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href='../../core/index.html'><img src='https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png' alt='logo' width='100'></a> </nav> <div class="theme-picker"> <button id="theme-picker" aria-label="Pick another theme!"> <img src="../../brush.svg" width="18" alt="Pick another theme!"> </button> <div id="theme-choices"></div> </div> <script src="../../theme.js"></script> <nav class="sub"> <form class="search-form js-only"> <div class="search-container"> <input class="search-input" name="search" autocomplete="off" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"> </div> </form> </nav> <section id='main' class="content"><pre class="line-numbers"><span id="1"> 1</span> <span id="2"> 2</span> <span id="3"> 3</span> <span id="4"> 4</span> <span id="5"> 5</span> <span id="6"> 6</span> <span id="7"> 7</span> <span id="8"> 8</span> <span id="9"> 9</span> <span id="10"> 10</span> <span id="11"> 11</span> <span id="12"> 12</span> <span id="13"> 13</span> <span 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id="588">588</span> <span id="589">589</span> <span id="590">590</span> <span id="591">591</span> <span id="592">592</span> <span id="593">593</span> <span id="594">594</span> <span id="595">595</span> <span id="596">596</span> <span id="597">597</span> <span id="598">598</span> <span id="599">599</span> <span id="600">600</span> <span id="601">601</span> <span id="602">602</span> <span id="603">603</span> </pre><pre class="rust "> <span class="comment">// Copyright 2012-2017 The Rust Project Developers. See the COPYRIGHT</span> <span class="comment">// file at the top-level directory of this distribution and at</span> <span class="comment">// http://rust-lang.org/COPYRIGHT.</span> <span class="comment">//</span> <span class="comment">// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or</span> <span class="comment">// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license</span> <span class="comment">// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your</span> <span class="comment">// option. This file may not be copied, modified, or distributed</span> <span class="comment">// except according to those terms.</span> <span class="attribute">#![<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"duration_core"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.24.0"</span>)]</span> <span class="doccomment">//! Temporal quantification.</span> <span class="doccomment">//!</span> <span class="doccomment">//! Example:</span> <span class="doccomment">//!</span> <span class="doccomment">//! ```</span> <span class="doccomment">//! use std::time::Duration;</span> <span class="doccomment">//!</span> <span class="doccomment">//! let five_seconds = Duration::new(5, 0);</span> <span class="doccomment">//! // both declarations are equivalent</span> <span class="doccomment">//! assert_eq!(Duration::new(5, 0), Duration::from_secs(5));</span> <span class="doccomment">//! ```</span> <span class="kw">use</span> <span class="ident">iter</span>::<span class="ident">Sum</span>; <span class="kw">use</span> <span class="ident">ops</span>::{<span class="ident">Add</span>, <span class="ident">Sub</span>, <span class="ident">Mul</span>, <span class="ident">Div</span>, <span class="ident">AddAssign</span>, <span class="ident">SubAssign</span>, <span class="ident">MulAssign</span>, <span class="ident">DivAssign</span>}; <span class="kw">const</span> <span class="ident">NANOS_PER_SEC</span>: <span class="ident">u32</span> <span class="op">=</span> <span class="number">1_000_000_000</span>; <span class="kw">const</span> <span class="ident">NANOS_PER_MILLI</span>: <span class="ident">u32</span> <span class="op">=</span> <span class="number">1_000_000</span>; <span class="kw">const</span> <span class="ident">NANOS_PER_MICRO</span>: <span class="ident">u32</span> <span class="op">=</span> <span class="number">1_000</span>; <span class="kw">const</span> <span class="ident">MILLIS_PER_SEC</span>: <span class="ident">u64</span> <span class="op">=</span> <span class="number">1_000</span>; <span class="kw">const</span> <span class="ident">MICROS_PER_SEC</span>: <span class="ident">u64</span> <span class="op">=</span> <span class="number">1_000_000</span>; <span class="doccomment">/// A `Duration` type to represent a span of time, typically used for system</span> <span class="doccomment">/// timeouts.</span> <span class="doccomment">///</span> <span class="doccomment">/// Each `Duration` is composed of a whole number of seconds and a fractional part</span> <span class="doccomment">/// represented in nanoseconds. If the underlying system does not support</span> <span class="doccomment">/// nanosecond-level precision, APIs binding a system timeout will typically round up</span> <span class="doccomment">/// the number of nanoseconds.</span> <span class="doccomment">///</span> <span class="doccomment">/// `Duration`s implement many common traits, including [`Add`], [`Sub`], and other</span> <span class="doccomment">/// [`ops`] traits.</span> <span class="doccomment">///</span> <span class="doccomment">/// [`Add`]: ../../std/ops/trait.Add.html</span> <span class="doccomment">/// [`Sub`]: ../../std/ops/trait.Sub.html</span> <span class="doccomment">/// [`ops`]: ../../std/ops/index.html</span> <span class="doccomment">///</span> <span class="doccomment">/// # Examples</span> <span class="doccomment">///</span> <span class="doccomment">/// ```</span> <span class="doccomment">/// use std::time::Duration;</span> <span class="doccomment">///</span> <span class="doccomment">/// let five_seconds = Duration::new(5, 0);</span> <span class="doccomment">/// let five_seconds_and_five_nanos = five_seconds + Duration::new(0, 5);</span> <span class="doccomment">///</span> <span class="doccomment">/// assert_eq!(five_seconds_and_five_nanos.as_secs(), 5);</span> <span class="doccomment">/// assert_eq!(five_seconds_and_five_nanos.subsec_nanos(), 5);</span> <span class="doccomment">///</span> <span class="doccomment">/// let ten_millis = Duration::from_millis(10);</span> <span class="doccomment">/// ```</span> <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"duration_core"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.24.0"</span>)]</span> <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">Copy</span>, <span class="ident">PartialEq</span>, <span class="ident">Eq</span>, <span class="ident">PartialOrd</span>, <span class="ident">Ord</span>, <span class="ident">Debug</span>, <span class="ident">Hash</span>, <span class="ident">Default</span>)]</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Duration</span> { <span class="ident">secs</span>: <span class="ident">u64</span>, <span class="ident">nanos</span>: <span class="ident">u32</span>, <span class="comment">// Always 0 <= nanos < NANOS_PER_SEC</span> } <span class="kw">impl</span> <span class="ident">Duration</span> { <span class="doccomment">/// Creates a new `Duration` from the specified number of whole seconds and</span> <span class="doccomment">/// additional nanoseconds.</span> <span class="doccomment">///</span> <span class="doccomment">/// If the number of nanoseconds is greater than 1 billion (the number of</span> <span class="doccomment">/// nanoseconds in a second), then it will carry over into the seconds provided.