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<!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 `src/uu/nl/src/helper.rs`."><title>helper.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceSerif4-Regular-46f98efaafac5295.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/FiraSans-Regular-018c141bf0843ffd.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/FiraSans-Medium-8f9a781e4970d388.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceCodePro-Regular-562dcc5011b6de7d.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceSerif4-Bold-a2c9cd1067f8b328.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceCodePro-Semibold-d899c5a5c4aeb14a.ttf.woff2"><link rel="stylesheet" href="../../static.files/normalize-76eba96aa4d2e634.css"><link rel="stylesheet" href="../../static.files/rustdoc-ba5701c5741a7b69.css" id="mainThemeStyle"><div id="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="uu_nl" data-themes="" data-resource-suffix="" data-rustdoc-version="1.70.0 (90c541806 2023-05-31)" data-search-js="search-e077946657036a58.js" data-settings-js="settings-298e1ea74db45b39.js" data-settings-css="settings-7bfb4c59cc6bc502.css" data-theme-light-css="light-0f8c037637f9eb3e.css" data-theme-dark-css="dark-1097f8e92a01e3cf.css" data-theme-ayu-css="ayu-614652228113ac93.css" ></div><script src="../../static.files/storage-62ce34ea385b278a.js"></script><script defer src="../../static.files/source-script-905937fbbdc8e9ea.js"></script><script defer src="../../source-files.js"></script><script defer src="../../static.files/main-f61008743c98d196.js"></script><noscript><link rel="stylesheet" media="(prefers-color-scheme:light)" href="../../static.files/light-0f8c037637f9eb3e.css"><link rel="stylesheet" media="(prefers-color-scheme:dark)" href="../../static.files/dark-1097f8e92a01e3cf.css"><link rel="stylesheet" href="../../static.files/noscript-13285aec31fa243e.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-16x16-8b506e7a72182f1c.png"><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-422f7d1d52889060.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-2c020d218678b618.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"></nav><main><nav class="sub"><a class="sub-logo-container" href="../../uu_nl/index.html"><img class="rust-logo" src="../../static.files/rust-logo-151179464ae7ed46.svg" alt="logo"></a><form class="search-form"><span></span><input class="search-input" name="search" aria-label="Run search in the documentation" 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="../../static.files/wheel-7b819b6101059cd0.svg"></a></div></form></nav><section id="main-content" class="content"><div class="example-wrap"><div data-nosnippet><pre class="src-line-numbers"><a href="#1" id="1">1</a>
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</pre></div><pre class="rust"><code><span class="comment">// spell-checker:ignore (ToDO) conv
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</span><span class="kw">use </span><span class="kw">crate</span>::options;
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<span class="comment">// parse_style parses a style string into a NumberingStyle.
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</span><span class="kw">fn </span>parse_style(chars: <span class="kw-2">&</span>[char]) -> <span class="prelude-ty">Result</span><<span class="kw">crate</span>::NumberingStyle, String> {
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<span class="kw">if </span>chars.len() == <span class="number">1 </span>&& chars[<span class="number">0</span>] == <span class="string">'a' </span>{
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<span class="prelude-val">Ok</span>(<span class="kw">crate</span>::NumberingStyle::NumberForAll)
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} <span class="kw">else if </span>chars.len() == <span class="number">1 </span>&& chars[<span class="number">0</span>] == <span class="string">'t' </span>{
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<span class="prelude-val">Ok</span>(<span class="kw">crate</span>::NumberingStyle::NumberForNonEmpty)
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} <span class="kw">else if </span>chars.len() == <span class="number">1 </span>&& chars[<span class="number">0</span>] == <span class="string">'n' </span>{
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<span class="prelude-val">Ok</span>(<span class="kw">crate</span>::NumberingStyle::NumberForNone)
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} <span class="kw">else if </span>chars.len() > <span class="number">1 </span>&& chars[<span class="number">0</span>] == <span class="string">'p' </span>{
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<span class="kw">let </span>s: String = chars[<span class="number">1</span>..].iter().cloned().collect();
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<span class="kw">match </span>regex::Regex::new(<span class="kw-2">&</span>s) {
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<span class="prelude-val">Ok</span>(re) => <span class="prelude-val">Ok</span>(<span class="kw">crate</span>::NumberingStyle::NumberForRegularExpression(Box::new(
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re,
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))),
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<span class="prelude-val">Err</span>(<span class="kw">_</span>) => <span class="prelude-val">Err</span>(String::from(<span class="string">"Illegal regular expression"</span>)),
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}
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} <span class="kw">else </span>{
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<span class="prelude-val">Err</span>(String::from(<span class="string">"Illegal style encountered"</span>))
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}
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}
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<span class="comment">// parse_options loads the options into the settings, returning an array of
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// error messages.
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</span><span class="attr">#[allow(clippy::cognitive_complexity)]
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</span><span class="kw">pub fn </span>parse_options(settings: <span class="kw-2">&mut </span><span class="kw">crate</span>::Settings, opts: <span class="kw-2">&</span>clap::ArgMatches) -> Vec<String> {
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<span class="comment">// This vector holds error messages encountered.
