: crate::error::InvalidFormatDescription::Expected { + what: "opening bracket", + index: last_location.byte as usize, + }, + }); + }; + let items = parse_inner::<_, true, VERSION>(tokens).collect::<Result<_, _>>()?; + let Some(closing_bracket) = tokens.next_if_closing_bracket() else { + return Err(Error { + _inner: unused(opening_bracket.error("unclosed bracket")), + public: crate::error::InvalidFormatDescription::UnclosedOpeningBracket { + index: opening_bracket.byte as usize, + }, + }); + }; + let trailing_whitespace = tokens.next_if_whitespace(); + + Ok(NestedFormatDescription { + _opening_bracket: unused(opening_bracket), + items, + _closing_bracket: unused(closing_bracket), + _trailing_whitespace: unused(trailing_whitespace), + }) +} diff --git a/vendor/time/src/format_description/parse/format_item.rs b/vendor/time/src/format_description/parse/format_item.rs new file mode 100644 index 00000000..d401daa5 --- /dev/null +++ b/vendor/time/src/format_description/parse/format_item.rs @@ -0,0 +1,549 @@ +//! Typed, validated representation of a parsed format description. + +use alloc::boxed::Box; +use alloc::string::String; +use core::num::NonZeroU16; +use core::str::{self, FromStr}; + +use super::{ast, unused, Error, Span, Spanned}; +use crate::internal_macros::bug; + +/// Parse an AST iterator into a sequence of format items. +pub(super) fn parse<'a>( + ast_items: impl Iterator<Item = Result<ast::Item<'a>, Error>>, +) -> impl Iterator<Item = Result<Item<'a>, Error>> { + ast_items.map(|ast_item| ast_item.and_then(Item::from_ast)) +} + +/// A description of how to format and parse one part of a type. +pub(super) enum Item<'a> { + /// A literal string. + Literal(&'a [u8]), + /// Part of a type, along with its modifiers. + Component(Component), + /// A sequence of optional items. + Optional { + /// The items themselves. + value: Box<[Self]>, + /// The span of the full sequence. + span: Span, + }, + /// The first matching parse of a sequence of format descriptions. + First { + /// The sequence of format descriptions. + value: Box<[Box<[Self]>]>, + /// The span of the full sequence. + span: Span, + }, +} + +impl Item<'_> { + /// Parse an AST item into a format item. + pub(super) fn from_ast(ast_item: ast::Item<'_>) -> Result<Item<'_>, Error> { + Ok(match ast_item { + ast::Item::Component { + _opening_bracket: _, + _leading_whitespace: _, + name, + modifiers, + _trailing_whitespace: _, + _closing_bracket: _, + } => Item::Component(component_from_ast(&name, &modifiers)?), + ast::Item::Literal(Spanned { value, span: _ }) => Item::Literal(value), + ast::Item::EscapedBracket { + _first: _, + _second: _, + } => Item::Literal(b"["), + ast::Item::Optional { + opening_bracket, + _leading_whitespace: _, + _optional_kw: _, + _whitespace: _, + nested_format_description, + closing_bracket, + } => { + let items = nested_format_description + .items + .into_vec() + .into_iter() + .map(Item::from_ast) + .collect::<Result<_, _>>()?; + Item::Optional { + value: items, + span: opening_bracket.to(closing_bracket), + } + } + ast::Item::First { + opening_bracket, + _leading_whitespace: _, + _first_kw: _, + _whitespace: _, + nested_format_descriptions, + closing_bracket, + } => { + let items = nested_format_descriptions + .into_vec() + .into_iter() + .map(|nested_format_description| { + nested_format_description + .items + .into_vec() + .into_iter() + .map(Item::from_ast) + .collect() + }) + .collect::<Result<_, _>>()?; + Item::First { + value: items, + span: opening_bracket.to(closing_bracket), + } + } + }) + } +} + +impl<'a> TryFrom<Item<'a>> for crate::format_description::BorrowedFormatItem<'a> { + type Error = Error; + + fn try_from(item: Item<'a>) -> Result<Self, Self::Error> { + match item { + Item::Literal(literal) => Ok(Self::Literal(literal)), + Item::Component(component) => Ok(Self::Component(component.into())), + Item::Optional { value: _, span } => Err(Error { + _inner: unused(span.error( + "optional items are not supported in runtime-parsed format descriptions", + )), + public: crate::error::InvalidFormatDescription::NotSupported { + what: "optional item", + context: "runtime-parsed format descriptions", + index: span.start.byte as usize, + }, + }), + Item::First { value: _, span } => Err(Error { + _inner: unused(span.error( + "'first' items are not supported in runtime-parsed format descriptions", + )), + public: crate::error::InvalidFormatDescription::NotSupported { + what: "'first' item", + context: "runtime-parsed format descriptions", + index: span.start.byte as usize, + }, + }), + } + } +} + +impl From<Item<'_>> for crate::format_description::OwnedFormatItem { + fn from(item: Item<'_>) -> Self { + match item { + Item::Literal(literal) => Self::Literal(literal.to_vec().into_boxed_slice()), + Item::Component(component) => Self::Component(component.into()), + Item::Optional { value, span: _ } => Self::Optional(Box::new(value.into())), + Item::First { value, span: _ } => { + Self::First(value.into_vec().into_iter().map(Into::into).collect()) + } + } + } +} + +impl<'a> From<Box<[Item<'a>]>> for crate::format_description::OwnedFormatItem { + fn from(items: Box<[Item<'a>]>) -> Self { + let items = items.into_vec(); + match <[_; 1]>::try_from(items) { + Ok([item]) => item.into(), + Err(vec) => Self::Compound(vec.into_iter().map(Into::into).collect()), + } + } +} + +/// Declare the `Component` struct. +macro_rules! component_definition { + (@if_required required then { $($then:tt)* } $(else { $($else:tt)* })?) => { $($then)* }; + (@if_required then { $($then:tt)* } $(else { $($else:tt)* })?) => { $($($else)*)? }; + (@if_from_str from_str then { $($then:tt)* } $(else { $($else:tt)* })?) => { $($then)* }; + (@if_from_str then { $($then:tt)* } $(else { $($else:tt)* })?) => { $($($else)*)? }; + + ($vis:vis enum $name:ident { + $($variant:ident = $parse_variant:literal {$( + $(#[$required:tt])? + $field:ident = $parse_field:literal: + Option<$(#[$from_str:tt])? $field_type:ty> + => $target_field:ident + ),* $(,)?}),* $(,)? + }) => { + $vis enum $name { + $($variant($variant),)* + } + + $($vis struct $variant { + $($field: Option<$field_type>),* + })* + + $(impl $variant { + /// Parse the component from the AST, given its modifiers. + fn with_modifiers( + modifiers: &[ast::Modifier<'_>], + _component_span: Span, + ) -> Result<Self, Error> + { + // rustc will complain if the modifier is empty. + #[allow(unused_mut)] + let mut this = Self { + $($field: None),* + }; + + for modifier in modifiers { + $(#[allow(clippy::string_lit_as_bytes)] + if modifier.key.eq_ignore_ascii_case($parse_field.as_bytes()) { + this.$field = component_definition!(@if_from_str $($from_str)? + then { + parse_from_modifier_value::<$field_type>(&modifier.value)? + } else { + <$field_type>::from_modifier_value(&modifier.value)? + }); + continue; + })* + return Err(Error { + _inner: unused(modifier.key.span.error("invalid modifier key")), + public: crate::error::InvalidFormatDescription::InvalidModifier { + value: String::from_utf8_lossy(*modifier.key).into_owned(), + index: modifier.key.span.start.byte as usize, + } + }); + } + + $(component_definition! { @if_required $($required)? then { + if this.$field.is_none() { + return Err(Error { + _inner: unused(_component_span.error("missing required modifier")), + public: + crate::error::InvalidFormatDescription::MissingRequiredModifier { + name: $parse_field, + index: _component_span.start.byte as usize, + } + }); + } + }})* + + Ok(this) + } + })* + + impl From<$name> for crate::format_description::Component { + fn from(component: $name) -> Self { + match component {$( + $name::$variant($variant { $($field),* }) => { + $crate::format_description::component::Component::$variant( + $crate::format_description::modifier::$variant {$( + $target_field: component_definition! { @if_required $($required)? + then { + match $field { + Some(value) => value.into(), + None => bug!