| <!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source of the Rust file `/root/.cargo/registry/src/github.com-1ecc6299db9ec823/chrono-0.4.26/src/naive/time/mod.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>mod.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../../SourceCodePro-Semibold.ttf.woff2"><link rel="stylesheet" href="../../../../normalize.css"><link rel="stylesheet" href="../../../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" href="../../../../ayu.css" disabled><link rel="stylesheet" href="../../../../dark.css" disabled><link rel="stylesheet" href="../../../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../../../storage.js"></script><script defer src="../../../../source-script.js"></script><script defer src="../../../../source-files.js"></script><script defer src="../../../../main.js"></script><noscript><link rel="stylesheet" href="../../../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../../../favicon.svg"></head><body class="rustdoc source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><a class="sidebar-logo" href="../../../../chrono/index.html"><div class="logo-container"><img class="rust-logo" src="../../../../rust-logo.svg" alt="logo"></div></a></nav><main><div class="width-limiter"><nav class="sub"><a class="sub-logo-container" href="../../../../chrono/index.html"><img class="rust-logo" src="../../../../rust-logo.svg" alt="logo"></a><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../../../../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../../../wheel.svg"></a></div></div></form></nav><section id="main-content" class="content"><div class="example-wrap"><pre class="src-line-numbers"><span id="1">1</span> |
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| </pre><pre class="rust"><code><span class="comment">// This is a part of Chrono. |
| // See README.md and LICENSE.txt for details. |
| |
| </span><span class="doccomment">//! ISO 8601 time without timezone. |
| |
| </span><span class="attribute">#[cfg(any(feature = <span class="string">"alloc"</span>, feature = <span class="string">"std"</span>, test))] |
| </span><span class="kw">use </span>core::borrow::Borrow; |
| <span class="kw">use </span>core::ops::{Add, AddAssign, Sub, SubAssign}; |
| <span class="kw">use </span>core::{fmt, str}; |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"rkyv"</span>)] |
| </span><span class="kw">use </span>rkyv::{Archive, Deserialize, Serialize}; |
| |
| <span class="attribute">#[cfg(any(feature = <span class="string">"alloc"</span>, feature = <span class="string">"std"</span>, test))] |
| </span><span class="kw">use </span><span class="kw">crate</span>::format::DelayedFormat; |
| <span class="kw">use </span><span class="kw">crate</span>::format::{ |
| parse, parse_and_remainder, write_hundreds, Fixed, Item, Numeric, Pad, ParseError, ParseResult, |
| Parsed, StrftimeItems, |
| }; |
| <span class="kw">use </span><span class="kw">crate</span>::oldtime::Duration <span class="kw">as </span>OldDuration; |
| <span class="kw">use </span><span class="kw">crate</span>::Timelike; |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"rustc-serialize"</span>)] |
| </span><span class="kw">mod </span>rustc_serialize; |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"serde"</span>)] |
| </span><span class="kw">mod </span>serde; |
| |
| <span class="attribute">#[cfg(test)] |
| </span><span class="kw">mod </span>tests; |
| |
| <span class="doccomment">/// ISO 8601 time without timezone. |
| /// Allows for the nanosecond precision and optional leap second representation. |
| /// |
| /// # Leap Second Handling |
| /// |
| /// Since 1960s, the manmade atomic clock has been so accurate that |
| /// it is much more accurate than Earth's own motion. |
| /// It became desirable to define the civil time in terms of the atomic clock, |
| /// but that risks the desynchronization of the civil time from Earth. |
| /// To account for this, the designers of the Coordinated Universal Time (UTC) |
| /// made that the UTC should be kept within 0.9 seconds of the observed Earth-bound time. |
| /// When the mean solar day is longer than the ideal (86,400 seconds), |
| /// the error slowly accumulates and it is necessary to add a **leap second** |
| /// to slow the UTC down a bit. |
| /// (We may also remove a second to speed the UTC up a bit, but it never happened.) |
| /// The leap second, if any, follows 23:59:59 of June 30 or December 31 in the UTC. |
| /// |
| /// Fast forward to the 21st century, |
| /// we have seen 26 leap seconds from January 1972 to December 2015. |
| /// Yes, 26 seconds. Probably you can read this paragraph within 26 seconds. |
| /// But those 26 seconds, and possibly more in the future, are never predictable, |
| /// and whether to add a leap second or not is known only before 6 months. |
| /// Internet-based clocks (via NTP) do account for known leap seconds, |
| /// but the system API normally doesn't (and often can't, with no network connection) |
| /// and there is no reliable way to retrieve leap second information. |
| /// |
| /// Chrono does not try to accurately implement leap seconds; it is impossible. |
| /// Rather, **it allows for leap seconds but behaves as if there are *no other* leap seconds.** |
| /// Various operations will ignore any possible leap second(s) |
| /// except when any of the operands were actually leap seconds. |
| /// |
| /// If you cannot tolerate this behavior, |
| /// you must use a separate `TimeZone` for the International Atomic Time (TAI). |
| /// TAI is like UTC but has no leap seconds, and thus slightly differs from UTC. |
| /// Chrono does not yet provide such implementation, but it is planned. |
| /// |
| /// ## Representing Leap Seconds |
| /// |
| /// The leap second is indicated via fractional seconds more than 1 second. |
| /// This makes possible to treat a leap second as the prior non-leap second |
| /// if you don't care about sub-second accuracy. |
| /// You should use the proper formatting to get the raw leap second. |
| /// |
| /// All methods accepting fractional seconds will accept such values. |
| /// |
| /// ``` |
| /// use chrono::{NaiveDate, NaiveTime, Utc}; |
| /// |
| /// let t = NaiveTime::from_hms_milli_opt(8, 59, 59, 1_000).unwrap(); |
| /// |
| /// let dt1 = NaiveDate::from_ymd_opt(2015, 7, 1).unwrap().and_hms_micro_opt(8, 59, 59, 1_000_000).unwrap(); |
| /// |
| /// let dt2 = NaiveDate::from_ymd_opt(2015, 6, 30).unwrap().and_hms_nano_opt(23, 59, 59, 1_000_000_000).unwrap().and_local_timezone(Utc).unwrap(); |
| /// # let _ = (t, dt1, dt2); |
| /// ``` |
| /// |
| /// Note that the leap second can happen anytime given an appropriate time zone; |
| /// 2015-07-01 01:23:60 would be a proper leap second if UTC+01:24 had existed. |
| /// Practically speaking, though, by the time of the first leap second on 1972-06-30, |
| /// every time zone offset around the world has standardized to the 5-minute alignment. |
| /// |
| /// ## Date And Time Arithmetics |
| /// |
| /// As a concrete example, let's assume that `03:00:60` and `04:00:60` are leap seconds. |
| /// In reality, of course, leap seconds are separated by at least 6 months. |
| /// We will also use some intuitive concise notations for the explanation. |
| /// |
| /// `Time + Duration` |
| /// (short for [`NaiveTime::overflowing_add_signed`](#method.overflowing_add_signed)): |
| /// |
| /// - `03:00:00 + 1s = 03:00:01`. |
| /// - `03:00:59 + 60s = 03:02:00`. |
| /// - `03:00:59 + 1s = 03:01:00`. |
| /// - `03:00:60 + 1s = 03:01:00`. |
| /// Note that the sum is identical to the previous. |
| /// - `03:00:60 + 60s = 03:01:59`. |
| /// - `03:00:60 + 61s = 03:02:00`. |
| /// - `03:00:60.1 + 0.8s = 03:00:60.9`. |
| /// |
| /// `Time - Duration` |
| /// (short for [`NaiveTime::overflowing_sub_signed`](#method.overflowing_sub_signed)): |
| /// |
| /// - `03:00:00 - 1s = 02:59:59`. |
| /// - `03:01:00 - 1s = 03:00:59`. |
| /// - `03:01:00 - 60s = 03:00:00`. |
| /// - `03:00:60 - 60s = 03:00:00`. |
| /// Note that the result is identical to the previous. |
| /// - `03:00:60.7 - 0.4s = 03:00:60.3`. |
| /// - `03:00:60.7 - 0.9s = 03:00:59.8`. |
| /// |
| /// `Time - Time` |
| /// (short for [`NaiveTime::signed_duration_since`](#method.signed_duration_since)): |
| /// |
| /// - `04:00:00 - 03:00:00 = 3600s`. |
| /// - `03:01:00 - 03:00:00 = 60s`. |
| /// - `03:00:60 - 03:00:00 = 60s`. |
| /// Note that the difference is identical to the previous. |
| /// - `03:00:60.6 - 03:00:59.4 = 1.2s`. |
| /// - `03:01:00 - 03:00:59.8 = 0.2s`. |
| /// - `03:01:00 - 03:00:60.5 = 0.5s`. |
| /// Note that the difference is larger than the previous, |
| /// even though the leap second clearly follows the previous whole second. |
| /// - `04:00:60.9 - 03:00:60.1 = |
| /// (04:00:60.9 - 04:00:00) + (04:00:00 - 03:01:00) + (03:01:00 - 03:00:60.1) = |
| /// 60.9s + 3540s + 0.9s = 3601.8s`. |
| /// |
| /// In general, |
| /// |
| /// - `Time + Duration` unconditionally equals to `Duration + Time`. |
| /// |
| /// - `Time - Duration` unconditionally equals to `Time + (-Duration)`. |
| /// |
| /// - `Time1 - Time2` unconditionally equals to `-(Time2 - Time1)`. |
| /// |
| /// - Associativity does not generally hold, because |
| /// `(Time + Duration1) - Duration2` no longer equals to `Time + (Duration1 - Duration2)` |
| /// for two positive durations. |
| /// |
| /// - As a special case, `(Time + Duration) - Duration` also does not equal to `Time`. |
| /// |
| /// - If you can assume that all durations have the same sign, however, |
| /// then the associativity holds: |
| /// `(Time + Duration1) + Duration2` equals to `Time + (Duration1 + Duration2)` |
| /// for two positive durations. |
| /// |
| /// ## Reading And Writing Leap Seconds |
| /// |
| /// The "typical" leap seconds on the minute boundary are |
| /// correctly handled both in the formatting and parsing. |
| /// The leap second in the human-readable representation |