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</span><span class="kw">let </span><span class="kw-2">mut </span>errs: Vec<String> = <span class="macro">vec!</span>[];
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settings.renumber = opts.get_flag(options::NO_RENUMBER);
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<span class="kw">match </span>opts.get_one::<String>(options::NUMBER_SEPARATOR) {
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<span class="prelude-val">None </span>=> {}
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<span class="prelude-val">Some</span>(val) => {
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settings.number_separator = val.to_owned();
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}
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}
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settings.number_format = opts
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.get_one::<String>(options::NUMBER_FORMAT)
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.map(Into::into)
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.unwrap_or_default();
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<span class="kw">match </span>opts.get_one::<String>(options::BODY_NUMBERING) {
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<span class="prelude-val">None </span>=> {}
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<span class="prelude-val">Some</span>(val) => {
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<span class="kw">let </span>chars: Vec<char> = val.chars().collect();
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<span class="kw">match </span>parse_style(<span class="kw-2">&</span>chars) {
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<span class="prelude-val">Ok</span>(s) => {
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settings.body_numbering = s;
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}
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<span class="prelude-val">Err</span>(message) => {
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errs.push(message);
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}
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}
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}
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}
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<span class="kw">match </span>opts.get_one::<String>(options::FOOTER_NUMBERING) {
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<span class="prelude-val">None </span>=> {}
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<span class="prelude-val">Some</span>(val) => {
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<span class="kw">let </span>chars: Vec<char> = val.chars().collect();
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<span class="kw">match </span>parse_style(<span class="kw-2">&</span>chars) {
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<span class="prelude-val">Ok</span>(s) => {
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settings.footer_numbering = s;
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}
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<span class="prelude-val">Err</span>(message) => {
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errs.push(message);
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}
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}
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}
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}
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<span class="kw">match </span>opts.get_one::<String>(options::HEADER_NUMBERING) {
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<span class="prelude-val">None </span>=> {}
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<span class="prelude-val">Some</span>(val) => {
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<span class="kw">let </span>chars: Vec<char> = val.chars().collect();
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<span class="kw">match </span>parse_style(<span class="kw-2">&</span>chars) {
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<span class="prelude-val">Ok</span>(s) => {
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settings.header_numbering = s;
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}
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<span class="prelude-val">Err</span>(message) => {
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errs.push(message);
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}
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}
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}
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}
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||
<span class="kw">match </span>opts.get_one::<String>(options::LINE_INCREMENT) {
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<span class="prelude-val">None </span>=> {}
|
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<span class="prelude-val">Some</span>(val) => {
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<span class="kw">let </span>conv: <span class="prelude-ty">Option</span><u64> = val.parse().ok();
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<span class="kw">match </span>conv {
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<span class="prelude-val">None </span>=> {
|
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errs.push(String::from(<span class="string">"Illegal value for -i"</span>));
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}
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<span class="prelude-val">Some</span>(num) => settings.line_increment = num,
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||
}
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}
|
||
}
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<span class="kw">match </span>opts.get_one::<String>(options::NUMBER_WIDTH) {
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<span class="prelude-val">None </span>=> {}
|
||
<span class="prelude-val">Some</span>(val) => {
|
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<span class="kw">let </span>conv: <span class="prelude-ty">Option</span><usize> = val.parse().ok();
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<span class="kw">match </span>conv {
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<span class="prelude-val">None </span>=> {
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errs.push(String::from(<span class="string">"Illegal value for -w"</span>));
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}
|
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<span class="prelude-val">Some</span>(num) => settings.number_width = num,
|
||
}
|
||
}
|
||
}
|
||
<span class="kw">match </span>opts.get_one::<String>(options::STARTING_LINE_NUMBER) {
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||
<span class="prelude-val">None </span>=> {}
|
||
<span class="prelude-val">Some</span>(val) => {
|
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<span class="kw">let </span>conv: <span class="prelude-ty">Option</span><u64> = val.parse().ok();
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<span class="kw">match </span>conv {
|
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<span class="prelude-val">None </span>=> {
|
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errs.push(String::from(<span class="string">"Illegal value for -v"</span>));
|
||
}
|
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<span class="prelude-val">Some</span>(num) => settings.starting_line_number = num,
|
||
}
|
||
}
|
||
}
|
||
<span class="kw">match </span>opts.get_one::<String>(options::JOIN_BLANK_LINES) {
|
||
<span class="prelude-val">None </span>=> {}
|
||
<span class="prelude-val">Some</span>(val) => {
|
||
<span class="kw">let </span>conv: <span class="prelude-ty">Option</span><u64> = val.parse().ok();
|
||
<span class="kw">match </span>conv {
|
||
<span class="prelude-val">None </span>=> {
|
||
errs.push(String::from(<span class="string">"Illegal value for -l"</span>));
|
||
}
|
||
<span class="prelude-val">Some</span>(num) => settings.join_blank_lines = num,
|
||
}
|
||
}
|
||
}
|
||
errs
|
||
}
|
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</code></pre></div></section></main></body></html> |