("required modifier was not set"), + } + } else { + $field.unwrap_or_default().into() + } + } + ),*} + ) + } + )*} + } + } + + /// Parse a component from the AST, given its name and modifiers. + fn component_from_ast( + name: &Spanned<&[u8]>, + modifiers: &[ast::Modifier<'_>], + ) -> Result<Component, Error> { + $(#[allow(clippy::string_lit_as_bytes)] + if name.eq_ignore_ascii_case($parse_variant.as_bytes()) { + return Ok(Component::$variant($variant::with_modifiers(&modifiers, name.span)?)); + })* + Err(Error { + _inner: unused(name.span.error("invalid component")), + public: crate::error::InvalidFormatDescription::InvalidComponentName { + name: String::from_utf8_lossy(name).into_owned(), + index: name.span.start.byte as usize, + }, + }) + } + } +} + +// Keep in alphabetical order. +component_definition! { + pub(super) enum Component { + Day = "day" { + padding = "padding": Option<Padding> => padding, + }, + End = "end" {}, + Hour = "hour" { + padding = "padding": Option<Padding> => padding, + base = "repr": Option<HourBase> => is_12_hour_clock, + }, + Ignore = "ignore" { + #[required] + count = "count": Option<#[from_str] NonZeroU16> => count, + }, + Minute = "minute" { + padding = "padding": Option<Padding> => padding, + }, + Month = "month" { + padding = "padding": Option<Padding> => padding, + repr = "repr": Option<MonthRepr> => repr, + case_sensitive = "case_sensitive": Option<MonthCaseSensitive> => case_sensitive, + }, + OffsetHour = "offset_hour" { + sign_behavior = "sign": Option<SignBehavior> => sign_is_mandatory, + padding = "padding": Option<Padding> => padding, + }, + OffsetMinute = "offset_minute" { + padding = "padding": Option<Padding> => padding, + }, + OffsetSecond = "offset_second" { + padding = "padding": Option<Padding> => padding, + }, + Ordinal = "ordinal" { + padding = "padding": Option<Padding> => padding, + }, + Period = "period" { + case = "case": Option<PeriodCase> => is_uppercase, + case_sensitive = "case_sensitive": Option<PeriodCaseSensitive> => case_sensitive, + }, + Second = "second" { + padding = "padding": Option<Padding> => padding, + }, + Subsecond = "subsecond" { + digits = "digits": Option<SubsecondDigits> => digits, + }, + UnixTimestamp = "unix_timestamp" { + precision = "precision": Option<UnixTimestampPrecision> => precision, + sign_behavior = "sign": Option<SignBehavior> => sign_is_mandatory, + }, + Weekday = "weekday" { + repr = "repr": Option<WeekdayRepr> => repr, + one_indexed = "one_indexed": Option<WeekdayOneIndexed> => one_indexed, + case_sensitive = "case_sensitive": Option<WeekdayCaseSensitive> => case_sensitive, + }, + WeekNumber = "week_number" { + padding = "padding": Option<Padding> => padding, + repr = "repr": Option<WeekNumberRepr> => repr, + }, + Year = "year" { + padding = "padding": Option<Padding> => padding, + repr = "repr": Option<YearRepr> => repr, + range = "range": Option<YearRange> => range, + base = "base": Option<YearBase> => iso_week_based, + sign_behavior = "sign": Option<SignBehavior> => sign_is_mandatory, + }, + } +} + +/// Get the target type for a given enum. +macro_rules! target_ty { + ($name:ident $type:ty) => { + $type + }; + ($name:ident) => { + $crate::format_description::modifier::$name + }; +} + +/// Get the target value for a given enum. +macro_rules! target_value { + ($name:ident $variant:ident $value:expr) => { + $value + }; + ($name:ident $variant:ident) => { + $crate::format_description::modifier::$name::$variant + }; +} + +/// Declare the various modifiers. +/// +/// For the general case, ordinary syntax can be used. Note that you _must_ declare a default +/// variant. The only significant change is that the string representation of the variant must be +/// provided after the variant name. For example, `Numerical = b"numerical"` declares a variant +/// named `Numerical` with the string representation `b"numerical"`. This is the value that will be +/// used when parsing the modifier. The value is not case sensitive. +/// +/// If the type in the public API does not have the same name as the type in the internal +/// representation, then the former must be specified in parenthesis after the internal name. For +/// example, `HourBase(bool)` has an internal name "HourBase", but is represented as a boolean in +/// the public API. +/// +/// By default, the internal variant name is assumed to be the same as the public variant name. If +/// this is not the case, the qualified path to the variant must be specified in parenthesis after +/// the internal variant name. For example, `Twelve(true)` has an internal variant name "Twelve", +/// but is represented as `true` in the public API. +macro_rules! modifier { + ($( + enum $name:ident $(($target_ty:ty))? { + $( + $(#[$attr:meta])? + $variant:ident $(($target_value:expr))? = $parse_variant:literal + ),* $(,)? + } + )+) => {$( + #[derive(Default)] + enum $name { + $($(#[$attr])? $variant),* + } + + impl $name { + /// Parse the modifier from its string representation. + fn from_modifier_value(value: &Spanned<&[u8]>) -> Result<Option<Self>, Error> { + $(if value.eq_ignore_ascii_case($parse_variant) { + return Ok(Some(Self::$variant)); + })* + Err(Error { + _inner: unused(value.span.error("invalid modifier value")), + public: crate::error::InvalidFormatDescription::InvalidModifier { + value: String::from_utf8_lossy(value).into_owned(), + index: value.span.start.byte as usize, + }, + }) + } + } + + impl From<$name> for target_ty!($name $($target_ty)?) { + fn from(modifier: $name) -> Self { + match modifier { + $($name::$variant => target_value!($name $variant $($target_value)?)),* + } + } + } + )+}; +} + +// Keep in alphabetical order. +modifier! { + enum HourBase(bool) { + Twelve(true) = b"12", + #[default] + TwentyFour(false) = b"24", + } + + enum MonthCaseSensitive(bool) { + False(false) = b"false", + #[default] + True(true) = b"true", + } + + enum MonthRepr { + #[default] + Numerical = b"numerical", + Long = b"long", + Short = b"short", + } + + enum Padding { + Space = b"space", + #[default] + Zero = b"zero", + None = b"none", + } + + enum PeriodCase(bool) { + Lower(false) = b"lower", + #[default] + Upper(true) = b"upper", + } + + enum PeriodCaseSensitive(bool) { + False(false) = b"false", + #[default] + True(true) = b"true", + } + + enum SignBehavior(bool) { + #[default] + Automatic(false) = b"automatic", + Mandatory(true) = b"mandatory", + } + + enum SubsecondDigits { + One = b"1", + Two = b"2", + Three = b"3", + Four = b"4", + Five = b"5", + Six = b"6", + Seven = b"7", + Eight = b"8", + Nine = b"9", + #[default] + OneOrMore = b"1+", + } + + enum UnixTimestampPrecision { + #[default] + Second = b"second", + Millisecond = b"millisecond", + Microsecond = b"microsecond", + Nanosecond = b"nanosecond", + } + + enum WeekNumberRepr { + #[default] + Iso = b"iso", + Sunday = b"sunday", + Monday = b"monday", + } + + enum WeekdayCaseSensitive(bool) { + False(false) = b"false", + #[default] + True(true) = b"true", + } + + enum WeekdayOneIndexed(bool) { + False(false) = b"false", + #[default] + True(true) = b"true", + } + + enum WeekdayRepr { + Short = b"short", + #[default] + Long = b"long", + Sunday = b"sunday", + Monday = b"monday", + } + + enum YearBase(bool) { + #[default] + Calendar(false) = b"calendar", + IsoWeek(true) = b"iso_week", + } + + enum YearRepr { + #[default] + Full = b"full", + Century = b"century", + LastTwo = b"last_two", + } + + enum YearRange { + Standard = b"standard", + #[default] + Extended = b"extended", + } +} + +/// Parse a modifier value using `FromStr`. Requires the modifier value to be valid UTF-8. +fn parse_from_modifier_value<T: FromStr>(value: &Spanned<&[u8]>) -> Result<Option<T>, Error> { + str::from_utf8(value) + .ok() + .and_then(|val| val.parse::<T>().ok()) + .map(|val| Some(val)) + .ok_or_else(|| Error { + _inner: unused(value.span.error("invalid modifier value")), + public: crate::error::InvalidFormatDescription::InvalidModifier { + value: String::from_utf8_lossy(value).into_owned(), + index: value.span.start.byte as usize, + }, + }) +} diff --git a/vendor/time/src/format_description/parse/lexer.rs b/vendor/time/src/format_description/parse/lexer.rs new file mode 100644 index 00000000..a63722e1 --- /dev/null +++ b/vendor/time/src/format_description/parse/lexer.rs @@ -0,0 +1,284 @@ +//! Lexer for parsing format descriptions. + +use core::iter; + +use super::{attach_location, unused, Error, Location, Spanned, SpannedValue}; + +/// An