</span> <span class="doccomment">///</span> <span class="doccomment">/// # Panics</span> <span class="doccomment">///</span> <span class="doccomment">/// This constructor will panic if the carry from the nanoseconds overflows</span> <span class="doccomment">/// the seconds counter.</span> <span class="doccomment">///</span> <span class="doccomment">/// # Examples</span> <span class="doccomment">///</span> <span class="doccomment">/// ```</span> <span class="doccomment">/// use std::time::Duration;</span> <span class="doccomment">///</span> <span class="doccomment">/// let five_seconds = Duration::new(5, 0);</span> <span class="doccomment">/// ```</span> <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"duration"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.3.0"</span>)]</span> <span class="attribute">#[<span class="ident">inline</span>]</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span>(<span class="ident">secs</span>: <span class="ident">u64</span>, <span class="ident">nanos</span>: <span class="ident">u32</span>) <span class="op">-></span> <span class="ident">Duration</span> { <span class="kw">let</span> <span class="ident">secs</span> <span class="op">=</span> <span class="ident">secs</span>.<span class="ident">checked_add</span>((<span class="ident">nanos</span> <span class="op">/</span> <span class="ident">NANOS_PER_SEC</span>) <span class="kw">as</span> <span class="ident">u64</span>) .<span class="ident">expect</span>(<span class="string">"overflow in Duration::new"</span>); <span class="kw">let</span> <span class="ident">nanos</span> <span class="op">=</span> <span class="ident">nanos</span> <span class="op">%</span> <span class="ident">NANOS_PER_SEC</span>; <span class="ident">Duration</span> { <span class="ident">secs</span>: <span class="ident">secs</span>, <span class="ident">nanos</span>: <span class="ident">nanos</span> } } <span class="doccomment">/// Creates a new `Duration` from the specified number of whole seconds.</span> <span class="doccomment">///</span> <span class="doccomment">/// # Examples</span> <span class="doccomment">///</span> <span class="doccomment">/// ```</span> <span class="doccomment">/// use std::time::Duration;</span> <span class="doccomment">///</span> <span class="doccomment">/// let duration = Duration::from_secs(5);</span> <span class="doccomment">///</span> <span class="doccomment">/// assert_eq!(5, duration.as_secs());</span> <span class="doccomment">/// assert_eq!(0, duration.subsec_nanos());</span> <span class="doccomment">/// ```</span> <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"duration"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.3.0"</span>)]</span> <span class="attribute">#[<span class="ident">inline</span>]</span> <span class="kw">pub</span> <span class="kw">const</span> <span class="kw">fn</span> <span class="ident">from_secs</span>(<span class="ident">secs</span>: <span class="ident">u64</span>) <span class="op">-></span> <span class="ident">Duration</span> { <span class="ident">Duration</span> { <span class="ident">secs</span>: <span class="ident">secs</span>, <span class="ident">nanos</span>: <span class="number">0</span> } } <span class="doccomment">/// Creates a new `Duration` from the specified number of milliseconds.</span> <span class="doccomment">///</span> <span class="doccomment">/// # Examples</span> <span class="doccomment">///</span> <span class="doccomment">/// ```</span> <span class="doccomment">/// use std::time::Duration;</span> <span class="doccomment">///</span> <span class="doccomment">/// let duration = Duration::from_millis(2569);</span> <span class="doccomment">///</span> <span class="doccomment">/// assert_eq!(2, duration.as_secs());</span> <span class="doccomment">/// assert_eq!(569_000_000, duration.subsec_nanos());</span> <span class="doccomment">/// ```</span> <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"duration"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.3.0"</span>)]</span> <span class="attribute">#[<span class="ident">inline</span>]</span> <span class="kw">pub</span> <span class="kw">const</span> <span class="kw">fn</span> <span class="ident">from_millis</span>(<span class="ident">millis</span>: <span class="ident">u64</span>) <span class="op">-></span> <span class="ident">Duration</span> { <span class="ident">Duration</span> { <span class="ident">secs</span>: <span class="ident">millis</span> <span class="op">/</span> <span class="ident">MILLIS_PER_SEC</span>, <span class="ident">nanos</span>: ((<span class="ident">millis</span> <span class="op">%</span> <span class="ident">MILLIS_PER_SEC</span>) <span class="kw">as</span> <span class="ident">u32</span>) <span class="op">*</span> <span class="ident">NANOS_PER_MILLI</span>, } } <span class="doccomment">/// Creates a new `Duration` from the specified number of microseconds.</span> <span class="doccomment">///</span> <span class="doccomment">/// # Examples</span> <span class="doccomment">///</span> <span class="doccomment">/// ```</span> <span class="doccomment">/// #![feature(duration_from_micros)]</span> <span class="doccomment">/// use std::time::Duration;</span> <span class="doccomment">///</span> <span class="doccomment">/// let duration = Duration::from_micros(1_000_002);</span> <span class="doccomment">///</span> <span class="doccomment">/// assert_eq!(1, duration.as_secs());</span> <span class="doccomment">/// assert_eq!(2000, duration.subsec_nanos());</span> <span class="doccomment">/// ```</span> <span class="attribute">#[<span class="ident">unstable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"duration_from_micros"</span>, <span class="ident">issue</span> <span class="op">=</span> <span class="string">"44400"</span>)]</span> <span class="attribute">#[<span class="ident">inline</span>]</span> <span class="kw">pub</span> <span class="kw">const</span> <span class="kw">fn</span> <span class="ident">from_micros</span>(<span class="ident">micros</span>: <span class="ident">u64</span>) <span class="op">-></span> <span class="ident">Duration</span> { <span class="ident">Duration</span> { <span class="ident">secs</span>: <span class="ident">micros</span> <span class="op">/</span> <span class="ident">MICROS_PER_SEC</span>, <span class="ident">nanos</span>: ((<span class="ident">micros</span> <span class="op">%</span> <span class="ident">MICROS_PER_SEC</span>) <span class="kw">as</span> <span class="ident">u32</span>) <span class="op">*</span> <span class="ident">NANOS_PER_MICRO</span>, } } <span class="doccomment">/// Creates a new `Duration` from the specified number of nanoseconds.</span> <span class="doccomment">///</span> <span class="doccomment">/// # Examples</span> <span class="doccomment">///</span> <span class="doccomment">/// ```</span> <span class="doccomment">/// #![feature(duration_extras)]</span> <span class="doccomment">/// use std::time::Duration;</span> <span class="doccomment">///</span> <span class="doccomment">/// let duration = Duration::from_nanos(1_000_000_123);</span> <span class="doccomment">///</span> <span class="doccomment">/// assert_eq!(1, duration.as_secs());</span> <span class="doccomment">/// assert_eq!