| /// will be represented as the second part being 60, as required by ISO 8601. |
| /// |
| /// ``` |
| /// use chrono::{Utc, NaiveDate}; |
| /// |
| /// let dt = NaiveDate::from_ymd_opt(2015, 6, 30).unwrap().and_hms_milli_opt(23, 59, 59, 1_000).unwrap().and_local_timezone(Utc).unwrap(); |
| /// assert_eq!(format!("{:?}", dt), "2015-06-30T23:59:60Z"); |
| /// ``` |
| /// |
| /// There are hypothetical leap seconds not on the minute boundary |
| /// nevertheless supported by Chrono. |
| /// They are allowed for the sake of completeness and consistency; |
| /// there were several "exotic" time zone offsets with fractional minutes prior to UTC after all. |
| /// For such cases the human-readable representation is ambiguous |
| /// and would be read back to the next non-leap second. |
| /// |
| /// ``` |
| /// use chrono::{DateTime, Utc, TimeZone, NaiveDate}; |
| /// |
| /// let dt = NaiveDate::from_ymd_opt(2015, 6, 30).unwrap().and_hms_milli_opt(23, 56, 4, 1_000).unwrap().and_local_timezone(Utc).unwrap(); |
| /// assert_eq!(format!("{:?}", dt), "2015-06-30T23:56:05Z"); |
| /// |
| /// let dt = Utc.with_ymd_and_hms(2015, 6, 30, 23, 56, 5).unwrap(); |
| /// assert_eq!(format!("{:?}", dt), "2015-06-30T23:56:05Z"); |
| /// assert_eq!(DateTime::parse_from_rfc3339("2015-06-30T23:56:05Z").unwrap(), dt); |
| /// ``` |
| /// |
| /// Since Chrono alone cannot determine any existence of leap seconds, |
| /// **there is absolutely no guarantee that the leap second read has actually happened**. |
| </span><span class="attribute">#[derive(PartialEq, Eq, Hash, PartialOrd, Ord, Copy, Clone)] |
| #[cfg_attr(feature = <span class="string">"rkyv"</span>, derive(Archive, Deserialize, Serialize))] |
| </span><span class="kw">pub struct </span>NaiveTime { |
| secs: u32, |
| frac: u32, |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"arbitrary"</span>)] |
| </span><span class="kw">impl </span>arbitrary::Arbitrary<<span class="lifetime">'_</span>> <span class="kw">for </span>NaiveTime { |
| <span class="kw">fn </span>arbitrary(u: <span class="kw-2">&mut </span>arbitrary::Unstructured) -> arbitrary::Result<NaiveTime> { |
| <span class="kw">let </span>secs = u.int_in_range(<span class="number">0</span>..=<span class="number">86_399</span>)<span class="question-mark">?</span>; |
| <span class="kw">let </span>nano = u.int_in_range(<span class="number">0</span>..=<span class="number">1_999_999_999</span>)<span class="question-mark">?</span>; |
| <span class="kw">let </span>time = NaiveTime::from_num_seconds_from_midnight_opt(secs, nano) |
| .expect(<span class="string">"Could not generate a valid chrono::NaiveTime. It looks like implementation of Arbitrary for NaiveTime is erroneous."</span>); |
| <span class="prelude-val">Ok</span>(time) |
| } |
| } |
| |
| <span class="kw">impl </span>NaiveTime { |
| <span class="doccomment">/// Makes a new `NaiveTime` from hour, minute and second. |
| /// |
| /// No [leap second](#leap-second-handling) is allowed here; |
| /// use `NaiveTime::from_hms_*` methods with a subsecond parameter instead. |
| /// |
| /// Panics on invalid hour, minute and/or second. |
| </span><span class="attribute">#[deprecated(since = <span class="string">"0.4.23"</span>, note = <span class="string">"use `from_hms_opt()` instead"</span>)] |
| #[inline] |
| #[must_use] |
| </span><span class="kw">pub fn </span>from_hms(hour: u32, min: u32, sec: u32) -> NaiveTime { |
| NaiveTime::from_hms_opt(hour, min, sec).expect(<span class="string">"invalid time"</span>) |
| } |
| |
| <span class="doccomment">/// Makes a new `NaiveTime` from hour, minute and second. |
| /// |
| /// No [leap second](#leap-second-handling) is allowed here; |
| /// use `NaiveTime::from_hms_*_opt` methods with a subsecond parameter instead. |
| /// |
| /// Returns `None` on invalid hour, minute and/or second. |
| /// |
| /// # Example |
| /// |
| /// ``` |
| /// use chrono::NaiveTime; |
| /// |
| /// let from_hms_opt = NaiveTime::from_hms_opt; |
| /// |
| /// assert!(from_hms_opt(0, 0, 0).is_some()); |
| /// assert!(from_hms_opt(23, 59, 59).is_some()); |
| /// assert!(from_hms_opt(24, 0, 0).is_none()); |
| /// assert!(from_hms_opt(23, 60, 0).is_none()); |
| /// assert!(from_hms_opt(23, 59, 60).is_none()); |
| /// ``` |
| </span><span class="attribute">#[inline] |
| #[must_use] |
| </span><span class="kw">pub const fn </span>from_hms_opt(hour: u32, min: u32, sec: u32) -> <span class="prelude-ty">Option</span><NaiveTime> { |
| NaiveTime::from_hms_nano_opt(hour, min, sec, <span class="number">0</span>) |
| } |
| |
| <span class="doccomment">/// Makes a new `NaiveTime` from hour, minute, second and millisecond. |
| /// |
| /// The millisecond part can exceed 1,000 |
| /// in order to represent the [leap second](#leap-second-handling). |
| /// |
| /// Panics on invalid hour, minute, second and/or millisecond. |
| </span><span class="attribute">#[deprecated(since = <span class="string">"0.4.23"</span>, note = <span class="string">"use `from_hms_milli_opt()` instead"</span>)] |
| #[inline] |
| #[must_use] |
| </span><span class="kw">pub fn </span>from_hms_milli(hour: u32, min: u32, sec: u32, milli: u32) -> NaiveTime { |
| NaiveTime::from_hms_milli_opt(hour, min, sec, milli).expect(<span class="string">"invalid time"</span>) |
| } |
| |
| <span class="doccomment">/// Makes a new `NaiveTime` from hour, minute, second and millisecond. |
| /// |
| /// The millisecond part can exceed 1,000 |
| /// in order to represent the [leap second](#leap-second-handling). |
| /// |
| /// Returns `None` on invalid hour, minute, second and/or millisecond. |
| /// |
| /// # Example |
| /// |
| /// ``` |
| /// use chrono::NaiveTime; |
| /// |
| /// let from_hmsm_opt = NaiveTime::from_hms_milli_opt; |
| /// |
| /// assert!(from_hmsm_opt(0, 0, 0, 0).is_some()); |
| /// assert!(from_hmsm_opt(23, 59, 59, 999).is_some()); |
| /// assert!(from_hmsm_opt(23, 59, 59, 1_999).is_some()); // a leap second after 23:59:59 |
| /// assert!(from_hmsm_opt(24, 0, 0, 0).is_none()); |
| /// assert!(from_hmsm_opt(23, 60, 0, 0).is_none()); |
| /// assert!(from_hmsm_opt(23, 59, 60, 0).is_none()); |
| /// assert!(from_hmsm_opt(23, 59, 59, 2_000).is_none()); |
| /// ``` |
| </span><span class="attribute">#[inline] |
| #[must_use] |
| </span><span class="kw">pub fn </span>from_hms_milli_opt(hour: u32, min: u32, sec: u32, milli: u32) -> <span class="prelude-ty">Option</span><NaiveTime> { |
| milli |
| .checked_mul(<span class="number">1_000_000</span>) |
| .and_then(|nano| NaiveTime::from_hms_nano_opt(hour, min, sec, nano)) |
| } |
| |
| <span class="doccomment">/// Makes a new `NaiveTime` from hour, minute, second and microsecond. |
| /// |
| /// The microsecond part can exceed 1,000,000 |
| /// in order to represent the [leap second](#leap-second-handling). |
| /// |
| /// Panics on invalid hour, minute, second and/or microsecond. |
| </span><span class="attribute">#[deprecated(since = <span class="string">"0.4.23"</span>, note = <span class="string">"use `from_hms_micro_opt()` instead"</span>)] |
| #[inline] |
| #[must_use] |
| </span><span class="kw">pub fn </span>from_hms_micro(hour: u32, min: u32, sec: u32, micro: u32) -> NaiveTime { |
| NaiveTime::from_hms_micro_opt(hour, min, sec, micro).expect(<span class="string">"invalid time"</span>) |
| } |
| |
| <span class="doccomment">/// Makes a new `NaiveTime` from hour, minute, second and microsecond. |
| /// |
| /// The microsecond part can exceed 1,000,000 |
| /// in order to represent the [leap second](#leap-second-handling). |
| /// |
| /// Returns `None` on invalid hour, minute, second and/or microsecond. |
| /// |
| /// # Example |
| /// |
| /// ``` |
| /// use chrono::NaiveTime; |
| /// |
| /// let from_hmsu_opt = NaiveTime::from_hms_micro_opt; |
| /// |
| /// assert!(from_hmsu_opt(0, 0, 0, 0).is_some()); |
| /// assert!(from_hmsu_opt(23, 59, 59, 999_999).is_some()); |
| /// assert!(from_hmsu_opt(23, 59, 59, 1_999_999).is_some()); // a leap second after 23:59:59 |
| /// assert!(from_hmsu_opt(24, 0, 0, 0).is_none()); |
| /// assert!(from_hmsu_opt(23, 60, 0, 0).is_none()); |
| /// assert!(from_hmsu_opt(23, 59, 60, 0).is_none()); |
| /// assert!(from_hmsu_opt(23, 59, 59, 2_000_000).is_none()); |
| /// ``` |
| </span><span class="attribute">#[inline] |
| #[must_use] |
| </span><span class="kw">pub fn </span>from_hms_micro_opt(hour: u32, min: u32, sec: u32, micro: u32) -> <span class="prelude-ty">Option</span><NaiveTime> { |
| micro.checked_mul(<span class="number">1_000</span>).and_then(|nano| NaiveTime::from_hms_nano_opt(hour, min, sec, nano)) |
| } |
| |
| <span class="doccomment">/// Makes a new `NaiveTime` from hour, minute, second and nanosecond. |
| /// |
| /// The nanosecond part can exceed 1,000,000,000 |
| /// in order to represent the [leap second](#leap-second-handling). |
| /// |
| /// Panics on invalid hour, minute, second and/or nanosecond. |
| </span><span class="attribute">#[deprecated(since = <span class="string">"0.4.23"</span>, note = <span class="string">"use `from_hms_nano_opt()` instead"</span>)] |
| #[inline] |
| #[must_use] |
| </span><span class="kw">pub fn </span>from_hms_nano(hour: u32, min: u32, sec: u32, nano: u32) -> NaiveTime { |
| NaiveTime::from_hms_nano_opt(hour, min, sec, nano).expect(<span class="string">"invalid time"</span>) |
| } |
| |
| <span class="doccomment">/// Makes a new `NaiveTime` from hour, minute, second and nanosecond. |
| /// |
| /// The nanosecond part can exceed 1,000,000,000 |
| /// in order to represent the [leap second](#leap-second-handling). |
| /// |
| /// Returns `None` on invalid hour, minute, second and/or nanosecond. |
| /// |
| /// # Example |
| /// |
| /// ``` |
| /// use chrono::NaiveTime; |
| /// |
| /// let from_hmsn_opt = NaiveTime::from_hms_nano_opt; |
| /// |
| /// assert!(from_hmsn_opt(0, 0, 0, 0).is_some()); |
| /// assert!(from_hmsn_opt(23, 59, 59, 999_999_999).is_some()); |
| /// assert!(from_hmsn_opt(23, 59, 59, 1_999_999_999).is_some()); // a leap second after 23:59:59 |
