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//! Simple time handling. //! //! ![rustc 1.40.0](https://img.shields.io/badge/rustc-1.40.0-blue) //! //! # Feature flags in Cargo //! //! ## `std` //! //! Currently, all structs except `Instant` can be used with `#![no_std]`. As //! support for the standard library is enabled by default, you muse use //! `default_features = false` in your `Cargo.toml` to enable this. //! //! ```toml //! [dependencies] //! time = { version = "0.2", default-features = false } //! ``` //! //! Of the structs that are usable, some methods may only be enabled due a //! reliance on `Instant`. These will be indicated in the documentation. //! //! ## `serde` //! //! [Serde](https://github.com/serde-rs/serde) support is behind a feature flag. //! To enable it, use the `serde` feature. This is not enabled by default. It //! _is_ compatible with `#![no_std]`, so long as an allocator is present. //! //! With the standard library: //! ```toml //! [dependencies] //! time = { version = "0.2", features = ["serde"] } //! ``` //! //! With `#![no_std]` support: //! ```toml //! [dependencies] //! time = { version = "0.2", default-features = false, features = ["serde"] } //! ``` //! //! ## `deprecated` //! //! Using the `deprecated` feature allows using deprecated methods. Enabled by //! default. //! //! With the standard library, the normal `time = 0.2` will work as expected. //! //! With `#![no_std]` support: //! ```toml //! [dependencies] //! time = { version = "0.2", default-features = false, features = ["deprecated"] } //! ``` //! //! ## `panicking-api` //! //! Non-panicking APIs are provided, and should generally be preferred. However, //! there are some situations where avoiding `.unwrap()` may be desired. To //! enable these APIs, you need to use the `panicking-api` feature in your //! `Cargo.toml`, which is not enabled by default. //! //! Library authors should avoid using this feature. //! //! ```toml //! [dependencies] //! time = { version = "0.2", features = ["panicking-api"] } //! ``` //! //! # Formatting //! //! Time's formatting behavior is based on `strftime` in C, though it is //! explicitly _not_ compatible. Specifiers may be missing, added, or have //! different behavior than in C. As such, you should use the table below, which //! is an up-to-date reference on what each specifier does. //! //! | Specifier | Replaced by | Example | //! |-----------|------------------------------------------------------------------------|----------------------------| //! | `%a` | Abbreviated weekday name | `Thu` | //! | `%A` | Full weekday name | `Thursday` | //! | `%b` | Abbreviated month name | `Aug` | //! | `%B` | Full month name | `August` | //! | `%c` | Date and time representation, equivalent to `%a %b %-d %-H:%M:%S %-Y` | `Thu Aug 23 14:55:02 2001` | //! | `%C` | Year divided by 100 and truncated to integer (`00`-`99`) | `20` | //! | `%d` | Day of the month, zero-padded (`01`-`31`) | `23` | //! | `%D` | Short MM/DD/YY date, equivalent to `%-m/%d/%y` | `8/23/01` | //! | `%F` | Short YYYY-MM-DD date, equivalent to `%-Y-%m-%d` | `2001-08-23` | //! | `%g` | Week-based year, last two digits (`00`-`99`) | `01` | //! | `%G` | Week-based year | `2001` | //! | `%H` | Hour in 24h format (`00`-`23`) | `14` | //! | `%I` | Hour in 12h format (`01`-`12`) | `02` | //! | `%j` | Day of the year (`001`-`366`) | `235` | //! | `%m` | Month as a decimal number (`01`-`12`) | `08` | //! | `%M` | Minute (`00`-`59`) | `55` | //! | `%p` | `am` or `pm` designation | `pm` | //! | `%P` | `AM` or `PM` designation | `PM` | //! | `%r` | 12-hour clock time, equivalent to `%-I:%M:%S %p` | `2:55:02 pm` | //! | `%R` | 24-hour HH:MM time, equivalent to `%-H:%M` | `14:55` | //! | `%S` | Second (`00`-`59`) | `02` | //! | `%T` | ISO 8601 time format (HH:MM:SS), equivalent to `%-H:%M:%S` | `14:55:02` | //! | `%u` | ISO 8601 weekday as number with Monday as 1 (`1`-`7`) | `4` | //! | `%U` | Week number with the first Sunday as the start of week one (`00`-`53`) | `33` | //! | `%V` | ISO 