(123, duration.subsec_nanos());</span> <span class="doccomment">/// ```</span> <span class="attribute">#[<span class="ident">unstable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"duration_extras"</span>, <span class="ident">issue</span> <span class="op">=</span> <span class="string">"46507"</span>)]</span> <span class="attribute">#[<span class="ident">inline</span>]</span> <span class="kw">pub</span> <span class="kw">const</span> <span class="kw">fn</span> <span class="ident">from_nanos</span>(<span class="ident">nanos</span>: <span class="ident">u64</span>) <span class="op">-></span> <span class="ident">Duration</span> { <span class="ident">Duration</span> { <span class="ident">secs</span>: <span class="ident">nanos</span> <span class="op">/</span> (<span class="ident">NANOS_PER_SEC</span> <span class="kw">as</span> <span class="ident">u64</span>), <span class="ident">nanos</span>: (<span class="ident">nanos</span> <span class="op">%</span> (<span class="ident">NANOS_PER_SEC</span> <span class="kw">as</span> <span class="ident">u64</span>)) <span class="kw">as</span> <span class="ident">u32</span>, } } <span class="doccomment">/// Returns the number of _whole_ seconds contained by this `Duration`.</span> <span class="doccomment">///</span> <span class="doccomment">/// The returned value does not include the fractional (nanosecond) part of the</span> <span class="doccomment">/// duration, which can be obtained using [`subsec_nanos`].</span> <span class="doccomment">///</span> <span class="doccomment">/// # Examples</span> <span class="doccomment">///</span> <span class="doccomment">/// ```</span> <span class="doccomment">/// use std::time::Duration;</span> <span class="doccomment">///</span> <span class="doccomment">/// let duration = Duration::new(5, 730023852);</span> <span class="doccomment">/// assert_eq!(duration.as_secs(), 5);</span> <span class="doccomment">/// ```</span> <span class="doccomment">///</span> <span class="doccomment">/// To determine the total number of seconds represented by the `Duration`,</span> <span class="doccomment">/// use `as_secs` in combination with [`subsec_nanos`]:</span> <span class="doccomment">///</span> <span class="doccomment">/// ```</span> <span class="doccomment">/// use std::time::Duration;</span> <span class="doccomment">///</span> <span class="doccomment">/// let duration = Duration::new(5, 730023852);</span> <span class="doccomment">///</span> <span class="doccomment">/// assert_eq!(5.730023852,</span> <span class="doccomment">/// duration.as_secs() as f64</span> <span class="doccomment">/// + duration.subsec_nanos() as f64 * 1e-9);</span> <span class="doccomment">/// ```</span> <span class="doccomment">///</span> <span class="doccomment">/// [`subsec_nanos`]: #method.subsec_nanos</span> <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"duration"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.3.0"</span>)]</span> <span class="attribute">#[<span class="ident">inline</span>]</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">as_secs</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">u64</span> { <span class="self">self</span>.<span class="ident">secs</span> } <span class="doccomment">/// Returns the fractional part of this `Duration`, in milliseconds.</span> <span class="doccomment">///</span> <span class="doccomment">/// This method does **not** return the length of the duration when</span> <span class="doccomment">/// represented by milliseconds. The returned number always represents a</span> <span class="doccomment">/// fractional portion of a second (i.e. it is less than one thousand).</span> <span class="doccomment">///</span> <span class="doccomment">/// # Examples</span> <span class="doccomment">///</span> <span class="doccomment">/// ```</span> <span class="doccomment">/// #![feature(duration_extras)]</span> <span class="doccomment">/// use std::time::Duration;</span> <span class="doccomment">///</span> <span class="doccomment">/// let duration = Duration::from_millis(5432);</span> <span class="doccomment">/// assert_eq!(duration.as_secs(), 5);</span> <span class="doccomment">/// assert_eq!(duration.subsec_millis(), 432);</span> <span class="doccomment">/// ```</span> <span class="attribute">#[<span class="ident">unstable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"duration_extras"</span>, <span class="ident">issue</span> <span class="op">=</span> <span class="string">"46507"</span>)]</span> <span class="attribute">#[<span class="ident">inline</span>]</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">subsec_millis</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">u32</span> { <span class="self">self</span>.<span class="ident">nanos</span> <span class="op">/</span> <span class="ident">NANOS_PER_MILLI</span> } <span class="doccomment">/// Returns the fractional part of this `Duration`, in microseconds.</span> <span class="doccomment">///</span> <span class="doccomment">/// This method does **not** return the length of the duration when</span> <span class="doccomment">/// represented by microseconds. The returned number always represents a</span> <span class="doccomment">/// fractional portion of a second (i.e. it is less than one million).</span> <span class="doccomment">///</span> <span class="doccomment">/// # Examples</span> <span class="doccomment">///</span> <span class="doccomment">/// ```</span> <span class="doccomment">/// #![feature(duration_extras, duration_from_micros)]</span> <span class="doccomment">/// use std::time::Duration;</span> <span class="doccomment">///</span> <span class="doccomment">/// let duration = Duration::from_micros(1_234_567);</span> <span class="doccomment">/// assert_eq!(duration.as_secs(), 1);</span> <span class="doccomment">/// assert_eq!(duration.subsec_micros(), 234_567);</span> <span class="doccomment">/// ```</span> <span class="attribute">#[<span class="ident">unstable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"duration_extras"</span>, <span class="ident">issue</span> <span class="op">=</span> <span class="string">"46507"</span>)]</span> <span class="attribute">#[<span class="ident">inline</span>]</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">subsec_micros</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">u32</span> { <span class="self">self</span>.<span class="ident">nanos</span> <span class="op">/</span> <span class="ident">NANOS_PER_MICRO</span> } <span class="doccomment">/// Returns the fractional part of this `Duration`, in nanoseconds.</span> <span class="doccomment">///</span> <span class="doccomment">/// This method does **not** return the length of the duration when</span> <span class="doccomment">/// represented by nanoseconds. The returned number always represents a</span> <span class="doccomment">/// fractional portion of a second (i.e. it is less than one billion).</span> <span class="doccomment">///</span> <span class="doccomment">/// # Examples</span> <span class="doccomment">///</span> <span class="doccomment">/// ```</span> <span class="doccomment">/// use std::time::Duration;</span> <span class="doccomment">///</span> <span class="doccomment">/// let duration = Duration::from_millis(5010);</span> <span class="doccomment">/// assert_eq!(duration.as_secs(), 5);</span> <span class="doccomment">/// assert_eq!(duration.subsec_nanos(), 10_000_000);</span> <span class="doccomment">/// ```</span> <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"duration"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.3.0"</span>)]</span> <span class="attribute">#[<span class="ident">inline</span>]</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">subsec_nanos</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">u32</span> { <span class="self">self</span>.