| <!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/time-0.3.21/src/parsing/shim.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>shim.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="icon" href="https://avatars0.githubusercontent.com/u/55999857"></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="../../../time/index.html"><div class="logo-container"> |
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| <img src="https://avatars0.githubusercontent.com/u/55999857" 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="doccomment">//! Extension traits for things either not implemented or not yet stable in the MSRV. |
| |
| /// Equivalent of `foo.parse()` for slices. |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">trait </span>IntegerParseBytes<T> { |
| <span class="attribute">#[allow(clippy::missing_docs_in_private_items)] |
| </span><span class="kw">fn </span>parse_bytes(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><T>; |
| } |
| |
| <span class="kw">impl</span><T: Integer> IntegerParseBytes<T> <span class="kw">for </span>[u8] { |
| <span class="kw">fn </span>parse_bytes(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><T> { |
| T::parse_bytes(<span class="self">self</span>) |
| } |
| } |
| |
| <span class="doccomment">/// Marker trait for all integer types, including `NonZero*` |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">trait </span>Integer: Sized { |
| <span class="attribute">#[allow(clippy::missing_docs_in_private_items)] |
| </span><span class="kw">fn </span>parse_bytes(src: <span class="kw-2">&</span>[u8]) -> <span class="prelude-ty">Option</span><<span class="self">Self</span>>; |
| } |
| |
| <span class="doccomment">/// Parse the given types from bytes. |
| </span><span class="macro">macro_rules! </span>impl_parse_bytes { |
| ($(<span class="macro-nonterminal">$t</span>:ty)<span class="kw-2">*</span>) => ($( |
| <span class="kw">impl </span>Integer <span class="kw">for </span><span class="macro-nonterminal">$t </span>{ |
| <span class="attribute">#[allow(trivial_numeric_casts)] |
| </span><span class="kw">fn </span>parse_bytes(src: <span class="kw-2">&</span>[u8]) -> <span class="prelude-ty">Option</span><<span class="self">Self</span>> { |
| src.iter().try_fold::<<span class="self">Self</span>, <span class="kw">_</span>, <span class="kw">_</span>>(<span class="number">0</span>, |result, c| { |
| result.checked_mul(<span class="number">10</span>)<span class="question-mark">?</span>.checked_add((c - <span class="string">b'0'</span>) <span class="kw">as </span><span class="self">Self</span>) |
| }) |
| } |
| } |
| )<span class="kw-2">*</span>) |
| } |
| <span class="macro">impl_parse_bytes! </span>{ u8 u16 u32 u128 } |
| |
| <span class="doccomment">/// Parse the given types from bytes. |
| </span><span class="macro">macro_rules! </span>impl_parse_bytes_nonzero { |
| ($(<span class="macro-nonterminal">$t</span>:ty)<span class="kw-2">*</span>) => {$( |
| <span class="kw">impl </span>Integer <span class="kw">for </span><span class="macro-nonterminal">$t </span>{ |
| <span class="kw">fn </span>parse_bytes(src: <span class="kw-2">&</span>[u8]) -> <span class="prelude-ty">Option</span><<span class="self">Self</span>> { |
| <span class="self">Self</span>::new(src.parse_bytes()<span class="question-mark">?</span>) |
| } |
| } |
| )<span class="kw-2">*</span>} |
| } |
| |
| <span class="macro">impl_parse_bytes_nonzero! </span>{ |
| core::num::NonZeroU8 |
| core::num::NonZeroU16 |
| } |
| </code></pre></div> |
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