<!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 to the Rust file `libstd/ascii.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>ascii.rs.html -- source</title><link rel="stylesheet" type="text/css" href="../../normalize.css"><link rel="stylesheet" type="text/css" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../dark.css"><link rel="stylesheet" type="text/css" href="../../light.css" id="themeStyle"><script src="../../storage.js"></script><link rel="shortcut icon" href="https://doc.rust-lang.org/favicon.ico"></head><body class="rustdoc source"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">☰</div><a href='../../std/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"><a id="settings-menu" href="../../settings.html"><img src="../../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><pre class="line-numbers"><span id="1"> 1</span>
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</pre><pre class="rust ">
<span class="comment">// Copyright 2013-2014 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="doccomment">//! Operations on ASCII strings and characters.</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! Most string operations in Rust act on UTF-8 strings. However, at times it</span>
<span class="doccomment">//! makes more sense to only consider the ASCII character set for a specific</span>
<span class="doccomment">//! operation.</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! The [`AsciiExt`] trait provides methods that allow for character</span>
<span class="doccomment">//! operations that only act on the ASCII subset and leave non-ASCII characters</span>
<span class="doccomment">//! alone.</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! The [`escape_default`] function provides an iterator over the bytes of an</span>
<span class="doccomment">//! escaped version of the character given.</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! [`AsciiExt`]: trait.AsciiExt.html</span>
<span class="doccomment">//! [`escape_default`]: fn.escape_default.html</span>
<span class="attribute">#![<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">core</span>::<span class="ident">ascii</span>::{<span class="ident">EscapeDefault</span>, <span class="ident">escape_default</span>};
<span class="doccomment">/// Extension methods for ASCII-subset only operations.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Be aware that operations on seemingly non-ASCII characters can sometimes</span>
<span class="doccomment">/// have unexpected results. Consider this example:</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::ascii::AsciiExt;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// assert_eq!(AsciiExt::to_ascii_uppercase("café"), "CAFÉ");</span>
<span class="doccomment">/// assert_eq!(AsciiExt::to_ascii_uppercase("café"), "CAFé");</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">///</span>
<span class="doccomment">/// In the first example, the lowercased string is represented `"cafe\u{301}"`</span>
<span class="doccomment">/// (the last character is an acute accent [combining character]). Unlike the</span>
<span class="doccomment">/// other characters in the string, the combining character will not get mapped</span>
<span class="doccomment">/// to an uppercase variant, resulting in `"CAFE\u{301}"`. In the second</span>
<span class="doccomment">/// example, the lowercased string is represented `"caf\u{e9}"` (the last</span>
<span class="doccomment">/// character is a single Unicode character representing an 'e' with an acute</span>
<span class="doccomment">/// accent). Since the last character is defined outside the scope of ASCII,</span>
<span class="doccomment">/// it will not get mapped to an uppercase variant, resulting in `"CAF\u{e9}"`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [combining character]: https://en.wikipedia.org/wiki/Combining_character</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="attribute">#[<span class="ident">rustc_deprecated</span>(<span class="ident">since</span> <span class="op">=</span> <span class="string">"1.26.0"</span>, <span class="ident">reason</span> <span class="op">=</span> <span class="string">"use inherent methods instead"</span>)]</span>
<span class="kw">pub</span> <span class="kw">trait</span> <span class="ident">AsciiExt</span> {
<span class="doccomment">/// Container type for copied ASCII characters.</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">type</span> <span class="ident">Owned</span>;
<span class="doccomment">/// Checks if the value is within the ASCII range.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Note</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This method will be deprecated in favor of the identically-named</span>
<span class="doccomment">/// inherent methods on `u8`, `char`, `[u8]` and `str`.</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">fn</span> <span class="ident">is_ascii</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span>;