<span class="ident">nanos</span> } <span class="doccomment">/// Checked `Duration` addition. Computes `self + other`, returning [`None`]</span> <span class="doccomment">/// if overflow occurred.</span> <span class="doccomment">///</span> <span class="doccomment">/// [`None`]: ../../std/option/enum.Option.html#variant.None</span> <span class="doccomment">///</span> <span class="doccomment">/// # Examples</span> <span class="doccomment">///</span> <span class="doccomment">/// Basic usage:</span> <span class="doccomment">///</span> <span class="doccomment">/// ```</span> <span class="doccomment">/// use std::time::Duration;</span> <span class="doccomment">///</span> <span class="doccomment">/// assert_eq!(Duration::new(0, 0).checked_add(Duration::new(0, 1)), Some(Duration::new(0, 1)));</span> <span class="doccomment">/// assert_eq!(Duration::new(1, 0).checked_add(Duration::new(std::u64::MAX, 0)), None);</span> <span class="doccomment">/// ```</span> <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"duration_checked_ops"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.16.0"</span>)]</span> <span class="attribute">#[<span class="ident">inline</span>]</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">checked_add</span>(<span class="self">self</span>, <span class="ident">rhs</span>: <span class="ident">Duration</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">Duration</span><span class="op">></span> { <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="kw-2">mut</span> <span class="ident">secs</span>) <span class="op">=</span> <span class="self">self</span>.<span class="ident">secs</span>.<span class="ident">checked_add</span>(<span class="ident">rhs</span>.<span class="ident">secs</span>) { <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">nanos</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">nanos</span> <span class="op">+</span> <span class="ident">rhs</span>.<span class="ident">nanos</span>; <span class="kw">if</span> <span class="ident">nanos</span> <span class="op">>=</span> <span class="ident">NANOS_PER_SEC</span> { <span class="ident">nanos</span> <span class="op">-=</span> <span class="ident">NANOS_PER_SEC</span>; <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">new_secs</span>) <span class="op">=</span> <span class="ident">secs</span>.<span class="ident">checked_add</span>(<span class="number">1</span>) { <span class="ident">secs</span> <span class="op">=</span> <span class="ident">new_secs</span>; } <span class="kw">else</span> { <span class="kw">return</span> <span class="prelude-val">None</span>; } } <span class="macro">debug_assert</span><span class="macro">!</span>(<span class="ident">nanos</span> <span class="op"><</span> <span class="ident">NANOS_PER_SEC</span>); <span class="prelude-val">Some</span>(<span class="ident">Duration</span> { <span class="ident">secs</span>, <span class="ident">nanos</span>, }) } <span class="kw">else</span> { <span class="prelude-val">None</span> } } <span class="doccomment">/// Checked `Duration` subtraction. Computes `self - other`, returning [`None`]</span> <span class="doccomment">/// if the result would be negative or if overflow occurred.</span> <span class="doccomment">///</span> <span class="doccomment">/// [`None`]: ../../std/option/enum.Option.html#variant.None</span> <span class="doccomment">///</span> <span class="doccomment">/// # Examples</span> <span class="doccomment">///</span> <span class="doccomment">/// Basic usage:</span> <span class="doccomment">///</span> <span class="doccomment">/// ```</span> <span class="doccomment">/// use std::time::Duration;</span> <span class="doccomment">///</span> <span class="doccomment">/// assert_eq!(Duration::new(0, 1).checked_sub(Duration::new(0, 0)), Some(Duration::new(0, 1)));</span> <span class="doccomment">/// assert_eq!(Duration::new(0, 0).checked_sub(Duration::new(0, 1)), None);</span> <span class="doccomment">/// ```</span> <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"duration_checked_ops"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.16.0"</span>)]</span> <span class="attribute">#[<span class="ident">inline</span>]</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">checked_sub</span>(<span class="self">self</span>, <span class="ident">rhs</span>: <span class="ident">Duration</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">Duration</span><span class="op">></span> { <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="kw-2">mut</span> <span class="ident">secs</span>) <span class="op">=</span> <span class="self">self</span>.<span class="ident">secs</span>.<span class="ident">checked_sub</span>(<span class="ident">rhs</span>.<span class="ident">secs</span>) { <span class="kw">let</span> <span class="ident">nanos</span> <span class="op">=</span> <span class="kw">if</span> <span class="self">self</span>.<span class="ident">nanos</span> <span class="op">>=</span> <span class="ident">rhs</span>.<span class="ident">nanos</span> { <span class="self">self</span>.<span class="ident">nanos</span> <span class="op">-</span> <span class="ident">rhs</span>.<span class="ident">nanos</span> } <span class="kw">else</span> { <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">sub_secs</span>) <span class="op">=</span> <span class="ident">secs</span>.<span class="ident">checked_sub</span>(<span class="number">1</span>) { <span class="ident">secs</span> <span class="op">=</span> <span class="ident">sub_secs</span>; <span class="self">self</span>.<span class="ident">nanos</span> <span class="op">+</span> <span class="ident">NANOS_PER_SEC</span> <span class="op">-</span> <span class="ident">rhs</span>.<span class="ident">nanos</span> } <span class="kw">else</span> { <span class="kw">return</span> <span class="prelude-val">None</span>; } }; <span class="macro">debug_assert</span><span class="macro">!</span>(<span class="ident">nanos</span> <span class="op"><</span> <span class="ident">NANOS_PER_SEC</span>); <span class="prelude-val">Some</span>(<span class="ident">Duration</span> { <span class="ident">secs</span>: <span class="ident">secs</span>, <span class="ident">nanos</span>: <span class="ident">nanos</span> }) } <span class="kw">else</span> { <span class="prelude-val">None</span> } } <span class="doccomment">/// Checked `Duration` multiplication. Computes `self * other`, returning</span> <span class="doccomment">/// [`None`] if overflow occurred.</span> <span class="doccomment">///</span> <span class="doccomment">/// [`None`]: ../../std/option/enum.Option.html#variant.None</span> <span class="doccomment">///</span> <span class="doccomment">/// # Examples</span> <span class="doccomment">///</span> <span class="doccomment">/// Basic usage:</span> <span class="doccomment">///</span> <span class="doccomment">/// ```</span> <span class="doccomment">/// use std::time::Duration;</span> <span class="doccomment">///</span> <span class="doccomment">/// assert_eq!(Duration::new(0, 500_000_001).checked_mul(2), Some(Duration::new(1, 2)));</span> <span class="doccomment">/// assert_eq!(Duration::new(std::u64::MAX - 1, 0).checked_mul(2), None);</span> <span class="doccomment">/// ```</span> <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"duration_checked_ops"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.16.0"</span>)]</span> <span class="attribute">#[<span class="ident">inline</span>]</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">checked_mul</span>(<span class="self">self</span>, <span class="ident">rhs</span>: <span class="ident">u32</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">Duration</span><span class="op">></span> { <span class="comment">// Multiply nanoseconds as u64, because it cannot overflow that way.