iterator over the lexed tokens. +pub(super) struct Lexed<I: Iterator> { + /// The internal iterator. + iter: iter::Peekable<I>, +} + +impl<I: Iterator> Iterator for Lexed<I> { + type Item = I::Item; + + fn next(&mut self) -> Option<Self::Item> { + self.iter.next() + } +} + +impl<'iter, 'token: 'iter, I: Iterator<Item = Result<Token<'token>, Error>> + 'iter> Lexed<I> { + /// Peek at the next item in the iterator. + pub(super) fn peek(&mut self) -> Option<&I::Item> { + self.iter.peek() + } + + /// Consume the next token if it is whitespace. + pub(super) fn next_if_whitespace(&mut self) -> Option<Spanned<&'token [u8]>> { + if let Some(&Ok(Token::ComponentPart { + kind: ComponentKind::Whitespace, + value, + })) = self.peek() + { + self.next(); // consume + Some(value) + } else { + None + } + } + + /// Consume the next token if it is a component item that is not whitespace. + pub(super) fn next_if_not_whitespace(&mut self) -> Option<Spanned<&'token [u8]>> { + if let Some(&Ok(Token::ComponentPart { + kind: ComponentKind::NotWhitespace, + value, + })) = self.peek() + { + self.next(); // consume + Some(value) + } else { + None + } + } + + /// Consume the next token if it is an opening bracket. + pub(super) fn next_if_opening_bracket(&mut self) -> Option<Location> { + if let Some(&Ok(Token::Bracket { + kind: BracketKind::Opening, + location, + })) = self.peek() + { + self.next(); // consume + Some(location) + } else { + None + } + } + + /// Peek at the next token if it is a closing bracket. + pub(super) fn peek_closing_bracket(&'iter mut self) -> Option<&'iter Location> { + if let Some(Ok(Token::Bracket { + kind: BracketKind::Closing, + location, + })) = self.peek() + { + Some(location) + } else { + None + } + } + + /// Consume the next token if it is a closing bracket. + pub(super) fn next_if_closing_bracket(&mut self) -> Option<Location> { + if let Some(&Ok(Token::Bracket { + kind: BracketKind::Closing, + location, + })) = self.peek() + { + self.next(); // consume + Some(location) + } else { + None + } + } +} + +/// A token emitted by the lexer. There is no semantic meaning at this stage. +pub(super) enum Token<'a> { + /// A literal string, formatted and parsed as-is. + Literal(Spanned<&'a [u8]>), + /// An opening or closing bracket. May or may not be the start or end of a component. + Bracket { + /// Whether the bracket is opening or closing. + kind: BracketKind, + /// Where the bracket was in the format string. + location: Location, + }, + /// One part of a component. This could be its name, a modifier, or whitespace. + ComponentPart { + /// Whether the part is whitespace or not. + kind: ComponentKind, + /// The part itself. + value: Spanned<&'a [u8]>, + }, +} + +/// What type of bracket is present. +pub(super) enum BracketKind { + /// An opening bracket: `[` + Opening, + /// A closing bracket: `]` + Closing, +} + +/// Indicates whether the component is whitespace or not. +pub(super) enum ComponentKind { + Whitespace, + NotWhitespace, +} + +/// Parse the string into a series of [`Token`]s. +/// +/// `VERSION` controls the version of the format description that is being parsed. Currently, this +/// must be 1 or 2. +/// +/// - When `VERSION` is 1, `[[` is the only escape sequence, resulting in a literal `[`. +/// - When `VERSION` is 2, all escape sequences begin with `\`. The only characters that may +/// currently follow are `\`, `[`, and `]`, all of which result in the literal character. All +/// other characters result in a lex error. +pub(super) fn lex<const VERSION: usize>( + mut input: &[u8], +) -> Lexed<impl Iterator<Item = Result<Token<'_>, Error>>> { + validate_version!(VERSION); + + let mut depth: u8 = 0; + let mut iter = attach_location(input.iter()).peekable(); + let mut second_bracket_location = None; + + let iter = iter::from_fn(move || { + // The flag is only set when version is zero. + if version!(..=1) { + // There is a flag set to emit the second half of an escaped bracket pair. + if let Some(location) = second_bracket_location.take() { + return Some(Ok(Token::Bracket { + kind: BracketKind::Opening, + location, + })); + } + } + + Some(Ok(match iter.next()? { + // possible escape sequence + (b'\\', backslash_loc) if version!(2..) => { + match iter.next() { + Some((b'\\' | b'[' | b']', char_loc)) => { + // The escaped character is emitted as-is. + let char = &input[1..2]; + input = &input[2..]; + if depth == 0 { + Token::Literal(char.spanned(backslash_loc.to(char_loc))) + } else { + Token::ComponentPart { + kind: ComponentKind::NotWhitespace, + value: char.spanned(backslash_loc.to(char_loc)), + } + } + } + Some((_, loc)) => { + return Some(Err(Error { + _inner: unused(loc.error("invalid escape sequence")), + public: crate::error::InvalidFormatDescription::Expected { + what: "valid escape sequence", + index: loc.byte as usize, + }, + })); + } + None => { + return Some(Err(Error { + _inner: unused(backslash_loc.error("unexpected end of input")), + public: crate::error::InvalidFormatDescription::Expected { + what: "valid escape sequence", + index: backslash_loc.byte as usize, + }, + })); + } + } + } + // potentially escaped opening bracket + (b'[', location) if version!(..=1) => { + if let Some((_, second_location)) = iter.next_if(|&(&byte, _)| byte == b'[') { + // Escaped bracket. Store the location of the second so we can emit it later. + second_bracket_location = Some(second_location); + input = &input[2..]; + } else { + // opening bracket + depth += 1; + input = &input[1..]; + } + + Token::Bracket { + kind: BracketKind::Opening, + location, + } + } + // opening bracket + (b'[', location) => { + depth += 1; + input = &input[1..]; + + Token::Bracket { + kind: BracketKind::Opening, + location, + } + } + // closing bracket + (b']', location) if depth > 0 => { + depth -= 1; + input = &input[1..]; + + Token::Bracket { + kind: BracketKind::Closing, + location, + } + } + // literal + (_, start_location) if depth == 0 => { + let mut bytes = 1; + let mut end_location = start_location; + + while let Some((_, location)) = + iter.next_if(|&(&byte, _)| !((version!(2..) && byte == b'\\') || byte == b'[')) + { + end_location = location; + bytes += 1; + } + + let value = &input[..bytes]; + input = &input[bytes..]; + + Token::Literal(value.spanned(start_location.to(end_location))) + } + // component part + (byte, start_location) => { + let mut bytes = 1; + let mut end_location = start_location; + let is_whitespace = byte.is_ascii_whitespace(); + + while let Some((_, location)) = iter.next_if(|&(byte, _)| { + !matches!(byte, b'\\' | b'[' | b']') + && is_whitespace == byte.is_ascii_whitespace() + }) { + end_location = location; + bytes += 1; + } + + let value = &input[..bytes]; + input = &input[bytes..]; + + Token::ComponentPart { + kind: if is_whitespace { + ComponentKind::Whitespace + } else { + ComponentKind::NotWhitespace + }, + value: value.spanned(start_location.to(end_location)), + } + } + })) + }); + + Lexed { + iter: iter.peekable(), + } +} diff --git a/vendor/time/src/format_description/parse/mod.rs b/vendor/time/src/format_description/parse/mod.rs new file mode 100644 index 00000000..d058594d --- /dev/null +++ b/vendor/time/src/format_description/parse/mod.rs @@ -0,0 +1,262 @@ +//! Parser for format descriptions. + +use alloc::boxed::Box; +use alloc::vec::Vec; + +pub use self::strftime::{parse_strftime_borrowed, parse_strftime_owned}; +use crate::{error, format_description}; + +/// A helper macro to make version restrictions simpler to read and write. +macro_rules! version { + ($range:expr) => { + $range.contains(&VERSION) + }; +} + +/// A helper macro to statically validate the version (when used as a const parameter). +macro_rules! validate_version { + ($version:ident) => { + let _ = $crate::format_description::parse::Version::<$version>::IS_VALID; + }; +} + +mod ast; +mod format_item; +mod lexer; +mod strftime; + +/// A struct that is used to ensure that the version is valid. +struct Version<const N: usize>; +impl<const N: usize> Version<N> { + /// A constant that panics if the version is not valid. This results in a post-monomorphization + /// error. + const IS_VALID: () = assert!