8601 week number (`01`-`53`) | `34` | //! | `%w` | Weekday as a decimal number with Sunday as 0 (`0`-`6`) | `4` | //! | `%W` | Week number with the first Monday as the start of week one (`00`-`53`) | `34` | //! | `%y` | Year, last two digits (`00`-`99`) | `01` | //! | `%Y` | Full year, including `+` if ≥10,000 | `2001` | //! | `%z` | ISO 8601 offset from UTC in timezone (+HHMM) | `+0100` | //! | `%%` | Literal `%` | `%` | //! //! ## Modifiers //! //! All specifiers that are strictly numerical have modifiers for formatting. //! Adding a modifier to a non-supporting specifier is a no-op. //! //! <!-- rust-lang/rust#65613 --> //! <style>.docblock code { white-space: pre-wrap; }</style> //! //! | Modifier | Behavior | Example | //! |------------------|-----------------|---------------| //! | `-` (dash) | No padding | `%-d` => `5` | //! | `_` (underscore) | Pad with spaces | `%_d` => ` 5` | //! | `0` | Pad with zeros | `%0d` => `05` | #![cfg_attr(doc, feature(doc_cfg))] #![cfg_attr(not(feature = "std"), no_std)] #![forbid(unsafe_code)] #![deny( anonymous_parameters, rust_2018_idioms, trivial_casts, trivial_numeric_casts, unreachable_pub, // some known bugs that are overridden const_err, illegal_floating_point_literal_pattern, late_bound_lifetime_arguments, path_statements, patterns_in_fns_without_body, clippy::all )] #![warn( unused_extern_crates, missing_copy_implementations, missing_debug_implementations, single_use_lifetimes, unused_qualifications, variant_size_differences, clippy::pedantic, clippy::nursery, clippy::missing_docs_in_private_items, clippy::dbg_macro, clippy::decimal_literal_representation, clippy::get_unwrap, clippy::option_unwrap_used, clippy::print_stdout, clippy::result_unwrap_used )] #![allow( clippy::suspicious_arithmetic_impl, clippy::inline_always, clippy::cast_possible_wrap, clippy::cast_lossless, clippy::module_name_repetitions, clippy::must_use_candidate // rust-lang/rust-clippy#4779 )] #![cfg_attr(test, allow(clippy::cognitive_complexity, clippy::too_many_lines))] #![doc(html_favicon_url = "https://avatars0.githubusercontent.com/u/55999857")] #![doc(html_logo_url = "https://avatars0.githubusercontent.com/u/55999857")] #[macro_use] extern crate alloc; #[cfg(feature = "panicking-api")] #[cfg_attr(doc, doc(cfg(feature = "panicking-api")))] macro_rules! format_conditional { ($conditional:ident) => { format!(concat!(stringify!($conditional), "={}"), $conditional) }; ($first_conditional:ident, $($conditional:ident),*) => {{ let mut s = alloc::string::String::new(); s.push_str(&format_conditional!($first_conditional)); $(s.push_str(&format!(concat!(", ", stringify!($conditional), "={}"), $conditional));)* s }} } /// Panic if the value is not in range. #[cfg(feature = "panicking-api")] #[cfg_attr(doc, doc(cfg(feature = "panicking-api")))] macro_rules! assert_value_in_range { ($value:ident in $start:expr => $end:expr) => { if !($start..=$end).contains(&$value) { panic!( concat!(stringify!($value), " must be in the range {}..={} (was {})"), $start, $end, $value, ); } }; ($value:ident in $start:expr => $end:expr, given $($conditional:ident),+ $(,)?) => { if !($start..=$end).contains(&$value) { panic!( concat!(stringify!($value), " must be in the range {}..={} given{} (was {})"), $start, $end, &format_conditional!($($conditional),+), $value, ); }; }; } // TODO Some of the formatting can likely be performed at compile-time. /// Returns `None` if the value is not in range. macro_rules! ensure_value_in_range { ($value:ident in $start:expr => $end:expr) => { if !($start..=$end).contains(&$value) { return Err(ComponentRangeError { name: stringify!($value), minimum: i64::from($start), maximum: i64::from($end), value: i64::from($value), given: Vec::new(), }); } }; ($value:ident in $start:expr => $end:expr, given $($conditional:ident),+ $(,)?) => { if !($start..=$end).contains(&$value) { return Err(ComponentRangeError { name: stringify!($value), minimum: i64::from($start), maximum: i64::from($end), value: i64::from($value), given: vec![$((stringify!