| /// assert!(from_hmsn_opt(24, 0, 0, 0).is_none()); |
| /// assert!(from_hmsn_opt(23, 60, 0, 0).is_none()); |
| /// assert!(from_hmsn_opt(23, 59, 60, 0).is_none()); |
| /// assert!(from_hmsn_opt(23, 59, 59, 2_000_000_000).is_none()); |
| /// ``` |
| </span><span class="attribute">#[inline] |
| #[must_use] |
| </span><span class="kw">pub const fn </span>from_hms_nano_opt(hour: u32, min: u32, sec: u32, nano: u32) -> <span class="prelude-ty">Option</span><NaiveTime> { |
| <span class="kw">if </span>hour >= <span class="number">24 </span>|| min >= <span class="number">60 </span>|| sec >= <span class="number">60 </span>|| nano >= <span class="number">2_000_000_000 </span>{ |
| <span class="kw">return </span><span class="prelude-val">None</span>; |
| } |
| <span class="kw">let </span>secs = hour * <span class="number">3600 </span>+ min * <span class="number">60 </span>+ sec; |
| <span class="prelude-val">Some</span>(NaiveTime { secs, frac: nano }) |
| } |
| |
| <span class="doccomment">/// Makes a new `NaiveTime` from the number of seconds since midnight and nanosecond. |
| /// |
| /// The nanosecond part can exceed 1,000,000,000 |
| /// in order to represent the [leap second](#leap-second-handling). |
| /// |
| /// Panics on invalid number of seconds and/or nanosecond. |
| </span><span class="attribute">#[deprecated(since = <span class="string">"0.4.23"</span>, note = <span class="string">"use `from_num_seconds_from_midnight_opt()` instead"</span>)] |
| #[inline] |
| #[must_use] |
| </span><span class="kw">pub fn </span>from_num_seconds_from_midnight(secs: u32, nano: u32) -> NaiveTime { |
| NaiveTime::from_num_seconds_from_midnight_opt(secs, nano).expect(<span class="string">"invalid time"</span>) |
| } |
| |
| <span class="doccomment">/// Makes a new `NaiveTime` from the number of seconds since midnight and nanosecond. |
| /// |
| /// The nanosecond part can exceed 1,000,000,000 |
| /// in order to represent the [leap second](#leap-second-handling). |
| /// |
| /// Returns `None` on invalid number of seconds and/or nanosecond. |
| /// |
| /// # Example |
| /// |
| /// ``` |
| /// use chrono::NaiveTime; |
| /// |
| /// let from_nsecs_opt = NaiveTime::from_num_seconds_from_midnight_opt; |
| /// |
| /// assert!(from_nsecs_opt(0, 0).is_some()); |
| /// assert!(from_nsecs_opt(86399, 999_999_999).is_some()); |
| /// assert!(from_nsecs_opt(86399, 1_999_999_999).is_some()); // a leap second after 23:59:59 |
| /// assert!(from_nsecs_opt(86_400, 0).is_none()); |
| /// assert!(from_nsecs_opt(86399, 2_000_000_000).is_none()); |
| /// ``` |
| </span><span class="attribute">#[inline] |
| #[must_use] |
| </span><span class="kw">pub const fn </span>from_num_seconds_from_midnight_opt(secs: u32, nano: u32) -> <span class="prelude-ty">Option</span><NaiveTime> { |
| <span class="kw">if </span>secs >= <span class="number">86_400 </span>|| nano >= <span class="number">2_000_000_000 </span>{ |
| <span class="kw">return </span><span class="prelude-val">None</span>; |
| } |
| <span class="prelude-val">Some</span>(NaiveTime { secs, frac: nano }) |
| } |
| |
| <span class="doccomment">/// Parses a string with the specified format string and returns a new `NaiveTime`. |
| /// See the [`format::strftime` module](../format/strftime/index.html) |
| /// on the supported escape sequences. |
| /// |
| /// # Example |
| /// |
| /// ``` |
| /// use chrono::NaiveTime; |
| /// |
| /// let parse_from_str = NaiveTime::parse_from_str; |
| /// |
| /// assert_eq!(parse_from_str("23:56:04", "%H:%M:%S"), |
| /// Ok(NaiveTime::from_hms_opt(23, 56, 4).unwrap())); |
| /// assert_eq!(parse_from_str("pm012345.6789", "%p%I%M%S%.f"), |
| /// Ok(NaiveTime::from_hms_micro_opt(13, 23, 45, 678_900).unwrap())); |
| /// ``` |
| /// |
| /// Date and offset is ignored for the purpose of parsing. |
| /// |
| /// ``` |
| /// # use chrono::NaiveTime; |
| /// # let parse_from_str = NaiveTime::parse_from_str; |
| /// assert_eq!(parse_from_str("2014-5-17T12:34:56+09:30", "%Y-%m-%dT%H:%M:%S%z"), |
| /// Ok(NaiveTime::from_hms_opt(12, 34, 56).unwrap())); |
| /// ``` |
| /// |
| /// [Leap seconds](#leap-second-handling) are correctly handled by |
| /// treating any time of the form `hh:mm:60` as a leap second. |
| /// (This equally applies to the formatting, so the round trip is possible.) |
| /// |
| /// ``` |
| /// # use chrono::NaiveTime; |
| /// # let parse_from_str = NaiveTime::parse_from_str; |
| /// assert_eq!(parse_from_str("08:59:60.123", "%H:%M:%S%.f"), |
| /// Ok(NaiveTime::from_hms_milli_opt(8, 59, 59, 1_123).unwrap())); |
| /// ``` |
| /// |
| /// Missing seconds are assumed to be zero, |
| /// but out-of-bound times or insufficient fields are errors otherwise. |
| /// |
| /// ``` |
| /// # use chrono::NaiveTime; |
| /// # let parse_from_str = NaiveTime::parse_from_str; |
| /// assert_eq!(parse_from_str("7:15", "%H:%M"), |
| /// Ok(NaiveTime::from_hms_opt(7, 15, 0).unwrap())); |
| /// |
| /// assert!(parse_from_str("04m33s", "%Mm%Ss").is_err()); |
| /// assert!(parse_from_str("12", "%H").is_err()); |
| /// assert!(parse_from_str("17:60", "%H:%M").is_err()); |
| /// assert!(parse_from_str("24:00:00", "%H:%M:%S").is_err()); |
| /// ``` |
| /// |
| /// All parsed fields should be consistent to each other, otherwise it's an error. |
| /// Here `%H` is for 24-hour clocks, unlike `%I`, |
| /// and thus can be independently determined without AM/PM. |
| /// |
| /// ``` |
| /// # use chrono::NaiveTime; |
| /// # let parse_from_str = NaiveTime::parse_from_str; |
| /// assert!(parse_from_str("13:07 AM", "%H:%M %p").is_err()); |
| /// ``` |
| </span><span class="kw">pub fn </span>parse_from_str(s: <span class="kw-2">&</span>str, fmt: <span class="kw-2">&</span>str) -> ParseResult<NaiveTime> { |
| <span class="kw">let </span><span class="kw-2">mut </span>parsed = Parsed::new(); |
| parse(<span class="kw-2">&mut </span>parsed, s, StrftimeItems::new(fmt))<span class="question-mark">?</span>; |
| parsed.to_naive_time() |
| } |
| |
| <span class="doccomment">/// Parses a string from a user-specified format into a new `NaiveTime` value, and a slice with |
| /// the remaining portion of the string. |
| /// See the [`format::strftime` module](../format/strftime/index.html) |
| /// on the supported escape sequences. |
| /// |
| /// Similar to [`parse_from_str`](#method.parse_from_str). |
| /// |
| /// # Example |
| /// |
| /// ```rust |
| /// # use chrono::{NaiveTime}; |
| /// let (time, remainder) = NaiveTime::parse_and_remainder( |
| /// "3h4m33s trailing text", "%-Hh%-Mm%-Ss").unwrap(); |
| /// assert_eq!(time, NaiveTime::from_hms_opt(3, 4, 33).unwrap()); |
| /// assert_eq!(remainder, " trailing text"); |
| /// ``` |
| </span><span class="kw">pub fn </span>parse_and_remainder<<span class="lifetime">'a</span>>(s: <span class="kw-2">&</span><span class="lifetime">'a </span>str, fmt: <span class="kw-2">&</span>str) -> ParseResult<(NaiveTime, <span class="kw-2">&</span><span class="lifetime">'a </span>str)> { |
| <span class="kw">let </span><span class="kw-2">mut </span>parsed = Parsed::new(); |
| <span class="kw">let </span>remainder = parse_and_remainder(<span class="kw-2">&mut </span>parsed, s, StrftimeItems::new(fmt))<span class="question-mark">?</span>; |
| parsed.to_naive_time().map(|t| (t, remainder)) |
| } |
| |
| <span class="doccomment">/// Adds given `Duration` to the current time, |
| /// and also returns the number of *seconds* |
| /// in the integral number of days ignored from the addition. |
| /// (We cannot return `Duration` because it is subject to overflow or underflow.) |
| /// |
| /// # Example |
| /// |
| /// ``` |
| /// use chrono::{Duration, NaiveTime}; |
| /// |
| /// let from_hms = |h, m, s| { NaiveTime::from_hms_opt(h, m, s).unwrap() }; |
| /// |
| /// assert_eq!(from_hms(3, 4, 5).overflowing_add_signed(Duration::hours(11)), |
| /// (from_hms(14, 4, 5), 0)); |
| /// assert_eq!(from_hms(3, 4, 5).overflowing_add_signed(Duration::hours(23)), |
| /// (from_hms(2, 4, 5), 86_400)); |
| /// assert_eq!(from_hms(3, 4, 5).overflowing_add_signed(Duration::hours(-7)), |
| /// (from_hms(20, 4, 5), -86_400)); |
| /// ``` |
| </span><span class="attribute">#[must_use] |
| </span><span class="kw">pub fn </span>overflowing_add_signed(<span class="kw-2">&</span><span class="self">self</span>, <span class="kw-2">mut </span>rhs: OldDuration) -> (NaiveTime, i64) { |
| <span class="kw">let </span><span class="kw-2">mut </span>secs = <span class="self">self</span>.secs; |
| <span class="kw">let </span><span class="kw-2">mut </span>frac = <span class="self">self</span>.frac; |
| |
| <span class="comment">// check if `self` is a leap second and adding `rhs` would escape that leap second. |
| // if it's the case, update `self` and `rhs` to involve no leap second; |
| // otherwise the addition immediately finishes. |
| </span><span class="kw">if </span>frac >= <span class="number">1_000_000_000 </span>{ |
| <span class="kw">let </span>rfrac = <span class="number">2_000_000_000 </span>- frac; |
| <span class="kw">if </span>rhs >= OldDuration::nanoseconds(i64::from(rfrac)) { |
| rhs = rhs - OldDuration::nanoseconds(i64::from(rfrac)); |
| secs += <span class="number">1</span>; |
| frac = <span class="number">0</span>; |
| } <span class="kw">else if </span>rhs < OldDuration::nanoseconds(-i64::from(frac)) { |
| rhs = rhs + OldDuration::nanoseconds(i64::from(frac)); |
| frac = <span class="number">0</span>; |
| } <span class="kw">else </span>{ |
| frac = (i64::from(frac) + rhs.num_nanoseconds().unwrap()) <span class="kw">as </span>u32; |
| <span class="macro">debug_assert!</span>(frac < <span class="number">2_000_000_000</span>); |
| <span class="kw">return </span>(NaiveTime { secs, frac }, <span class="number">0</span>); |
| } |
| } |
| <span class="macro">debug_assert!</span>(secs <= <span class="number">86_400</span>); |
| <span class="macro">debug_assert!</span>(frac < <span class="number">1_000_000_000</span>); |
| |
| <span class="kw">let </span>rhssecs = rhs.num_seconds(); |