(N >= 1 && N <= 2); +} + +/// Parse a sequence of items from the format description. +/// +/// The syntax for the format description can be found in [the +/// book](https://time-rs.github.io/book/api/format-description.html). +/// +/// This function exists for backward compatibility reasons. It is equivalent to calling +/// `parse_borrowed::<1>(s)`. In the future, this function will be deprecated in favor of +/// `parse_borrowed`. +pub fn parse( + s: &str, +) -> Result<Vec<format_description::BorrowedFormatItem<'_>>, error::InvalidFormatDescription> { + parse_borrowed::<1>(s) +} + +/// Parse a sequence of items from the format description. +/// +/// The syntax for the format description can be found in [the +/// book](https://time-rs.github.io/book/api/format-description.html). The version of the format +/// description is provided as the const parameter. **It is recommended to use version 2.** +pub fn parse_borrowed<const VERSION: usize>( + s: &str, +) -> Result<Vec<format_description::BorrowedFormatItem<'_>>, error::InvalidFormatDescription> { + validate_version!(VERSION); + let mut lexed = lexer::lex::<VERSION>(s.as_bytes()); + let ast = ast::parse::<_, VERSION>(&mut lexed); + let format_items = format_item::parse(ast); + Ok(format_items + .map(|res| res.and_then(TryInto::try_into)) + .collect::<Result<_, _>>()?) +} + +/// Parse a sequence of items from the format description. +/// +/// The syntax for the format description can be found in [the +/// book](https://time-rs.github.io/book/api/format-description.html). The version of the format +/// description is provided as the const parameter. +/// +/// Unlike [`parse`], this function returns [`OwnedFormatItem`], which owns its contents. This means +/// that there is no lifetime that needs to be handled. **It is recommended to use version 2.** +/// +/// [`OwnedFormatItem`]: crate::format_description::OwnedFormatItem +pub fn parse_owned<const VERSION: usize>( + s: &str, +) -> Result<format_description::OwnedFormatItem, error::InvalidFormatDescription> { + validate_version!(VERSION); + let mut lexed = lexer::lex::<VERSION>(s.as_bytes()); + let ast = ast::parse::<_, VERSION>(&mut lexed); + let format_items = format_item::parse(ast); + let items = format_items.collect::<Result<Box<_>, _>>()?; + Ok(items.into()) +} + +/// Attach [`Location`] information to each byte in the iterator. +fn attach_location<'item>( + iter: impl Iterator<Item = &'item u8>, +) -> impl Iterator<Item = (&'item u8, Location)> { + let mut byte_pos = 0; + + iter.map(move |byte| { + let location = Location { byte: byte_pos }; + byte_pos += 1; + (byte, location) + }) +} + +/// A location within a string. +#[derive(Clone, Copy)] +struct Location { + /// The zero-indexed byte of the string. + byte: u32, +} + +impl Location { + /// Create a new [`Span`] from `self` to `other`. + const fn to(self, end: Self) -> Span { + Span { start: self, end } + } + + /// Create a new [`Span`] consisting entirely of `self`. + const fn to_self(self) -> Span { + Span { + start: self, + end: self, + } + } + + /// Offset the location by the provided amount. + /// + /// Note that this assumes the resulting location is on the same line as the original location. + #[must_use = "this does not modify the original value"] + const fn offset(&self, offset: u32) -> Self { + Self { + byte: self.byte + offset, + } + } + + /// Create an error with the provided message at this location. + const fn error(self, message: &'static str) -> ErrorInner { + ErrorInner { + _message: message, + _span: Span { + start: self, + end: self, + }, + } + } +} + +/// A start and end point within a string. +#[derive(Clone, Copy)] +struct Span { + start: Location, + end: Location, +} + +impl Span { + /// Obtain a `Span` pointing at the start of the pre-existing span. + #[must_use = "this does not modify the original value"] + const fn shrink_to_start(&self) -> Self { + Self { + start: self.start, + end: self.start, + } + } + + /// Obtain a `Span` pointing at the end of the pre-existing span. + #[must_use = "this does not modify the original value"] + const fn shrink_to_end(&self) -> Self { + Self { + start: self.end, + end: self.end, + } + } + + /// Obtain a `Span` that ends before the provided position of the pre-existing span. + #[must_use = "this does not modify the original value"] + const fn shrink_to_before(&self, pos: u32) -> Self { + Self { + start: self.start, + end: Location { + byte: self.start.byte + pos - 1, + }, + } + } + + /// Obtain a `Span` that starts after provided position to the end of the pre-existing span. + #[must_use = "this does not modify the original value"] + const fn shrink_to_after(&self, pos: u32) -> Self { + Self { + start: Location { + byte: self.start.byte + pos + 1, + }, + end: self.end, + } + } + + /// Create an error with the provided message at this span. + const fn error(self, message: &'static str) -> ErrorInner { + ErrorInner { + _message: message, + _span: self, + } + } +} + +/// A value with an associated [`Span`]. +#[derive(Clone, Copy)] +struct Spanned<T> { + /// The value. + value: T, + /// Where the value was in the format string. + span: Span, +} + +impl<T> core::ops::Deref for Spanned<T> { + type Target = T; + + fn deref(&self) -> &Self::Target { + &self.value + } +} + +/// Helper trait to attach a [`Span`] to a value. +trait SpannedValue: Sized { + /// Attach a [`Span`] to a value. + fn spanned(self, span: Span) -> Spanned<Self>; +} + +impl<T> SpannedValue for T { + fn spanned(self, span: Span) -> Spanned<Self> { + Spanned { value: self, span } + } +} + +/// The internal error type. +struct ErrorInner { + /// The message displayed to the user. + _message: &'static str, + /// Where the error originated. + _span: Span, +} + +/// A complete error description. +struct Error { + /// The internal error. + _inner: Unused<ErrorInner>, + /// The error needed for interoperability with the rest of `time`. + public: error::InvalidFormatDescription, +} + +impl From<Error> for error::InvalidFormatDescription { + fn from(error: Error) -> Self { + error.public + } +} + +/// A value that may be used in the future, but currently is not. +/// +/// This struct exists so that data can semantically be passed around without _actually_ passing it +/// around. This way the data still exists if it is needed in the future. +// `PhantomData` is not used directly because we don't want to introduce any trait implementations. +struct Unused<T>(core::marker::PhantomData<T>); + +/// Indicate that a value is currently unused. +fn unused<T>(_: T) -> Unused<T> { + Unused(core::marker::PhantomData) +} diff --git a/vendor/time/src/format_description/parse/strftime.rs b/vendor/time/src/format_description/parse/strftime.rs new file mode 100644 index 00000000..5fcaf184 --- /dev/null +++ b/vendor/time/src/format_description/parse/strftime.rs @@ -0,0 +1,487 @@ +use alloc::string::String; +use alloc::vec::Vec; +use core::iter; + +use crate::error::InvalidFormatDescription; +use crate::format_description::parse::{ + attach_location, unused, Error, ErrorInner, Location, Spanned, SpannedValue, Unused, +}; +use crate::format_description::{self, modifier, BorrowedFormatItem, Component}; + +/// Parse a sequence of items from the [`strftime` format description][strftime docs]. +/// +/// The only heap allocation required is for the `Vec` itself. All components are bound to the +/// lifetime of the input. +/// +/// [strftime docs]: https://man7.org/linux/man-pages/man3/strftime.3.html +#[doc(alias = "parse_strptime_borrowed")] +pub fn parse_strftime_borrowed( + s: &str, +) -> Result<Vec<BorrowedFormatItem<'_>>, InvalidFormatDescription> { + let tokens = lex(s.as_bytes()); + let items = into_items(tokens).collect::<Result<_, _>>()?; + Ok(items) +} + +/// Parse a sequence of items from the [`strftime` format description][strftime docs]. +/// +/// This requires heap allocation for some owned items. +/// +/// [strftime docs]: https://man7.org/linux/man-pages/man3/strftime.3.html +#[doc(alias = "parse_strptime_owned")] +pub fn parse_strftime_owned( + s: &str, +) -> Result<format_description::OwnedFormatItem, InvalidFormatDescription> { + parse_strftime_borrowed(s).map(Into::into) +} + +#[derive(Debug, Clone, Copy, PartialEq)] +enum Padding { + /// The default padding for a numeric component. Indicated by no character. + Default, + /// Pad a numeric component with spaces. Indicated by an underscore. + Spaces, + /// Do not pad a numeric component. Indicated by a hyphen. + None, + /// Pad a numeric component with zeroes. Indicated by a zero. + Zeroes, +} + +enum Token<'a> { + Literal(Spanned<&'a [u8]>), + Component { + _percent: Unused<Location>, + padding: Spanned<Padding>, + component: Spanned<u8>, + }, +} + +fn lex(mut input: &[u8]) -> iter::Peekable<impl Iterator<Item = Result<Token<'_>, Error>>> { + let mut iter = attach_location(input.iter()).peekable(); + + iter::from_fn(move || { + Some(Ok(match iter.next()? { + (b'%', percent_loc) => match iter.next() { + Some((padding @ (b'_' | b'-' | b'0'), padding_loc)) => { + let padding = match padding { + b'_' => Padding::Spaces, + b'-' => Padding::None, + b'0' => Padding::Zeroes, + _ => unreachable!