</span> <span class="kw">let</span> <span class="ident">total_nanos</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">nanos</span> <span class="kw">as</span> <span class="ident">u64</span> <span class="op">*</span> <span class="ident">rhs</span> <span class="kw">as</span> <span class="ident">u64</span>; <span class="kw">let</span> <span class="ident">extra_secs</span> <span class="op">=</span> <span class="ident">total_nanos</span> <span class="op">/</span> (<span class="ident">NANOS_PER_SEC</span> <span class="kw">as</span> <span class="ident">u64</span>); <span class="kw">let</span> <span class="ident">nanos</span> <span class="op">=</span> (<span class="ident">total_nanos</span> <span class="op">%</span> (<span class="ident">NANOS_PER_SEC</span> <span class="kw">as</span> <span class="ident">u64</span>)) <span class="kw">as</span> <span class="ident">u32</span>; <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">secs</span>) <span class="op">=</span> <span class="self">self</span>.<span class="ident">secs</span> .<span class="ident">checked_mul</span>(<span class="ident">rhs</span> <span class="kw">as</span> <span class="ident">u64</span>) .<span class="ident">and_then</span>(<span class="op">|</span><span class="ident">s</span><span class="op">|</span> <span class="ident">s</span>.<span class="ident">checked_add</span>(<span class="ident">extra_secs</span>)) { <span class="macro">debug_assert</span><span class="macro">!</span>(<span class="ident">nanos</span> <span class="op"><</span> <span class="ident">NANOS_PER_SEC</span>); <span class="prelude-val">Some</span>(<span class="ident">Duration</span> { <span class="ident">secs</span>, <span class="ident">nanos</span>, }) } <span class="kw">else</span> { <span class="prelude-val">None</span> } } <span class="doccomment">/// Checked `Duration` division. Computes `self / other`, returning [`None`]</span> <span class="doccomment">/// if `other == 0`.</span> <span class="doccomment">///</span> <span class="doccomment">/// [`None`]: ../../std/option/enum.Option.html#variant.None</span> <span class="doccomment">///</span> <span class="doccomment">/// # Examples</span> <span class="doccomment">///</span> <span class="doccomment">/// Basic usage:</span> <span class="doccomment">///</span> <span class="doccomment">/// ```</span> <span class="doccomment">/// use std::time::Duration;</span> <span class="doccomment">///</span> <span class="doccomment">/// assert_eq!(Duration::new(2, 0).checked_div(2), Some(Duration::new(1, 0)));</span> <span class="doccomment">/// assert_eq!(Duration::new(1, 0).checked_div(2), Some(Duration::new(0, 500_000_000)));</span> <span class="doccomment">/// assert_eq!(Duration::new(2, 0).checked_div(0), None);</span> <span class="doccomment">/// ```</span> <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"duration_checked_ops"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.16.0"</span>)]</span> <span class="attribute">#[<span class="ident">inline</span>]</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">checked_div</span>(<span class="self">self</span>, <span class="ident">rhs</span>: <span class="ident">u32</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">Duration</span><span class="op">></span> { <span class="kw">if</span> <span class="ident">rhs</span> <span class="op">!=</span> <span class="number">0</span> { <span class="kw">let</span> <span class="ident">secs</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">secs</span> <span class="op">/</span> (<span class="ident">rhs</span> <span class="kw">as</span> <span class="ident">u64</span>); <span class="kw">let</span> <span class="ident">carry</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">secs</span> <span class="op">-</span> <span class="ident">secs</span> <span class="op">*</span> (<span class="ident">rhs</span> <span class="kw">as</span> <span class="ident">u64</span>); <span class="kw">let</span> <span class="ident">extra_nanos</span> <span class="op">=</span> <span class="ident">carry</span> <span class="op">*</span> (<span class="ident">NANOS_PER_SEC</span> <span class="kw">as</span> <span class="ident">u64</span>) <span class="op">/</span> (<span class="ident">rhs</span> <span class="kw">as</span> <span class="ident">u64</span>); <span class="kw">let</span> <span class="ident">nanos</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">nanos</span> <span class="op">/</span> <span class="ident">rhs</span> <span class="op">+</span> (<span class="ident">extra_nanos</span> <span class="kw">as</span> <span class="ident">u32</span>); <span class="macro">debug_assert</span><span class="macro">!</span>(<span class="ident">nanos</span> <span class="op"><</span> <span class="ident">NANOS_PER_SEC</span>); <span class="prelude-val">Some</span>(<span class="ident">Duration</span> { <span class="ident">secs</span>: <span class="ident">secs</span>, <span class="ident">nanos</span>: <span class="ident">nanos</span> }) } <span class="kw">else</span> { <span class="prelude-val">None</span> } } } <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"duration"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.3.0"</span>)]</span> <span class="kw">impl</span> <span class="ident">Add</span> <span class="kw">for</span> <span class="ident">Duration</span> { <span class="kw">type</span> <span class="ident">Output</span> <span class="op">=</span> <span class="ident">Duration</span>; <span class="kw">fn</span> <span class="ident">add</span>(<span class="self">self</span>, <span class="ident">rhs</span>: <span class="ident">Duration</span>) <span class="op">-></span> <span class="ident">Duration</span> { <span class="self">self</span>.<span class="ident">checked_add</span>(<span class="ident">rhs</span>).<span class="ident">expect</span>(<span class="string">"overflow when adding durations"</span>) } } <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"time_augmented_assignment"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.9.0"</span>)]</span> <span class="kw">impl</span> <span class="ident">AddAssign</span> <span class="kw">for</span> <span class="ident">Duration</span> { <span class="kw">fn</span> <span class="ident">add_assign</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">rhs</span>: <span class="ident">Duration</span>) { <span class="kw-2">*</span><span class="self">self</span> <span class="op">=</span> <span class="kw-2">*</span><span class="self">self</span> <span class="op">+</span> <span class="ident">rhs</span>; } } <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"duration"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.3.0"</span>)]</span> <span class="kw">impl</span> <span class="ident">Sub</span> <span class="kw">for</span> <span class="ident">Duration</span> { <span class="kw">type</span> <span class="ident">Output</span> <span class="op">=</span> <span class="ident">Duration</span>; <span class="kw">fn</span> <span class="ident">sub</span>(<span class="self">self</span>, <span class="ident">rhs</span>: <span class="ident">Duration</span>) <span class="op">-></span> <span class="ident">Duration</span> { <span class="self">self</span>.<span class="ident">checked_sub</span>(<span class="ident">rhs</span>).