| <span class="kw">let </span>rhsfrac = (rhs - OldDuration::seconds(rhssecs)).num_nanoseconds().unwrap(); |
| <span class="macro">debug_assert_eq!</span>(OldDuration::seconds(rhssecs) + OldDuration::nanoseconds(rhsfrac), rhs); |
| <span class="kw">let </span>rhssecsinday = rhssecs % <span class="number">86_400</span>; |
| <span class="kw">let </span><span class="kw-2">mut </span>morerhssecs = rhssecs - rhssecsinday; |
| <span class="kw">let </span>rhssecs = rhssecsinday <span class="kw">as </span>i32; |
| <span class="kw">let </span>rhsfrac = rhsfrac <span class="kw">as </span>i32; |
| <span class="macro">debug_assert!</span>(-<span class="number">86_400 </span>< rhssecs && rhssecs < <span class="number">86_400</span>); |
| <span class="macro">debug_assert_eq!</span>(morerhssecs % <span class="number">86_400</span>, <span class="number">0</span>); |
| <span class="macro">debug_assert!</span>(-<span class="number">1_000_000_000 </span>< rhsfrac && rhsfrac < <span class="number">1_000_000_000</span>); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>secs = secs <span class="kw">as </span>i32 + rhssecs; |
| <span class="kw">let </span><span class="kw-2">mut </span>frac = frac <span class="kw">as </span>i32 + rhsfrac; |
| <span class="macro">debug_assert!</span>(-<span class="number">86_400 </span>< secs && secs < <span class="number">2 </span>* <span class="number">86_400</span>); |
| <span class="macro">debug_assert!</span>(-<span class="number">1_000_000_000 </span>< frac && frac < <span class="number">2_000_000_000</span>); |
| |
| <span class="kw">if </span>frac < <span class="number">0 </span>{ |
| frac += <span class="number">1_000_000_000</span>; |
| secs -= <span class="number">1</span>; |
| } <span class="kw">else if </span>frac >= <span class="number">1_000_000_000 </span>{ |
| frac -= <span class="number">1_000_000_000</span>; |
| secs += <span class="number">1</span>; |
| } |
| <span class="macro">debug_assert!</span>((-<span class="number">86_400</span>..<span class="number">2 </span>* <span class="number">86_400</span>).contains(<span class="kw-2">&</span>secs)); |
| <span class="macro">debug_assert!</span>((<span class="number">0</span>..<span class="number">1_000_000_000</span>).contains(<span class="kw-2">&</span>frac)); |
| |
| <span class="kw">if </span>secs < <span class="number">0 </span>{ |
| secs += <span class="number">86_400</span>; |
| morerhssecs -= <span class="number">86_400</span>; |
| } <span class="kw">else if </span>secs >= <span class="number">86_400 </span>{ |
| secs -= <span class="number">86_400</span>; |
| morerhssecs += <span class="number">86_400</span>; |
| } |
| <span class="macro">debug_assert!</span>((<span class="number">0</span>..<span class="number">86_400</span>).contains(<span class="kw-2">&</span>secs)); |
| |
| (NaiveTime { secs: secs <span class="kw">as </span>u32, frac: frac <span class="kw">as </span>u32 }, morerhssecs) |
| } |
| |
| <span class="doccomment">/// Subtracts given `Duration` from the current time, |
| /// and also returns the number of *seconds* |
| /// in the integral number of days ignored from the subtraction. |
| /// (We cannot return `Duration` because it is subject to overflow or underflow.) |
| /// |
| /// # Example |
| /// |
| /// ``` |
| /// use chrono::{Duration, NaiveTime}; |
| /// |
| /// let from_hms = |h, m, s| { NaiveTime::from_hms_opt(h, m, s).unwrap() }; |
| /// |
| /// assert_eq!(from_hms(3, 4, 5).overflowing_sub_signed(Duration::hours(2)), |
| /// (from_hms(1, 4, 5), 0)); |
| /// assert_eq!(from_hms(3, 4, 5).overflowing_sub_signed(Duration::hours(17)), |
| /// (from_hms(10, 4, 5), 86_400)); |
| /// assert_eq!(from_hms(3, 4, 5).overflowing_sub_signed(Duration::hours(-22)), |
| /// (from_hms(1, 4, 5), -86_400)); |
| /// ``` |
| </span><span class="attribute">#[inline] |
| #[must_use] |
| </span><span class="kw">pub fn </span>overflowing_sub_signed(<span class="kw-2">&</span><span class="self">self</span>, rhs: OldDuration) -> (NaiveTime, i64) { |
| <span class="kw">let </span>(time, rhs) = <span class="self">self</span>.overflowing_add_signed(-rhs); |
| (time, -rhs) <span class="comment">// safe to negate, rhs is within +/- (2^63 / 1000) |
| </span>} |
| |
| <span class="doccomment">/// Subtracts another `NaiveTime` from the current time. |
| /// Returns a `Duration` within +/- 1 day. |
| /// This does not overflow or underflow at all. |
| /// |
| /// As a part of Chrono's [leap second handling](#leap-second-handling), |
| /// the subtraction assumes that **there is no leap second ever**, |
| /// except when any of the `NaiveTime`s themselves represents a leap second |
| /// in which case the assumption becomes that |
| /// **there are exactly one (or two) leap second(s) ever**. |
| /// |
| /// # Example |
| /// |
| /// ``` |
| /// use chrono::{Duration, NaiveTime}; |
| /// |
| /// let from_hmsm = |h, m, s, milli| { NaiveTime::from_hms_milli_opt(h, m, s, milli).unwrap() }; |
| /// let since = NaiveTime::signed_duration_since; |
| /// |
| /// assert_eq!(since(from_hmsm(3, 5, 7, 900), from_hmsm(3, 5, 7, 900)), |
| /// Duration::zero()); |
| /// assert_eq!(since(from_hmsm(3, 5, 7, 900), from_hmsm(3, 5, 7, 875)), |
| /// Duration::milliseconds(25)); |
| /// assert_eq!(since(from_hmsm(3, 5, 7, 900), from_hmsm(3, 5, 6, 925)), |
| /// Duration::milliseconds(975)); |
| /// assert_eq!(since(from_hmsm(3, 5, 7, 900), from_hmsm(3, 5, 0, 900)), |
| /// Duration::seconds(7)); |
| /// assert_eq!(since(from_hmsm(3, 5, 7, 900), from_hmsm(3, 0, 7, 900)), |
| /// Duration::seconds(5 * 60)); |
| /// assert_eq!(since(from_hmsm(3, 5, 7, 900), from_hmsm(0, 5, 7, 900)), |
| /// Duration::seconds(3 * 3600)); |
| /// assert_eq!(since(from_hmsm(3, 5, 7, 900), from_hmsm(4, 5, 7, 900)), |
| /// Duration::seconds(-3600)); |
| /// assert_eq!(since(from_hmsm(3, 5, 7, 900), from_hmsm(2, 4, 6, 800)), |
| /// Duration::seconds(3600 + 60 + 1) + Duration::milliseconds(100)); |
| /// ``` |
| /// |
| /// Leap seconds are handled, but the subtraction assumes that |
| /// there were no other leap seconds happened. |
| /// |
| /// ``` |
| /// # use chrono::{Duration, NaiveTime}; |
| /// # let from_hmsm = |h, m, s, milli| { NaiveTime::from_hms_milli_opt(h, m, s, milli).unwrap() }; |
| /// # let since = NaiveTime::signed_duration_since; |
| /// assert_eq!(since(from_hmsm(3, 0, 59, 1_000), from_hmsm(3, 0, 59, 0)), |
| /// Duration::seconds(1)); |
| /// assert_eq!(since(from_hmsm(3, 0, 59, 1_500), from_hmsm(3, 0, 59, 0)), |
| /// Duration::milliseconds(1500)); |
| /// assert_eq!(since(from_hmsm(3, 0, 59, 1_000), from_hmsm(3, 0, 0, 0)), |
| /// Duration::seconds(60)); |
| /// assert_eq!(since(from_hmsm(3, 0, 0, 0), from_hmsm(2, 59, 59, 1_000)), |
| /// Duration::seconds(1)); |
| /// assert_eq!(since(from_hmsm(3, 0, 59, 1_000), from_hmsm(2, 59, 59, 1_000)), |
| /// Duration::seconds(61)); |
| /// ``` |
| </span><span class="attribute">#[must_use] |
| </span><span class="kw">pub fn </span>signed_duration_since(<span class="self">self</span>, rhs: NaiveTime) -> OldDuration { |
| <span class="comment">// | | :leap| | | | | | | :leap| | |
| // | | : | | | | | | | : | | |
| // ----+----+-----*---+----+----+----+----+----+----+-------*-+----+---- |
| // | `rhs` | | `self` |
| // |======================================>| | |
| // | | `self.secs - rhs.secs` |`self.frac` |
| // |====>| | |======>| |
| // `rhs.frac`|========================================>| |
| // | | | `self - rhs` | | |
| |
| </span><span class="kw">use </span>core::cmp::Ordering; |
| |
| <span class="kw">let </span>secs = i64::from(<span class="self">self</span>.secs) - i64::from(rhs.secs); |
| <span class="kw">let </span>frac = i64::from(<span class="self">self</span>.frac) - i64::from(rhs.frac); |
| |
| <span class="comment">// `secs` may contain a leap second yet to be counted |
| </span><span class="kw">let </span>adjust = <span class="kw">match </span><span class="self">self</span>.secs.cmp(<span class="kw-2">&</span>rhs.secs) { |
| Ordering::Greater => i64::from(rhs.frac >= <span class="number">1_000_000_000</span>), |
| Ordering::Equal => <span class="number">0</span>, |
| Ordering::Less => { |
| <span class="kw">if </span><span class="self">self</span>.frac >= <span class="number">1_000_000_000 </span>{ |
| -<span class="number">1 |
| </span>} <span class="kw">else </span>{ |
| <span class="number">0 |
| </span>} |
| } |
| }; |
| |
| OldDuration::seconds(secs + adjust) + OldDuration::nanoseconds(frac) |
| } |
| |
| <span class="doccomment">/// Formats the time with the specified formatting items. |
| /// Otherwise it is the same as the ordinary [`format`](#method.format) method. |
| /// |
| /// The `Iterator` of items should be `Clone`able, |
| /// since the resulting `DelayedFormat` value may be formatted multiple times. |
| /// |
| /// # Example |
| /// |
| /// ``` |
| /// use chrono::NaiveTime; |
| /// use chrono::format::strftime::StrftimeItems; |
| /// |
| /// let fmt = StrftimeItems::new("%H:%M:%S"); |
| /// let t = NaiveTime::from_hms_opt(23, 56, 4).unwrap(); |
| /// assert_eq!(t.format_with_items(fmt.clone()).to_string(), "23:56:04"); |
| /// assert_eq!(t.format("%H:%M:%S").to_string(), "23:56:04"); |
| /// ``` |
| /// |
| /// The resulting `DelayedFormat` can be formatted directly via the `Display` trait. |
| /// |
| /// ``` |
| /// # use chrono::NaiveTime; |
| /// # use chrono::format::strftime::StrftimeItems; |
| /// # let fmt = StrftimeItems::new("%H:%M:%S").clone(); |
| /// # let t = NaiveTime::from_hms_opt(23, 56, 4).unwrap(); |
| /// assert_eq!(format!("{}", t.format_with_items(fmt)), "23:56:04"); |
| /// ``` |
| </span><span class="attribute">#[cfg(any(feature = <span class="string">"alloc"</span>, feature = <span class="string">"std"</span>, test))] |
| #[cfg_attr(docsrs, doc(cfg(any(feature = <span class="string">"alloc"</span>, feature = <span class="string">"std"</span>))))] |
| #[inline] |
| #[must_use] |