(), + }; + let (&component, component_loc) = iter.next()?; + input = &input[3..]; + Token::Component { + _percent: unused(percent_loc), + padding: padding.spanned(padding_loc.to_self()), + component: component.spanned(component_loc.to_self()), + } + } + Some((&component, component_loc)) => { + input = &input[2..]; + let span = component_loc.to_self(); + Token::Component { + _percent: unused(percent_loc), + padding: Padding::Default.spanned(span), + component: component.spanned(span), + } + } + None => { + return Some(Err(Error { + _inner: unused(percent_loc.error("unexpected end of input")), + public: InvalidFormatDescription::Expected { + what: "valid escape sequence", + index: percent_loc.byte as usize, + }, + })); + } + }, + (_, start_location) => { + let mut bytes = 1; + let mut end_location = start_location; + + while let Some((_, location)) = iter.next_if(|&(&byte, _)| byte != b'%') { + end_location = location; + bytes += 1; + } + + let value = &input[..bytes]; + input = &input[bytes..]; + + Token::Literal(value.spanned(start_location.to(end_location))) + } + })) + }) + .peekable() +} + +fn into_items<'iter, 'token: 'iter>( + mut tokens: iter::Peekable<impl Iterator<Item = Result<Token<'token>, Error>> + 'iter>, +) -> impl Iterator<Item = Result<BorrowedFormatItem<'token>, Error>> + 'iter { + iter::from_fn(move || { + let next = match tokens.next()? { + Ok(token) => token, + Err(err) => return Some(Err(err)), + }; + + Some(match next { + Token::Literal(spanned) => Ok(BorrowedFormatItem::Literal(*spanned)), + Token::Component { + _percent, + padding, + component, + } => parse_component(padding, component), + }) + }) +} + +fn parse_component( + padding: Spanned<Padding>, + component: Spanned<u8>, +) -> Result<BorrowedFormatItem<'static>, Error> { + let padding_or_default = |padding: Padding, default| match padding { + Padding::Default => default, + Padding::Spaces => modifier::Padding::Space, + Padding::None => modifier::Padding::None, + Padding::Zeroes => modifier::Padding::Zero, + }; + + /// Helper macro to create a component. + macro_rules! component { + ($name:ident { $($inner:tt)* }) => { + BorrowedFormatItem::Component(Component::$name(modifier::$name { + $($inner)* + })) + } + } + + Ok(match *component { + b'%' => BorrowedFormatItem::Literal(b"%"), + b'a' => component!(Weekday { + repr: modifier::WeekdayRepr::Short, + one_indexed: true, + case_sensitive: true, + }), + b'A' => component!(Weekday { + repr: modifier::WeekdayRepr::Long, + one_indexed: true, + case_sensitive: true, + }), + b'b' | b'h' => component!(Month { + repr: modifier::MonthRepr::Short, + padding: modifier::Padding::Zero, + case_sensitive: true, + }), + b'B' => component!(Month { + repr: modifier::MonthRepr::Long, + padding: modifier::Padding::Zero, + case_sensitive: true, + }), + b'c' => BorrowedFormatItem::Compound(&[ + component!(Weekday { + repr: modifier::WeekdayRepr::Short, + one_indexed: true, + case_sensitive: true, + }), + BorrowedFormatItem::Literal(b" "), + component!(Month { + repr: modifier::MonthRepr::Short, + padding: modifier::Padding::Zero, + case_sensitive: true, + }), + BorrowedFormatItem::Literal(b" "), + component!(Day { + padding: modifier::Padding::Space + }), + BorrowedFormatItem::Literal(b" "), + component!(Hour { + padding: modifier::Padding::Zero, + is_12_hour_clock: false, + }), + BorrowedFormatItem::Literal(b":"), + component!(Minute { + padding: modifier::Padding::Zero, + }), + BorrowedFormatItem::Literal(b":"), + component!(Second { + padding: modifier::Padding::Zero, + }), + BorrowedFormatItem::Literal(b" "), + component!(Year { + padding: modifier::Padding::Zero, + repr: modifier::YearRepr::Full, + range: modifier::YearRange::Extended, + iso_week_based: false, + sign_is_mandatory: false, + }), + ]), + b'C' => component!(Year { + padding: padding_or_default(*padding, modifier::Padding::Zero), + repr: modifier::YearRepr::Century, + range: modifier::YearRange::Extended, + iso_week_based: false, + sign_is_mandatory: false, + }), + b'd' => component!(Day { + padding: padding_or_default(*padding, modifier::Padding::Zero), + }), + b'D' => BorrowedFormatItem::Compound(&[ + component!(Month { + repr: modifier::MonthRepr::Numerical, + padding: modifier::Padding::Zero, + case_sensitive: true, + }), + BorrowedFormatItem::Literal(b"/"), + component!(Day { + padding: modifier::Padding::Zero, + }), + BorrowedFormatItem::Literal(b"/"), + component!(Year { + padding: modifier::Padding::Zero, + repr: modifier::YearRepr::LastTwo, + range: modifier::YearRange::Extended, + iso_week_based: false, + sign_is_mandatory: false, + }), + ]), + b'e' => component!(Day { + padding: padding_or_default(*padding, modifier::Padding::Space), + }), + b'F' => BorrowedFormatItem::Compound(&[ + component!(Year { + padding: modifier::Padding::Zero, + repr: modifier::YearRepr::Full, + range: modifier::YearRange::Extended, + iso_week_based: false, + sign_is_mandatory: false, + }), + BorrowedFormatItem::Literal(b"-"), + component!(Month { + padding: modifier::Padding::Zero, + repr: modifier::MonthRepr::Numerical, + case_sensitive: true, + }), + BorrowedFormatItem::Literal(b"-"), + component!(Day { + padding: modifier::Padding::Zero, + }), + ]), + b'g' => component!(Year { + padding: padding_or_default(*padding, modifier::Padding::Zero), + repr: modifier::YearRepr::LastTwo, + range: modifier::YearRange::Extended, + iso_week_based: true, + sign_is_mandatory: false, + }), + b'G' => component!(Year { + padding: modifier::Padding::Zero, + repr: modifier::YearRepr::Full, + range: modifier::YearRange::Extended, + iso_week_based: true, + sign_is_mandatory: false, + }), + b'H' => component!(Hour { + padding: padding_or_default(*padding, modifier::Padding::Zero), + is_12_hour_clock: false, + }), + b'I' => component!(Hour { + padding: padding_or_default(*padding, modifier::Padding::Zero), + is_12_hour_clock: true, + }), + b'j' => component!(Ordinal { + padding: padding_or_default(*padding, modifier::Padding::Zero), + }), + b'k' => component!(Hour { + padding: padding_or_default(*padding, modifier::Padding::Space), + is_12_hour_clock: false, + }), + b'l' => component!(Hour { + padding: padding_or_default(*padding, modifier::Padding::Space), + is_12_hour_clock: true, + }), + b'm' => component!(Month { + padding: padding_or_default(*padding, modifier::Padding::Zero), + repr: modifier::MonthRepr::Numerical, + case_sensitive: true, + }), + b'M' => component!(Minute { + padding: padding_or_default(*padding, modifier::Padding::Zero), + }), + b'n' => BorrowedFormatItem::Literal(b"\n"), + b'O' => { + return Err(Error { + _inner: unused(ErrorInner { + _message: "unsupported modifier", + _span: component.span, + }), + public: InvalidFormatDescription::NotSupported { + what: "modifier", + context: "", + index: component.span.start.byte as usize, + }, + }) + } + b'p' => component!(Period { + is_uppercase: true, + case_sensitive: true + }), + b'P' => component!(Period { + is_uppercase: false, + case_sensitive: true + }), + b'r' => BorrowedFormatItem::Compound(&[ + component!(Hour { + padding: modifier::Padding::Zero, + is_12_hour_clock: true, + }), + BorrowedFormatItem::Literal(b":"), + component!