<span class="ident">expect</span>(<span class="string">"overflow when subtracting durations"</span>) } } <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"time_augmented_assignment"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.9.0"</span>)]</span> <span class="kw">impl</span> <span class="ident">SubAssign</span> <span class="kw">for</span> <span class="ident">Duration</span> { <span class="kw">fn</span> <span class="ident">sub_assign</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">rhs</span>: <span class="ident">Duration</span>) { <span class="kw-2">*</span><span class="self">self</span> <span class="op">=</span> <span class="kw-2">*</span><span class="self">self</span> <span class="op">-</span> <span class="ident">rhs</span>; } } <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"duration"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.3.0"</span>)]</span> <span class="kw">impl</span> <span class="ident">Mul</span><span class="op"><</span><span class="ident">u32</span><span class="op">></span> <span class="kw">for</span> <span class="ident">Duration</span> { <span class="kw">type</span> <span class="ident">Output</span> <span class="op">=</span> <span class="ident">Duration</span>; <span class="kw">fn</span> <span class="ident">mul</span>(<span class="self">self</span>, <span class="ident">rhs</span>: <span class="ident">u32</span>) <span class="op">-></span> <span class="ident">Duration</span> { <span class="self">self</span>.<span class="ident">checked_mul</span>(<span class="ident">rhs</span>).<span class="ident">expect</span>(<span class="string">"overflow when multiplying duration by scalar"</span>) } } <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"time_augmented_assignment"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.9.0"</span>)]</span> <span class="kw">impl</span> <span class="ident">MulAssign</span><span class="op"><</span><span class="ident">u32</span><span class="op">></span> <span class="kw">for</span> <span class="ident">Duration</span> { <span class="kw">fn</span> <span class="ident">mul_assign</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">rhs</span>: <span class="ident">u32</span>) { <span class="kw-2">*</span><span class="self">self</span> <span class="op">=</span> <span class="kw-2">*</span><span class="self">self</span> <span class="op">*</span> <span class="ident">rhs</span>; } } <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"duration"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.3.0"</span>)]</span> <span class="kw">impl</span> <span class="ident">Div</span><span class="op"><</span><span class="ident">u32</span><span class="op">></span> <span class="kw">for</span> <span class="ident">Duration</span> { <span class="kw">type</span> <span class="ident">Output</span> <span class="op">=</span> <span class="ident">Duration</span>; <span class="kw">fn</span> <span class="ident">div</span>(<span class="self">self</span>, <span class="ident">rhs</span>: <span class="ident">u32</span>) <span class="op">-></span> <span class="ident">Duration</span> { <span class="self">self</span>.<span class="ident">checked_div</span>(<span class="ident">rhs</span>).<span class="ident">expect</span>(<span class="string">"divide by zero error when dividing duration by scalar"</span>) } } <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"time_augmented_assignment"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.9.0"</span>)]</span> <span class="kw">impl</span> <span class="ident">DivAssign</span><span class="op"><</span><span class="ident">u32</span><span class="op">></span> <span class="kw">for</span> <span class="ident">Duration</span> { <span class="kw">fn</span> <span class="ident">div_assign</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">rhs</span>: <span class="ident">u32</span>) { <span class="kw-2">*</span><span class="self">self</span> <span class="op">=</span> <span class="kw-2">*</span><span class="self">self</span> <span class="op">/</span> <span class="ident">rhs</span>; } } <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"duration_sum"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.16.0"</span>)]</span> <span class="kw">impl</span> <span class="ident">Sum</span> <span class="kw">for</span> <span class="ident">Duration</span> { <span class="kw">fn</span> <span class="ident">sum</span><span class="op"><</span><span class="ident">I</span>: <span class="ident">Iterator</span><span class="op"><</span><span class="ident">Item</span><span class="op">=</span><span class="ident">Duration</span><span class="op">>></span>(<span class="ident">iter</span>: <span class="ident">I</span>) <span class="op">-></span> <span class="ident">Duration</span> { <span class="ident">iter</span>.<span class="ident">fold</span>(<span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">0</span>, <span class="number">0</span>), <span class="op">|</span><span class="ident">a</span>, <span class="ident">b</span><span class="op">|</span> <span class="ident">a</span> <span class="op">+</span> <span class="ident">b</span>) } } <span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"duration_sum"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.16.0"</span>)]</span> <span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> <span class="ident">Sum</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">Duration</span><span class="op">></span> <span class="kw">for</span> <span class="ident">Duration</span> { <span class="kw">fn</span> <span class="ident">sum</span><span class="op"><</span><span class="ident">I</span>: <span class="ident">Iterator</span><span class="op"><</span><span class="ident">Item</span><span class="op">=</span><span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">Duration</span><span class="op">>></span>(<span class="ident">iter</span>: <span class="ident">I</span>) <span class="op">-></span> <span class="ident">Duration</span> { <span class="ident">iter</span>.<span class="ident">fold</span>(<span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">0</span>, <span class="number">0</span>), <span class="op">|</span><span class="ident">a</span>, <span class="ident">b</span><span class="op">|</span> <span class="ident">a</span> <span class="op">+</span> <span class="kw-2">*</span><span class="ident">b</span>) } } <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">test</span>)]</span> <span class="kw">mod</span> <span class="ident">tests</span> { <span class="kw">use</span> <span class="kw">super</span>::<span class="ident">Duration</span>; <span class="attribute">#[<span class="ident">test</span>]</span> <span class="kw">fn</span> <span class="ident">creation</span>() { <span class="macro">assert</span><span class="macro">!</span>(<span class="ident">Duration</span>::<span class="ident">from_secs</span>(<span class="number">1</span>) <span class="op">!