| </span><span class="kw">pub fn </span>format_with_items<<span class="lifetime">'a</span>, I, B>(<span class="kw-2">&</span><span class="self">self</span>, items: I) -> DelayedFormat<I> |
| <span class="kw">where |
| </span>I: Iterator<Item = B> + Clone, |
| B: Borrow<Item<<span class="lifetime">'a</span>>>, |
| { |
| DelayedFormat::new(<span class="prelude-val">None</span>, <span class="prelude-val">Some</span>(<span class="kw-2">*</span><span class="self">self</span>), items) |
| } |
| |
| <span class="doccomment">/// Formats the time with the specified format string. |
| /// See the [`format::strftime` module](../format/strftime/index.html) |
| /// on the supported escape sequences. |
| /// |
| /// This returns a `DelayedFormat`, |
| /// which gets converted to a string only when actual formatting happens. |
| /// You may use the `to_string` method to get a `String`, |
| /// or just feed it into `print!` and other formatting macros. |
| /// (In this way it avoids the redundant memory allocation.) |
| /// |
| /// A wrong format string does *not* issue an error immediately. |
| /// Rather, converting or formatting the `DelayedFormat` fails. |
| /// You are recommended to immediately use `DelayedFormat` for this reason. |
| /// |
| /// # Example |
| /// |
| /// ``` |
| /// use chrono::NaiveTime; |
| /// |
| /// let t = NaiveTime::from_hms_nano_opt(23, 56, 4, 12_345_678).unwrap(); |
| /// assert_eq!(t.format("%H:%M:%S").to_string(), "23:56:04"); |
| /// assert_eq!(t.format("%H:%M:%S%.6f").to_string(), "23:56:04.012345"); |
| /// assert_eq!(t.format("%-I:%M %p").to_string(), "11:56 PM"); |
| /// ``` |
| /// |
| /// The resulting `DelayedFormat` can be formatted directly via the `Display` trait. |
| /// |
| /// ``` |
| /// # use chrono::NaiveTime; |
| /// # let t = NaiveTime::from_hms_nano_opt(23, 56, 4, 12_345_678).unwrap(); |
| /// assert_eq!(format!("{}", t.format("%H:%M:%S")), "23:56:04"); |
| /// assert_eq!(format!("{}", t.format("%H:%M:%S%.6f")), "23:56:04.012345"); |
| /// assert_eq!(format!("{}", t.format("%-I:%M %p")), "11:56 PM"); |
| /// ``` |
| </span><span class="attribute">#[cfg(any(feature = <span class="string">"alloc"</span>, feature = <span class="string">"std"</span>, test))] |
| #[cfg_attr(docsrs, doc(cfg(any(feature = <span class="string">"alloc"</span>, feature = <span class="string">"std"</span>))))] |
| #[inline] |
| #[must_use] |
| </span><span class="kw">pub fn </span>format<<span class="lifetime">'a</span>>(<span class="kw-2">&</span><span class="self">self</span>, fmt: <span class="kw-2">&</span><span class="lifetime">'a </span>str) -> DelayedFormat<StrftimeItems<<span class="lifetime">'a</span>>> { |
| <span class="self">self</span>.format_with_items(StrftimeItems::new(fmt)) |
| } |
| |
| <span class="doccomment">/// Returns a triple of the hour, minute and second numbers. |
| </span><span class="kw">fn </span>hms(<span class="kw-2">&</span><span class="self">self</span>) -> (u32, u32, u32) { |
| <span class="kw">let </span>sec = <span class="self">self</span>.secs % <span class="number">60</span>; |
| <span class="kw">let </span>mins = <span class="self">self</span>.secs / <span class="number">60</span>; |
| <span class="kw">let </span>min = mins % <span class="number">60</span>; |
| <span class="kw">let </span>hour = mins / <span class="number">60</span>; |
| (hour, min, sec) |
| } |
| |
| <span class="doccomment">/// The earliest possible `NaiveTime` |
| </span><span class="kw">pub const </span>MIN: <span class="self">Self </span>= <span class="self">Self </span>{ secs: <span class="number">0</span>, frac: <span class="number">0 </span>}; |
| <span class="kw">pub</span>(<span class="kw">super</span>) <span class="kw">const </span>MAX: <span class="self">Self </span>= <span class="self">Self </span>{ secs: <span class="number">23 </span>* <span class="number">3600 </span>+ <span class="number">59 </span>* <span class="number">60 </span>+ <span class="number">59</span>, frac: <span class="number">999_999_999 </span>}; |
| } |
| |
| <span class="kw">impl </span>Timelike <span class="kw">for </span>NaiveTime { |
| <span class="doccomment">/// Returns the hour number from 0 to 23. |
| /// |
| /// # Example |
| /// |
| /// ``` |
| /// use chrono::{NaiveTime, Timelike}; |
| /// |
| /// assert_eq!(NaiveTime::from_hms_opt(0, 0, 0).unwrap().hour(), 0); |
| /// assert_eq!(NaiveTime::from_hms_nano_opt(23, 56, 4, 12_345_678).unwrap().hour(), 23); |
| /// ``` |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">fn </span>hour(<span class="kw-2">&</span><span class="self">self</span>) -> u32 { |
| <span class="self">self</span>.hms().<span class="number">0 |
| </span>} |
| |
| <span class="doccomment">/// Returns the minute number from 0 to 59. |
| /// |
| /// # Example |
| /// |
| /// ``` |
| /// use chrono::{NaiveTime, Timelike}; |
| /// |
| /// assert_eq!(NaiveTime::from_hms_opt(0, 0, 0).unwrap().minute(), 0); |
| /// assert_eq!(NaiveTime::from_hms_nano_opt(23, 56, 4, 12_345_678).unwrap().minute(), 56); |
| /// ``` |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">fn </span>minute(<span class="kw-2">&</span><span class="self">self</span>) -> u32 { |
| <span class="self">self</span>.hms().<span class="number">1 |
| </span>} |
| |
| <span class="doccomment">/// Returns the second number from 0 to 59. |
| /// |
| /// # Example |
| /// |
| /// ``` |
| /// use chrono::{NaiveTime, Timelike}; |
| /// |
| /// assert_eq!(NaiveTime::from_hms_opt(0, 0, 0).unwrap().second(), 0); |
| /// assert_eq!(NaiveTime::from_hms_nano_opt(23, 56, 4, 12_345_678).unwrap().second(), 4); |
| /// ``` |
| /// |
| /// This method never returns 60 even when it is a leap second. |
| /// ([Why?](#leap-second-handling)) |
| /// Use the proper [formatting method](#method.format) to get a human-readable representation. |
| /// |
| </span><span class="attribute">#[cfg_attr(not(feature = <span class="string">"std"</span>), doc = <span class="string">"```ignore"</span>)] |
| #[cfg_attr(feature = <span class="string">"std"</span>, doc = <span class="string">"```"</span>)] |
| </span><span class="doccomment">/// # use chrono::{NaiveTime, Timelike}; |
| /// let leap = NaiveTime::from_hms_milli_opt(23, 59, 59, 1_000).unwrap(); |
| /// assert_eq!(leap.second(), 59); |
| /// assert_eq!(leap.format("%H:%M:%S").to_string(), "23:59:60"); |
| /// ``` |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">fn </span>second(<span class="kw-2">&</span><span class="self">self</span>) -> u32 { |
| <span class="self">self</span>.hms().<span class="number">2 |
| </span>} |
| |
| <span class="doccomment">/// Returns the number of nanoseconds since the whole non-leap second. |
| /// The range from 1,000,000,000 to 1,999,999,999 represents |
| /// the [leap second](#leap-second-handling). |
| /// |
| /// # Example |
| /// |
| /// ``` |
| /// use chrono::{NaiveTime, Timelike}; |
| /// |
| /// assert_eq!(NaiveTime::from_hms_opt(0, 0, 0).unwrap().nanosecond(), 0); |
| /// assert_eq!(NaiveTime::from_hms_nano_opt(23, 56, 4, 12_345_678).unwrap().nanosecond(), 12_345_678); |
| /// ``` |
| /// |
| /// Leap seconds may have seemingly out-of-range return values. |
| /// You can reduce the range with `time.nanosecond() % 1_000_000_000`, or |
| /// use the proper [formatting method](#method.format) to get a human-readable representation. |
| /// |
| </span><span class="attribute">#[cfg_attr(not(feature = <span class="string">"std"</span>), doc = <span class="string">"```ignore"</span>)] |
| #[cfg_attr(feature = <span class="string">"std"</span>, doc = <span class="string">"```"</span>)] |
| </span><span class="doccomment">/// # use chrono::{NaiveTime, Timelike}; |
| /// let leap = NaiveTime::from_hms_milli_opt(23, 59, 59, 1_000).unwrap(); |
| /// assert_eq!(leap.nanosecond(), 1_000_000_000); |
| /// assert_eq!(leap.format("%H:%M:%S%.9f").to_string(), "23:59:60.000000000"); |
| /// ``` |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">fn </span>nanosecond(<span class="kw-2">&</span><span class="self">self</span>) -> u32 { |
| <span class="self">self</span>.frac |
| } |
| |
| <span class="doccomment">/// Makes a new `NaiveTime` with the hour number changed. |
| /// |
| /// Returns `None` when the resulting `NaiveTime` would be invalid. |
| /// |
| /// # Example |
| /// |
| /// ``` |
| /// use chrono::{NaiveTime, Timelike}; |
| /// |
| /// let dt = NaiveTime::from_hms_nano_opt(23, 56, 4, 12_345_678).unwrap(); |
| /// assert_eq!(dt.with_hour(7), Some(NaiveTime::from_hms_nano_opt(7, 56, 4, 12_345_678).unwrap())); |
| /// assert_eq!(dt.with_hour(24), None); |
| /// ``` |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">fn </span>with_hour(<span class="kw-2">&</span><span class="self">self</span>, hour: u32) -> <span class="prelude-ty">Option</span><NaiveTime> { |
| <span class="kw">if </span>hour >= <span class="number">24 </span>{ |
| <span class="kw">return </span><span class="prelude-val">None</span>; |
| } |
| <span class="kw">let </span>secs = hour * <span class="number">3600 </span>+ <span class="self">self</span>.secs % <span class="number">3600</span>; |
| <span class="prelude-val">Some</span>(NaiveTime { secs, ..<span class="kw-2">*</span><span class="self">self </span>}) |
| } |
| |
| <span class="doccomment">/// Makes a new `NaiveTime` with the minute number changed. |
| /// |
| /// Returns `None` when the resulting `NaiveTime` would be invalid. |
| /// |
| /// # Example |
| /// |
| /// ``` |
| /// use chrono::{NaiveTime, Timelike}; |
| /// |
| /// let dt = NaiveTime::from_hms_nano_opt(23, 56, 4, 12_345_678).unwrap(); |
| /// assert_eq!(dt.with_minute(45), Some(NaiveTime::from_hms_nano_opt(23, 45, 4, 12_345_678).unwrap())); |
| /// assert_eq!(dt.with_minute(60), None); |
| /// ``` |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">fn </span>with_minute(<span class="kw-2">&</span><span class="self">self</span>, min: u32) -> <span class="prelude-ty">Option</span><NaiveTime> { |
| <span class="kw">if </span>min >= <span class="number">60 </span>{ |
| <span class="kw">return </span><span class="prelude-val">None</span>; |