(Minute { + padding: modifier::Padding::Zero, + }), + BorrowedFormatItem::Literal(b":"), + component!(Second { + padding: modifier::Padding::Zero, + }), + BorrowedFormatItem::Literal(b" "), + component!(Period { + is_uppercase: true, + case_sensitive: true, + }), + ]), + b'R' => BorrowedFormatItem::Compound(&[ + component!(Hour { + padding: modifier::Padding::Zero, + is_12_hour_clock: false, + }), + BorrowedFormatItem::Literal(b":"), + component!(Minute { + padding: modifier::Padding::Zero, + }), + ]), + b's' => component!(UnixTimestamp { + precision: modifier::UnixTimestampPrecision::Second, + sign_is_mandatory: false, + }), + b'S' => component!(Second { + padding: padding_or_default(*padding, modifier::Padding::Zero), + }), + b't' => BorrowedFormatItem::Literal(b"\t"), + b'T' => BorrowedFormatItem::Compound(&[ + component!(Hour { + padding: modifier::Padding::Zero, + is_12_hour_clock: false, + }), + BorrowedFormatItem::Literal(b":"), + component!(Minute { + padding: modifier::Padding::Zero, + }), + BorrowedFormatItem::Literal(b":"), + component!(Second { + padding: modifier::Padding::Zero, + }), + ]), + b'u' => component!(Weekday { + repr: modifier::WeekdayRepr::Monday, + one_indexed: true, + case_sensitive: true, + }), + b'U' => component!(WeekNumber { + padding: padding_or_default(*padding, modifier::Padding::Zero), + repr: modifier::WeekNumberRepr::Sunday, + }), + b'V' => component!(WeekNumber { + padding: padding_or_default(*padding, modifier::Padding::Zero), + repr: modifier::WeekNumberRepr::Iso, + }), + b'w' => component!(Weekday { + repr: modifier::WeekdayRepr::Sunday, + one_indexed: true, + case_sensitive: true, + }), + b'W' => component!(WeekNumber { + padding: padding_or_default(*padding, modifier::Padding::Zero), + repr: modifier::WeekNumberRepr::Monday, + }), + b'x' => BorrowedFormatItem::Compound(&[ + component!(Month { + repr: modifier::MonthRepr::Numerical, + padding: modifier::Padding::Zero, + case_sensitive: true, + }), + BorrowedFormatItem::Literal(b"/"), + component!(Day { + padding: modifier::Padding::Zero + }), + BorrowedFormatItem::Literal(b"/"), + component!(Year { + padding: modifier::Padding::Zero, + repr: modifier::YearRepr::LastTwo, + range: modifier::YearRange::Extended, + iso_week_based: false, + sign_is_mandatory: false, + }), + ]), + b'X' => BorrowedFormatItem::Compound(&[ + component!(Hour { + padding: modifier::Padding::Zero, + is_12_hour_clock: false, + }), + BorrowedFormatItem::Literal(b":"), + component!(Minute { + padding: modifier::Padding::Zero, + }), + BorrowedFormatItem::Literal(b":"), + component!(Second { + padding: modifier::Padding::Zero, + }), + ]), + b'y' => component!(Year { + padding: padding_or_default(*padding, modifier::Padding::Zero), + repr: modifier::YearRepr::LastTwo, + range: modifier::YearRange::Extended, + iso_week_based: false, + sign_is_mandatory: false, + }), + b'Y' => component!(Year { + padding: modifier::Padding::Zero, + repr: modifier::YearRepr::Full, + range: modifier::YearRange::Extended, + iso_week_based: false, + sign_is_mandatory: false, + }), + b'z' => BorrowedFormatItem::Compound(&[ + component!(OffsetHour { + sign_is_mandatory: true, + padding: modifier::Padding::Zero, + }), + component!(OffsetMinute { + padding: modifier::Padding::Zero, + }), + ]), + b'Z' => { + return Err(Error { + _inner: unused(ErrorInner { + _message: "unsupported component", + _span: component.span, + }), + public: InvalidFormatDescription::NotSupported { + what: "component", + context: "", + index: component.span.start.byte as usize, + }, + }) + } + _ => { + return Err(Error { + _inner: unused(ErrorInner { + _message: "invalid component", + _span: component.span, + }), + public: InvalidFormatDescription::InvalidComponentName { + name: String::from_utf8_lossy(&[*component]).into_owned(), + index: component.span.start.byte as usize, + }, + }) + } + }) +} diff --git a/vendor/time/src/format_description/well_known/iso8601.rs b/vendor/time/src/format_description/well_known/iso8601.rs new file mode 100644 index 00000000..6b8ff2ab --- /dev/null +++ b/vendor/time/src/format_description/well_known/iso8601.rs @@ -0,0 +1,257 @@ +//! The format described in ISO 8601. + +mod adt_hack; + +use core::num::NonZeroU8; + +#[doc(hidden, no_inline)] +pub use self::adt_hack::DoNotRelyOnWhatThisIs; +pub use self::adt_hack::EncodedConfig; + +/// The format described in [ISO 8601](https://www.iso.org/iso-8601-date-and-time-format.html). +/// +/// This implementation is of ISO 8601-1:2019. It may not be compatible with other versions. +/// +/// The const parameter `CONFIG` **must** be a value that was returned by [`Config::encode`]. +/// Passing any other value is **unspecified behavior**. +/// +/// Example: 1997-11-21T09:55:06.000000000-06:00 +/// +/// # Examples +#[cfg_attr(feature = "formatting", doc = "```rust")] +#[cfg_attr(not(feature = "formatting"), doc = "```rust,ignore")] +/// # use time::format_description::well_known::Iso8601; +/// # use time_macros::datetime; +/// assert_eq!( +/// datetime!(1997-11-12 9:55:06 -6:00).format(&Iso8601::DEFAULT)?, +/// "1997-11-12T09:55:06.000000000-06:00" +/// ); +/// # Ok::<_, time::Error>(()) +/// ``` +#[derive(Clone, Copy, PartialEq, Eq)] +pub struct Iso8601<const CONFIG: EncodedConfig = { Config::DEFAULT.encode() }>; + +impl<const CONFIG: EncodedConfig> core::fmt::Debug for Iso8601<CONFIG> { + fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result { + f.debug_struct("Iso8601") + .field("config", &Config::decode(CONFIG)) + .finish() + } +} + +/// Define associated constants for `Iso8601`. +macro_rules! define_assoc_consts { + ($($(#[$doc:meta])* $vis:vis const $const_name:ident = $format:expr;)*) => {$( + const $const_name: EncodedConfig = $format.encode(); + impl Iso8601<$const_name> { + $(#[$doc])* + $vis const $const_name: Self = Self; + } + )*}; +} + +define_assoc_consts! { + /// An [`Iso8601`] with the default configuration. + /// + /// The following is the default behavior: + /// + /// - The configuration can be used for both formatting and parsing. + /// - The date, time, and UTC offset are all formatted. + /// - Separators (such as `-` and `:`) are included. + /// - The year contains four digits, such that the year must be between 0 and 9999. + /// - The date uses the calendar format. + /// - The time has precision to the second and nine decimal digits. + /// - The UTC offset has precision to the minute. + /// + /// If you need different behavior, use another associated constant. For full customization, use + /// [`Config::DEFAULT`] and [`Config`]'s methods to create a custom configuration. + pub const DEFAULT = Config::DEFAULT; + /// An [`Iso8601`] that can only be used for parsing. Using this to format a value is + /// unspecified behavior. + pub const PARSING = Config::PARSING; + /// An [`Iso8601`] that handles only the date, but is otherwise the same as [`Config::DEFAULT`]. + pub const DATE = Config::DEFAULT.set_formatted_components(FormattedComponents::Date); + /// An [`Iso8601`] that handles only the time, but is otherwise the same as [`Config::DEFAULT`]. + pub const TIME = Config::DEFAULT.set_formatted_components(FormattedComponents::Time); + /// An [`Iso8601`] that handles only the UTC offset, but is otherwise the same as + /// [`Config::DEFAULT`]. + pub const OFFSET = Config::DEFAULT.set_formatted_components(FormattedComponents::Offset); + /// An [`Iso8601`] that handles the date and time, but is otherwise the same as + /// [`Config::DEFAULT`]. + pub const DATE_TIME = Config::DEFAULT.set_formatted_components(FormattedComponents::DateTime); + /// An [`Iso8601`] that handles the date, time, and UTC offset. This is the same as + /// [`Config::DEFAULT`]. + pub const DATE_TIME_OFFSET = Config::DEFAULT; + /// An [`Iso8601`] that handles the time and UTC offset, but is otherwise the same as + /// [`Config::DEFAULT`]. + pub const TIME_OFFSET = Config::DEFAULT + .set_formatted_components(FormattedComponents::TimeOffset); +} + +/// Which components to format. +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub enum FormattedComponents { + /// The configuration can only be used for