($conditional), i64::from($conditional))),+], }); }; }; } #[cfg(all(test, feature = "std"))] macro_rules! assert_panics { ($e:expr $(, $message:literal)?) => { #[allow(box_pointers)] { if std::panic::catch_unwind(move || $e).is_ok() { panic!(concat!( "assertion failed: expected `", stringify!($e), "` to panic", $(concat!(" (", $message, ")"))? )); } } }; } /// The `Date` struct and its associated `impl`s. mod date; /// The `Duration` struct and its associated `impl`s. mod duration; /// Various error types returned by methods in the time crate. mod error; mod format; /// The `Instant` struct and its associated `impl`s. #[cfg(feature = "std")] mod instant; pub mod internals; /// A collection of traits extending built-in numerical types. mod numerical_traits; /// The `OffsetDateTime` struct and its associated `impl`s. mod offset_date_time; /// The `PrimitiveDateTime` struct and its associated `impl`s. mod primitive_date_time; #[cfg(feature = "serde")] mod serde; /// The `Sign` struct and its associated `impl`s. mod sign; /// The `Time` struct and its associated `impl`s. mod time; /// The `UtcOffset` struct and its associated `impl`s. mod utc_offset; /// Days of the week. mod weekday; pub use self::time::Time; pub use date::{days_in_year, is_leap_year, weeks_in_year, Date}; pub use duration::Duration; pub use error::{ComponentRangeError, ConversionRangeError, Error}; pub(crate) use format::DeferredFormat; pub use format::{validate_format_string, ParseError}; #[cfg(feature = "std")] pub use instant::Instant; pub use numerical_traits::{NumericalDuration, NumericalStdDuration, NumericalStdDurationShort}; pub use offset_date_time::OffsetDateTime; pub use primitive_date_time::PrimitiveDateTime; pub use sign::Sign; pub use utc_offset::UtcOffset; pub use weekday::Weekday; /// A collection of traits that are widely useful. Unlike the standard library, /// this must be explicitly imported: /// /// ```rust,no_run /// use time::prelude::*; /// ``` /// /// The prelude may grow in minor releases. Any removals will only occur in /// major releases. pub mod prelude { // Rename to `_` to avoid any potential name conflicts. pub use crate::{NumericalDuration as _, NumericalStdDuration as _}; } /// A stable alternative to [`alloc::v1::prelude`](https://doc.rust-lang.org/stable/alloc/prelude/v1/index.html). /// Useful anywhere `#![no_std]` is allowed. #[cfg(not(feature = "std"))] mod no_std_prelude { #![allow(unused_imports)] pub(crate) use alloc::{ borrow::ToOwned, boxed::Box, string::{String, ToString}, vec::Vec, }; } // For some back-compatibility, we're also implementing some deprecated types // and methods. They will be removed completely in 0.3. #[cfg(all(feature = "std", feature = "deprecated"))] #[cfg_attr(tarpaulin, skip)] #[allow(clippy::missing_docs_in_private_items)] #[deprecated(since = "0.2.0", note = "Use `Instant`")] pub type PreciseTime = Instant; #[cfg(all(feature = "std", feature = "deprecated"))] #[cfg_attr(tarpaulin, skip)] #[allow(clippy::missing_docs_in_private_items)] #[deprecated(since = "0.2.0", note = "Use `Instant`")] pub type SteadyTime = Instant; #[cfg(all(feature = "std", feature = "deprecated"))] #[cfg_attr(tarpaulin, skip)] #[allow(clippy::missing_docs_in_private_items)] #[deprecated( since = "0.2.0", note = "Use `PrimitiveDateTime::now() - PrimitiveDateTime::unix_epoch()` to get a `Duration` \ since a known epoch." )] #[inline] pub fn precise_time_ns() -> u64 { use core::convert::TryInto; (PrimitiveDateTime::now() - PrimitiveDateTime::unix_epoch()) .whole_nanoseconds() .try_into() .expect("You really shouldn't be using this in the year 2554...") } #[cfg(all(feature = "std", feature = "deprecated"))] #[cfg_attr(tarpaulin, skip)] #[allow(clippy::missing_docs_in_private_items)] #[deprecated( since = "0.2.0", note = "Use `PrimitiveDateTime::now() - PrimitiveDateTime::unix_epoch()` to get a `Duration` \ since a known epoch." )] #[inline] pub fn precise_time_s() -> f64 { (PrimitiveDateTime::now() - PrimitiveDateTime::unix_epoch()).as_seconds_f64() }