<span class="doccomment">/// Makes a copy of the value in its ASCII upper case equivalent.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ASCII letters 'a' to 'z' are mapped to 'A' to 'Z',</span>
<span class="doccomment">/// but non-ASCII letters are unchanged.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// To uppercase the value in-place, use [`make_ascii_uppercase`].</span>
<span class="doccomment">///</span>
<span class="doccomment">/// To uppercase ASCII characters in addition to non-ASCII characters, use</span>
<span class="doccomment">/// [`str::to_uppercase`].</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Note</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This method will be deprecated in favor of the identically-named</span>
<span class="doccomment">/// inherent methods on `u8`, `char`, `[u8]` and `str`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`make_ascii_uppercase`]: #tymethod.make_ascii_uppercase</span>
<span class="doccomment">/// [`str::to_uppercase`]: ../primitive.str.html#method.to_uppercase</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="attribute">#[<span class="ident">allow</span>(<span class="ident">deprecated</span>)]</span>
<span class="kw">fn</span> <span class="ident">to_ascii_uppercase</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="self">Self</span>::<span class="ident">Owned</span>;
<span class="doccomment">/// Makes a copy of the value in its ASCII lower case equivalent.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ASCII letters 'A' to 'Z' are mapped to 'a' to 'z',</span>
<span class="doccomment">/// but non-ASCII letters are unchanged.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// To lowercase the value in-place, use [`make_ascii_lowercase`].</span>
<span class="doccomment">///</span>
<span class="doccomment">/// To lowercase ASCII characters in addition to non-ASCII characters, use</span>
<span class="doccomment">/// [`str::to_lowercase`].</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Note</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This method will be deprecated in favor of the identically-named</span>
<span class="doccomment">/// inherent methods on `u8`, `char`, `[u8]` and `str`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`make_ascii_lowercase`]: #tymethod.make_ascii_lowercase</span>
<span class="doccomment">/// [`str::to_lowercase`]: ../primitive.str.html#method.to_lowercase</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="attribute">#[<span class="ident">allow</span>(<span class="ident">deprecated</span>)]</span>
<span class="kw">fn</span> <span class="ident">to_ascii_lowercase</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="self">Self</span>::<span class="ident">Owned</span>;
<span class="doccomment">/// Checks that two values are an ASCII case-insensitive match.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Same as `to_ascii_lowercase(a) == to_ascii_lowercase(b)`,</span>
<span class="doccomment">/// but without allocating and copying temporaries.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Note</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This method will be deprecated in favor of the identically-named</span>
<span class="doccomment">/// inherent methods on `u8`, `char`, `[u8]` and `str`.</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="kw">fn</span> <span class="ident">eq_ignore_ascii_case</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">other</span>: <span class="kw-2">&</span><span class="self">Self</span>) <span class="op">-></span> <span class="ident">bool</span>;
<span class="doccomment">/// Converts this type to its ASCII upper case equivalent in-place.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ASCII letters 'a' to 'z' are mapped to 'A' to 'Z',</span>
<span class="doccomment">/// but non-ASCII letters are unchanged.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// To return a new uppercased value without modifying the existing one, use</span>
<span class="doccomment">/// [`to_ascii_uppercase`].</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Note</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This method will be deprecated in favor of the identically-named</span>
<span class="doccomment">/// inherent methods on `u8`, `char`, `[u8]` and `str`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`to_ascii_uppercase`]: #tymethod.to_ascii_uppercase</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"ascii"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.9.0"</span>)]</span>
<span class="kw">fn</span> <span class="ident">make_ascii_uppercase</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>);
<span class="doccomment">/// Converts this type to its ASCII lower case equivalent in-place.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ASCII letters 'A' to 'Z' are mapped to 'a' to 'z',</span>
<span class="doccomment">/// but non-ASCII letters are unchanged.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// To return a new lowercased value without modifying the existing one, use</span>
<span class="doccomment">/// [`to_ascii_lowercase`].</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Note</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This method will be deprecated in favor of the identically-named</span>
<span class="doccomment">/// inherent methods on `u8`, `char`, `[u8]` and `str`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [`to_ascii_lowercase`]: #tymethod.to_ascii_lowercase</span>
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"ascii"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.9.0"</span>)]</span>
<span class="kw">fn</span> <span class="ident">make_ascii_lowercase</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>);
<span class="doccomment">/// Checks if the value is an ASCII alphabetic character:</span>
<span class="doccomment">/// U+0041 'A' ... U+005A 'Z' or U+0061 'a' ... U+007A 'z'.</span>
<span class="doccomment">/// For strings, true if all characters in the string are</span>
<span class="doccomment">/// ASCII alphabetic.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Note</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This method will be deprecated in favor of the identically-named</span>
<span class="doccomment">/// inherent methods on `u8`, `char`, `[u8]` and `str`.</span>
<span class="attribute">#[<span class="ident">unstable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"ascii_ctype"</span>, <span class="ident">issue</span> <span class="op">=</span> <span class="string">"39658"</span>)]</span>
<span class="attribute">#[<span class="ident">rustc_deprecated</span>(<span class="ident">since</span> <span class="op">=</span> <span class="string">"1.26.0"</span>, <span class="ident">reason</span> <span class="op">=</span> <span class="string">"use inherent methods instead"</span>)]</span>
<span class="kw">fn</span> <span class="ident">is_ascii_alphabetic</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> { <span class="macro">unimplemented</span><span class="macro">!</span>(); }
<span class="doccomment">/// Checks if the value is an ASCII uppercase character:</span>
<span class="doccomment">/// U+0041 'A' ... U+005A 'Z'.</span>
<span class="doccomment">/// For strings, true if all characters in the string are</span>
<span class="doccomment">/// ASCII uppercase.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Note</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This method will be deprecated in favor of the identically-named</span>
<span class="doccomment">/// inherent methods on `u8`, `char`, `[u8]` and `str`.</span>
<span class="attribute">#[<span class="ident">unstable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"ascii_ctype"</span>, <span class="ident">issue</span> <span class="op">=</span> <span class="string">"39658"</span>)]</span>
<span class="attribute">#[<span class="ident">rustc_deprecated</span>(<span class="ident">since</span> <span class="op">=</span> <span class="string">"1.26.0"</span>, <span class="ident">reason</span> <span class="op">=</span> <span class="string">"use inherent methods instead"</span>)]</span>
<span class="kw">fn</span> <span class="ident">is_ascii_uppercase</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> { <span class="macro">unimplemented</span><span class="macro">!</span>(); }
<span class="doccomment">/// Checks if the value is an ASCII lowercase character:</span>
<span class="doccomment">/// U+0061 'a' ... U+007A 'z'.</span>
<span class="doccomment">/// For strings, true if all characters in the string are</span>
<span class="doccomment">/// ASCII lowercase.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Note</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This method will be deprecated in favor of the identically-named</span>
<span class="doccomment">/// inherent methods on `u8`, `char`, `[u8]` and `str`.</span>
<span class="attribute">#[<span class="ident">unstable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"ascii_ctype"</span>, <span class="ident">issue</span> <span class="op">=</span> <span class="string">"39658"</span>)]</span>
<span class="attribute">#[<span class="ident">rustc_deprecated</span>(<span class="ident">since</span> <span class="op">=</span> <span class="string">"1.26.0"</span>, <span class="ident">reason</span> <span class="op">=</span> <span class="string">"use inherent methods instead"</span>)]</span>
<span class="kw">fn</span> <span class="ident">is_ascii_lowercase</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> { <span class="macro">unimplemented</span><span class="macro">!</span>(); }
<span class="doccomment">/// Checks if the value is an ASCII alphanumeric character:</span>
<span class="doccomment">/// U+0041 'A' ... U+005A 'Z', U+0061 'a' ... U+007A 'z', or</span>
<span class="doccomment">/// U+0030 '0' ... U+0039 '9'.</span>
<span class="doccomment">/// For strings, true if all characters in the string are</span>
<span class="doccomment">/// ASCII alphanumeric.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Note</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This method will be deprecated in favor of the identically-named</span>
<span class="doccomment">/// inherent methods on `u8`, `char`, `[u8]` and `str`.</span>
<span class="attribute">#[<span class="ident">unstable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"ascii_ctype"</span>, <span class="ident">issue</span> <span class="op">=</span> <span class="string">"39658"</span>)]</span>
<span class="attribute">#[<span class="ident">rustc_deprecated</span>(<span class="ident">since</span> <span class="op">=</span> <span class="string">"1.26.0"</span>, <span class="ident">reason</span> <span class="op">=</span> <span class="string">"use inherent methods instead"</span>)]</span>
<span class="kw">fn</span> <span class="ident">is_ascii_alphanumeric</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> { <span class="macro">unimplemented</span><span class="macro">!</span>(); }
<span class="doccomment">/// Checks if the value is an ASCII decimal digit:</span>
<span class="doccomment">/// U+0030 '0' ... U+0039 '9'.</span>
<span class="doccomment">/// For strings, true if all characters in the string are</span>
<span class="doccomment">/// ASCII digits.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Note</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This method will be deprecated in favor of the identically-named</span>
<span class="doccomment">/// inherent methods on `u8`, `char`, `[u8]` and `str`.</span>
<span class="attribute">#[<span class="ident">unstable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"ascii_ctype"</span>, <span class="ident">issue</span> <span class="op">=</span> <span class="string">"39658"</span>)]</span>
<span class="attribute">#[<span class="ident">rustc_deprecated</span>(<span class="ident">since</span> <span class="op">=</span> <span class="string">"1.26.0"</span>, <span class="ident">reason</span> <span class="op">=</span> <span class="string">"use inherent methods instead"</span>)]</span>
<span class="kw">fn</span> <span class="ident">is_ascii_digit</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> { <span class="macro">unimplemented</span><span class="macro">!</span>(); }
<span class="doccomment">/// Checks if the value is an ASCII hexadecimal digit:</span>
<span class="doccomment">/// U+0030 '0' ... U+0039 '9', U+0041 'A' ... U+0046 'F', or</span>
<span class="doccomment">/// U+0061 'a' ... U+0066 'f'.</span>
<span class="doccomment">/// For strings, true if all characters in the string are</span>
<span class="doccomment">/// ASCII hex digits.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Note</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This method will be deprecated in favor of the identically-named</span>
<span class="doccomment">/// inherent methods on `u8`, `char`, `[u8]` and `str`.</span>
<span class="attribute">#[<span class="ident">unstable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"ascii_ctype"</span>, <span class="ident">issue</span> <span class="op">=</span> <span class="string">"39658"</span>)]</span>
<span class="attribute">#[<span class="ident">rustc_deprecated</span>(<span class="ident">since</span> <span class="op">=</span> <span class="string">"1.26.0"</span>, <span class="ident">reason</span> <span class="op">=</span> <span class="string">"use inherent methods instead"</span>)]</span>
<span class="kw">fn</span> <span class="ident">is_ascii_hexdigit</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> { <span class="macro">unimplemented</span><span class="macro">!</span>(); }
<span class="doccomment">/// Checks if the value is an ASCII punctuation character:</span>
<span class="doccomment">///</span>
<span class="doccomment">/// U+0021 ... U+002F `! " # $ % & ' ( ) * + , - . /`</span>
<span class="doccomment">/// U+003A ... U+0040 `: ; < = > ? @`</span>
<span class="doccomment">/// U+005B ... U+0060 ``[ \\ ] ^ _ ` ``</span>
<span class="doccomment">/// U+007B ... U+007E `{ | } ~`</span>
<span class="doccomment">///</span>
<span class="doccomment">/// For strings, true if all characters in the string are</span>
<span class="doccomment">/// ASCII punctuation.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Note</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This method will be deprecated in favor of the identically-named</span>
<span class="doccomment">/// inherent methods on `u8`, `char`, `[u8]` and `str`.</span>
<span class="attribute">#[<span class="ident">unstable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"ascii_ctype"</span>, <span class="ident">issue</span> <span class="op">=</span> <span class="string">"39658"</span>)]</span>
<span class="attribute">#[<span class="ident">rustc_deprecated</span>(<span class="ident">since</span> <span class="op">=</span> <span class="string">"1.26.0"</span>, <span class="ident">reason</span> <span class="op">=</span> <span class="string">"use inherent methods instead"</span>)]</span>
<span class="kw">fn</span> <span class="ident">is_ascii_punctuation</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> { <span class="macro">unimplemented</span><span class="macro">!</span>(); }
<span class="doccomment">/// Checks if the value is an ASCII graphic character:</span>
<span class="doccomment">/// U+0021 '!' ... U+007E '~'.</span>
<span class="doccomment">/// For strings, true if all characters in the string are</span>
<span class="doccomment">/// ASCII graphic characters.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Note</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This method will be deprecated in favor of the identically-named</span>
<span class="doccomment">/// inherent methods on `u8`, `char`, `[u8]` and `str`.</span>
<span class="attribute">#[<span class="ident">unstable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"ascii_ctype"</span>, <span class="ident">issue</span> <span class="op">=</span> <span class="string">"39658"</span>)]</span>
<span class="attribute">#[<span class="ident">rustc_deprecated</span>(<span class="ident">since</span> <span class="op">=</span> <span class="string">"1.26.0"</span>, <span class="ident">reason</span> <span class="op">=</span> <span class="string">"use inherent methods instead"</span>)]</span>
<span class="kw">fn</span> <span class="ident">is_ascii_graphic</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> { <span class="macro">unimplemented</span><span class="macro">!</span>(); }
<span class="doccomment">/// Checks if the value is an ASCII whitespace character:</span>
<span class="doccomment">/// U+0020 SPACE, U+0009 HORIZONTAL TAB, U+000A LINE FEED,</span>
<span class="doccomment">/// U+000C FORM FEED, or U+000D CARRIAGE RETURN.</span>
<span class="doccomment">/// For strings, true if all characters in the string are</span>
<span class="doccomment">/// ASCII whitespace.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Rust uses the WhatWG Infra Standard's [definition of ASCII</span>
<span class="doccomment">/// whitespace][infra-aw]. There are several other definitions in</span>
<span class="doccomment">/// wide use. For instance, [the POSIX locale][pct] includes</span>
<span class="doccomment">/// U+000B VERTICAL TAB as well as all the above characters,</span>
<span class="doccomment">/// but—from the very same specification—[the default rule for</span>
<span class="doccomment">/// "field splitting" in the Bourne shell][bfs] considers *only*</span>
<span class="doccomment">/// SPACE, HORIZONTAL TAB, and LINE FEED as whitespace.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// If you are writing a program that will process an existing</span>
<span class="doccomment">/// file format, check what that format's definition of whitespace is</span>
<span class="doccomment">/// before using this function.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// [infra-aw]: https://infra.spec.whatwg.org/#ascii-whitespace</span>
<span class="doccomment">/// [pct]: http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap07.html#tag_07_03_01</span>
<span class="doccomment">/// [bfs]: http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18_06_05</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Note</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This method will be deprecated in favor of the identically-named</span>
<span class="doccomment">/// inherent methods on `u8`, `char`, `[u8]` and `str`.</span>
<span class="attribute">#[<span class="ident">unstable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"ascii_ctype"</span>, <span class="ident">issue</span> <span class="op">=</span> <span class="string">"39658"</span>)]</span>
<span class="attribute">#[<span class="ident">rustc_deprecated</span>(<span class="ident">since</span> <span class="op">=</span> <span class="string">"1.26.0"</span>, <span class="ident">reason</span> <span class="op">=</span> <span class="string">"use inherent methods instead"</span>)]</span>
<span class="kw">fn</span> <span class="ident">is_ascii_whitespace</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> { <span class="macro">unimplemented</span><span class="macro">!</span>(); }
<span class="doccomment">/// Checks if the value is an ASCII control character:</span>
<span class="doccomment">/// U+0000 NUL ... U+001F UNIT SEPARATOR, or U+007F DELETE.</span>
<span class="doccomment">/// Note that most ASCII whitespace characters are control</span>
<span class="doccomment">/// characters, but SPACE is not.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Note</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This method will be deprecated in favor of the identically-named</span>
<span class="doccomment">/// inherent methods on `u8`, `char`, `[u8]` and `str`.</span>
<span class="attribute">#[<span class="ident">unstable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"ascii_ctype"</span>, <span class="ident">issue</span> <span class="op">=</span> <span class="string">"39658"</span>)]</span>
<span class="attribute">#[<span class="ident">rustc_deprecated</span>(<span class="ident">since</span> <span class="op">=</span> <span class="string">"1.26.0"</span>, <span class="ident">reason</span> <span class="op">=</span> <span class="string">"use inherent methods instead"</span>)]</span>
<span class="kw">fn</span> <span class="ident">is_ascii_control</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> { <span class="macro">unimplemented</span><span class="macro">!</span>(); }
}
<span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">delegating_ascii_methods</span> {
() <span class="op">=></span> {
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">is_ascii</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> { <span class="self">self</span>.<span class="ident">is_ascii</span>() }
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">to_ascii_uppercase</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="self">Self</span>::<span class="ident">Owned</span> { <span class="self">self</span>.<span class="ident">to_ascii_uppercase</span>() }
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">to_ascii_lowercase</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="self">Self</span>::<span class="ident">Owned</span> { <span class="self">self</span>.<span class="ident">to_ascii_lowercase</span>() }
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">eq_ignore_ascii_case</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">o</span>: <span class="kw-2">&</span><span class="self">Self</span>) <span class="op">-></span> <span class="ident">bool</span> { <span class="self">self</span>.<span class="ident">eq_ignore_ascii_case</span>(<span class="ident">o</span>) }
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">make_ascii_uppercase</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) { <span class="self">self</span>.<span class="ident">make_ascii_uppercase</span>(); }
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">make_ascii_lowercase</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) { <span class="self">self</span>.<span class="ident">make_ascii_lowercase</span>(); }
}
}
<span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">delegating_ascii_ctype_methods</span> {
() <span class="op">=></span> {
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">is_ascii_alphabetic</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> { <span class="self">self</span>.<span class="ident">is_ascii_alphabetic</span>() }
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">is_ascii_uppercase</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> { <span class="self">self</span>.<span class="ident">is_ascii_uppercase</span>() }
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">is_ascii_lowercase</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> { <span class="self">self</span>.<span class="ident">is_ascii_lowercase</span>() }
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">is_ascii_alphanumeric</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> { <span class="self">self</span>.<span class="ident">is_ascii_alphanumeric</span>() }
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">is_ascii_digit</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> { <span class="self">self</span>.<span class="ident">is_ascii_digit</span>() }
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">is_ascii_hexdigit</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> { <span class="self">self</span>.<span class="ident">is_ascii_hexdigit</span>() }
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">is_ascii_punctuation</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> { <span class="self">self</span>.<span class="ident">is_ascii_punctuation</span>() }
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">is_ascii_graphic</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> { <span class="self">self</span>.<span class="ident">is_ascii_graphic</span>() }
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">is_ascii_whitespace</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> { <span class="self">self</span>.<span class="ident">is_ascii_whitespace</span>() }
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">is_ascii_control</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> { <span class="self">self</span>.<span class="ident">is_ascii_control</span>() }
}
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="attribute">#[<span class="ident">allow</span>(<span class="ident">deprecated</span>)]</span>
<span class="kw">impl</span> <span class="ident">AsciiExt</span> <span class="kw">for</span> <span class="ident">u8</span> {
<span class="kw">type</span> <span class="ident">Owned</span> <span class="op">=</span> <span class="ident">u8</span>;
<span class="macro">delegating_ascii_methods</span><span class="macro">!</span>();
<span class="macro">delegating_ascii_ctype_methods</span><span class="macro">!</span>();
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="attribute">#[<span class="ident">allow</span>(<span class="ident">deprecated</span>)]</span>
<span class="kw">impl</span> <span class="ident">AsciiExt</span> <span class="kw">for</span> <span class="ident">char</span> {
<span class="kw">type</span> <span class="ident">Owned</span> <span class="op">=</span> <span class="ident">char</span>;
<span class="macro">delegating_ascii_methods</span><span class="macro">!</span>();
<span class="macro">delegating_ascii_ctype_methods</span><span class="macro">!</span>();
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="attribute">#[<span class="ident">allow</span>(<span class="ident">deprecated</span>)]</span>
<span class="kw">impl</span> <span class="ident">AsciiExt</span> <span class="kw">for</span> [<span class="ident">u8</span>] {
<span class="kw">type</span> <span class="ident">Owned</span> <span class="op">=</span> <span class="ident">Vec</span><span class="op"><</span><span class="ident">u8</span><span class="op">></span>;
<span class="macro">delegating_ascii_methods</span><span class="macro">!</span>();
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">is_ascii_alphabetic</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> {
<span class="self">self</span>.<span class="ident">iter</span>().<span class="ident">all</span>(<span class="op">|</span><span class="ident">b</span><span class="op">|</span> <span class="ident">b</span>.<span class="ident">is_ascii_alphabetic</span>())
}
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">is_ascii_uppercase</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> {
<span class="self">self</span>.<span class="ident">iter</span>().<span class="ident">all</span>(<span class="op">|</span><span class="ident">b</span><span class="op">|</span> <span class="ident">b</span>.<span class="ident">is_ascii_uppercase</span>())
}
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">is_ascii_lowercase</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> {
<span class="self">self</span>.<span class="ident">iter</span>().<span class="ident">all</span>(<span class="op">|</span><span class="ident">b</span><span class="op">|</span> <span class="ident">b</span>.<span class="ident">is_ascii_lowercase</span>())
}
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">is_ascii_alphanumeric</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> {
<span class="self">self</span>.<span class="ident">iter</span>().<span class="ident">all</span>(<span class="op">|</span><span class="ident">b</span><span class="op">|</span> <span class="ident">b</span>.<span class="ident">is_ascii_alphanumeric</span>())
}
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">is_ascii_digit</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> {
<span class="self">self</span>.<span class="ident">iter</span>().<span class="ident">all</span>(<span class="op">|</span><span class="ident">b</span><span class="op">|</span> <span class="ident">b</span>.<span class="ident">is_ascii_digit</span>())
}
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">is_ascii_hexdigit</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> {
<span class="self">self</span>.<span class="ident">iter</span>().<span class="ident">all</span>(<span class="op">|</span><span class="ident">b</span><span class="op">|</span> <span class="ident">b</span>.<span class="ident">is_ascii_hexdigit</span>())
}
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">is_ascii_punctuation</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> {
<span class="self">self</span>.<span class="ident">iter</span>().<span class="ident">all</span>(<span class="op">|</span><span class="ident">b</span><span class="op">|</span> <span class="ident">b</span>.<span class="ident">is_ascii_punctuation</span>())
}
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">is_ascii_graphic</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> {
<span class="self">self</span>.<span class="ident">iter</span>().<span class="ident">all</span>(<span class="op">|</span><span class="ident">b</span><span class="op">|</span> <span class="ident">b</span>.<span class="ident">is_ascii_graphic</span>())
}
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">is_ascii_whitespace</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> {
<span class="self">self</span>.<span class="ident">iter</span>().<span class="ident">all</span>(<span class="op">|</span><span class="ident">b</span><span class="op">|</span> <span class="ident">b</span>.<span class="ident">is_ascii_whitespace</span>())
}
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">is_ascii_control</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> {
<span class="self">self</span>.<span class="ident">iter</span>().<span class="ident">all</span>(<span class="op">|</span><span class="ident">b</span><span class="op">|</span> <span class="ident">b</span>.<span class="ident">is_ascii_control</span>())
}
}
<span class="attribute">#[<span class="ident">stable</span>(<span class="ident">feature</span> <span class="op">=</span> <span class="string">"rust1"</span>, <span class="ident">since</span> <span class="op">=</span> <span class="string">"1.0.0"</span>)]</span>
<span class="attribute">#[<span class="ident">allow</span>(<span class="ident">deprecated</span>)]</span>
<span class="kw">impl</span> <span class="ident">AsciiExt</span> <span class="kw">for</span> <span class="ident">str</span> {
<span class="kw">type</span> <span class="ident">Owned</span> <span class="op">=</span> <span class="ident">String</span>;
<span class="macro">delegating_ascii_methods</span><span class="macro">!</span>();
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">is_ascii_alphabetic</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> {
<span class="self">self</span>.<span class="ident">bytes</span>().<span class="ident">all</span>(<span class="op">|</span><span class="ident">b</span><span class="op">|</span> <span class="ident">b</span>.<span class="ident">is_ascii_alphabetic</span>())
}
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">is_ascii_uppercase</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> {
<span class="self">self</span>.<span class="ident">bytes</span>().<span class="ident">all</span>(<span class="op">|</span><span class="ident">b</span><span class="op">|</span> <span class="ident">b</span>.<span class="ident">is_ascii_uppercase</span>())
}
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">is_ascii_lowercase</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> {
<span class="self">self</span>.<span class="ident">bytes</span>().<span class="ident">all</span>(<span class="op">|</span><span class="ident">b</span><span class="op">|</span> <span class="ident">b</span>.<span class="ident">is_ascii_lowercase</span>())
}
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">is_ascii_alphanumeric</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> {
<span class="self">self</span>.<span class="ident">bytes</span>().<span class="ident">all</span>(<span class="op">|</span><span class="ident">b</span><span class="op">|</span> <span class="ident">b</span>.<span class="ident">is_ascii_alphanumeric</span>())
}
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">is_ascii_digit</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> {
<span class="self">self</span>.<span class="ident">bytes</span>().<span class="ident">all</span>(<span class="op">|</span><span class="ident">b</span><span class="op">|</span> <span class="ident">b</span>.<span class="ident">is_ascii_digit</span>())
}
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">is_ascii_hexdigit</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> {
<span class="self">self</span>.<span class="ident">bytes</span>().<span class="ident">all</span>(<span class="op">|</span><span class="ident">b</span><span class="op">|</span> <span class="ident">b</span>.<span class="ident">is_ascii_hexdigit</span>())
}
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">is_ascii_punctuation</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> {
<span class="self">self</span>.<span class="ident">bytes</span>().<span class="ident">all</span>(<span class="op">|</span><span class="ident">b</span><span class="op">|</span> <span class="ident">b</span>.<span class="ident">is_ascii_punctuation</span>())
}
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">is_ascii_graphic</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> {
<span class="self">self</span>.<span class="ident">bytes</span>().<span class="ident">all</span>(<span class="op">|</span><span class="ident">b</span><span class="op">|</span> <span class="ident">b</span>.<span class="ident">is_ascii_graphic</span>())
}
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">is_ascii_whitespace</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> {
<span class="self">self</span>.<span class="ident">bytes</span>().<span class="ident">all</span>(<span class="op">|</span><span class="ident">b</span><span class="op">|</span> <span class="ident">b</span>.<span class="ident">is_ascii_whitespace</span>())
}
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">is_ascii_control</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> {
<span class="self">self</span>.<span class="ident">bytes</span>().<span class="ident">all</span>(<span class="op">|</span><span class="ident">b</span><span class="op">|</span> <span class="ident">b</span>.<span class="ident">is_ascii_control</span>())
}
}
</pre>
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