parsing. Using this to format a value is + /// unspecified behavior. + None, + /// Format only the date. + Date, + /// Format only the time. + Time, + /// Format only the UTC offset. + Offset, + /// Format the date and time. + DateTime, + /// Format the date, time, and UTC offset. + DateTimeOffset, + /// Format the time and UTC offset. + TimeOffset, +} + +/// Which format to use for the date. +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub enum DateKind { + /// Use the year-month-day format. + Calendar, + /// Use the year-week-weekday format. + Week, + /// Use the week-ordinal format. + Ordinal, +} + +/// The precision and number of decimal digits present for the time. +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub enum TimePrecision { + /// Format the hour only. Minutes, seconds, and nanoseconds will be represented with the + /// specified number of decimal digits, if any. + Hour { + #[allow(missing_docs)] + decimal_digits: Option<NonZeroU8>, + }, + /// Format the hour and minute. Seconds and nanoseconds will be represented with the specified + /// number of decimal digits, if any. + Minute { + #[allow(missing_docs)] + decimal_digits: Option<NonZeroU8>, + }, + /// Format the hour, minute, and second. Nanoseconds will be represented with the specified + /// number of decimal digits, if any. + Second { + #[allow(missing_docs)] + decimal_digits: Option<NonZeroU8>, + }, +} + +/// The precision for the UTC offset. +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub enum OffsetPrecision { + /// Format only the offset hour. Requires the offset minute to be zero. + Hour, + /// Format both the offset hour and minute. + Minute, +} + +/// Configuration for [`Iso8601`]. +// This is only used as a const generic, so there's no need to have a number of implementations on +// it. +#[allow(missing_copy_implementations)] +#[doc(alias = "EncodedConfig")] // People will likely search for `EncodedConfig`, so show them this. +#[derive(Debug)] +pub struct Config { + /// Which components, if any, will be formatted. + pub(crate) formatted_components: FormattedComponents, + /// Whether the format contains separators (such as `-` or `:`). + pub(crate) use_separators: bool, + /// Whether the year is six digits. + pub(crate) year_is_six_digits: bool, + /// The format used for the date. + pub(crate) date_kind: DateKind, + /// The precision and number of decimal digits present for the time. + pub(crate) time_precision: TimePrecision, + /// The precision for the UTC offset. + pub(crate) offset_precision: OffsetPrecision, +} + +impl Config { + /// A configuration for the [`Iso8601`] format. + /// + /// The following is the default behavior: + /// + /// - The configuration can be used for both formatting and parsing. + /// - The date, time, and UTC offset are all formatted. + /// - Separators (such as `-` and `:`) are included. + /// - The year contains four digits, such that the year must be between 0 and 9999. + /// - The date uses the calendar format. + /// - The time has precision to the second and nine decimal digits. + /// - The UTC offset has precision to the minute. + /// + /// If you need different behavior, use the setter methods on this struct. + pub const DEFAULT: Self = Self { + formatted_components: FormattedComponents::DateTimeOffset, + use_separators: true, + year_is_six_digits: false, + date_kind: DateKind::Calendar, + time_precision: TimePrecision::Second { + decimal_digits: NonZeroU8::new(9), + }, + offset_precision: OffsetPrecision::Minute, + }; + + /// A configuration that can only be used for parsing. Using this to format a value is + /// unspecified behavior. + const PARSING: Self = Self { + formatted_components: FormattedComponents::None, + use_separators: false, + year_is_six_digits: false, + date_kind: DateKind::Calendar, + time_precision: TimePrecision::Hour { + decimal_digits: None, + }, + offset_precision: OffsetPrecision::Hour, + }; + + /// Set whether the format the date, time, and/or UTC offset. + pub const fn set_formatted_components(self, formatted_components: FormattedComponents) -> Self { + Self { + formatted_components, + ..self + } + } + + /// Set whether the format contains separators (such as `-` or `:`). + pub const fn set_use_separators(self, use_separators: bool) -> Self { + Self { + use_separators, + ..self + } + } + + /// Set whether the year is six digits. + pub const fn set_year_is_six_digits(self, year_is_six_digits: bool) -> Self { + Self { + year_is_six_digits, + ..self + } + } + + /// Set the format used for the date. + pub const fn set_date_kind(self, date_kind: DateKind) -> Self { + Self { date_kind, ..self } + } + + /// Set the precision and number of decimal digits present for the time. + pub const fn set_time_precision(self, time_precision: TimePrecision) -> Self { + Self { + time_precision, + ..self + } + } + + /// Set the precision for the UTC offset. + pub const fn set_offset_precision(self, offset_precision: OffsetPrecision) -> Self { + Self { + offset_precision, + ..self + } + } +} diff --git a/vendor/time/src/format_description/well_known/iso8601/adt_hack.rs b/vendor/time/src/format_description/well_known/iso8601/adt_hack.rs new file mode 100644 index 00000000..6d3daebb --- /dev/null +++ b/vendor/time/src/format_description/well_known/iso8601/adt_hack.rs @@ -0,0 +1,247 @@ +//! Hackery to work around not being able to use ADTs in const generics on stable. + +use core::num::NonZeroU8; + +#[cfg(feature = "formatting")] +use super::Iso8601; +use super::{Config, DateKind, FormattedComponents as FC, OffsetPrecision, TimePrecision}; + +// This provides a way to include `EncodedConfig` in documentation without displaying the type it is +// aliased to. +#[doc(hidden)] +pub type DoNotRelyOnWhatThisIs = u128; + +/// An encoded [`Config`] that can be used as a const parameter to [`Iso8601`](super::Iso8601). +/// +/// The type this is aliased to must not be relied upon. It can change in any release without +/// notice. +pub type EncodedConfig = DoNotRelyOnWhatThisIs; + +#[cfg(feature = "formatting")] +impl<const CONFIG: EncodedConfig> Iso8601<CONFIG> { + /// The user-provided configuration for the ISO 8601 format. + const CONFIG: Config = Config::decode(CONFIG); + /// Whether the date should be formatted. + pub(crate) const FORMAT_DATE: bool = matches!( + Self::CONFIG.formatted_components, + FC::Date | FC::DateTime | FC::DateTimeOffset + ); + /// Whether the time should be formatted. + pub(crate) const FORMAT_TIME: bool = matches!( + Self::CONFIG.formatted_components, + FC::Time | FC::DateTime | FC::DateTimeOffset | FC::TimeOffset + ); + /// Whether the UTC offset should be formatted. + pub(crate) const FORMAT_OFFSET: bool = matches!( + Self::CONFIG.formatted_components, + FC::Offset | FC::DateTimeOffset | FC::TimeOffset + ); + /// Whether the year is six digits. + pub(crate) const YEAR_IS_SIX_DIGITS: bool = Self::CONFIG.year_is_six_digits; + /// Whether the format contains separators (such as `-` or `:`). + pub(crate) const USE_SEPARATORS: bool = Self::CONFIG.use_separators; + /// Which format to use for the date. + pub(crate) const DATE_KIND: DateKind = Self::CONFIG.date_kind; + /// The precision and number of decimal digits to use for the time. + pub(crate) const TIME_PRECISION: TimePrecision = Self::CONFIG.time_precision; + /// The precision for the UTC offset. + pub(crate) const OFFSET_PRECISION: OffsetPrecision = Self::CONFIG.offset_precision; +} + +impl Config { + /// Encode the configuration, permitting it to be used as a const parameter of [`Iso8601`]. + /// + /// The value returned by this method must only be used as a const parameter to [`Iso8601`]. Any + /// other usage is unspecified behavior. + pub const fn encode(&self) -> EncodedConfig { + let mut bytes = [0; EncodedConfig::BITS as usize / 8]; + + bytes[0] = match self.formatted_components { + FC::None => 0, + FC::Date => 1, + FC::Time => 2, + FC::Offset => 3, + FC::DateTime => 4, + FC::DateTimeOffset => 5, + FC::TimeOffset => 6, + }; + bytes[1] = self.use_separators as u8; + bytes[2] = self.year_is_six_digits as u8; + bytes[3] = match self.date_kind { + DateKind::Calendar => 0, + DateKind::Week => 1, + DateKind::Ordinal => 2, + }; + bytes[4] = match self.time_precision { + TimePrecision::Hour { .. } => 0, + TimePrecision::Minute { .. } => 1, + TimePrecision::Second { .. } => 2, + }; + bytes[5] = match self.time_precision { + TimePrecision::Hour { decimal_digits } + | TimePrecision::Minute { decimal_digits } + | TimePrecision::Second { decimal_digits } => match decimal_digits { + None => 0, + Some(decimal_digits) => decimal_digits.get(), + }, + }; + bytes[6] = match self.offset_precision { + OffsetPrecision::Hour => 0, + OffsetPrecision::Minute => 1, + }; + + EncodedConfig::from_be_bytes(bytes) + } + + /// Decode the configuration. The configuration must have been generated from + /// [`Config::encode`]. + pub(super) const fn decode(encoded: EncodedConfig) -> Self { + let bytes = encoded.to_be_bytes(); + + let formatted_components = match bytes[0] { + 0 => FC::None, + 1 => FC::Date, + 2 => FC::Time, + 3 => FC::Offset, + 4 => FC::DateTime, + 5 => FC::DateTimeOffset, + 6 => FC::TimeOffset, + _ => panic!