| } |
| <span class="kw">let </span>secs = <span class="self">self</span>.secs / <span class="number">3600 </span>* <span class="number">3600 </span>+ min * <span class="number">60 </span>+ <span class="self">self</span>.secs % <span class="number">60</span>; |
| <span class="prelude-val">Some</span>(NaiveTime { secs, ..<span class="kw-2">*</span><span class="self">self </span>}) |
| } |
| |
| <span class="doccomment">/// Makes a new `NaiveTime` with the second number changed. |
| /// |
| /// Returns `None` when the resulting `NaiveTime` would be invalid. |
| /// As with the [`second`](#method.second) method, |
| /// the input range is restricted to 0 through 59. |
| /// |
| /// # Example |
| /// |
| /// ``` |
| /// use chrono::{NaiveTime, Timelike}; |
| /// |
| /// let dt = NaiveTime::from_hms_nano_opt(23, 56, 4, 12_345_678).unwrap(); |
| /// assert_eq!(dt.with_second(17), Some(NaiveTime::from_hms_nano_opt(23, 56, 17, 12_345_678).unwrap())); |
| /// assert_eq!(dt.with_second(60), None); |
| /// ``` |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">fn </span>with_second(<span class="kw-2">&</span><span class="self">self</span>, sec: u32) -> <span class="prelude-ty">Option</span><NaiveTime> { |
| <span class="kw">if </span>sec >= <span class="number">60 </span>{ |
| <span class="kw">return </span><span class="prelude-val">None</span>; |
| } |
| <span class="kw">let </span>secs = <span class="self">self</span>.secs / <span class="number">60 </span>* <span class="number">60 </span>+ sec; |
| <span class="prelude-val">Some</span>(NaiveTime { secs, ..<span class="kw-2">*</span><span class="self">self </span>}) |
| } |
| |
| <span class="doccomment">/// Makes a new `NaiveTime` with nanoseconds since the whole non-leap second changed. |
| /// |
| /// Returns `None` when the resulting `NaiveTime` would be invalid. |
| /// As with the [`nanosecond`](#method.nanosecond) method, |
| /// the input range can exceed 1,000,000,000 for leap seconds. |
| /// |
| /// # Example |
| /// |
| /// ``` |
| /// use chrono::{NaiveTime, Timelike}; |
| /// |
| /// let dt = NaiveTime::from_hms_nano_opt(23, 56, 4, 12_345_678).unwrap(); |
| /// assert_eq!(dt.with_nanosecond(333_333_333), |
| /// Some(NaiveTime::from_hms_nano_opt(23, 56, 4, 333_333_333).unwrap())); |
| /// assert_eq!(dt.with_nanosecond(2_000_000_000), None); |
| /// ``` |
| /// |
| /// Leap seconds can theoretically follow *any* whole second. |
| /// The following would be a proper leap second at the time zone offset of UTC-00:03:57 |
| /// (there are several historical examples comparable to this "non-sense" offset), |
| /// and therefore is allowed. |
| /// |
| /// ``` |
| /// # use chrono::{NaiveTime, Timelike}; |
| /// # let dt = NaiveTime::from_hms_nano_opt(23, 56, 4, 12_345_678).unwrap(); |
| /// assert_eq!(dt.with_nanosecond(1_333_333_333), |
| /// Some(NaiveTime::from_hms_nano_opt(23, 56, 4, 1_333_333_333).unwrap())); |
| /// ``` |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">fn </span>with_nanosecond(<span class="kw-2">&</span><span class="self">self</span>, nano: u32) -> <span class="prelude-ty">Option</span><NaiveTime> { |
| <span class="kw">if </span>nano >= <span class="number">2_000_000_000 </span>{ |
| <span class="kw">return </span><span class="prelude-val">None</span>; |
| } |
| <span class="prelude-val">Some</span>(NaiveTime { frac: nano, ..<span class="kw-2">*</span><span class="self">self </span>}) |
| } |
| |
| <span class="doccomment">/// Returns the number of non-leap seconds past the last midnight. |
| /// |
| /// # Example |
| /// |
| /// ``` |
| /// use chrono::{NaiveTime, Timelike}; |
| /// |
| /// assert_eq!(NaiveTime::from_hms_opt(1, 2, 3).unwrap().num_seconds_from_midnight(), |
| /// 3723); |
| /// assert_eq!(NaiveTime::from_hms_nano_opt(23, 56, 4, 12_345_678).unwrap().num_seconds_from_midnight(), |
| /// 86164); |
| /// assert_eq!(NaiveTime::from_hms_milli_opt(23, 59, 59, 1_000).unwrap().num_seconds_from_midnight(), |
| /// 86399); |
| /// ``` |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">fn </span>num_seconds_from_midnight(<span class="kw-2">&</span><span class="self">self</span>) -> u32 { |
| <span class="self">self</span>.secs <span class="comment">// do not repeat the calculation! |
| </span>} |
| } |
| |
| <span class="doccomment">/// An addition of `Duration` to `NaiveTime` wraps around and never overflows or underflows. |
| /// In particular the addition ignores integral number of days. |
| /// |
| /// As a part of Chrono's [leap second handling], the addition assumes that **there is no leap |
| /// second ever**, except when the `NaiveTime` itself represents a leap second in which case the |
| /// assumption becomes that **there is exactly a single leap second ever**. |
| /// |
| /// # Example |
| /// |
| /// ``` |
| /// use chrono::{Duration, NaiveTime}; |
| /// |
| /// let from_hmsm = |h, m, s, milli| { NaiveTime::from_hms_milli_opt(h, m, s, milli).unwrap() }; |
| /// |
| /// assert_eq!(from_hmsm(3, 5, 7, 0) + Duration::zero(), from_hmsm(3, 5, 7, 0)); |
| /// assert_eq!(from_hmsm(3, 5, 7, 0) + Duration::seconds(1), from_hmsm(3, 5, 8, 0)); |
| /// assert_eq!(from_hmsm(3, 5, 7, 0) + Duration::seconds(-1), from_hmsm(3, 5, 6, 0)); |
| /// assert_eq!(from_hmsm(3, 5, 7, 0) + Duration::seconds(60 + 4), from_hmsm(3, 6, 11, 0)); |
| /// assert_eq!(from_hmsm(3, 5, 7, 0) + Duration::seconds(7*60*60 - 6*60), from_hmsm(9, 59, 7, 0)); |
| /// assert_eq!(from_hmsm(3, 5, 7, 0) + Duration::milliseconds(80), from_hmsm(3, 5, 7, 80)); |
| /// assert_eq!(from_hmsm(3, 5, 7, 950) + Duration::milliseconds(280), from_hmsm(3, 5, 8, 230)); |
| /// assert_eq!(from_hmsm(3, 5, 7, 950) + Duration::milliseconds(-980), from_hmsm(3, 5, 6, 970)); |
| /// ``` |
| /// |
| /// The addition wraps around. |
| /// |
| /// ``` |
| /// # use chrono::{Duration, NaiveTime}; |
| /// # let from_hmsm = |h, m, s, milli| { NaiveTime::from_hms_milli_opt(h, m, s, milli).unwrap() }; |
| /// assert_eq!(from_hmsm(3, 5, 7, 0) + Duration::seconds(22*60*60), from_hmsm(1, 5, 7, 0)); |
| /// assert_eq!(from_hmsm(3, 5, 7, 0) + Duration::seconds(-8*60*60), from_hmsm(19, 5, 7, 0)); |
| /// assert_eq!(from_hmsm(3, 5, 7, 0) + Duration::days(800), from_hmsm(3, 5, 7, 0)); |
| /// ``` |
| /// |
| /// Leap seconds are handled, but the addition assumes that it is the only leap second happened. |
| /// |
| /// ``` |
| /// # use chrono::{Duration, NaiveTime}; |
| /// # let from_hmsm = |h, m, s, milli| { NaiveTime::from_hms_milli_opt(h, m, s, milli).unwrap() }; |
| /// let leap = from_hmsm(3, 5, 59, 1_300); |
| /// assert_eq!(leap + Duration::zero(), from_hmsm(3, 5, 59, 1_300)); |
| /// assert_eq!(leap + Duration::milliseconds(-500), from_hmsm(3, 5, 59, 800)); |
| /// assert_eq!(leap + Duration::milliseconds(500), from_hmsm(3, 5, 59, 1_800)); |
| /// assert_eq!(leap + Duration::milliseconds(800), from_hmsm(3, 6, 0, 100)); |
| /// assert_eq!(leap + Duration::seconds(10), from_hmsm(3, 6, 9, 300)); |
| /// assert_eq!(leap + Duration::seconds(-10), from_hmsm(3, 5, 50, 300)); |
| /// assert_eq!(leap + Duration::days(1), from_hmsm(3, 5, 59, 300)); |
| /// ``` |
| /// |
| /// [leap second handling]: crate::NaiveTime#leap-second-handling |
| </span><span class="kw">impl </span>Add<OldDuration> <span class="kw">for </span>NaiveTime { |
| <span class="kw">type </span>Output = NaiveTime; |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>add(<span class="self">self</span>, rhs: OldDuration) -> NaiveTime { |
| <span class="self">self</span>.overflowing_add_signed(rhs).<span class="number">0 |
| </span>} |
| } |
| |
| <span class="kw">impl </span>AddAssign<OldDuration> <span class="kw">for </span>NaiveTime { |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>add_assign(<span class="kw-2">&mut </span><span class="self">self</span>, rhs: OldDuration) { |
| <span class="kw-2">*</span><span class="self">self </span>= <span class="self">self</span>.add(rhs); |
| } |
| } |
| |
| <span class="doccomment">/// A subtraction of `Duration` from `NaiveTime` wraps around and never overflows or underflows. |
| /// In particular the addition ignores integral number of days. |
| /// It is the same as the addition with a negated `Duration`. |
| /// |
| /// As a part of Chrono's [leap second handling], the subtraction assumes that **there is no leap |
| /// second ever**, except when the `NaiveTime` itself represents a leap second in which case the |
| /// assumption becomes that **there is exactly a single leap second ever**. |
| /// |
| /// # Example |
| /// |
| /// ``` |
| /// use chrono::{Duration, NaiveTime}; |
| /// |
| /// let from_hmsm = |h, m, s, milli| { NaiveTime::from_hms_milli_opt(h, m, s, milli).unwrap() }; |
| /// |
| /// assert_eq!(from_hmsm(3, 5, 7, 0) - Duration::zero(), from_hmsm(3, 5, 7, 0)); |
| /// assert_eq!(from_hmsm(3, 5, 7, 0) - Duration::seconds(1), from_hmsm(3, 5, 6, 0)); |
| /// assert_eq!(from_hmsm(3, 5, 7, 0) - Duration::seconds(60 + 5), from_hmsm(3, 4, 2, 0)); |
| /// assert_eq!(from_hmsm(3, 5, 7, 0) - Duration::seconds(2*60*60 + 6*60), from_hmsm(0, 59, 7, 0)); |
| /// assert_eq!(from_hmsm(3, 5, 7, 0) - Duration::milliseconds(80), from_hmsm(3, 5, 6, 920)); |
| /// assert_eq!(from_hmsm(3, 5, 7, 950) - Duration::milliseconds(280), from_hmsm(3, 5, 7, 670)); |
| /// ``` |
| /// |
| /// The subtraction wraps around. |
| /// |
| /// ``` |
| /// # use chrono::{Duration, NaiveTime}; |
| /// # let from_hmsm = |h, m, s, milli| { NaiveTime::from_hms_milli_opt(h, m, s, milli).unwrap() }; |
| /// assert_eq!(from_hmsm(3, 5, 7, 0) - Duration::seconds(8*60*60), from_hmsm(19, 5, 7, 0)); |
| /// assert_eq!(from_hmsm(3, 5, 7, 0) - Duration::days(800), from_hmsm(3, 5, 7, 0)); |
| /// ``` |
| /// |
| /// Leap seconds are handled, but the subtraction assumes that it is the only leap second happened. |
| /// |
| /// ``` |
| /// # use chrono::{Duration, NaiveTime}; |
| /// # let from_hmsm = |h, m, s, milli| { NaiveTime::from_hms_milli_opt(h, m, s, milli).unwrap() }; |