=</span> <span class="ident">Duration</span>::<span class="ident">from_secs</span>(<span class="number">0</span>)); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Duration</span>::<span class="ident">from_secs</span>(<span class="number">1</span>) <span class="op">+</span> <span class="ident">Duration</span>::<span class="ident">from_secs</span>(<span class="number">2</span>), <span class="ident">Duration</span>::<span class="ident">from_secs</span>(<span class="number">3</span>)); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Duration</span>::<span class="ident">from_millis</span>(<span class="number">10</span>) <span class="op">+</span> <span class="ident">Duration</span>::<span class="ident">from_secs</span>(<span class="number">4</span>), <span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">4</span>, <span class="number">10</span> <span class="op">*</span> <span class="number">1_000_000</span>)); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Duration</span>::<span class="ident">from_millis</span>(<span class="number">4000</span>), <span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">4</span>, <span class="number">0</span>)); } <span class="attribute">#[<span class="ident">test</span>]</span> <span class="kw">fn</span> <span class="ident">secs</span>() { <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">0</span>, <span class="number">0</span>).<span class="ident">as_secs</span>(), <span class="number">0</span>); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Duration</span>::<span class="ident">from_secs</span>(<span class="number">1</span>).<span class="ident">as_secs</span>(), <span class="number">1</span>); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Duration</span>::<span class="ident">from_millis</span>(<span class="number">999</span>).<span class="ident">as_secs</span>(), <span class="number">0</span>); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Duration</span>::<span class="ident">from_millis</span>(<span class="number">1001</span>).<span class="ident">as_secs</span>(), <span class="number">1</span>); } <span class="attribute">#[<span class="ident">test</span>]</span> <span class="kw">fn</span> <span class="ident">nanos</span>() { <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">0</span>, <span class="number">0</span>).<span class="ident">subsec_nanos</span>(), <span class="number">0</span>); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">0</span>, <span class="number">5</span>).<span class="ident">subsec_nanos</span>(), <span class="number">5</span>); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">0</span>, <span class="number">1_000_000_001</span>).<span class="ident">subsec_nanos</span>(), <span class="number">1</span>); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Duration</span>::<span class="ident">from_secs</span>(<span class="number">1</span>).<span class="ident">subsec_nanos</span>(), <span class="number">0</span>); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Duration</span>::<span class="ident">from_millis</span>(<span class="number">999</span>).<span class="ident">subsec_nanos</span>(), <span class="number">999</span> <span class="op">*</span> <span class="number">1_000_000</span>); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Duration</span>::<span class="ident">from_millis</span>(<span class="number">1001</span>).<span class="ident">subsec_nanos</span>(), <span class="number">1</span> <span class="op">*</span> <span class="number">1_000_000</span>); } <span class="attribute">#[<span class="ident">test</span>]</span> <span class="kw">fn</span> <span class="ident">add</span>() { <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">0</span>, <span class="number">0</span>) <span class="op">+</span> <span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">0</span>, <span class="number">1</span>), <span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">0</span>, <span class="number">1</span>)); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">0</span>, <span class="number">500_000_000</span>) <span class="op">+</span> <span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">0</span>, <span class="number">500_000_001</span>), <span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">1</span>, <span class="number">1</span>)); } <span class="attribute">#[<span class="ident">test</span>]</span> <span class="kw">fn</span> <span class="ident">checked_add</span>() { <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">0</span>, <span class="number">0</span>).<span class="ident">checked_add</span>(<span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">0</span>, <span class="number">1</span>)), <span class="prelude-val">Some</span>(<span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">0</span>, <span class="number">1</span>))); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">0</span>, <span class="number">500_000_000</span>).<span class="ident">checked_add</span>(<span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">0</span>, <span class="number">500_000_001</span>)), <span class="prelude-val">Some</span>(<span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">1</span>, <span class="number">1</span>))); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">1</span>, <span class="number">0</span>).<span class="ident">checked_add</span>(<span class="ident">Duration</span>::<span class="ident">new</span>(::<span class="ident">u64</span>::<span class="ident">MAX</span>, <span class="number">0</span>)), <span class="prelude-val">None</span>); } <span class="attribute">#[<span class="ident">test</span>]</span> <span class="kw">fn</span> <span class="ident">sub</span>() { <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">0</span>, <span class="number">1</span>) <span class="op">-</span> <span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">0</span>, <span class="number">0</span>), <span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">0</span>, <span class="number">1</span>)); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">0</span>, <span class="number">500_000_001</span>) <span class="op">-</span> <span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">0</span>, <span class="number">500_000_000</span>), <span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">0</span>, <span class="number">1</span>)); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">1</span>, <span class="number">0</span>) <span class="op">-</span> <span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">0</span>, <span class="number">1</span>), <span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">0</span>, <span class="number">999_999_999</span>)); } <span class="attribute">#[<span class="ident">test</span>]</span> <span class="kw">fn</span> <span class="ident">checked_sub</span>() { <span class="kw">let</span> <span class="ident">zero</span> <span class="op">=</span> <span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">0</span>, <span class="number">0</span>); <span class="kw">let</span> <span class="ident">one_nano</span> <span class="op">=</span> <span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">0</span>, <span class="number">1</span>); <span class="kw">let</span> <span class="ident">one_sec</span> <span class="op">=</span> <span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">1</span>, <span class="number">0</span>); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">one_nano</span>.<span class="ident">checked_sub</span>(<span class="ident">zero</span>), <span class="prelude-val">Some</span>(<span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">0</span>, <span class="number">1</span>))); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">one_sec</span>.<span class="ident">checked_sub</span>(<span class="ident">one_nano</span>), <span class="prelude-val">Some</span>(<span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">0</span>, <span class="number">999_999_999</span>))); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">zero</span>.<span class="ident">checked_sub</span>(<span class="ident">one_nano</span>), <span class="prelude-val">None</span>); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">zero</span>.<span class="ident">checked_sub</span>(<span class="ident">one_sec</span>), <span class="prelude-val">None</span>); } <span class="attribute">#[<span class="ident">test</span>]</span> <span class="attribute">#[<span class="ident">should_panic</span>]</span> <span class="kw">fn</span> <span class="ident">sub_bad1</span>() { <span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">0</span>, <span class="number">0</span>) <span class="op">-</span> <span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">0</span>, <span class="number">1</span>); } <span class="attribute">#[<span class="ident">test</span>]</span> <span class="attribute">#[<span class="ident">should_panic</span>]</span> <span class="kw">fn</span> <span class="ident">sub_bad2</span>() { <span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">0</span>, <span class="number">0</span>) <span class="op">-</span> <span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">1</span>, <span class="number">0</span>); } <span class="attribute">#[<span class="ident">test</span>]</span> <span class="kw">fn</span> <span class="ident">mul</span>() { <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">0</span>, <span class="number">1</span>) <span class="op">*</span> <span class="number">2</span>, <span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">0</span>, <span class="number">2</span>)); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">1</span>, <span class="number">1</span>) <span class="op">*</span> <span class="number">3</span>, <span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">3</span>, <span class="number">3</span>)); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">0</span>, <span class="number">500_000_001</span>) <span class="op">*</span> <span class="number">4</span>, <span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">2</span>, <span class="number">4</span>)); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">0</span>, <span class="number">500_000_001</span>) <span class="op">*</span> <span class="number">4000</span>, <span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">2000</span>, <span class="number">4000</span>)); } <span class="attribute">#[<span class="ident">test</span>]</span> <span class="kw">fn</span> <span class="ident">checked_mul</span>() { <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">0</span>, <span class="number">1</span>).<span class="ident">checked_mul</span>(<span class="number">2</span>), <span class="prelude-val">Some</span>(<span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">0</span>, <span class="number">2</span>))); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">1</span>, <span class="number">1</span>).<span class="ident">checked_mul</span>(<span class="number">3</span>), <span class="prelude-val">Some</span>(<span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">3</span>, <span class="number">3</span>))); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">0</span>, <span class="number">500_000_001</span>).<span class="ident">checked_mul</span>(<span class="number">4</span>), <span class="prelude-val">Some</span>(<span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">2</span>, <span class="number">4</span>))); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">0</span>, <span class="number">500_000_001</span>).<span class="ident">checked_mul</span>(<span class="number">4000</span>), <span class="prelude-val">Some</span>(<span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">2000</span>, <span class="number">4000</span>))); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Duration</span>::<span class="ident">new</span>(::<span class="ident">u64</span>::<span class="ident">MAX</span> <span class="op">-</span> <span class="number">1</span>, <span class="number">0</span>).<span class="ident">checked_mul</span>(<span class="number">2</span>), <span class="prelude-val">None</span>); } <span class="attribute">#[<span class="ident">test</span>]</span> <span class="kw">fn</span> <span class="ident">div</span>() { <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">0</span>, <span class="number">1</span>) <span class="op">/</span> <span class="number">2</span>, <span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">0</span>, <span class="number">0</span>)); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">1</span>, <span class="number">1</span>) <span class="op">/</span> <span class="number">3</span>, <span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">0</span>, <span class="number">333_333_333</span>)); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">99</span>, <span class="number">999_999_000</span>) <span class="op">/</span> <span class="number">100</span>, <span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">0</span>, <span class="number">999_999_990</span>)); } <span class="attribute">#[<span class="ident">test</span>]</span> <span class="kw">fn</span> <span class="ident">checked_div</span>() { <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">2</span>, <span class="number">0</span>).<span class="ident">checked_div</span>(<span class="number">2</span>), <span class="prelude-val">Some</span>(<span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">1</span>, <span class="number">0</span>))); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">1</span>, <span class="number">0</span>).<span class="ident">checked_div</span>(<span class="number">2</span>), <span class="prelude-val">Some</span>(<span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">0</span>, <span class="number">500_000_000</span>))); <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">Duration</span>::<span class="ident">new</span>(<span class="number">2</span>, <span class="number">0</span>).<span class="ident">checked_div</span>(<span class="number">0</span>), <span class="prelude-val">None</span>); } } </pre> </section> <section id='search' class="content hidden"></section> <section class="footer"></section> <aside id="help" class="hidden"> <div> <h1 class="hidden">Help</h1> <div class="shortcuts"> <h2>Keyboard Shortcuts</h2> <dl> <dt><kbd>?</kbd></dt> <dd>Show this help dialog</dd> <dt><kbd>S</kbd></dt> <dd>Focus the search field</dd> <dt><kbd>↑</kbd></dt> <dd>Move up in search results</dd> <dt><kbd>↓</kbd></dt> <dd>Move down in search results</dd> <dt><kbd>↹</kbd></dt> <dd>Switch tab</dd> <dt><kbd>⏎</kbd></dt> <dd>Go to active search result</dd> <dt><kbd>+</kbd></dt> <dd>Expand all sections</dd> <dt><kbd>-</kbd></dt> <dd>Collapse all sections</dd> </dl> </div> <div class="infos"> <h2>Search Tricks</h2> <p> Prefix searches with a type followed by a colon (e.g. <code>fn:</code>) to restrict the search to a given type. </p> <p> Accepted types are: <code>fn</code>, <code>mod</code>, <code>struct</code>, <code>enum</code>, <code>trait</code>, <code>type</code>, <code>macro</code>, and <code>const</code>. </p> <p> Search functions by type signature (e.g. <code>vec -> usize</code> or <code>* -> vec</code>) </p> </div> </div> </aside> <script> window.rootPath = "../../"; 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