("invalid configuration"), + }; + let use_separators = match bytes[1] { + 0 => false, + 1 => true, + _ => panic!("invalid configuration"), + }; + let year_is_six_digits = match bytes[2] { + 0 => false, + 1 => true, + _ => panic!("invalid configuration"), + }; + let date_kind = match bytes[3] { + 0 => DateKind::Calendar, + 1 => DateKind::Week, + 2 => DateKind::Ordinal, + _ => panic!("invalid configuration"), + }; + let time_precision = match bytes[4] { + 0 => TimePrecision::Hour { + decimal_digits: NonZeroU8::new(bytes[5]), + }, + 1 => TimePrecision::Minute { + decimal_digits: NonZeroU8::new(bytes[5]), + }, + 2 => TimePrecision::Second { + decimal_digits: NonZeroU8::new(bytes[5]), + }, + _ => panic!("invalid configuration"), + }; + let offset_precision = match bytes[6] { + 0 => OffsetPrecision::Hour, + 1 => OffsetPrecision::Minute, + _ => panic!("invalid configuration"), + }; + + // No `for` loops in `const fn`. + let mut idx = 7; // first unused byte + while idx < EncodedConfig::BITS as usize / 8 { + assert!(bytes[idx] == 0, "invalid configuration"); + idx += 1; + } + + Self { + formatted_components, + use_separators, + year_is_six_digits, + date_kind, + time_precision, + offset_precision, + } + } +} + +#[cfg(test)] +mod tests { + use super::*; + + macro_rules! eq { + ($a:expr, $b:expr) => {{ + let a = $a; + let b = $b; + a.formatted_components == b.formatted_components + && a.use_separators == b.use_separators + && a.year_is_six_digits == b.year_is_six_digits + && a.date_kind == b.date_kind + && a.time_precision == b.time_precision + && a.offset_precision == b.offset_precision + }}; + } + + #[test] + fn encoding_roundtrip() { + macro_rules! assert_roundtrip { + ($config:expr) => { + let config = $config; + let encoded = config.encode(); + let decoded = Config::decode(encoded); + assert!(eq!(config, decoded)); + }; + } + + assert_roundtrip!(Config::DEFAULT); + assert_roundtrip!(Config::DEFAULT.set_formatted_components(FC::None)); + assert_roundtrip!(Config::DEFAULT.set_formatted_components(FC::Date)); + assert_roundtrip!(Config::DEFAULT.set_formatted_components(FC::Time)); + assert_roundtrip!(Config::DEFAULT.set_formatted_components(FC::Offset)); + assert_roundtrip!(Config::DEFAULT.set_formatted_components(FC::DateTime)); + assert_roundtrip!(Config::DEFAULT.set_formatted_components(FC::DateTimeOffset)); + assert_roundtrip!(Config::DEFAULT.set_formatted_components(FC::TimeOffset)); + assert_roundtrip!(Config::DEFAULT.set_use_separators(false)); + assert_roundtrip!(Config::DEFAULT.set_use_separators(true)); + assert_roundtrip!(Config::DEFAULT.set_year_is_six_digits(false)); + assert_roundtrip!(Config::DEFAULT.set_year_is_six_digits(true)); + assert_roundtrip!(Config::DEFAULT.set_date_kind(DateKind::Calendar)); + assert_roundtrip!(Config::DEFAULT.set_date_kind(DateKind::Week)); + assert_roundtrip!(Config::DEFAULT.set_date_kind(DateKind::Ordinal)); + assert_roundtrip!(Config::DEFAULT.set_time_precision(TimePrecision::Hour { + decimal_digits: None, + })); + assert_roundtrip!(Config::DEFAULT.set_time_precision(TimePrecision::Minute { + decimal_digits: None, + })); + assert_roundtrip!(Config::DEFAULT.set_time_precision(TimePrecision::Second { + decimal_digits: None, + })); + assert_roundtrip!(Config::DEFAULT.set_time_precision(TimePrecision::Hour { + decimal_digits: NonZeroU8::new(1), + })); + assert_roundtrip!(Config::DEFAULT.set_time_precision(TimePrecision::Minute { + decimal_digits: NonZeroU8::new(1), + })); + assert_roundtrip!(Config::DEFAULT.set_time_precision(TimePrecision::Second { + decimal_digits: NonZeroU8::new(1), + })); + assert_roundtrip!(Config::DEFAULT.set_offset_precision(OffsetPrecision::Hour)); + assert_roundtrip!(Config::DEFAULT.set_offset_precision(OffsetPrecision::Minute)); + } + + macro_rules! assert_decode_fail { + ($encoding:expr) => { + assert!(std::panic::catch_unwind(|| { + Config::decode($encoding); + }) + .is_err()); + }; + } + + #[test] + fn decode_fail() { + assert_decode_fail!(0x07_00_00_00_00_00_00_00_00_00_00_00_00_00_00_00); + assert_decode_fail!(0x00_02_00_00_00_00_00_00_00_00_00_00_00_00_00_00); + assert_decode_fail!(0x00_00_02_00_00_00_00_00_00_00_00_00_00_00_00_00); + assert_decode_fail!(0x00_00_00_03_00_00_00_00_00_00_00_00_00_00_00_00); + assert_decode_fail!(0x00_00_00_00_03_00_00_00_00_00_00_00_00_00_00_00); + assert_decode_fail!(0x00_00_00_00_00_00_02_00_00_00_00_00_00_00_00_00); + assert_decode_fail!(0x00_00_00_00_00_00_00_01_00_00_00_00_00_00_00_00); + } +} diff --git a/vendor/time/src/format_description/well_known/rfc2822.rs b/vendor/time/src/format_description/well_known/rfc2822.rs new file mode 100644 index 00000000..3c890ab1 --- /dev/null +++ b/vendor/time/src/format_description/well_known/rfc2822.rs @@ -0,0 +1,30 @@ +//! The format described in RFC 2822. + +/// The format described in [RFC 2822](https://tools.ietf.org/html/rfc2822#section-3.3). +/// +/// Example: Fri, 21 Nov 1997 09:55:06 -0600 +/// +/// # Examples +#[cfg_attr(feature = "parsing", doc = "```rust")] +#[cfg_attr(not(feature = "parsing"), doc = "```rust,ignore")] +/// # use time::{format_description::well_known::Rfc2822, OffsetDateTime}; +/// use time_macros::datetime; +/// assert_eq!( +/// OffsetDateTime::parse("Sat, 12 Jun 1993 13:25:19 GMT", &Rfc2822)?, +/// datetime!(1993-06-12 13:25:19 +00:00) +/// ); +/// # Ok::<_, time::Error>(()) +/// ``` +/// +#[cfg_attr(feature = "formatting", doc = "```rust")] +#[cfg_attr(not(feature = "formatting"), doc = "```rust,ignore")] +/// # use time::format_description::well_known::Rfc2822; +/// # use time_macros::datetime; +/// assert_eq!( +/// datetime!(1997-11-21 09:55:06 -06:00).format(&Rfc2822)?, +/// "Fri, 21 Nov 1997 09:55:06 -0600" +/// ); +/// # Ok::<_, time::Error>(()) +/// ``` +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub struct Rfc2822; diff --git a/vendor/time/src/format_description/well_known/rfc3339.rs b/vendor/time/src/format_description/well_known/rfc3339.rs new file mode 100644 index 00000000..f0873cba --- /dev/null +++ b/vendor/time/src/format_description/well_known/rfc3339.rs @@ -0,0 +1,30 @@ +//! The format described in RFC 3339. + +/// The format described in [RFC 3339](https://tools.ietf.org/html/rfc3339#section-5.6). +/// +/// Format example: 1985-04-12T23:20:50.52Z +/// +/// # Examples +#[cfg_attr(feature = "parsing", doc = "```rust")] +#[cfg_attr(not(feature = "parsing"), doc = "```rust,ignore")] +/// # use time::{format_description::well_known::Rfc3339, OffsetDateTime}; +/// # use time_macros::datetime; +/// assert_eq!( +/// OffsetDateTime::parse("1985-04-12T23:20:50.52Z", &Rfc3339)?, +/// datetime!(1985-04-12 23:20:50.52 +00:00) +/// ); +/// # Ok::<_, time::Error>(()) +/// ``` +/// +#[cfg_attr(feature = "formatting", doc = "```rust")] +#[cfg_attr(not(feature = "formatting"), doc = "```rust,ignore")] +/// # use time::format_description::well_known::Rfc3339; +/// # use time_macros::datetime; +/// assert_eq!( +/// datetime!(1985-04-12 23:20:50.52 +00:00).format(&Rfc3339)?, +/// "1985-04-12T23:20:50.52Z" +/// ); +/// # Ok::<_, time::Error>(()) +/// ``` +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub struct Rfc3339; |