| /// let leap = from_hmsm(3, 5, 59, 1_300); |
| /// assert_eq!(leap - Duration::zero(), from_hmsm(3, 5, 59, 1_300)); |
| /// assert_eq!(leap - Duration::milliseconds(200), from_hmsm(3, 5, 59, 1_100)); |
| /// assert_eq!(leap - Duration::milliseconds(500), from_hmsm(3, 5, 59, 800)); |
| /// assert_eq!(leap - Duration::seconds(60), from_hmsm(3, 5, 0, 300)); |
| /// assert_eq!(leap - Duration::days(1), from_hmsm(3, 6, 0, 300)); |
| /// ``` |
| /// |
| /// [leap second handling]: crate::NaiveTime#leap-second-handling |
| </span><span class="kw">impl </span>Sub<OldDuration> <span class="kw">for </span>NaiveTime { |
| <span class="kw">type </span>Output = NaiveTime; |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>sub(<span class="self">self</span>, rhs: OldDuration) -> NaiveTime { |
| <span class="self">self</span>.overflowing_sub_signed(rhs).<span class="number">0 |
| </span>} |
| } |
| |
| <span class="kw">impl </span>SubAssign<OldDuration> <span class="kw">for </span>NaiveTime { |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>sub_assign(<span class="kw-2">&mut </span><span class="self">self</span>, rhs: OldDuration) { |
| <span class="kw-2">*</span><span class="self">self </span>= <span class="self">self</span>.sub(rhs); |
| } |
| } |
| |
| <span class="doccomment">/// Subtracts another `NaiveTime` from the current time. |
| /// Returns a `Duration` within +/- 1 day. |
| /// This does not overflow or underflow at all. |
| /// |
| /// As a part of Chrono's [leap second handling](#leap-second-handling), |
| /// the subtraction assumes that **there is no leap second ever**, |
| /// except when any of the `NaiveTime`s themselves represents a leap second |
| /// in which case the assumption becomes that |
| /// **there are exactly one (or two) leap second(s) ever**. |
| /// |
| /// The implementation is a wrapper around |
| /// [`NaiveTime::signed_duration_since`](#method.signed_duration_since). |
| /// |
| /// # Example |
| /// |
| /// ``` |
| /// use chrono::{Duration, NaiveTime}; |
| /// |
| /// let from_hmsm = |h, m, s, milli| { NaiveTime::from_hms_milli_opt(h, m, s, milli).unwrap() }; |
| /// |
| /// assert_eq!(from_hmsm(3, 5, 7, 900) - from_hmsm(3, 5, 7, 900), Duration::zero()); |
| /// assert_eq!(from_hmsm(3, 5, 7, 900) - from_hmsm(3, 5, 7, 875), Duration::milliseconds(25)); |
| /// assert_eq!(from_hmsm(3, 5, 7, 900) - from_hmsm(3, 5, 6, 925), Duration::milliseconds(975)); |
| /// assert_eq!(from_hmsm(3, 5, 7, 900) - from_hmsm(3, 5, 0, 900), Duration::seconds(7)); |
| /// assert_eq!(from_hmsm(3, 5, 7, 900) - from_hmsm(3, 0, 7, 900), Duration::seconds(5 * 60)); |
| /// assert_eq!(from_hmsm(3, 5, 7, 900) - from_hmsm(0, 5, 7, 900), Duration::seconds(3 * 3600)); |
| /// assert_eq!(from_hmsm(3, 5, 7, 900) - from_hmsm(4, 5, 7, 900), Duration::seconds(-3600)); |
| /// assert_eq!(from_hmsm(3, 5, 7, 900) - from_hmsm(2, 4, 6, 800), |
| /// Duration::seconds(3600 + 60 + 1) + Duration::milliseconds(100)); |
| /// ``` |
| /// |
| /// Leap seconds are handled, but the subtraction assumes that |
| /// there were no other leap seconds happened. |
| /// |
| /// ``` |
| /// # use chrono::{Duration, NaiveTime}; |
| /// # let from_hmsm = |h, m, s, milli| { NaiveTime::from_hms_milli_opt(h, m, s, milli).unwrap() }; |
| /// assert_eq!(from_hmsm(3, 0, 59, 1_000) - from_hmsm(3, 0, 59, 0), Duration::seconds(1)); |
| /// assert_eq!(from_hmsm(3, 0, 59, 1_500) - from_hmsm(3, 0, 59, 0), |
| /// Duration::milliseconds(1500)); |
| /// assert_eq!(from_hmsm(3, 0, 59, 1_000) - from_hmsm(3, 0, 0, 0), Duration::seconds(60)); |
| /// assert_eq!(from_hmsm(3, 0, 0, 0) - from_hmsm(2, 59, 59, 1_000), Duration::seconds(1)); |
| /// assert_eq!(from_hmsm(3, 0, 59, 1_000) - from_hmsm(2, 59, 59, 1_000), |
| /// Duration::seconds(61)); |
| /// ``` |
| </span><span class="kw">impl </span>Sub<NaiveTime> <span class="kw">for </span>NaiveTime { |
| <span class="kw">type </span>Output = OldDuration; |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>sub(<span class="self">self</span>, rhs: NaiveTime) -> OldDuration { |
| <span class="self">self</span>.signed_duration_since(rhs) |
| } |
| } |
| |
| <span class="doccomment">/// The `Debug` output of the naive time `t` is the same as |
| /// [`t.format("%H:%M:%S%.f")`](../format/strftime/index.html). |
| /// |
| /// The string printed can be readily parsed via the `parse` method on `str`. |
| /// |
| /// It should be noted that, for leap seconds not on the minute boundary, |
| /// it may print a representation not distinguishable from non-leap seconds. |
| /// This doesn't matter in practice, since such leap seconds never happened. |
| /// (By the time of the first leap second on 1972-06-30, |
| /// every time zone offset around the world has standardized to the 5-minute alignment.) |
| /// |
| /// # Example |
| /// |
| /// ``` |
| /// use chrono::NaiveTime; |
| /// |
| /// assert_eq!(format!("{:?}", NaiveTime::from_hms_opt(23, 56, 4).unwrap()), "23:56:04"); |
| /// assert_eq!(format!("{:?}", NaiveTime::from_hms_milli_opt(23, 56, 4, 12).unwrap()), "23:56:04.012"); |
| /// assert_eq!(format!("{:?}", NaiveTime::from_hms_micro_opt(23, 56, 4, 1234).unwrap()), "23:56:04.001234"); |
| /// assert_eq!(format!("{:?}", NaiveTime::from_hms_nano_opt(23, 56, 4, 123456).unwrap()), "23:56:04.000123456"); |
| /// ``` |
| /// |
| /// Leap seconds may also be used. |
| /// |
| /// ``` |
| /// # use chrono::NaiveTime; |
| /// assert_eq!(format!("{:?}", NaiveTime::from_hms_milli_opt(6, 59, 59, 1_500).unwrap()), "06:59:60.500"); |
| /// ``` |
| </span><span class="kw">impl </span>fmt::Debug <span class="kw">for </span>NaiveTime { |
| <span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>fmt::Formatter) -> fmt::Result { |
| <span class="kw">let </span>(hour, min, sec) = <span class="self">self</span>.hms(); |
| <span class="kw">let </span>(sec, nano) = <span class="kw">if </span><span class="self">self</span>.frac >= <span class="number">1_000_000_000 </span>{ |
| (sec + <span class="number">1</span>, <span class="self">self</span>.frac - <span class="number">1_000_000_000</span>) |
| } <span class="kw">else </span>{ |
| (sec, <span class="self">self</span>.frac) |
| }; |
| |
| <span class="kw">use </span>core::fmt::Write; |
| write_hundreds(f, hour <span class="kw">as </span>u8)<span class="question-mark">?</span>; |
| f.write_char(<span class="string">':'</span>)<span class="question-mark">?</span>; |
| write_hundreds(f, min <span class="kw">as </span>u8)<span class="question-mark">?</span>; |
| f.write_char(<span class="string">':'</span>)<span class="question-mark">?</span>; |
| write_hundreds(f, sec <span class="kw">as </span>u8)<span class="question-mark">?</span>; |
| |
| <span class="kw">if </span>nano == <span class="number">0 </span>{ |
| <span class="prelude-val">Ok</span>(()) |
| } <span class="kw">else if </span>nano % <span class="number">1_000_000 </span>== <span class="number">0 </span>{ |
| <span class="macro">write!</span>(f, <span class="string">".{:03}"</span>, nano / <span class="number">1_000_000</span>) |
| } <span class="kw">else if </span>nano % <span class="number">1_000 </span>== <span class="number">0 </span>{ |
| <span class="macro">write!</span>(f, <span class="string">".{:06}"</span>, nano / <span class="number">1_000</span>) |
| } <span class="kw">else </span>{ |
| <span class="macro">write!</span>(f, <span class="string">".{:09}"</span>, nano) |
| } |
| } |
| } |
| |
| <span class="doccomment">/// The `Display` output of the naive time `t` is the same as |
| /// [`t.format("%H:%M:%S%.f")`](../format/strftime/index.html). |
| /// |
| /// The string printed can be readily parsed via the `parse` method on `str`. |
| /// |
| /// It should be noted that, for leap seconds not on the minute boundary, |
| /// it may print a representation not distinguishable from non-leap seconds. |
| /// This doesn't matter in practice, since such leap seconds never happened. |
| /// (By the time of the first leap second on 1972-06-30, |
| /// every time zone offset around the world has standardized to the 5-minute alignment.) |
| /// |
| /// # Example |
| /// |
| /// ``` |
| /// use chrono::NaiveTime; |
| /// |
| /// assert_eq!(format!("{}", NaiveTime::from_hms_opt(23, 56, 4).unwrap()), "23:56:04"); |
| /// assert_eq!(format!("{}", NaiveTime::from_hms_milli_opt(23, 56, 4, 12).unwrap()), "23:56:04.012"); |
| /// assert_eq!(format!("{}", NaiveTime::from_hms_micro_opt(23, 56, 4, 1234).unwrap()), "23:56:04.001234"); |
| /// assert_eq!(format!("{}", NaiveTime::from_hms_nano_opt(23, 56, 4, 123456).unwrap()), "23:56:04.000123456"); |
| /// ``` |
| /// |
| /// Leap seconds may also be used. |
| /// |
| /// ``` |
| /// # use chrono::NaiveTime; |
| /// assert_eq!(format!("{}", NaiveTime::from_hms_milli_opt(6, 59, 59, 1_500).unwrap()), "06:59:60.500"); |
| /// ``` |
| </span><span class="kw">impl </span>fmt::Display <span class="kw">for </span>NaiveTime { |
| <span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>fmt::Formatter) -> fmt::Result { |
| fmt::Debug::fmt(<span class="self">self</span>, f) |
| } |
| } |
| |
| <span class="doccomment">/// Parsing a `str` into a `NaiveTime` uses the same format, |
| /// [`%H:%M:%S%.f`](../format/strftime/index.html), as in `Debug` and `Display`. |
| /// |
| /// # Example |
| /// |
| /// ``` |
| /// use chrono::NaiveTime; |
| /// |
| /// let t = NaiveTime::from_hms_opt(23, 56, 4).unwrap(); |
| /// assert_eq!("23:56:04".parse::<NaiveTime>(), Ok(t)); |
| /// |
| /// let t = NaiveTime::from_hms_nano_opt(23, 56, 4, 12_345_678).unwrap(); |
| /// assert_eq!("23:56:4.012345678".parse::<NaiveTime>(), Ok(t)); |
| /// |
| /// let t = NaiveTime::from_hms_nano_opt(23, 59, 59, 1_234_567_890).unwrap(); // leap second |
| /// assert_eq!("23:59:60.23456789".parse::<NaiveTime>(), Ok(t)); |
| /// |
| /// assert!("foo".parse::<NaiveTime>().is_err()); |
| /// ``` |
| </span><span class="kw">impl </span>str::FromStr <span class="kw">for </span>NaiveTime { |
| <span class="kw">type </span><span class="prelude-val">Err </span>= ParseError; |
| |
| <span class="kw">fn </span>from_str(s: <span class="kw-2">&</span>str) -> ParseResult<NaiveTime> { |
| <span class="kw">const </span>ITEMS: <span class="kw-2">&</span>[Item<<span class="lifetime">'static</span>>] = <span class="kw-2">&</span>[ |
| Item::Numeric(Numeric::Hour, Pad::Zero), |
| Item::Space(<span class="string">""</span>), |
| Item::Literal(<span class="string">":"</span>), |
| Item::Numeric(Numeric::Minute, Pad::Zero), |
| Item::Space(<span class="string">""</span>), |
| Item::Literal(<span class="string">":"</span>), |
| Item::Numeric(Numeric::Second, Pad::Zero), |
| Item::Fixed(Fixed::Nanosecond), |
| Item::Space(<span class="string">""</span>), |
| ]; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>parsed = Parsed::new(); |
| parse(<span class="kw-2">&mut </span>parsed, s, ITEMS.iter())<span class="question-mark">?</span>; |
| parsed.to_naive_time() |
| } |
| } |
| |
| <span class="doccomment">/// The default value for a NaiveTime is midnight, 00:00:00 exactly. |
| /// |
| /// # Example |
| /// |
| /// ```rust |
| /// use chrono::NaiveTime; |
| /// |
| /// let default_time = NaiveTime::default(); |
| /// assert_eq!(default_time, NaiveTime::from_hms_opt(0, 0, 0).unwrap()); |
| /// ``` |
| </span><span class="kw">impl </span>Default <span class="kw">for </span>NaiveTime { |
| <span class="kw">fn </span>default() -> <span class="self">Self </span>{ |
| NaiveTime::from_hms_opt(<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>).unwrap() |
| } |
| } |
| |
| <span class="attribute">#[cfg(all(test, any(feature = <span class="string">"rustc-serialize"</span>, feature = <span class="string">"serde"</span>)))] |
| </span><span class="kw">fn </span>test_encodable_json<F, E>(to_string: F) |
| <span class="kw">where |
| </span>F: Fn(<span class="kw-2">&</span>NaiveTime) -> <span class="prelude-ty">Result</span><String, E>, |
| E: ::std::fmt::Debug, |
| { |
| <span class="macro">assert_eq!</span>( |
| to_string(<span class="kw-2">&</span>NaiveTime::from_hms_opt(<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>).unwrap()).ok(), |
| <span class="prelude-val">Some</span>(<span class="string">r#""00:00:00""#</span>.into()) |
| ); |
| <span class="macro">assert_eq!</span>( |
| to_string(<span class="kw-2">&</span>NaiveTime::from_hms_milli_opt(<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">950</span>).unwrap()).ok(), |
| <span class="prelude-val">Some</span>(<span class="string">r#""00:00:00.950""#</span>.into()) |
| ); |
| <span class="macro">assert_eq!</span>( |
| to_string(<span class="kw-2">&</span>NaiveTime::from_hms_milli_opt(<span class="number">0</span>, <span class="number">0</span>, <span class="number">59</span>, <span class="number">1_000</span>).unwrap()).ok(), |
| <span class="prelude-val">Some</span>(<span class="string">r#""00:00:60""#</span>.into()) |
| ); |
| <span class="macro">assert_eq!</span>( |
| to_string(<span class="kw-2">&</span>NaiveTime::from_hms_opt(<span class="number">0</span>, <span class="number">1</span>, <span class="number">2</span>).unwrap()).ok(), |
| <span class="prelude-val">Some</span>(<span class="string">r#""00:01:02""#</span>.into()) |
| ); |
| <span class="macro">assert_eq!</span>( |
| to_string(<span class="kw-2">&</span>NaiveTime::from_hms_nano_opt(<span class="number">3</span>, <span class="number">5</span>, <span class="number">7</span>, <span class="number">98765432</span>).unwrap()).ok(), |
| <span class="prelude-val">Some</span>(<span class="string">r#""03:05:07.098765432""#</span>.into()) |
| ); |
| <span class="macro">assert_eq!</span>( |
| to_string(<span class="kw-2">&</span>NaiveTime::from_hms_opt(<span class="number">7</span>, <span class="number">8</span>, <span class="number">9</span>).unwrap()).ok(), |
| <span class="prelude-val">Some</span>(<span class="string">r#""07:08:09""#</span>.into()) |
| ); |
| <span class="macro">assert_eq!</span>( |
| to_string(<span class="kw-2">&</span>NaiveTime::from_hms_micro_opt(<span class="number">12</span>, <span class="number">34</span>, <span class="number">56</span>, <span class="number">789</span>).unwrap()).ok(), |
| <span class="prelude-val">Some</span>(<span class="string">r#""12:34:56.000789""#</span>.into()) |
| ); |
| <span class="macro">assert_eq!</span>( |
| to_string(<span class="kw-2">&</span>NaiveTime::from_hms_nano_opt(<span class="number">23</span>, <span class="number">59</span>, <span class="number">59</span>, <span class="number">1_999_999_999</span>).unwrap()).ok(), |
| <span class="prelude-val">Some</span>(<span class="string">r#""23:59:60.999999999""#</span>.into()) |
| ); |
| } |
| |
| <span class="attribute">#[cfg(all(test, any(feature = <span class="string">"rustc-serialize"</span>, feature = <span class="string">"serde"</span>)))] |
| </span><span class="kw">fn </span>test_decodable_json<F, E>(from_str: F) |
| <span class="kw">where |
| </span>F: Fn(<span class="kw-2">&</span>str) -> <span class="prelude-ty">Result</span><NaiveTime, E>, |
| E: ::std::fmt::Debug, |
| { |
| <span class="macro">assert_eq!</span>(from_str(<span class="string">r#""00:00:00""#</span>).ok(), <span class="prelude-val">Some</span>(NaiveTime::from_hms_opt(<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>).unwrap())); |
| <span class="macro">assert_eq!</span>(from_str(<span class="string">r#""0:0:0""#</span>).ok(), <span class="prelude-val">Some</span>(NaiveTime::from_hms_opt(<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>).unwrap())); |
| <span class="macro">assert_eq!</span>( |
| from_str(<span class="string">r#""00:00:00.950""#</span>).ok(), |
| <span class="prelude-val">Some</span>(NaiveTime::from_hms_milli_opt(<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">950</span>).unwrap()) |
| ); |
| <span class="macro">assert_eq!</span>( |
| from_str(<span class="string">r#""0:0:0.95""#</span>).ok(), |
| <span class="prelude-val">Some</span>(NaiveTime::from_hms_milli_opt(<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">950</span>).unwrap()) |
| ); |
| <span class="macro">assert_eq!</span>( |
| from_str(<span class="string">r#""00:00:60""#</span>).ok(), |
| <span class="prelude-val">Some</span>(NaiveTime::from_hms_milli_opt(<span class="number">0</span>, <span class="number">0</span>, <span class="number">59</span>, <span class="number">1_000</span>).unwrap()) |
| ); |
| <span class="macro">assert_eq!</span>(from_str(<span class="string">r#""00:01:02""#</span>).ok(), <span class="prelude-val">Some</span>(NaiveTime::from_hms_opt(<span class="number">0</span>, <span class="number">1</span>, <span class="number">2</span>).unwrap())); |
| <span class="macro">assert_eq!</span>( |
| from_str(<span class="string">r#""03:05:07.098765432""#</span>).ok(), |
| <span class="prelude-val">Some</span>(NaiveTime::from_hms_nano_opt(<span class="number">3</span>, <span class="number">5</span>, <span class="number">7</span>, <span class="number">98765432</span>).unwrap()) |
| ); |
| <span class="macro">assert_eq!</span>(from_str(<span class="string">r#""07:08:09""#</span>).ok(), <span class="prelude-val">Some</span>(NaiveTime::from_hms_opt(<span class="number">7</span>, <span class="number">8</span>, <span class="number">9</span>).unwrap())); |
| <span class="macro">assert_eq!</span>( |
| from_str(<span class="string">r#""12:34:56.000789""#</span>).ok(), |
| <span class="prelude-val">Some</span>(NaiveTime::from_hms_micro_opt(<span class="number">12</span>, <span class="number">34</span>, <span class="number">56</span>, <span class="number">789</span>).unwrap()) |
| ); |
| <span class="macro">assert_eq!</span>( |
| from_str(<span class="string">r#""23:59:60.999999999""#</span>).ok(), |
| <span class="prelude-val">Some</span>(NaiveTime::from_hms_nano_opt(<span class="number">23</span>, <span class="number">59</span>, <span class="number">59</span>, <span class="number">1_999_999_999</span>).unwrap()) |
| ); |
| <span class="macro">assert_eq!</span>( |
| from_str(<span class="string">r#""23:59:60.9999999999997""#</span>).ok(), <span class="comment">// excess digits are ignored |
| </span><span class="prelude-val">Some</span>(NaiveTime::from_hms_nano_opt(<span class="number">23</span>, <span class="number">59</span>, <span class="number">59</span>, <span class="number">1_999_999_999</span>).unwrap()) |
| ); |
| |
| <span class="comment">// bad formats |
| </span><span class="macro">assert!</span>(from_str(<span class="string">r#""""#</span>).is_err()); |
| <span class="macro">assert!</span>(from_str(<span class="string">r#""000000""#</span>).is_err()); |
| <span class="macro">assert!</span>(from_str(<span class="string">r#""00:00:61""#</span>).is_err()); |
| <span class="macro">assert!</span>(from_str(<span class="string">r#""00:60:00""#</span>).is_err()); |
| <span class="macro">assert!</span>(from_str(<span class="string">r#""24:00:00""#</span>).is_err()); |
| <span class="macro">assert!</span>(from_str(<span class="string">r#""23:59:59,1""#</span>).is_err()); |
| <span class="macro">assert!</span>(from_str(<span class="string">r#""012:34:56""#</span>).is_err()); |
| <span class="macro">assert!</span>(from_str(<span class="string">r#""hh:mm:ss""#</span>).is_err()); |
| <span class="macro">assert!</span>(from_str(<span class="string">r#"0"#</span>).is_err()); |
| <span class="macro">assert!</span>(from_str(<span class="string">r#"86399"#</span>).is_err()); |
| <span class="macro">assert!</span>(from_str(<span class="string">r#"{}"#</span>).is_err()); |
| <span class="comment">// pre-0.3.0 rustc-serialize format is now invalid |
| </span><span class="macro">assert!</span>(from_str(<span class="string">r#"{"secs":0,"frac":0}"#</span>).is_err()); |
| <span class="macro">assert!</span>(from_str(<span class="string">r#"null"#</span>).is_err()); |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../../../" data-current-crate="chrono" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |