| <!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="API documentation for the Rust `OpensslStringRef` struct in crate `openssl`."><meta name="keywords" content="rust, rustlang, rust-lang, OpensslStringRef"><title>OpensslStringRef in openssl::string - Rust</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 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class="sidebar-menu-toggle">☰</button><a class="sidebar-logo" href="../../openssl/index.html"><div class="logo-container"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></div></a><h2></h2></nav><nav class="sidebar"><a class="sidebar-logo" href="../../openssl/index.html"><div class="logo-container"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></div></a><h2 class="location"><a href="#">OpensslStringRef</a></h2><div class="sidebar-elems"><section><h3><a href="#deref-methods-str">Methods from Deref<Target=str></a></h3><ul class="block"><li><a href="#method.as_bytes">as_bytes</a></li><li><a href="#method.as_ptr">as_ptr</a></li><li><a href="#method.bytes">bytes</a></li><li><a href="#method.ceil_char_boundary">ceil_char_boundary</a></li><li><a href="#method.char_indices">char_indices</a></li><li><a href="#method.chars">chars</a></li><li><a href="#method.contains">contains</a></li><li><a href="#method.encode_utf16">encode_utf16</a></li><li><a href="#method.ends_with">ends_with</a></li><li><a href="#method.eq_ignore_ascii_case">eq_ignore_ascii_case</a></li><li><a href="#method.escape_debug">escape_debug</a></li><li><a href="#method.escape_default">escape_default</a></li><li><a href="#method.escape_unicode">escape_unicode</a></li><li><a href="#method.find">find</a></li><li><a href="#method.floor_char_boundary">floor_char_boundary</a></li><li><a href="#method.get">get</a></li><li><a href="#method.get_unchecked">get_unchecked</a></li><li><a href="#method.is_ascii">is_ascii</a></li><li><a href="#method.is_char_boundary">is_char_boundary</a></li><li><a href="#method.is_empty">is_empty</a></li><li><a href="#method.len">len</a></li><li><a href="#method.lines">lines</a></li><li><a href="#method.lines_any">lines_any</a></li><li><a href="#method.match_indices">match_indices</a></li><li><a href="#method.matches">matches</a></li><li><a href="#method.parse">parse</a></li><li><a href="#method.repeat">repeat</a></li><li><a href="#method.replace">replace</a></li><li><a href="#method.replacen">replacen</a></li><li><a href="#method.rfind">rfind</a></li><li><a href="#method.rmatch_indices">rmatch_indices</a></li><li><a href="#method.rmatches">rmatches</a></li><li><a href="#method.rsplit">rsplit</a></li><li><a href="#method.rsplit_once">rsplit_once</a></li><li><a href="#method.rsplit_terminator">rsplit_terminator</a></li><li><a href="#method.rsplitn">rsplitn</a></li><li><a href="#method.slice_unchecked">slice_unchecked</a></li><li><a href="#method.split">split</a></li><li><a href="#method.split_ascii_whitespace">split_ascii_whitespace</a></li><li><a href="#method.split_at">split_at</a></li><li><a href="#method.split_inclusive">split_inclusive</a></li><li><a href="#method.split_once">split_once</a></li><li><a href="#method.split_terminator">split_terminator</a></li><li><a href="#method.split_whitespace">split_whitespace</a></li><li><a href="#method.splitn">splitn</a></li><li><a href="#method.starts_with">starts_with</a></li><li><a href="#method.strip_prefix">strip_prefix</a></li><li><a href="#method.strip_suffix">strip_suffix</a></li><li><a href="#method.to_ascii_lowercase">to_ascii_lowercase</a></li><li><a href="#method.to_ascii_uppercase">to_ascii_uppercase</a></li><li><a href="#method.to_lowercase">to_lowercase</a></li><li><a href="#method.to_uppercase">to_uppercase</a></li><li><a href="#method.trim">trim</a></li><li><a href="#method.trim_end">trim_end</a></li><li><a href="#method.trim_end_matches">trim_end_matches</a></li><li><a href="#method.trim_left">trim_left</a></li><li><a href="#method.trim_left_matches">trim_left_matches</a></li><li><a href="#method.trim_matches">trim_matches</a></li><li><a href="#method.trim_right">trim_right</a></li><li><a href="#method.trim_right_matches">trim_right_matches</a></li><li><a href="#method.trim_start">trim_start</a></li><li><a href="#method.trim_start_matches">trim_start_matches</a></li></ul><h3><a href="#trait-implementations">Trait Implementations</a></h3><ul class="block"><li><a href="#impl-AsRef%3C%5Bu8%5D%3E-for-OpensslStringRef">AsRef<[u8]></a></li><li><a href="#impl-AsRef%3COpensslStringRef%3E-for-OpensslString">AsRef<OpensslStringRef></a></li><li><a href="#impl-AsRef%3Cstr%3E-for-OpensslStringRef">AsRef<str></a></li><li><a href="#impl-Borrow%3COpensslStringRef%3E-for-OpensslString">Borrow<OpensslStringRef></a></li><li><a href="#impl-Debug-for-OpensslStringRef">Debug</a></li><li><a href="#impl-Deref-for-OpensslStringRef">Deref</a></li><li><a href="#impl-Display-for-OpensslStringRef">Display</a></li><li><a href="#impl-ForeignTypeRef-for-OpensslStringRef">ForeignTypeRef</a></li><li><a href="#impl-Send-for-OpensslStringRef">Send</a></li><li><a href="#impl-Sync-for-OpensslStringRef">Sync</a></li></ul><h3><a href="#synthetic-implementations">Auto Trait Implementations</a></h3><ul class="block"><li><a href="#impl-RefUnwindSafe-for-OpensslStringRef">!RefUnwindSafe</a></li><li><a href="#impl-Unpin-for-OpensslStringRef">Unpin</a></li><li><a href="#impl-UnwindSafe-for-OpensslStringRef">UnwindSafe</a></li></ul><h3><a href="#blanket-implementations">Blanket Implementations</a></h3><ul class="block"><li><a href="#impl-Any-for-OpensslStringRef">Any</a></li><li><a href="#impl-Borrow%3CT%3E-for-OpensslStringRef">Borrow<T></a></li><li><a href="#impl-BorrowMut%3CT%3E-for-OpensslStringRef">BorrowMut<T></a></li><li><a href="#impl-From%3CT%3E-for-OpensslStringRef">From<T></a></li><li><a href="#impl-Into%3CU%3E-for-OpensslStringRef">Into<U></a></li><li><a href="#impl-ToString-for-OpensslStringRef">ToString</a></li><li><a href="#impl-TryFrom%3CU%3E-for-OpensslStringRef">TryFrom<U></a></li><li><a href="#impl-TryInto%3CU%3E-for-OpensslStringRef">TryInto<U></a></li></ul></section><h2><a href="index.html">In openssl::string</a></h2></div></nav><main><div class="width-limiter"><nav class="sub"><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="main-heading"><h1 class="fqn">Struct <a href="../index.html">openssl</a>::<wbr><a href="index.html">string</a>::<wbr><a class="struct" href="#">OpensslStringRef</a><button id="copy-path" onclick="copy_path(this)" title="Copy item path to clipboard"><img src="../../clipboard.svg" width="19" height="18" alt="Copy item path"></button></h1><span class="out-of-band"><a class="srclink" href="../../src/openssl/string.rs.html#11-17">source</a> · <a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">−</span>]</a></span></div><div class="item-decl"><pre class="rust struct"><code>pub struct OpensslStringRef(_);</code></pre></div><h2 id="deref-methods-str" class="small-section-header"><span>Methods from <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/deref/trait.Deref.html" title="trait core::ops::deref::Deref">Deref</a><Target = <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>></span><a href="#deref-methods-str" class="anchor"></a></h2><div id="deref-methods-str-1"><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.len" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#159">source</a></span><h4 class="code-header">pub fn <a href="#method.len" class="fnname">len</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a></h4></section></summary><div class="docblock"><p>Returns the length of <code>self</code>.</p> |
| <p>This length is in bytes, not <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>s or graphemes. In other words, |
| it might not be what a human considers the length of the string.</p> |
| <h5 id="examples"><a href="#examples">Examples</a></h5> |
| <p>Basic usage:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>len = <span class="string">"foo"</span>.len(); |
| <span class="macro">assert_eq!</span>(<span class="number">3</span>, len); |
| |
| <span class="macro">assert_eq!</span>(<span class="string">"ƒoo"</span>.len(), <span class="number">4</span>); <span class="comment">// fancy f! |
| </span><span class="macro">assert_eq!</span>(<span class="string">"ƒoo"</span>.chars().count(), <span class="number">3</span>);</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.is_empty" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#180">source</a></span><h4 class="code-header">pub fn <a href="#method.is_empty" class="fnname">is_empty</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></h4></section></summary><div class="docblock"><p>Returns <code>true</code> if <code>self</code> has a length of zero bytes.</p> |
| <h5 id="examples-1"><a href="#examples-1">Examples</a></h5> |
| <p>Basic usage:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>s = <span class="string">""</span>; |
| <span class="macro">assert!</span>(s.is_empty()); |
| |
| <span class="kw">let </span>s = <span class="string">"not empty"</span>; |
| <span class="macro">assert!</span>(!s.is_empty());</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.is_char_boundary" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.9.0">1.9.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#211">source</a></span><h4 class="code-header">pub fn <a href="#method.is_char_boundary" class="fnname">is_char_boundary</a>(&self, index: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></h4></section></summary><div class="docblock"><p>Checks that <code>index</code>-th byte is the first byte in a UTF-8 code point |
| sequence or the end of the string.</p> |
| <p>The start and end of the string (when <code>index == self.len()</code>) are |
| considered to be boundaries.</p> |
| <p>Returns <code>false</code> if <code>index</code> is greater than <code>self.len()</code>.</p> |
| <h5 id="examples-2"><a href="#examples-2">Examples</a></h5> |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>s = <span class="string">"Löwe 老虎 Léopard"</span>; |
| <span class="macro">assert!</span>(s.is_char_boundary(<span class="number">0</span>)); |
| <span class="comment">// start of `老` |
| </span><span class="macro">assert!</span>(s.is_char_boundary(<span class="number">6</span>)); |
| <span class="macro">assert!</span>(s.is_char_boundary(s.len())); |
| |
| <span class="comment">// second byte of `ö` |
| </span><span class="macro">assert!</span>(!s.is_char_boundary(<span class="number">2</span>)); |
| |
| <span class="comment">// third byte of `老` |
| </span><span class="macro">assert!</span>(!s.is_char_boundary(<span class="number">8</span>));</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.floor_char_boundary" class="method has-srclink"><a class="srclink rightside" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#258">source</a><h4 class="code-header">pub fn <a href="#method.floor_char_boundary" class="fnname">floor_char_boundary</a>(&self, index: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a></h4></section><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>round_char_boundary</code>)</span></div></span></summary><div class="docblock"><p>Finds the closest <code>x</code> not exceeding <code>index</code> where <code>is_char_boundary(x)</code> is <code>true</code>.</p> |
| <p>This method can help you truncate a string so that it’s still valid UTF-8, but doesn’t |
| exceed a given number of bytes. Note that this is done purely at the character level |
| and can still visually split graphemes, even though the underlying characters aren’t |
| split. For example, the emoji 🧑🔬 (scientist) could be split so that the string only |
| includes 🧑 (person) instead.</p> |
| <h5 id="examples-3"><a href="#examples-3">Examples</a></h5> |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="attribute">#![feature(round_char_boundary)] |
| </span><span class="kw">let </span>s = <span class="string">"❤️🧡💛💚💙💜"</span>; |
| <span class="macro">assert_eq!</span>(s.len(), <span class="number">26</span>); |
| <span class="macro">assert!</span>(!s.is_char_boundary(<span class="number">13</span>)); |
| |
| <span class="kw">let </span>closest = s.floor_char_boundary(<span class="number">13</span>); |
| <span class="macro">assert_eq!</span>(closest, <span class="number">10</span>); |
| <span class="macro">assert_eq!</span>(<span class="kw-2">&</span>s[..closest], <span class="string">"❤️🧡"</span>);</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.ceil_char_boundary" class="method has-srclink"><a class="srclink rightside" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#297">source</a><h4 class="code-header">pub fn <a href="#method.ceil_char_boundary" class="fnname">ceil_char_boundary</a>(&self, index: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a></h4></section><span class="item-info"><div class="stab unstable"><span class="emoji">🔬</span><span>This is a nightly-only experimental API. (<code>round_char_boundary</code>)</span></div></span></summary><div class="docblock"><p>Finds the closest <code>x</code> not below <code>index</code> where <code>is_char_boundary(x)</code> is <code>true</code>.</p> |
| <p>This method is the natural complement to <a href="https://doc.rust-lang.org/nightly/std/primitive.str.html#method.floor_char_boundary"><code>floor_char_boundary</code></a>. See that method |
| for more details.</p> |
| <h5 id="panics"><a href="#panics">Panics</a></h5> |
| <p>Panics if <code>index > self.len()</code>.</p> |
| <h5 id="examples-4"><a href="#examples-4">Examples</a></h5> |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="attribute">#![feature(round_char_boundary)] |
| </span><span class="kw">let </span>s = <span class="string">"❤️🧡💛💚💙💜"</span>; |
| <span class="macro">assert_eq!</span>(s.len(), <span class="number">26</span>); |
| <span class="macro">assert!</span>(!s.is_char_boundary(<span class="number">13</span>)); |
| |
| <span class="kw">let </span>closest = s.ceil_char_boundary(<span class="number">13</span>); |
| <span class="macro">assert_eq!</span>(closest, <span class="number">14</span>); |
| <span class="macro">assert_eq!</span>(<span class="kw-2">&</span>s[..closest], <span class="string">"❤️🧡💛"</span>);</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.as_bytes" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#325">source</a></span><h4 class="code-header">pub fn <a href="#method.as_bytes" class="fnname">as_bytes</a>(&self) -> &[<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a>]<span class="notable-traits"><span class="notable-traits-tooltip">ⓘ<span class="notable-traits-tooltiptext"><span class="docblock"><span class="notable">Notable traits for &[<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a>]</span><code class="content"><span class="where fmt-newline">impl <a class="trait" href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html" title="trait std::io::Read">Read</a> for &[<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a>]</span><span class="where fmt-newline">impl <a class="trait" href="https://doc.rust-lang.org/nightly/std/io/trait.Write.html" title="trait std::io::Write">Write</a> for &mut [<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a>]</span></code></span></span></span></span></h4></section></summary><div class="docblock"><p>Converts a string slice to a byte slice. To convert the byte slice back |
| into a string slice, use the <a href="https://doc.rust-lang.org/nightly/core/str/converts/fn.from_utf8.html" title="from_utf8"><code>from_utf8</code></a> function.</p> |
| <h5 id="examples-5"><a href="#examples-5">Examples</a></h5> |
| <p>Basic usage:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>bytes = <span class="string">"bors"</span>.as_bytes(); |
| <span class="macro">assert_eq!</span>(<span class="string">b"bors"</span>, bytes);</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.as_ptr" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#400">source</a></span><h4 class="code-header">pub fn <a href="#method.as_ptr" class="fnname">as_ptr</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.pointer.html">*const </a><a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a></h4></section></summary><div class="docblock"><p>Converts a string slice to a raw pointer.</p> |
| <p>As string slices are a slice of bytes, the raw pointer points to a |
| <a href="https://doc.rust-lang.org/nightly/std/primitive.u8.html" title="u8"><code>u8</code></a>. This pointer will be pointing to the first byte of the string |
| slice.</p> |
| <p>The caller must ensure that the returned pointer is never written to. |
| If you need to mutate the contents of the string slice, use <a href="https://doc.rust-lang.org/nightly/std/primitive.str.html#method.as_mut_ptr"><code>as_mut_ptr</code></a>.</p> |
| <h5 id="examples-6"><a href="#examples-6">Examples</a></h5> |
| <p>Basic usage:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>s = <span class="string">"Hello"</span>; |
| <span class="kw">let </span>ptr = s.as_ptr();</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.get" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.20.0">1.20.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#441">source</a></span><h4 class="code-header">pub fn <a href="#method.get" class="fnname">get</a><I>(&self, i: I) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><&<I as <a class="trait" href="https://doc.rust-lang.org/nightly/core/slice/index/trait.SliceIndex.html" title="trait core::slice::index::SliceIndex">SliceIndex</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>>>::<a class="associatedtype" href="https://doc.rust-lang.org/nightly/core/slice/index/trait.SliceIndex.html#associatedtype.Output" title="type core::slice::index::SliceIndex::Output">Output</a>><span class="where fmt-newline">where<br> I: <a class="trait" href="https://doc.rust-lang.org/nightly/core/slice/index/trait.SliceIndex.html" title="trait core::slice::index::SliceIndex">SliceIndex</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>>,</span></h4></section></summary><div class="docblock"><p>Returns a subslice of <code>str</code>.</p> |
| <p>This is the non-panicking alternative to indexing the <code>str</code>. Returns |
| <a href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html#variant.None" title="None"><code>None</code></a> whenever equivalent indexing operation would panic.</p> |
| <h5 id="examples-7"><a href="#examples-7">Examples</a></h5> |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>v = String::from(<span class="string">"🗻∈🌏"</span>); |
| |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="string">"🗻"</span>), v.get(<span class="number">0</span>..<span class="number">4</span>)); |
| |
| <span class="comment">// indices not on UTF-8 sequence boundaries |
| </span><span class="macro">assert!</span>(v.get(<span class="number">1</span>..).is_none()); |
| <span class="macro">assert!</span>(v.get(..<span class="number">8</span>).is_none()); |
| |
| <span class="comment">// out of bounds |
| </span><span class="macro">assert!</span>(v.get(..<span class="number">42</span>).is_none());</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.get_unchecked" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.20.0">1.20.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#507">source</a></span><h4 class="code-header">pub unsafe fn <a href="#method.get_unchecked" class="fnname">get_unchecked</a><I>(&self, i: I) -> &<I as <a class="trait" href="https://doc.rust-lang.org/nightly/core/slice/index/trait.SliceIndex.html" title="trait core::slice::index::SliceIndex">SliceIndex</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>>>::<a class="associatedtype" href="https://doc.rust-lang.org/nightly/core/slice/index/trait.SliceIndex.html#associatedtype.Output" title="type core::slice::index::SliceIndex::Output">Output</a><span class="where fmt-newline">where<br> I: <a class="trait" href="https://doc.rust-lang.org/nightly/core/slice/index/trait.SliceIndex.html" title="trait core::slice::index::SliceIndex">SliceIndex</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>>,</span></h4></section></summary><div class="docblock"><p>Returns an unchecked subslice of <code>str</code>.</p> |
| <p>This is the unchecked alternative to indexing the <code>str</code>.</p> |
| <h5 id="safety"><a href="#safety">Safety</a></h5> |
| <p>Callers of this function are responsible that these preconditions are |
| satisfied:</p> |
| <ul> |
| <li>The starting index must not exceed the ending index;</li> |
| <li>Indexes must be within bounds of the original slice;</li> |
| <li>Indexes must lie on UTF-8 sequence boundaries.</li> |
| </ul> |
| <p>Failing that, the returned string slice may reference invalid memory or |
| violate the invariants communicated by the <code>str</code> type.</p> |
| <h5 id="examples-8"><a href="#examples-8">Examples</a></h5> |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>v = <span class="string">"🗻∈🌏"</span>; |
| <span class="kw">unsafe </span>{ |
| <span class="macro">assert_eq!</span>(<span class="string">"🗻"</span>, v.get_unchecked(<span class="number">0</span>..<span class="number">4</span>)); |
| <span class="macro">assert_eq!</span>(<span class="string">"∈"</span>, v.get_unchecked(<span class="number">4</span>..<span class="number">7</span>)); |
| <span class="macro">assert_eq!</span>(<span class="string">"🌏"</span>, v.get_unchecked(<span class="number">7</span>..<span class="number">11</span>)); |
| }</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.slice_unchecked" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#599">source</a></span><h4 class="code-header">pub unsafe fn <a href="#method.slice_unchecked" class="fnname">slice_unchecked</a>(&self, begin: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, end: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>) -> &<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a></h4></section><span class="item-info"><div class="stab deprecated"><span class="emoji">👎</span><span>Deprecated since 1.29.0: use <code>get_unchecked(begin..end)</code> instead</span></div></span></summary><div class="docblock"><p>Creates a string slice from another string slice, bypassing safety |
| checks.</p> |
| <p>This is generally not recommended, use with caution! For a safe |
| alternative see <a href="https://doc.rust-lang.org/nightly/std/primitive.str.html" title="str"><code>str</code></a> and <a href="https://doc.rust-lang.org/nightly/core/ops/index/trait.Index.html"><code>Index</code></a>.</p> |
| <p>This new slice goes from <code>begin</code> to <code>end</code>, including <code>begin</code> but |
| excluding <code>end</code>.</p> |
| <p>To get a mutable string slice instead, see the |
| <a href="https://doc.rust-lang.org/nightly/std/primitive.str.html#method.slice_mut_unchecked"><code>slice_mut_unchecked</code></a> method.</p> |
| <h5 id="safety-1"><a href="#safety-1">Safety</a></h5> |
| <p>Callers of this function are responsible that three preconditions are |
| satisfied:</p> |
| <ul> |
| <li><code>begin</code> must not exceed <code>end</code>.</li> |
| <li><code>begin</code> and <code>end</code> must be byte positions within the string slice.</li> |
| <li><code>begin</code> and <code>end</code> must lie on UTF-8 sequence boundaries.</li> |
| </ul> |
| <h5 id="examples-9"><a href="#examples-9">Examples</a></h5> |
| <p>Basic usage:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>s = <span class="string">"Löwe 老虎 Léopard"</span>; |
| |
| <span class="kw">unsafe </span>{ |
| <span class="macro">assert_eq!</span>(<span class="string">"Löwe 老虎 Léopard"</span>, s.slice_unchecked(<span class="number">0</span>, <span class="number">21</span>)); |
| } |
| |
| <span class="kw">let </span>s = <span class="string">"Hello, world!"</span>; |
| |
| <span class="kw">unsafe </span>{ |
| <span class="macro">assert_eq!</span>(<span class="string">"world"</span>, s.slice_unchecked(<span class="number">7</span>, <span class="number">12</span>)); |
| }</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.split_at" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.4.0">1.4.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#672">source</a></span><h4 class="code-header">pub fn <a href="#method.split_at" class="fnname">split_at</a>(&self, mid: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>) -> (&<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>, &<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>)</h4></section></summary><div class="docblock"><p>Divide one string slice into two at an index.</p> |
| <p>The argument, <code>mid</code>, should be a byte offset from the start of the |
| string. It must also be on the boundary of a UTF-8 code point.</p> |
| <p>The two slices returned go from the start of the string slice to <code>mid</code>, |
| and from <code>mid</code> to the end of the string slice.</p> |
| <p>To get mutable string slices instead, see the <a href="https://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_at_mut"><code>split_at_mut</code></a> |
| method.</p> |
| <h5 id="panics-1"><a href="#panics-1">Panics</a></h5> |
| <p>Panics if <code>mid</code> is not on a UTF-8 code point boundary, or if it is |
| past the end of the last code point of the string slice.</p> |
| <h5 id="examples-10"><a href="#examples-10">Examples</a></h5> |
| <p>Basic usage:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>s = <span class="string">"Per Martin-Löf"</span>; |
| |
| <span class="kw">let </span>(first, last) = s.split_at(<span class="number">3</span>); |
| |
| <span class="macro">assert_eq!</span>(<span class="string">"Per"</span>, first); |
| <span class="macro">assert_eq!</span>(<span class="string">" Martin-Löf"</span>, last);</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.chars" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#782">source</a></span><h4 class="code-header">pub fn <a href="#method.chars" class="fnname">chars</a>(&self) -> <a class="struct" href="https://doc.rust-lang.org/nightly/core/str/iter/struct.Chars.html" title="struct core::str::iter::Chars">Chars</a><'_></h4></section></summary><div class="docblock"><p>Returns an iterator over the <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>s of a string slice.</p> |
| <p>As a string slice consists of valid UTF-8, we can iterate through a |
| string slice by <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>. This method returns such an iterator.</p> |
| <p>It’s important to remember that <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a> represents a Unicode Scalar |
| Value, and might not match your idea of what a ‘character’ is. Iteration |
| over grapheme clusters may be what you actually want. This functionality |
| is not provided by Rust’s standard library, check crates.io instead.</p> |
| <h5 id="examples-11"><a href="#examples-11">Examples</a></h5> |
| <p>Basic usage:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>word = <span class="string">"goodbye"</span>; |
| |
| <span class="kw">let </span>count = word.chars().count(); |
| <span class="macro">assert_eq!</span>(<span class="number">7</span>, count); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>chars = word.chars(); |
| |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="string">'g'</span>), chars.next()); |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="string">'o'</span>), chars.next()); |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="string">'o'</span>), chars.next()); |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="string">'d'</span>), chars.next()); |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="string">'b'</span>), chars.next()); |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="string">'y'</span>), chars.next()); |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="string">'e'</span>), chars.next()); |
| |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, chars.next());</code></pre></div> |
| <p>Remember, <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>s might not match your intuition about characters:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>y = <span class="string">"y̆"</span>; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>chars = y.chars(); |
| |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="string">'y'</span>), chars.next()); <span class="comment">// not 'y̆' |
| </span><span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="string">'\u{0306}'</span>), chars.next()); |
| |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, chars.next());</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.char_indices" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#839">source</a></span><h4 class="code-header">pub fn <a href="#method.char_indices" class="fnname">char_indices</a>(&self) -> <a class="struct" href="https://doc.rust-lang.org/nightly/core/str/iter/struct.CharIndices.html" title="struct core::str::iter::CharIndices">CharIndices</a><'_></h4></section></summary><div class="docblock"><p>Returns an iterator over the <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>s of a string slice, and their |
| positions.</p> |
| <p>As a string slice consists of valid UTF-8, we can iterate through a |
| string slice by <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>. This method returns an iterator of both |
| these <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>s, as well as their byte positions.</p> |
| <p>The iterator yields tuples. The position is first, the <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a> is |
| second.</p> |
| <h5 id="examples-12"><a href="#examples-12">Examples</a></h5> |
| <p>Basic usage:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>word = <span class="string">"goodbye"</span>; |
| |
| <span class="kw">let </span>count = word.char_indices().count(); |
| <span class="macro">assert_eq!</span>(<span class="number">7</span>, count); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>char_indices = word.char_indices(); |
| |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>((<span class="number">0</span>, <span class="string">'g'</span>)), char_indices.next()); |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>((<span class="number">1</span>, <span class="string">'o'</span>)), char_indices.next()); |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>((<span class="number">2</span>, <span class="string">'o'</span>)), char_indices.next()); |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>((<span class="number">3</span>, <span class="string">'d'</span>)), char_indices.next()); |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>((<span class="number">4</span>, <span class="string">'b'</span>)), char_indices.next()); |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>((<span class="number">5</span>, <span class="string">'y'</span>)), char_indices.next()); |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>((<span class="number">6</span>, <span class="string">'e'</span>)), char_indices.next()); |
| |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, char_indices.next());</code></pre></div> |
| <p>Remember, <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>s might not match your intuition about characters:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>yes = <span class="string">"y̆es"</span>; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>char_indices = yes.char_indices(); |
| |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>((<span class="number">0</span>, <span class="string">'y'</span>)), char_indices.next()); <span class="comment">// not (0, 'y̆') |
| </span><span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>((<span class="number">1</span>, <span class="string">'\u{0306}'</span>)), char_indices.next()); |
| |
| <span class="comment">// note the 3 here - the last character took up two bytes |
| </span><span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>((<span class="number">3</span>, <span class="string">'e'</span>)), char_indices.next()); |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>((<span class="number">4</span>, <span class="string">'s'</span>)), char_indices.next()); |
| |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, char_indices.next());</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.bytes" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#864">source</a></span><h4 class="code-header">pub fn <a href="#method.bytes" class="fnname">bytes</a>(&self) -> <a class="struct" href="https://doc.rust-lang.org/nightly/core/str/iter/struct.Bytes.html" title="struct core::str::iter::Bytes">Bytes</a><'_></h4></section></summary><div class="docblock"><p>An iterator over the bytes of a string slice.</p> |
| <p>As a string slice consists of a sequence of bytes, we can iterate |
| through a string slice by byte. This method returns such an iterator.</p> |
| <h5 id="examples-13"><a href="#examples-13">Examples</a></h5> |
| <p>Basic usage:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span><span class="kw-2">mut </span>bytes = <span class="string">"bors"</span>.bytes(); |
| |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="string">b'b'</span>), bytes.next()); |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="string">b'o'</span>), bytes.next()); |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="string">b'r'</span>), bytes.next()); |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="string">b's'</span>), bytes.next()); |
| |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, bytes.next());</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.split_whitespace" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.1.0">1.1.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#910">source</a></span><h4 class="code-header">pub fn <a href="#method.split_whitespace" class="fnname">split_whitespace</a>(&self) -> <a class="struct" href="https://doc.rust-lang.org/nightly/core/str/iter/struct.SplitWhitespace.html" title="struct core::str::iter::SplitWhitespace">SplitWhitespace</a><'_></h4></section></summary><div class="docblock"><p>Splits a string slice by whitespace.</p> |
| <p>The iterator returned will return string slices that are sub-slices of |
| the original string slice, separated by any amount of whitespace.</p> |
| <p>‘Whitespace’ is defined according to the terms of the Unicode Derived |
| Core Property <code>White_Space</code>. If you only want to split on ASCII whitespace |
| instead, use <a href="https://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_ascii_whitespace"><code>split_ascii_whitespace</code></a>.</p> |
| <h5 id="examples-14"><a href="#examples-14">Examples</a></h5> |
| <p>Basic usage:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span><span class="kw-2">mut </span>iter = <span class="string">"A few words"</span>.split_whitespace(); |
| |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="string">"A"</span>), iter.next()); |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="string">"few"</span>), iter.next()); |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="string">"words"</span>), iter.next()); |
| |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, iter.next());</code></pre></div> |
| <p>All kinds of whitespace are considered:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span><span class="kw-2">mut </span>iter = <span class="string">" Mary had\ta\u{2009}little \n\t lamb"</span>.split_whitespace(); |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="string">"Mary"</span>), iter.next()); |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="string">"had"</span>), iter.next()); |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="string">"a"</span>), iter.next()); |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="string">"little"</span>), iter.next()); |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="string">"lamb"</span>), iter.next()); |
| |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, iter.next());</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.split_ascii_whitespace" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.34.0">1.34.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#953">source</a></span><h4 class="code-header">pub fn <a href="#method.split_ascii_whitespace" class="fnname">split_ascii_whitespace</a>(&self) -> <a class="struct" href="https://doc.rust-lang.org/nightly/core/str/iter/struct.SplitAsciiWhitespace.html" title="struct core::str::iter::SplitAsciiWhitespace">SplitAsciiWhitespace</a><'_></h4></section></summary><div class="docblock"><p>Splits a string slice by ASCII whitespace.</p> |
| <p>The iterator returned will return string slices that are sub-slices of |
| the original string slice, separated by any amount of ASCII whitespace.</p> |
| <p>To split by Unicode <code>Whitespace</code> instead, use <a href="https://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_whitespace"><code>split_whitespace</code></a>.</p> |
| <h5 id="examples-15"><a href="#examples-15">Examples</a></h5> |
| <p>Basic usage:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span><span class="kw-2">mut </span>iter = <span class="string">"A few words"</span>.split_ascii_whitespace(); |
| |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="string">"A"</span>), iter.next()); |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="string">"few"</span>), iter.next()); |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="string">"words"</span>), iter.next()); |
| |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, iter.next());</code></pre></div> |
| <p>All kinds of ASCII whitespace are considered:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span><span class="kw-2">mut </span>iter = <span class="string">" Mary had\ta little \n\t lamb"</span>.split_ascii_whitespace(); |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="string">"Mary"</span>), iter.next()); |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="string">"had"</span>), iter.next()); |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="string">"a"</span>), iter.next()); |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="string">"little"</span>), iter.next()); |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="string">"lamb"</span>), iter.next()); |
| |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, iter.next());</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.lines" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#999">source</a></span><h4 class="code-header">pub fn <a href="#method.lines" class="fnname">lines</a>(&self) -> <a class="struct" href="https://doc.rust-lang.org/nightly/core/str/iter/struct.Lines.html" title="struct core::str::iter::Lines">Lines</a><'_></h4></section></summary><div class="docblock"><p>An iterator over the lines of a string, as string slices.</p> |
| <p>Lines are ended with either a newline (<code>\n</code>) or a carriage return with |
| a line feed (<code>\r\n</code>).</p> |
| <p>The final line ending is optional. A string that ends with a final line |
| ending will return the same lines as an otherwise identical string |
| without a final line ending.</p> |
| <h5 id="examples-16"><a href="#examples-16">Examples</a></h5> |
| <p>Basic usage:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>text = <span class="string">"foo\r\nbar\n\nbaz\n"</span>; |
| <span class="kw">let </span><span class="kw-2">mut </span>lines = text.lines(); |
| |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="string">"foo"</span>), lines.next()); |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="string">"bar"</span>), lines.next()); |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="string">""</span>), lines.next()); |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="string">"baz"</span>), lines.next()); |
| |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, lines.next());</code></pre></div> |
| <p>The final line ending isn’t required:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>text = <span class="string">"foo\nbar\n\r\nbaz"</span>; |
| <span class="kw">let </span><span class="kw-2">mut </span>lines = text.lines(); |
| |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="string">"foo"</span>), lines.next()); |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="string">"bar"</span>), lines.next()); |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="string">""</span>), lines.next()); |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="string">"baz"</span>), lines.next()); |
| |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, lines.next());</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.lines_any" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#1008">source</a></span><h4 class="code-header">pub fn <a href="#method.lines_any" class="fnname">lines_any</a>(&self) -> <a class="struct" href="https://doc.rust-lang.org/nightly/core/str/iter/struct.LinesAny.html" title="struct core::str::iter::LinesAny">LinesAny</a><'_></h4></section><span class="item-info"><div class="stab deprecated"><span class="emoji">👎</span><span>Deprecated since 1.4.0: use lines() instead now</span></div></span></summary><div class="docblock"><p>An iterator over the lines of a string.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.encode_utf16" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.8.0">1.8.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#1029">source</a></span><h4 class="code-header">pub fn <a href="#method.encode_utf16" class="fnname">encode_utf16</a>(&self) -> <a class="struct" href="https://doc.rust-lang.org/nightly/core/str/iter/struct.EncodeUtf16.html" title="struct core::str::iter::EncodeUtf16">EncodeUtf16</a><'_></h4></section></summary><div class="docblock"><p>Returns an iterator of <code>u16</code> over the string encoded as UTF-16.</p> |
| <h5 id="examples-17"><a href="#examples-17">Examples</a></h5> |
| <p>Basic usage:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>text = <span class="string">"Zażółć gęślą jaźń"</span>; |
| |
| <span class="kw">let </span>utf8_len = text.len(); |
| <span class="kw">let </span>utf16_len = text.encode_utf16().count(); |
| |
| <span class="macro">assert!</span>(utf16_len <= utf8_len);</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.contains" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#1056">source</a></span><h4 class="code-header">pub fn <a href="#method.contains" class="fnname">contains</a><'a, P>(&'a self, pat: P) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a><span class="where fmt-newline">where<br> P: <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html" title="trait core::str::pattern::Pattern">Pattern</a><'a>,</span></h4></section></summary><div class="docblock"><p>Returns <code>true</code> if the given pattern matches a sub-slice of |
| this string slice.</p> |
| <p>Returns <code>false</code> if it does not.</p> |
| <p>The <a href="https://doc.rust-lang.org/nightly/core/str/pattern/index.html">pattern</a> can be a <code>&str</code>, <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>, a slice of <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>s, or a |
| function or closure that determines if a character matches.</p> |
| <h5 id="examples-18"><a href="#examples-18">Examples</a></h5> |
| <p>Basic usage:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>bananas = <span class="string">"bananas"</span>; |
| |
| <span class="macro">assert!</span>(bananas.contains(<span class="string">"nana"</span>)); |
| <span class="macro">assert!</span>(!bananas.contains(<span class="string">"apples"</span>));</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.starts_with" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#1082">source</a></span><h4 class="code-header">pub fn <a href="#method.starts_with" class="fnname">starts_with</a><'a, P>(&'a self, pat: P) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a><span class="where fmt-newline">where<br> P: <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html" title="trait core::str::pattern::Pattern">Pattern</a><'a>,</span></h4></section></summary><div class="docblock"><p>Returns <code>true</code> if the given pattern matches a prefix of this |
| string slice.</p> |
| <p>Returns <code>false</code> if it does not.</p> |
| <p>The <a href="https://doc.rust-lang.org/nightly/core/str/pattern/index.html">pattern</a> can be a <code>&str</code>, <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>, a slice of <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>s, or a |
| function or closure that determines if a character matches.</p> |
| <h5 id="examples-19"><a href="#examples-19">Examples</a></h5> |
| <p>Basic usage:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>bananas = <span class="string">"bananas"</span>; |
| |
| <span class="macro">assert!</span>(bananas.starts_with(<span class="string">"bana"</span>)); |
| <span class="macro">assert!</span>(!bananas.starts_with(<span class="string">"nana"</span>));</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.ends_with" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#1108-1110">source</a></span><h4 class="code-header">pub fn <a href="#method.ends_with" class="fnname">ends_with</a><'a, P>(&'a self, pat: P) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a><span class="where fmt-newline">where<br> P: <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html" title="trait core::str::pattern::Pattern">Pattern</a><'a>,<br> <P as <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html" title="trait core::str::pattern::Pattern">Pattern</a><'a>>::<a class="associatedtype" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html#associatedtype.Searcher" title="type core::str::pattern::Pattern::Searcher">Searcher</a>: <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.ReverseSearcher.html" title="trait core::str::pattern::ReverseSearcher">ReverseSearcher</a><'a>,</span></h4></section></summary><div class="docblock"><p>Returns <code>true</code> if the given pattern matches a suffix of this |
| string slice.</p> |
| <p>Returns <code>false</code> if it does not.</p> |
| <p>The <a href="https://doc.rust-lang.org/nightly/core/str/pattern/index.html">pattern</a> can be a <code>&str</code>, <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>, a slice of <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>s, or a |
| function or closure that determines if a character matches.</p> |
| <h5 id="examples-20"><a href="#examples-20">Examples</a></h5> |
| <p>Basic usage:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>bananas = <span class="string">"bananas"</span>; |
| |
| <span class="macro">assert!</span>(bananas.ends_with(<span class="string">"anas"</span>)); |
| <span class="macro">assert!</span>(!bananas.ends_with(<span class="string">"nana"</span>));</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.find" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#1159">source</a></span><h4 class="code-header">pub fn <a href="#method.find" class="fnname">find</a><'a, P>(&'a self, pat: P) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>><span class="where fmt-newline">where<br> P: <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html" title="trait core::str::pattern::Pattern">Pattern</a><'a>,</span></h4></section></summary><div class="docblock"><p>Returns the byte index of the first character of this string slice that |
| matches the pattern.</p> |
| <p>Returns <a href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html#variant.None" title="None"><code>None</code></a> if the pattern doesn’t match.</p> |
| <p>The <a href="https://doc.rust-lang.org/nightly/core/str/pattern/index.html">pattern</a> can be a <code>&str</code>, <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>, a slice of <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>s, or a |
| function or closure that determines if a character matches.</p> |
| <h5 id="examples-21"><a href="#examples-21">Examples</a></h5> |
| <p>Simple patterns:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>s = <span class="string">"Löwe 老虎 Léopard Gepardi"</span>; |
| |
| <span class="macro">assert_eq!</span>(s.find(<span class="string">'L'</span>), <span class="prelude-val">Some</span>(<span class="number">0</span>)); |
| <span class="macro">assert_eq!</span>(s.find(<span class="string">'é'</span>), <span class="prelude-val">Some</span>(<span class="number">14</span>)); |
| <span class="macro">assert_eq!</span>(s.find(<span class="string">"pard"</span>), <span class="prelude-val">Some</span>(<span class="number">17</span>));</code></pre></div> |
| <p>More complex patterns using point-free style and closures:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>s = <span class="string">"Löwe 老虎 Léopard"</span>; |
| |
| <span class="macro">assert_eq!</span>(s.find(char::is_whitespace), <span class="prelude-val">Some</span>(<span class="number">5</span>)); |
| <span class="macro">assert_eq!</span>(s.find(char::is_lowercase), <span class="prelude-val">Some</span>(<span class="number">1</span>)); |
| <span class="macro">assert_eq!</span>(s.find(|c: char| c.is_whitespace() || c.is_lowercase()), <span class="prelude-val">Some</span>(<span class="number">1</span>)); |
| <span class="macro">assert_eq!</span>(s.find(|c: char| (c < <span class="string">'o'</span>) && (c > <span class="string">'a'</span>)), <span class="prelude-val">Some</span>(<span class="number">4</span>));</code></pre></div> |
| <p>Not finding the pattern:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>s = <span class="string">"Löwe 老虎 Léopard"</span>; |
| <span class="kw">let </span>x: <span class="kw-2">&</span>[<span class="kw">_</span>] = <span class="kw-2">&</span>[<span class="string">'1'</span>, <span class="string">'2'</span>]; |
| |
| <span class="macro">assert_eq!</span>(s.find(x), <span class="prelude-val">None</span>);</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.rfind" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#1205-1207">source</a></span><h4 class="code-header">pub fn <a href="#method.rfind" class="fnname">rfind</a><'a, P>(&'a self, pat: P) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>><span class="where fmt-newline">where<br> P: <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html" title="trait core::str::pattern::Pattern">Pattern</a><'a>,<br> <P as <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html" title="trait core::str::pattern::Pattern">Pattern</a><'a>>::<a class="associatedtype" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html#associatedtype.Searcher" title="type core::str::pattern::Pattern::Searcher">Searcher</a>: <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.ReverseSearcher.html" title="trait core::str::pattern::ReverseSearcher">ReverseSearcher</a><'a>,</span></h4></section></summary><div class="docblock"><p>Returns the byte index for the first character of the last match of the pattern in |
| this string slice.</p> |
| <p>Returns <a href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html#variant.None" title="None"><code>None</code></a> if the pattern doesn’t match.</p> |
| <p>The <a href="https://doc.rust-lang.org/nightly/core/str/pattern/index.html">pattern</a> can be a <code>&str</code>, <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>, a slice of <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>s, or a |
| function or closure that determines if a character matches.</p> |
| <h5 id="examples-22"><a href="#examples-22">Examples</a></h5> |
| <p>Simple patterns:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>s = <span class="string">"Löwe 老虎 Léopard Gepardi"</span>; |
| |
| <span class="macro">assert_eq!</span>(s.rfind(<span class="string">'L'</span>), <span class="prelude-val">Some</span>(<span class="number">13</span>)); |
| <span class="macro">assert_eq!</span>(s.rfind(<span class="string">'é'</span>), <span class="prelude-val">Some</span>(<span class="number">14</span>)); |
| <span class="macro">assert_eq!</span>(s.rfind(<span class="string">"pard"</span>), <span class="prelude-val">Some</span>(<span class="number">24</span>));</code></pre></div> |
| <p>More complex patterns with closures:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>s = <span class="string">"Löwe 老虎 Léopard"</span>; |
| |
| <span class="macro">assert_eq!</span>(s.rfind(char::is_whitespace), <span class="prelude-val">Some</span>(<span class="number">12</span>)); |
| <span class="macro">assert_eq!</span>(s.rfind(char::is_lowercase), <span class="prelude-val">Some</span>(<span class="number">20</span>));</code></pre></div> |
| <p>Not finding the pattern:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>s = <span class="string">"Löwe 老虎 Léopard"</span>; |
| <span class="kw">let </span>x: <span class="kw-2">&</span>[<span class="kw">_</span>] = <span class="kw-2">&</span>[<span class="string">'1'</span>, <span class="string">'2'</span>]; |
| |
| <span class="macro">assert_eq!</span>(s.rfind(x), <span class="prelude-val">None</span>);</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.split" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#1327">source</a></span><h4 class="code-header">pub fn <a href="#method.split" class="fnname">split</a><'a, P>(&'a self, pat: P) -> <a class="struct" href="https://doc.rust-lang.org/nightly/core/str/iter/struct.Split.html" title="struct core::str::iter::Split">Split</a><'a, P><span class="where fmt-newline">where<br> P: <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html" title="trait core::str::pattern::Pattern">Pattern</a><'a>,</span></h4></section></summary><div class="docblock"><p>An iterator over substrings of this string slice, separated by |
| characters matched by a pattern.</p> |
| <p>The <a href="https://doc.rust-lang.org/nightly/core/str/pattern/index.html">pattern</a> can be a <code>&str</code>, <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>, a slice of <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>s, or a |
| function or closure that determines if a character matches.</p> |
| <h5 id="iterator-behavior"><a href="#iterator-behavior">Iterator behavior</a></h5> |
| <p>The returned iterator will be a <a href="https://doc.rust-lang.org/nightly/core/iter/traits/double_ended/trait.DoubleEndedIterator.html" title="DoubleEndedIterator"><code>DoubleEndedIterator</code></a> if the pattern |
| allows a reverse search and forward/reverse search yields the same |
| elements. This is true for, e.g., <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>, but not for <code>&str</code>.</p> |
| <p>If the pattern allows a reverse search but its results might differ |
| from a forward search, the <a href="https://doc.rust-lang.org/nightly/std/primitive.str.html#method.rsplit"><code>rsplit</code></a> method can be used.</p> |
| <h5 id="examples-23"><a href="#examples-23">Examples</a></h5> |
| <p>Simple patterns:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>v: Vec<<span class="kw-2">&</span>str> = <span class="string">"Mary had a little lamb"</span>.split(<span class="string">' '</span>).collect(); |
| <span class="macro">assert_eq!</span>(v, [<span class="string">"Mary"</span>, <span class="string">"had"</span>, <span class="string">"a"</span>, <span class="string">"little"</span>, <span class="string">"lamb"</span>]); |
| |
| <span class="kw">let </span>v: Vec<<span class="kw-2">&</span>str> = <span class="string">""</span>.split(<span class="string">'X'</span>).collect(); |
| <span class="macro">assert_eq!</span>(v, [<span class="string">""</span>]); |
| |
| <span class="kw">let </span>v: Vec<<span class="kw-2">&</span>str> = <span class="string">"lionXXtigerXleopard"</span>.split(<span class="string">'X'</span>).collect(); |
| <span class="macro">assert_eq!</span>(v, [<span class="string">"lion"</span>, <span class="string">""</span>, <span class="string">"tiger"</span>, <span class="string">"leopard"</span>]); |
| |
| <span class="kw">let </span>v: Vec<<span class="kw-2">&</span>str> = <span class="string">"lion::tiger::leopard"</span>.split(<span class="string">"::"</span>).collect(); |
| <span class="macro">assert_eq!</span>(v, [<span class="string">"lion"</span>, <span class="string">"tiger"</span>, <span class="string">"leopard"</span>]); |
| |
| <span class="kw">let </span>v: Vec<<span class="kw-2">&</span>str> = <span class="string">"abc1def2ghi"</span>.split(char::is_numeric).collect(); |
| <span class="macro">assert_eq!</span>(v, [<span class="string">"abc"</span>, <span class="string">"def"</span>, <span class="string">"ghi"</span>]); |
| |
| <span class="kw">let </span>v: Vec<<span class="kw-2">&</span>str> = <span class="string">"lionXtigerXleopard"</span>.split(char::is_uppercase).collect(); |
| <span class="macro">assert_eq!</span>(v, [<span class="string">"lion"</span>, <span class="string">"tiger"</span>, <span class="string">"leopard"</span>]);</code></pre></div> |
| <p>If the pattern is a slice of chars, split on each occurrence of any of the characters:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>v: Vec<<span class="kw-2">&</span>str> = <span class="string">"2020-11-03 23:59"</span>.split(<span class="kw-2">&</span>[<span class="string">'-'</span>, <span class="string">' '</span>, <span class="string">':'</span>, <span class="string">'@'</span>][..]).collect(); |
| <span class="macro">assert_eq!</span>(v, [<span class="string">"2020"</span>, <span class="string">"11"</span>, <span class="string">"03"</span>, <span class="string">"23"</span>, <span class="string">"59"</span>]);</code></pre></div> |
| <p>A more complex pattern, using a closure:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>v: Vec<<span class="kw-2">&</span>str> = <span class="string">"abc1defXghi"</span>.split(|c| c == <span class="string">'1' </span>|| c == <span class="string">'X'</span>).collect(); |
| <span class="macro">assert_eq!</span>(v, [<span class="string">"abc"</span>, <span class="string">"def"</span>, <span class="string">"ghi"</span>]);</code></pre></div> |
| <p>If a string contains multiple contiguous separators, you will end up |
| with empty strings in the output:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>x = <span class="string">"||||a||b|c"</span>.to_string(); |
| <span class="kw">let </span>d: Vec<<span class="kw">_</span>> = x.split(<span class="string">'|'</span>).collect(); |
| |
| <span class="macro">assert_eq!</span>(d, <span class="kw-2">&</span>[<span class="string">""</span>, <span class="string">""</span>, <span class="string">""</span>, <span class="string">""</span>, <span class="string">"a"</span>, <span class="string">""</span>, <span class="string">"b"</span>, <span class="string">"c"</span>]);</code></pre></div> |
| <p>Contiguous separators are separated by the empty string.</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>x = <span class="string">"(///)"</span>.to_string(); |
| <span class="kw">let </span>d: Vec<<span class="kw">_</span>> = x.split(<span class="string">'/'</span>).collect(); |
| |
| <span class="macro">assert_eq!</span>(d, <span class="kw-2">&</span>[<span class="string">"("</span>, <span class="string">""</span>, <span class="string">""</span>, <span class="string">")"</span>]);</code></pre></div> |
| <p>Separators at the start or end of a string are neighbored |
| by empty strings.</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>d: Vec<<span class="kw">_</span>> = <span class="string">"010"</span>.split(<span class="string">"0"</span>).collect(); |
| <span class="macro">assert_eq!</span>(d, <span class="kw-2">&</span>[<span class="string">""</span>, <span class="string">"1"</span>, <span class="string">""</span>]);</code></pre></div> |
| <p>When the empty string is used as a separator, it separates |
| every character in the string, along with the beginning |
| and end of the string.</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>f: Vec<<span class="kw">_</span>> = <span class="string">"rust"</span>.split(<span class="string">""</span>).collect(); |
| <span class="macro">assert_eq!</span>(f, <span class="kw-2">&</span>[<span class="string">""</span>, <span class="string">"r"</span>, <span class="string">"u"</span>, <span class="string">"s"</span>, <span class="string">"t"</span>, <span class="string">""</span>]);</code></pre></div> |
| <p>Contiguous separators can lead to possibly surprising behavior |
| when whitespace is used as the separator. This code is correct:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>x = <span class="string">" a b c"</span>.to_string(); |
| <span class="kw">let </span>d: Vec<<span class="kw">_</span>> = x.split(<span class="string">' '</span>).collect(); |
| |
| <span class="macro">assert_eq!</span>(d, <span class="kw-2">&</span>[<span class="string">""</span>, <span class="string">""</span>, <span class="string">""</span>, <span class="string">""</span>, <span class="string">"a"</span>, <span class="string">""</span>, <span class="string">"b"</span>, <span class="string">"c"</span>]);</code></pre></div> |
| <p>It does <em>not</em> give you:</p> |
| |
| <div class="example-wrap ignore"><div class='tooltip'>ⓘ</div><pre class="rust rust-example-rendered"><code><span class="macro">assert_eq!</span>(d, <span class="kw-2">&</span>[<span class="string">"a"</span>, <span class="string">"b"</span>, <span class="string">"c"</span>]);</code></pre></div> |
| <p>Use <a href="https://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_whitespace"><code>split_whitespace</code></a> for this behavior.</p> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.split_inclusive" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.51.0">1.51.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#1367">source</a></span><h4 class="code-header">pub fn <a href="#method.split_inclusive" class="fnname">split_inclusive</a><'a, P>(&'a self, pat: P) -> <a class="struct" href="https://doc.rust-lang.org/nightly/core/str/iter/struct.SplitInclusive.html" title="struct core::str::iter::SplitInclusive">SplitInclusive</a><'a, P><span class="where fmt-newline">where<br> P: <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html" title="trait core::str::pattern::Pattern">Pattern</a><'a>,</span></h4></section></summary><div class="docblock"><p>An iterator over substrings of this string slice, separated by |
| characters matched by a pattern. Differs from the iterator produced by |
| <code>split</code> in that <code>split_inclusive</code> leaves the matched part as the |
| terminator of the substring.</p> |
| <p>The <a href="https://doc.rust-lang.org/nightly/core/str/pattern/index.html">pattern</a> can be a <code>&str</code>, <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>, a slice of <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>s, or a |
| function or closure that determines if a character matches.</p> |
| <h5 id="examples-24"><a href="#examples-24">Examples</a></h5> |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>v: Vec<<span class="kw-2">&</span>str> = <span class="string">"Mary had a little lamb\nlittle lamb\nlittle lamb." |
| </span>.split_inclusive(<span class="string">'\n'</span>).collect(); |
| <span class="macro">assert_eq!</span>(v, [<span class="string">"Mary had a little lamb\n"</span>, <span class="string">"little lamb\n"</span>, <span class="string">"little lamb."</span>]);</code></pre></div> |
| <p>If the last element of the string is matched, |
| that element will be considered the terminator of the preceding substring. |
| That substring will be the last item returned by the iterator.</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>v: Vec<<span class="kw-2">&</span>str> = <span class="string">"Mary had a little lamb\nlittle lamb\nlittle lamb.\n" |
| </span>.split_inclusive(<span class="string">'\n'</span>).collect(); |
| <span class="macro">assert_eq!</span>(v, [<span class="string">"Mary had a little lamb\n"</span>, <span class="string">"little lamb\n"</span>, <span class="string">"little lamb.\n"</span>]);</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.rsplit" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#1422-1424">source</a></span><h4 class="code-header">pub fn <a href="#method.rsplit" class="fnname">rsplit</a><'a, P>(&'a self, pat: P) -> <a class="struct" href="https://doc.rust-lang.org/nightly/core/str/iter/struct.RSplit.html" title="struct core::str::iter::RSplit">RSplit</a><'a, P><span class="where fmt-newline">where<br> P: <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html" title="trait core::str::pattern::Pattern">Pattern</a><'a>,<br> <P as <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html" title="trait core::str::pattern::Pattern">Pattern</a><'a>>::<a class="associatedtype" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html#associatedtype.Searcher" title="type core::str::pattern::Pattern::Searcher">Searcher</a>: <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.ReverseSearcher.html" title="trait core::str::pattern::ReverseSearcher">ReverseSearcher</a><'a>,</span></h4></section></summary><div class="docblock"><p>An iterator over substrings of the given string slice, separated by |
| characters matched by a pattern and yielded in reverse order.</p> |
| <p>The <a href="https://doc.rust-lang.org/nightly/core/str/pattern/index.html">pattern</a> can be a <code>&str</code>, <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>, a slice of <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>s, or a |
| function or closure that determines if a character matches.</p> |
| <h5 id="iterator-behavior-1"><a href="#iterator-behavior-1">Iterator behavior</a></h5> |
| <p>The returned iterator requires that the pattern supports a reverse |
| search, and it will be a <a href="https://doc.rust-lang.org/nightly/core/iter/traits/double_ended/trait.DoubleEndedIterator.html" title="DoubleEndedIterator"><code>DoubleEndedIterator</code></a> if a forward/reverse |
| search yields the same elements.</p> |
| <p>For iterating from the front, the <a href="https://doc.rust-lang.org/nightly/std/primitive.str.html#method.split"><code>split</code></a> method can be used.</p> |
| <h5 id="examples-25"><a href="#examples-25">Examples</a></h5> |
| <p>Simple patterns:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>v: Vec<<span class="kw-2">&</span>str> = <span class="string">"Mary had a little lamb"</span>.rsplit(<span class="string">' '</span>).collect(); |
| <span class="macro">assert_eq!</span>(v, [<span class="string">"lamb"</span>, <span class="string">"little"</span>, <span class="string">"a"</span>, <span class="string">"had"</span>, <span class="string">"Mary"</span>]); |
| |
| <span class="kw">let </span>v: Vec<<span class="kw-2">&</span>str> = <span class="string">""</span>.rsplit(<span class="string">'X'</span>).collect(); |
| <span class="macro">assert_eq!</span>(v, [<span class="string">""</span>]); |
| |
| <span class="kw">let </span>v: Vec<<span class="kw-2">&</span>str> = <span class="string">"lionXXtigerXleopard"</span>.rsplit(<span class="string">'X'</span>).collect(); |
| <span class="macro">assert_eq!</span>(v, [<span class="string">"leopard"</span>, <span class="string">"tiger"</span>, <span class="string">""</span>, <span class="string">"lion"</span>]); |
| |
| <span class="kw">let </span>v: Vec<<span class="kw-2">&</span>str> = <span class="string">"lion::tiger::leopard"</span>.rsplit(<span class="string">"::"</span>).collect(); |
| <span class="macro">assert_eq!</span>(v, [<span class="string">"leopard"</span>, <span class="string">"tiger"</span>, <span class="string">"lion"</span>]);</code></pre></div> |
| <p>A more complex pattern, using a closure:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>v: Vec<<span class="kw-2">&</span>str> = <span class="string">"abc1defXghi"</span>.rsplit(|c| c == <span class="string">'1' </span>|| c == <span class="string">'X'</span>).collect(); |
| <span class="macro">assert_eq!</span>(v, [<span class="string">"ghi"</span>, <span class="string">"def"</span>, <span class="string">"abc"</span>]);</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.split_terminator" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#1473">source</a></span><h4 class="code-header">pub fn <a href="#method.split_terminator" class="fnname">split_terminator</a><'a, P>(&'a self, pat: P) -> <a class="struct" href="https://doc.rust-lang.org/nightly/core/str/iter/struct.SplitTerminator.html" title="struct core::str::iter::SplitTerminator">SplitTerminator</a><'a, P><span class="where fmt-newline">where<br> P: <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html" title="trait core::str::pattern::Pattern">Pattern</a><'a>,</span></h4></section></summary><div class="docblock"><p>An iterator over substrings of the given string slice, separated by |
| characters matched by a pattern.</p> |
| <p>The <a href="https://doc.rust-lang.org/nightly/core/str/pattern/index.html">pattern</a> can be a <code>&str</code>, <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>, a slice of <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>s, or a |
| function or closure that determines if a character matches.</p> |
| <p>Equivalent to <a href="https://doc.rust-lang.org/nightly/std/primitive.str.html#method.split"><code>split</code></a>, except that the trailing substring |
| is skipped if empty.</p> |
| <p>This method can be used for string data that is <em>terminated</em>, |
| rather than <em>separated</em> by a pattern.</p> |
| <h5 id="iterator-behavior-2"><a href="#iterator-behavior-2">Iterator behavior</a></h5> |
| <p>The returned iterator will be a <a href="https://doc.rust-lang.org/nightly/core/iter/traits/double_ended/trait.DoubleEndedIterator.html" title="DoubleEndedIterator"><code>DoubleEndedIterator</code></a> if the pattern |
| allows a reverse search and forward/reverse search yields the same |
| elements. This is true for, e.g., <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>, but not for <code>&str</code>.</p> |
| <p>If the pattern allows a reverse search but its results might differ |
| from a forward search, the <a href="https://doc.rust-lang.org/nightly/std/primitive.str.html#method.rsplit_terminator"><code>rsplit_terminator</code></a> method can be used.</p> |
| <h5 id="examples-26"><a href="#examples-26">Examples</a></h5> |
| <p>Basic usage:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>v: Vec<<span class="kw-2">&</span>str> = <span class="string">"A.B."</span>.split_terminator(<span class="string">'.'</span>).collect(); |
| <span class="macro">assert_eq!</span>(v, [<span class="string">"A"</span>, <span class="string">"B"</span>]); |
| |
| <span class="kw">let </span>v: Vec<<span class="kw-2">&</span>str> = <span class="string">"A..B.."</span>.split_terminator(<span class="string">"."</span>).collect(); |
| <span class="macro">assert_eq!</span>(v, [<span class="string">"A"</span>, <span class="string">""</span>, <span class="string">"B"</span>, <span class="string">""</span>]); |
| |
| <span class="kw">let </span>v: Vec<<span class="kw-2">&</span>str> = <span class="string">"A.B:C.D"</span>.split_terminator(<span class="kw-2">&</span>[<span class="string">'.'</span>, <span class="string">':'</span>][..]).collect(); |
| <span class="macro">assert_eq!</span>(v, [<span class="string">"A"</span>, <span class="string">"B"</span>, <span class="string">"C"</span>, <span class="string">"D"</span>]);</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.rsplit_terminator" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#1519-1521">source</a></span><h4 class="code-header">pub fn <a href="#method.rsplit_terminator" class="fnname">rsplit_terminator</a><'a, P>(&'a self, pat: P) -> <a class="struct" href="https://doc.rust-lang.org/nightly/core/str/iter/struct.RSplitTerminator.html" title="struct core::str::iter::RSplitTerminator">RSplitTerminator</a><'a, P><span class="where fmt-newline">where<br> P: <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html" title="trait core::str::pattern::Pattern">Pattern</a><'a>,<br> <P as <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html" title="trait core::str::pattern::Pattern">Pattern</a><'a>>::<a class="associatedtype" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html#associatedtype.Searcher" title="type core::str::pattern::Pattern::Searcher">Searcher</a>: <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.ReverseSearcher.html" title="trait core::str::pattern::ReverseSearcher">ReverseSearcher</a><'a>,</span></h4></section></summary><div class="docblock"><p>An iterator over substrings of <code>self</code>, separated by characters |
| matched by a pattern and yielded in reverse order.</p> |
| <p>The <a href="https://doc.rust-lang.org/nightly/core/str/pattern/index.html">pattern</a> can be a <code>&str</code>, <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>, a slice of <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>s, or a |
| function or closure that determines if a character matches.</p> |
| <p>Equivalent to <a href="https://doc.rust-lang.org/nightly/std/primitive.str.html#method.split"><code>split</code></a>, except that the trailing substring is |
| skipped if empty.</p> |
| <p>This method can be used for string data that is <em>terminated</em>, |
| rather than <em>separated</em> by a pattern.</p> |
| <h5 id="iterator-behavior-3"><a href="#iterator-behavior-3">Iterator behavior</a></h5> |
| <p>The returned iterator requires that the pattern supports a |
| reverse search, and it will be double ended if a forward/reverse |
| search yields the same elements.</p> |
| <p>For iterating from the front, the <a href="https://doc.rust-lang.org/nightly/std/primitive.str.html#method.split_terminator"><code>split_terminator</code></a> method can be |
| used.</p> |
| <h5 id="examples-27"><a href="#examples-27">Examples</a></h5> |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>v: Vec<<span class="kw-2">&</span>str> = <span class="string">"A.B."</span>.rsplit_terminator(<span class="string">'.'</span>).collect(); |
| <span class="macro">assert_eq!</span>(v, [<span class="string">"B"</span>, <span class="string">"A"</span>]); |
| |
| <span class="kw">let </span>v: Vec<<span class="kw-2">&</span>str> = <span class="string">"A..B.."</span>.rsplit_terminator(<span class="string">"."</span>).collect(); |
| <span class="macro">assert_eq!</span>(v, [<span class="string">""</span>, <span class="string">"B"</span>, <span class="string">""</span>, <span class="string">"A"</span>]); |
| |
| <span class="kw">let </span>v: Vec<<span class="kw-2">&</span>str> = <span class="string">"A.B:C.D"</span>.rsplit_terminator(<span class="kw-2">&</span>[<span class="string">'.'</span>, <span class="string">':'</span>][..]).collect(); |
| <span class="macro">assert_eq!</span>(v, [<span class="string">"D"</span>, <span class="string">"C"</span>, <span class="string">"B"</span>, <span class="string">"A"</span>]);</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.splitn" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#1574">source</a></span><h4 class="code-header">pub fn <a href="#method.splitn" class="fnname">splitn</a><'a, P>(&'a self, n: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, pat: P) -> <a class="struct" href="https://doc.rust-lang.org/nightly/core/str/iter/struct.SplitN.html" title="struct core::str::iter::SplitN">SplitN</a><'a, P><span class="where fmt-newline">where<br> P: <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html" title="trait core::str::pattern::Pattern">Pattern</a><'a>,</span></h4></section></summary><div class="docblock"><p>An iterator over substrings of the given string slice, separated by a |
| pattern, restricted to returning at most <code>n</code> items.</p> |
| <p>If <code>n</code> substrings are returned, the last substring (the <code>n</code>th substring) |
| will contain the remainder of the string.</p> |
| <p>The <a href="https://doc.rust-lang.org/nightly/core/str/pattern/index.html">pattern</a> can be a <code>&str</code>, <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>, a slice of <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>s, or a |
| function or closure that determines if a character matches.</p> |
| <h5 id="iterator-behavior-4"><a href="#iterator-behavior-4">Iterator behavior</a></h5> |
| <p>The returned iterator will not be double ended, because it is |
| not efficient to support.</p> |
| <p>If the pattern allows a reverse search, the <a href="https://doc.rust-lang.org/nightly/std/primitive.str.html#method.rsplitn"><code>rsplitn</code></a> method can be |
| used.</p> |
| <h5 id="examples-28"><a href="#examples-28">Examples</a></h5> |
| <p>Simple patterns:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>v: Vec<<span class="kw-2">&</span>str> = <span class="string">"Mary had a little lambda"</span>.splitn(<span class="number">3</span>, <span class="string">' '</span>).collect(); |
| <span class="macro">assert_eq!</span>(v, [<span class="string">"Mary"</span>, <span class="string">"had"</span>, <span class="string">"a little lambda"</span>]); |
| |
| <span class="kw">let </span>v: Vec<<span class="kw-2">&</span>str> = <span class="string">"lionXXtigerXleopard"</span>.splitn(<span class="number">3</span>, <span class="string">"X"</span>).collect(); |
| <span class="macro">assert_eq!</span>(v, [<span class="string">"lion"</span>, <span class="string">""</span>, <span class="string">"tigerXleopard"</span>]); |
| |
| <span class="kw">let </span>v: Vec<<span class="kw-2">&</span>str> = <span class="string">"abcXdef"</span>.splitn(<span class="number">1</span>, <span class="string">'X'</span>).collect(); |
| <span class="macro">assert_eq!</span>(v, [<span class="string">"abcXdef"</span>]); |
| |
| <span class="kw">let </span>v: Vec<<span class="kw-2">&</span>str> = <span class="string">""</span>.splitn(<span class="number">1</span>, <span class="string">'X'</span>).collect(); |
| <span class="macro">assert_eq!</span>(v, [<span class="string">""</span>]);</code></pre></div> |
| <p>A more complex pattern, using a closure:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>v: Vec<<span class="kw-2">&</span>str> = <span class="string">"abc1defXghi"</span>.splitn(<span class="number">2</span>, |c| c == <span class="string">'1' </span>|| c == <span class="string">'X'</span>).collect(); |
| <span class="macro">assert_eq!</span>(v, [<span class="string">"abc"</span>, <span class="string">"defXghi"</span>]);</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.rsplitn" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#1623-1625">source</a></span><h4 class="code-header">pub fn <a href="#method.rsplitn" class="fnname">rsplitn</a><'a, P>(&'a self, n: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>, pat: P) -> <a class="struct" href="https://doc.rust-lang.org/nightly/core/str/iter/struct.RSplitN.html" title="struct core::str::iter::RSplitN">RSplitN</a><'a, P><span class="where fmt-newline">where<br> P: <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html" title="trait core::str::pattern::Pattern">Pattern</a><'a>,<br> <P as <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html" title="trait core::str::pattern::Pattern">Pattern</a><'a>>::<a class="associatedtype" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html#associatedtype.Searcher" title="type core::str::pattern::Pattern::Searcher">Searcher</a>: <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.ReverseSearcher.html" title="trait core::str::pattern::ReverseSearcher">ReverseSearcher</a><'a>,</span></h4></section></summary><div class="docblock"><p>An iterator over substrings of this string slice, separated by a |
| pattern, starting from the end of the string, restricted to returning |
| at most <code>n</code> items.</p> |
| <p>If <code>n</code> substrings are returned, the last substring (the <code>n</code>th substring) |
| will contain the remainder of the string.</p> |
| <p>The <a href="https://doc.rust-lang.org/nightly/core/str/pattern/index.html">pattern</a> can be a <code>&str</code>, <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>, a slice of <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>s, or a |
| function or closure that determines if a character matches.</p> |
| <h5 id="iterator-behavior-5"><a href="#iterator-behavior-5">Iterator behavior</a></h5> |
| <p>The returned iterator will not be double ended, because it is not |
| efficient to support.</p> |
| <p>For splitting from the front, the <a href="https://doc.rust-lang.org/nightly/std/primitive.str.html#method.splitn"><code>splitn</code></a> method can be used.</p> |
| <h5 id="examples-29"><a href="#examples-29">Examples</a></h5> |
| <p>Simple patterns:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>v: Vec<<span class="kw-2">&</span>str> = <span class="string">"Mary had a little lamb"</span>.rsplitn(<span class="number">3</span>, <span class="string">' '</span>).collect(); |
| <span class="macro">assert_eq!</span>(v, [<span class="string">"lamb"</span>, <span class="string">"little"</span>, <span class="string">"Mary had a"</span>]); |
| |
| <span class="kw">let </span>v: Vec<<span class="kw-2">&</span>str> = <span class="string">"lionXXtigerXleopard"</span>.rsplitn(<span class="number">3</span>, <span class="string">'X'</span>).collect(); |
| <span class="macro">assert_eq!</span>(v, [<span class="string">"leopard"</span>, <span class="string">"tiger"</span>, <span class="string">"lionX"</span>]); |
| |
| <span class="kw">let </span>v: Vec<<span class="kw-2">&</span>str> = <span class="string">"lion::tiger::leopard"</span>.rsplitn(<span class="number">2</span>, <span class="string">"::"</span>).collect(); |
| <span class="macro">assert_eq!</span>(v, [<span class="string">"leopard"</span>, <span class="string">"lion::tiger"</span>]);</code></pre></div> |
| <p>A more complex pattern, using a closure:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>v: Vec<<span class="kw-2">&</span>str> = <span class="string">"abc1defXghi"</span>.rsplitn(<span class="number">2</span>, |c| c == <span class="string">'1' </span>|| c == <span class="string">'X'</span>).collect(); |
| <span class="macro">assert_eq!</span>(v, [<span class="string">"ghi"</span>, <span class="string">"abc1def"</span>]);</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.split_once" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.52.0">1.52.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#1643">source</a></span><h4 class="code-header">pub fn <a href="#method.split_once" class="fnname">split_once</a><'a, P>(&'a self, delimiter: P) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><(&'a <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>, &'a <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>)><span class="where fmt-newline">where<br> P: <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html" title="trait core::str::pattern::Pattern">Pattern</a><'a>,</span></h4></section></summary><div class="docblock"><p>Splits the string on the first occurrence of the specified delimiter and |
| returns prefix before delimiter and suffix after delimiter.</p> |
| <h5 id="examples-30"><a href="#examples-30">Examples</a></h5> |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="macro">assert_eq!</span>(<span class="string">"cfg"</span>.split_once(<span class="string">'='</span>), <span class="prelude-val">None</span>); |
| <span class="macro">assert_eq!</span>(<span class="string">"cfg="</span>.split_once(<span class="string">'='</span>), <span class="prelude-val">Some</span>((<span class="string">"cfg"</span>, <span class="string">""</span>))); |
| <span class="macro">assert_eq!</span>(<span class="string">"cfg=foo"</span>.split_once(<span class="string">'='</span>), <span class="prelude-val">Some</span>((<span class="string">"cfg"</span>, <span class="string">"foo"</span>))); |
| <span class="macro">assert_eq!</span>(<span class="string">"cfg=foo=bar"</span>.split_once(<span class="string">'='</span>), <span class="prelude-val">Some</span>((<span class="string">"cfg"</span>, <span class="string">"foo=bar"</span>)));</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.rsplit_once" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.52.0">1.52.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#1661-1663">source</a></span><h4 class="code-header">pub fn <a href="#method.rsplit_once" class="fnname">rsplit_once</a><'a, P>(&'a self, delimiter: P) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><(&'a <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>, &'a <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>)><span class="where fmt-newline">where<br> P: <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html" title="trait core::str::pattern::Pattern">Pattern</a><'a>,<br> <P as <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html" title="trait core::str::pattern::Pattern">Pattern</a><'a>>::<a class="associatedtype" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html#associatedtype.Searcher" title="type core::str::pattern::Pattern::Searcher">Searcher</a>: <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.ReverseSearcher.html" title="trait core::str::pattern::ReverseSearcher">ReverseSearcher</a><'a>,</span></h4></section></summary><div class="docblock"><p>Splits the string on the last occurrence of the specified delimiter and |
| returns prefix before delimiter and suffix after delimiter.</p> |
| <h5 id="examples-31"><a href="#examples-31">Examples</a></h5> |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="macro">assert_eq!</span>(<span class="string">"cfg"</span>.rsplit_once(<span class="string">'='</span>), <span class="prelude-val">None</span>); |
| <span class="macro">assert_eq!</span>(<span class="string">"cfg=foo"</span>.rsplit_once(<span class="string">'='</span>), <span class="prelude-val">Some</span>((<span class="string">"cfg"</span>, <span class="string">"foo"</span>))); |
| <span class="macro">assert_eq!</span>(<span class="string">"cfg=foo=bar"</span>.rsplit_once(<span class="string">'='</span>), <span class="prelude-val">Some</span>((<span class="string">"cfg=foo"</span>, <span class="string">"bar"</span>)));</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.matches" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.2.0">1.2.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#1703">source</a></span><h4 class="code-header">pub fn <a href="#method.matches" class="fnname">matches</a><'a, P>(&'a self, pat: P) -> <a class="struct" href="https://doc.rust-lang.org/nightly/core/str/iter/struct.Matches.html" title="struct core::str::iter::Matches">Matches</a><'a, P><span class="where fmt-newline">where<br> P: <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html" title="trait core::str::pattern::Pattern">Pattern</a><'a>,</span></h4></section></summary><div class="docblock"><p>An iterator over the disjoint matches of a pattern within the given string |
| slice.</p> |
| <p>The <a href="https://doc.rust-lang.org/nightly/core/str/pattern/index.html">pattern</a> can be a <code>&str</code>, <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>, a slice of <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>s, or a |
| function or closure that determines if a character matches.</p> |
| <h5 id="iterator-behavior-6"><a href="#iterator-behavior-6">Iterator behavior</a></h5> |
| <p>The returned iterator will be a <a href="https://doc.rust-lang.org/nightly/core/iter/traits/double_ended/trait.DoubleEndedIterator.html" title="DoubleEndedIterator"><code>DoubleEndedIterator</code></a> if the pattern |
| allows a reverse search and forward/reverse search yields the same |
| elements. This is true for, e.g., <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>, but not for <code>&str</code>.</p> |
| <p>If the pattern allows a reverse search but its results might differ |
| from a forward search, the <a href="https://doc.rust-lang.org/nightly/std/primitive.str.html#method.matches"><code>rmatches</code></a> method can be used.</p> |
| <h5 id="examples-32"><a href="#examples-32">Examples</a></h5> |
| <p>Basic usage:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>v: Vec<<span class="kw-2">&</span>str> = <span class="string">"abcXXXabcYYYabc"</span>.matches(<span class="string">"abc"</span>).collect(); |
| <span class="macro">assert_eq!</span>(v, [<span class="string">"abc"</span>, <span class="string">"abc"</span>, <span class="string">"abc"</span>]); |
| |
| <span class="kw">let </span>v: Vec<<span class="kw-2">&</span>str> = <span class="string">"1abc2abc3"</span>.matches(char::is_numeric).collect(); |
| <span class="macro">assert_eq!</span>(v, [<span class="string">"1"</span>, <span class="string">"2"</span>, <span class="string">"3"</span>]);</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.rmatches" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.2.0">1.2.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#1739-1741">source</a></span><h4 class="code-header">pub fn <a href="#method.rmatches" class="fnname">rmatches</a><'a, P>(&'a self, pat: P) -> <a class="struct" href="https://doc.rust-lang.org/nightly/core/str/iter/struct.RMatches.html" title="struct core::str::iter::RMatches">RMatches</a><'a, P><span class="where fmt-newline">where<br> P: <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html" title="trait core::str::pattern::Pattern">Pattern</a><'a>,<br> <P as <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html" title="trait core::str::pattern::Pattern">Pattern</a><'a>>::<a class="associatedtype" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html#associatedtype.Searcher" title="type core::str::pattern::Pattern::Searcher">Searcher</a>: <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.ReverseSearcher.html" title="trait core::str::pattern::ReverseSearcher">ReverseSearcher</a><'a>,</span></h4></section></summary><div class="docblock"><p>An iterator over the disjoint matches of a pattern within this string slice, |
| yielded in reverse order.</p> |
| <p>The <a href="https://doc.rust-lang.org/nightly/core/str/pattern/index.html">pattern</a> can be a <code>&str</code>, <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>, a slice of <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>s, or a |
| function or closure that determines if a character matches.</p> |
| <h5 id="iterator-behavior-7"><a href="#iterator-behavior-7">Iterator behavior</a></h5> |
| <p>The returned iterator requires that the pattern supports a reverse |
| search, and it will be a <a href="https://doc.rust-lang.org/nightly/core/iter/traits/double_ended/trait.DoubleEndedIterator.html" title="DoubleEndedIterator"><code>DoubleEndedIterator</code></a> if a forward/reverse |
| search yields the same elements.</p> |
| <p>For iterating from the front, the <a href="https://doc.rust-lang.org/nightly/std/primitive.str.html#method.matches"><code>matches</code></a> method can be used.</p> |
| <h5 id="examples-33"><a href="#examples-33">Examples</a></h5> |
| <p>Basic usage:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>v: Vec<<span class="kw-2">&</span>str> = <span class="string">"abcXXXabcYYYabc"</span>.rmatches(<span class="string">"abc"</span>).collect(); |
| <span class="macro">assert_eq!</span>(v, [<span class="string">"abc"</span>, <span class="string">"abc"</span>, <span class="string">"abc"</span>]); |
| |
| <span class="kw">let </span>v: Vec<<span class="kw-2">&</span>str> = <span class="string">"1abc2abc3"</span>.rmatches(char::is_numeric).collect(); |
| <span class="macro">assert_eq!</span>(v, [<span class="string">"3"</span>, <span class="string">"2"</span>, <span class="string">"1"</span>]);</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.match_indices" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.5.0">1.5.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#1785">source</a></span><h4 class="code-header">pub fn <a href="#method.match_indices" class="fnname">match_indices</a><'a, P>(&'a self, pat: P) -> <a class="struct" href="https://doc.rust-lang.org/nightly/core/str/iter/struct.MatchIndices.html" title="struct core::str::iter::MatchIndices">MatchIndices</a><'a, P><span class="where fmt-newline">where<br> P: <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html" title="trait core::str::pattern::Pattern">Pattern</a><'a>,</span></h4></section></summary><div class="docblock"><p>An iterator over the disjoint matches of a pattern within this string |
| slice as well as the index that the match starts at.</p> |
| <p>For matches of <code>pat</code> within <code>self</code> that overlap, only the indices |
| corresponding to the first match are returned.</p> |
| <p>The <a href="https://doc.rust-lang.org/nightly/core/str/pattern/index.html">pattern</a> can be a <code>&str</code>, <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>, a slice of <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>s, or a |
| function or closure that determines if a character matches.</p> |
| <h5 id="iterator-behavior-8"><a href="#iterator-behavior-8">Iterator behavior</a></h5> |
| <p>The returned iterator will be a <a href="https://doc.rust-lang.org/nightly/core/iter/traits/double_ended/trait.DoubleEndedIterator.html" title="DoubleEndedIterator"><code>DoubleEndedIterator</code></a> if the pattern |
| allows a reverse search and forward/reverse search yields the same |
| elements. This is true for, e.g., <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>, but not for <code>&str</code>.</p> |
| <p>If the pattern allows a reverse search but its results might differ |
| from a forward search, the <a href="https://doc.rust-lang.org/nightly/std/primitive.str.html#method.rmatch_indices"><code>rmatch_indices</code></a> method can be used.</p> |
| <h5 id="examples-34"><a href="#examples-34">Examples</a></h5> |
| <p>Basic usage:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>v: Vec<<span class="kw">_</span>> = <span class="string">"abcXXXabcYYYabc"</span>.match_indices(<span class="string">"abc"</span>).collect(); |
| <span class="macro">assert_eq!</span>(v, [(<span class="number">0</span>, <span class="string">"abc"</span>), (<span class="number">6</span>, <span class="string">"abc"</span>), (<span class="number">12</span>, <span class="string">"abc"</span>)]); |
| |
| <span class="kw">let </span>v: Vec<<span class="kw">_</span>> = <span class="string">"1abcabc2"</span>.match_indices(<span class="string">"abc"</span>).collect(); |
| <span class="macro">assert_eq!</span>(v, [(<span class="number">1</span>, <span class="string">"abc"</span>), (<span class="number">4</span>, <span class="string">"abc"</span>)]); |
| |
| <span class="kw">let </span>v: Vec<<span class="kw">_</span>> = <span class="string">"ababa"</span>.match_indices(<span class="string">"aba"</span>).collect(); |
| <span class="macro">assert_eq!</span>(v, [(<span class="number">0</span>, <span class="string">"aba"</span>)]); <span class="comment">// only the first `aba`</span></code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.rmatch_indices" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.5.0">1.5.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#1827-1829">source</a></span><h4 class="code-header">pub fn <a href="#method.rmatch_indices" class="fnname">rmatch_indices</a><'a, P>(&'a self, pat: P) -> <a class="struct" href="https://doc.rust-lang.org/nightly/core/str/iter/struct.RMatchIndices.html" title="struct core::str::iter::RMatchIndices">RMatchIndices</a><'a, P><span class="where fmt-newline">where<br> P: <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html" title="trait core::str::pattern::Pattern">Pattern</a><'a>,<br> <P as <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html" title="trait core::str::pattern::Pattern">Pattern</a><'a>>::<a class="associatedtype" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html#associatedtype.Searcher" title="type core::str::pattern::Pattern::Searcher">Searcher</a>: <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.ReverseSearcher.html" title="trait core::str::pattern::ReverseSearcher">ReverseSearcher</a><'a>,</span></h4></section></summary><div class="docblock"><p>An iterator over the disjoint matches of a pattern within <code>self</code>, |
| yielded in reverse order along with the index of the match.</p> |
| <p>For matches of <code>pat</code> within <code>self</code> that overlap, only the indices |
| corresponding to the last match are returned.</p> |
| <p>The <a href="https://doc.rust-lang.org/nightly/core/str/pattern/index.html">pattern</a> can be a <code>&str</code>, <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>, a slice of <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>s, or a |
| function or closure that determines if a character matches.</p> |
| <h5 id="iterator-behavior-9"><a href="#iterator-behavior-9">Iterator behavior</a></h5> |
| <p>The returned iterator requires that the pattern supports a reverse |
| search, and it will be a <a href="https://doc.rust-lang.org/nightly/core/iter/traits/double_ended/trait.DoubleEndedIterator.html" title="DoubleEndedIterator"><code>DoubleEndedIterator</code></a> if a forward/reverse |
| search yields the same elements.</p> |
| <p>For iterating from the front, the <a href="https://doc.rust-lang.org/nightly/std/primitive.str.html#method.match_indices"><code>match_indices</code></a> method can be used.</p> |
| <h5 id="examples-35"><a href="#examples-35">Examples</a></h5> |
| <p>Basic usage:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>v: Vec<<span class="kw">_</span>> = <span class="string">"abcXXXabcYYYabc"</span>.rmatch_indices(<span class="string">"abc"</span>).collect(); |
| <span class="macro">assert_eq!</span>(v, [(<span class="number">12</span>, <span class="string">"abc"</span>), (<span class="number">6</span>, <span class="string">"abc"</span>), (<span class="number">0</span>, <span class="string">"abc"</span>)]); |
| |
| <span class="kw">let </span>v: Vec<<span class="kw">_</span>> = <span class="string">"1abcabc2"</span>.rmatch_indices(<span class="string">"abc"</span>).collect(); |
| <span class="macro">assert_eq!</span>(v, [(<span class="number">4</span>, <span class="string">"abc"</span>), (<span class="number">1</span>, <span class="string">"abc"</span>)]); |
| |
| <span class="kw">let </span>v: Vec<<span class="kw">_</span>> = <span class="string">"ababa"</span>.rmatch_indices(<span class="string">"aba"</span>).collect(); |
| <span class="macro">assert_eq!</span>(v, [(<span class="number">2</span>, <span class="string">"aba"</span>)]); <span class="comment">// only the last `aba`</span></code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.trim" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#1853">source</a></span><h4 class="code-header">pub fn <a href="#method.trim" class="fnname">trim</a>(&self) -> &<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a></h4></section></summary><div class="docblock"><p>Returns a string slice with leading and trailing whitespace removed.</p> |
| <p>‘Whitespace’ is defined according to the terms of the Unicode Derived |
| Core Property <code>White_Space</code>, which includes newlines.</p> |
| <h5 id="examples-36"><a href="#examples-36">Examples</a></h5> |
| <p>Basic usage:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>s = <span class="string">"\n Hello\tworld\t\n"</span>; |
| |
| <span class="macro">assert_eq!</span>(<span class="string">"Hello\tworld"</span>, s.trim());</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.trim_start" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.30.0">1.30.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#1892">source</a></span><h4 class="code-header">pub fn <a href="#method.trim_start" class="fnname">trim_start</a>(&self) -> &<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a></h4></section></summary><div class="docblock"><p>Returns a string slice with leading whitespace removed.</p> |
| <p>‘Whitespace’ is defined according to the terms of the Unicode Derived |
| Core Property <code>White_Space</code>, which includes newlines.</p> |
| <h5 id="text-directionality"><a href="#text-directionality">Text directionality</a></h5> |
| <p>A string is a sequence of bytes. <code>start</code> in this context means the first |
| position of that byte string; for a left-to-right language like English or |
| Russian, this will be left side, and for right-to-left languages like |
| Arabic or Hebrew, this will be the right side.</p> |
| <h5 id="examples-37"><a href="#examples-37">Examples</a></h5> |
| <p>Basic usage:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>s = <span class="string">"\n Hello\tworld\t\n"</span>; |
| <span class="macro">assert_eq!</span>(<span class="string">"Hello\tworld\t\n"</span>, s.trim_start());</code></pre></div> |
| <p>Directionality:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>s = <span class="string">" English "</span>; |
| <span class="macro">assert!</span>(<span class="prelude-val">Some</span>(<span class="string">'E'</span>) == s.trim_start().chars().next()); |
| |
| <span class="kw">let </span>s = <span class="string">" עברית "</span>; |
| <span class="macro">assert!</span>(<span class="prelude-val">Some</span>(<span class="string">'ע'</span>) == s.trim_start().chars().next());</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.trim_end" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.30.0">1.30.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#1931">source</a></span><h4 class="code-header">pub fn <a href="#method.trim_end" class="fnname">trim_end</a>(&self) -> &<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a></h4></section></summary><div class="docblock"><p>Returns a string slice with trailing whitespace removed.</p> |
| <p>‘Whitespace’ is defined according to the terms of the Unicode Derived |
| Core Property <code>White_Space</code>, which includes newlines.</p> |
| <h5 id="text-directionality-1"><a href="#text-directionality-1">Text directionality</a></h5> |
| <p>A string is a sequence of bytes. <code>end</code> in this context means the last |
| position of that byte string; for a left-to-right language like English or |
| Russian, this will be right side, and for right-to-left languages like |
| Arabic or Hebrew, this will be the left side.</p> |
| <h5 id="examples-38"><a href="#examples-38">Examples</a></h5> |
| <p>Basic usage:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>s = <span class="string">"\n Hello\tworld\t\n"</span>; |
| <span class="macro">assert_eq!</span>(<span class="string">"\n Hello\tworld"</span>, s.trim_end());</code></pre></div> |
| <p>Directionality:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>s = <span class="string">" English "</span>; |
| <span class="macro">assert!</span>(<span class="prelude-val">Some</span>(<span class="string">'h'</span>) == s.trim_end().chars().rev().next()); |
| |
| <span class="kw">let </span>s = <span class="string">" עברית "</span>; |
| <span class="macro">assert!</span>(<span class="prelude-val">Some</span>(<span class="string">'ת'</span>) == s.trim_end().chars().rev().next());</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.trim_left" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#1971">source</a></span><h4 class="code-header">pub fn <a href="#method.trim_left" class="fnname">trim_left</a>(&self) -> &<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a></h4></section><span class="item-info"><div class="stab deprecated"><span class="emoji">👎</span><span>Deprecated since 1.33.0: superseded by <code>trim_start</code></span></div></span></summary><div class="docblock"><p>Returns a string slice with leading whitespace removed.</p> |
| <p>‘Whitespace’ is defined according to the terms of the Unicode Derived |
| Core Property <code>White_Space</code>.</p> |
| <h5 id="text-directionality-2"><a href="#text-directionality-2">Text directionality</a></h5> |
| <p>A string is a sequence of bytes. ‘Left’ in this context means the first |
| position of that byte string; for a language like Arabic or Hebrew |
| which are ‘right to left’ rather than ‘left to right’, this will be |
| the <em>right</em> side, not the left.</p> |
| <h5 id="examples-39"><a href="#examples-39">Examples</a></h5> |
| <p>Basic usage:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>s = <span class="string">" Hello\tworld\t"</span>; |
| |
| <span class="macro">assert_eq!</span>(<span class="string">"Hello\tworld\t"</span>, s.trim_left());</code></pre></div> |
| <p>Directionality:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>s = <span class="string">" English"</span>; |
| <span class="macro">assert!</span>(<span class="prelude-val">Some</span>(<span class="string">'E'</span>) == s.trim_left().chars().next()); |
| |
| <span class="kw">let </span>s = <span class="string">" עברית"</span>; |
| <span class="macro">assert!</span>(<span class="prelude-val">Some</span>(<span class="string">'ע'</span>) == s.trim_left().chars().next());</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.trim_right" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#2011">source</a></span><h4 class="code-header">pub fn <a href="#method.trim_right" class="fnname">trim_right</a>(&self) -> &<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a></h4></section><span class="item-info"><div class="stab deprecated"><span class="emoji">👎</span><span>Deprecated since 1.33.0: superseded by <code>trim_end</code></span></div></span></summary><div class="docblock"><p>Returns a string slice with trailing whitespace removed.</p> |
| <p>‘Whitespace’ is defined according to the terms of the Unicode Derived |
| Core Property <code>White_Space</code>.</p> |
| <h5 id="text-directionality-3"><a href="#text-directionality-3">Text directionality</a></h5> |
| <p>A string is a sequence of bytes. ‘Right’ in this context means the last |
| position of that byte string; for a language like Arabic or Hebrew |
| which are ‘right to left’ rather than ‘left to right’, this will be |
| the <em>left</em> side, not the right.</p> |
| <h5 id="examples-40"><a href="#examples-40">Examples</a></h5> |
| <p>Basic usage:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>s = <span class="string">" Hello\tworld\t"</span>; |
| |
| <span class="macro">assert_eq!</span>(<span class="string">" Hello\tworld"</span>, s.trim_right());</code></pre></div> |
| <p>Directionality:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>s = <span class="string">"English "</span>; |
| <span class="macro">assert!</span>(<span class="prelude-val">Some</span>(<span class="string">'h'</span>) == s.trim_right().chars().rev().next()); |
| |
| <span class="kw">let </span>s = <span class="string">"עברית "</span>; |
| <span class="macro">assert!</span>(<span class="prelude-val">Some</span>(<span class="string">'ת'</span>) == s.trim_right().chars().rev().next());</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.trim_matches" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#2044-2046">source</a></span><h4 class="code-header">pub fn <a href="#method.trim_matches" class="fnname">trim_matches</a><'a, P>(&'a self, pat: P) -> &'a <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a><span class="where fmt-newline">where<br> P: <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html" title="trait core::str::pattern::Pattern">Pattern</a><'a>,<br> <P as <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html" title="trait core::str::pattern::Pattern">Pattern</a><'a>>::<a class="associatedtype" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html#associatedtype.Searcher" title="type core::str::pattern::Pattern::Searcher">Searcher</a>: <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.DoubleEndedSearcher.html" title="trait core::str::pattern::DoubleEndedSearcher">DoubleEndedSearcher</a><'a>,</span></h4></section></summary><div class="docblock"><p>Returns a string slice with all prefixes and suffixes that match a |
| pattern repeatedly removed.</p> |
| <p>The <a href="https://doc.rust-lang.org/nightly/core/str/pattern/index.html">pattern</a> can be a <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>, a slice of <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>s, or a function |
| or closure that determines if a character matches.</p> |
| <h5 id="examples-41"><a href="#examples-41">Examples</a></h5> |
| <p>Simple patterns:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="macro">assert_eq!</span>(<span class="string">"11foo1bar11"</span>.trim_matches(<span class="string">'1'</span>), <span class="string">"foo1bar"</span>); |
| <span class="macro">assert_eq!</span>(<span class="string">"123foo1bar123"</span>.trim_matches(char::is_numeric), <span class="string">"foo1bar"</span>); |
| |
| <span class="kw">let </span>x: <span class="kw-2">&</span>[<span class="kw">_</span>] = <span class="kw-2">&</span>[<span class="string">'1'</span>, <span class="string">'2'</span>]; |
| <span class="macro">assert_eq!</span>(<span class="string">"12foo1bar12"</span>.trim_matches(x), <span class="string">"foo1bar"</span>);</code></pre></div> |
| <p>A more complex pattern, using a closure:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="macro">assert_eq!</span>(<span class="string">"1foo1barXX"</span>.trim_matches(|c| c == <span class="string">'1' </span>|| c == <span class="string">'X'</span>), <span class="string">"foo1bar"</span>);</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.trim_start_matches" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.30.0">1.30.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#2093">source</a></span><h4 class="code-header">pub fn <a href="#method.trim_start_matches" class="fnname">trim_start_matches</a><'a, P>(&'a self, pat: P) -> &'a <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a><span class="where fmt-newline">where<br> P: <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html" title="trait core::str::pattern::Pattern">Pattern</a><'a>,</span></h4></section></summary><div class="docblock"><p>Returns a string slice with all prefixes that match a pattern |
| repeatedly removed.</p> |
| <p>The <a href="https://doc.rust-lang.org/nightly/core/str/pattern/index.html">pattern</a> can be a <code>&str</code>, <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>, a slice of <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>s, or a |
| function or closure that determines if a character matches.</p> |
| <h5 id="text-directionality-4"><a href="#text-directionality-4">Text directionality</a></h5> |
| <p>A string is a sequence of bytes. <code>start</code> in this context means the first |
| position of that byte string; for a left-to-right language like English or |
| Russian, this will be left side, and for right-to-left languages like |
| Arabic or Hebrew, this will be the right side.</p> |
| <h5 id="examples-42"><a href="#examples-42">Examples</a></h5> |
| <p>Basic usage:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="macro">assert_eq!</span>(<span class="string">"11foo1bar11"</span>.trim_start_matches(<span class="string">'1'</span>), <span class="string">"foo1bar11"</span>); |
| <span class="macro">assert_eq!</span>(<span class="string">"123foo1bar123"</span>.trim_start_matches(char::is_numeric), <span class="string">"foo1bar123"</span>); |
| |
| <span class="kw">let </span>x: <span class="kw-2">&</span>[<span class="kw">_</span>] = <span class="kw-2">&</span>[<span class="string">'1'</span>, <span class="string">'2'</span>]; |
| <span class="macro">assert_eq!</span>(<span class="string">"12foo1bar12"</span>.trim_start_matches(x), <span class="string">"foo1bar12"</span>);</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.strip_prefix" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.45.0">1.45.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#2126">source</a></span><h4 class="code-header">pub fn <a href="#method.strip_prefix" class="fnname">strip_prefix</a><'a, P>(&'a self, prefix: P) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><&'a <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>><span class="where fmt-newline">where<br> P: <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html" title="trait core::str::pattern::Pattern">Pattern</a><'a>,</span></h4></section></summary><div class="docblock"><p>Returns a string slice with the prefix removed.</p> |
| <p>If the string starts with the pattern <code>prefix</code>, returns substring after the prefix, wrapped |
| in <code>Some</code>. Unlike <code>trim_start_matches</code>, this method removes the prefix exactly once.</p> |
| <p>If the string does not start with <code>prefix</code>, returns <code>None</code>.</p> |
| <p>The <a href="https://doc.rust-lang.org/nightly/core/str/pattern/index.html">pattern</a> can be a <code>&str</code>, <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>, a slice of <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>s, or a |
| function or closure that determines if a character matches.</p> |
| <h5 id="examples-43"><a href="#examples-43">Examples</a></h5> |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="macro">assert_eq!</span>(<span class="string">"foo:bar"</span>.strip_prefix(<span class="string">"foo:"</span>), <span class="prelude-val">Some</span>(<span class="string">"bar"</span>)); |
| <span class="macro">assert_eq!</span>(<span class="string">"foo:bar"</span>.strip_prefix(<span class="string">"bar"</span>), <span class="prelude-val">None</span>); |
| <span class="macro">assert_eq!</span>(<span class="string">"foofoo"</span>.strip_prefix(<span class="string">"foo"</span>), <span class="prelude-val">Some</span>(<span class="string">"foo"</span>));</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.strip_suffix" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.45.0">1.45.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#2153-2156">source</a></span><h4 class="code-header">pub fn <a href="#method.strip_suffix" class="fnname">strip_suffix</a><'a, P>(&'a self, suffix: P) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><&'a <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>><span class="where fmt-newline">where<br> P: <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html" title="trait core::str::pattern::Pattern">Pattern</a><'a>,<br> <P as <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html" title="trait core::str::pattern::Pattern">Pattern</a><'a>>::<a class="associatedtype" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html#associatedtype.Searcher" title="type core::str::pattern::Pattern::Searcher">Searcher</a>: <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.ReverseSearcher.html" title="trait core::str::pattern::ReverseSearcher">ReverseSearcher</a><'a>,</span></h4></section></summary><div class="docblock"><p>Returns a string slice with the suffix removed.</p> |
| <p>If the string ends with the pattern <code>suffix</code>, returns the substring before the suffix, |
| wrapped in <code>Some</code>. Unlike <code>trim_end_matches</code>, this method removes the suffix exactly once.</p> |
| <p>If the string does not end with <code>suffix</code>, returns <code>None</code>.</p> |
| <p>The <a href="https://doc.rust-lang.org/nightly/core/str/pattern/index.html">pattern</a> can be a <code>&str</code>, <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>, a slice of <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>s, or a |
| function or closure that determines if a character matches.</p> |
| <h5 id="examples-44"><a href="#examples-44">Examples</a></h5> |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="macro">assert_eq!</span>(<span class="string">"bar:foo"</span>.strip_suffix(<span class="string">":foo"</span>), <span class="prelude-val">Some</span>(<span class="string">"bar"</span>)); |
| <span class="macro">assert_eq!</span>(<span class="string">"bar:foo"</span>.strip_suffix(<span class="string">"bar"</span>), <span class="prelude-val">None</span>); |
| <span class="macro">assert_eq!</span>(<span class="string">"foofoo"</span>.strip_suffix(<span class="string">"foo"</span>), <span class="prelude-val">Some</span>(<span class="string">"foo"</span>));</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.trim_end_matches" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.30.0">1.30.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#2197-2199">source</a></span><h4 class="code-header">pub fn <a href="#method.trim_end_matches" class="fnname">trim_end_matches</a><'a, P>(&'a self, pat: P) -> &'a <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a><span class="where fmt-newline">where<br> P: <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html" title="trait core::str::pattern::Pattern">Pattern</a><'a>,<br> <P as <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html" title="trait core::str::pattern::Pattern">Pattern</a><'a>>::<a class="associatedtype" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html#associatedtype.Searcher" title="type core::str::pattern::Pattern::Searcher">Searcher</a>: <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.ReverseSearcher.html" title="trait core::str::pattern::ReverseSearcher">ReverseSearcher</a><'a>,</span></h4></section></summary><div class="docblock"><p>Returns a string slice with all suffixes that match a pattern |
| repeatedly removed.</p> |
| <p>The <a href="https://doc.rust-lang.org/nightly/core/str/pattern/index.html">pattern</a> can be a <code>&str</code>, <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>, a slice of <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>s, or a |
| function or closure that determines if a character matches.</p> |
| <h5 id="text-directionality-5"><a href="#text-directionality-5">Text directionality</a></h5> |
| <p>A string is a sequence of bytes. <code>end</code> in this context means the last |
| position of that byte string; for a left-to-right language like English or |
| Russian, this will be right side, and for right-to-left languages like |
| Arabic or Hebrew, this will be the left side.</p> |
| <h5 id="examples-45"><a href="#examples-45">Examples</a></h5> |
| <p>Simple patterns:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="macro">assert_eq!</span>(<span class="string">"11foo1bar11"</span>.trim_end_matches(<span class="string">'1'</span>), <span class="string">"11foo1bar"</span>); |
| <span class="macro">assert_eq!</span>(<span class="string">"123foo1bar123"</span>.trim_end_matches(char::is_numeric), <span class="string">"123foo1bar"</span>); |
| |
| <span class="kw">let </span>x: <span class="kw-2">&</span>[<span class="kw">_</span>] = <span class="kw-2">&</span>[<span class="string">'1'</span>, <span class="string">'2'</span>]; |
| <span class="macro">assert_eq!</span>(<span class="string">"12foo1bar12"</span>.trim_end_matches(x), <span class="string">"12foo1bar"</span>);</code></pre></div> |
| <p>A more complex pattern, using a closure:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="macro">assert_eq!</span>(<span class="string">"1fooX"</span>.trim_end_matches(|c| c == <span class="string">'1' </span>|| c == <span class="string">'X'</span>), <span class="string">"1foo"</span>);</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.trim_left_matches" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#2243">source</a></span><h4 class="code-header">pub fn <a href="#method.trim_left_matches" class="fnname">trim_left_matches</a><'a, P>(&'a self, pat: P) -> &'a <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a><span class="where fmt-newline">where<br> P: <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html" title="trait core::str::pattern::Pattern">Pattern</a><'a>,</span></h4></section><span class="item-info"><div class="stab deprecated"><span class="emoji">👎</span><span>Deprecated since 1.33.0: superseded by <code>trim_start_matches</code></span></div></span></summary><div class="docblock"><p>Returns a string slice with all prefixes that match a pattern |
| repeatedly removed.</p> |
| <p>The <a href="https://doc.rust-lang.org/nightly/core/str/pattern/index.html">pattern</a> can be a <code>&str</code>, <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>, a slice of <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>s, or a |
| function or closure that determines if a character matches.</p> |
| <h5 id="text-directionality-6"><a href="#text-directionality-6">Text directionality</a></h5> |
| <p>A string is a sequence of bytes. ‘Left’ in this context means the first |
| position of that byte string; for a language like Arabic or Hebrew |
| which are ‘right to left’ rather than ‘left to right’, this will be |
| the <em>right</em> side, not the left.</p> |
| <h5 id="examples-46"><a href="#examples-46">Examples</a></h5> |
| <p>Basic usage:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="macro">assert_eq!</span>(<span class="string">"11foo1bar11"</span>.trim_left_matches(<span class="string">'1'</span>), <span class="string">"foo1bar11"</span>); |
| <span class="macro">assert_eq!</span>(<span class="string">"123foo1bar123"</span>.trim_left_matches(char::is_numeric), <span class="string">"foo1bar123"</span>); |
| |
| <span class="kw">let </span>x: <span class="kw-2">&</span>[<span class="kw">_</span>] = <span class="kw-2">&</span>[<span class="string">'1'</span>, <span class="string">'2'</span>]; |
| <span class="macro">assert_eq!</span>(<span class="string">"12foo1bar12"</span>.trim_left_matches(x), <span class="string">"foo1bar12"</span>);</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.trim_right_matches" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#2286-2288">source</a></span><h4 class="code-header">pub fn <a href="#method.trim_right_matches" class="fnname">trim_right_matches</a><'a, P>(&'a self, pat: P) -> &'a <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a><span class="where fmt-newline">where<br> P: <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html" title="trait core::str::pattern::Pattern">Pattern</a><'a>,<br> <P as <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html" title="trait core::str::pattern::Pattern">Pattern</a><'a>>::<a class="associatedtype" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html#associatedtype.Searcher" title="type core::str::pattern::Pattern::Searcher">Searcher</a>: <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.ReverseSearcher.html" title="trait core::str::pattern::ReverseSearcher">ReverseSearcher</a><'a>,</span></h4></section><span class="item-info"><div class="stab deprecated"><span class="emoji">👎</span><span>Deprecated since 1.33.0: superseded by <code>trim_end_matches</code></span></div></span></summary><div class="docblock"><p>Returns a string slice with all suffixes that match a pattern |
| repeatedly removed.</p> |
| <p>The <a href="https://doc.rust-lang.org/nightly/core/str/pattern/index.html">pattern</a> can be a <code>&str</code>, <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>, a slice of <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html"><code>char</code></a>s, or a |
| function or closure that determines if a character matches.</p> |
| <h5 id="text-directionality-7"><a href="#text-directionality-7">Text directionality</a></h5> |
| <p>A string is a sequence of bytes. ‘Right’ in this context means the last |
| position of that byte string; for a language like Arabic or Hebrew |
| which are ‘right to left’ rather than ‘left to right’, this will be |
| the <em>left</em> side, not the right.</p> |
| <h5 id="examples-47"><a href="#examples-47">Examples</a></h5> |
| <p>Simple patterns:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="macro">assert_eq!</span>(<span class="string">"11foo1bar11"</span>.trim_right_matches(<span class="string">'1'</span>), <span class="string">"11foo1bar"</span>); |
| <span class="macro">assert_eq!</span>(<span class="string">"123foo1bar123"</span>.trim_right_matches(char::is_numeric), <span class="string">"123foo1bar"</span>); |
| |
| <span class="kw">let </span>x: <span class="kw-2">&</span>[<span class="kw">_</span>] = <span class="kw-2">&</span>[<span class="string">'1'</span>, <span class="string">'2'</span>]; |
| <span class="macro">assert_eq!</span>(<span class="string">"12foo1bar12"</span>.trim_right_matches(x), <span class="string">"12foo1bar"</span>);</code></pre></div> |
| <p>A more complex pattern, using a closure:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="macro">assert_eq!</span>(<span class="string">"1fooX"</span>.trim_right_matches(|c| c == <span class="string">'1' </span>|| c == <span class="string">'X'</span>), <span class="string">"1foo"</span>);</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.parse" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#2338">source</a></span><h4 class="code-header">pub fn <a href="#method.parse" class="fnname">parse</a><F>(&self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><F, <F as <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/traits/trait.FromStr.html" title="trait core::str::traits::FromStr">FromStr</a>>::<a class="associatedtype" href="https://doc.rust-lang.org/nightly/core/str/traits/trait.FromStr.html#associatedtype.Err" title="type core::str::traits::FromStr::Err">Err</a>><span class="where fmt-newline">where<br> F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/traits/trait.FromStr.html" title="trait core::str::traits::FromStr">FromStr</a>,</span></h4></section></summary><div class="docblock"><p>Parses this string slice into another type.</p> |
| <p>Because <code>parse</code> is so general, it can cause problems with type |
| inference. As such, <code>parse</code> is one of the few times you’ll see |
| the syntax affectionately known as the ‘turbofish’: <code>::<></code>. This |
| helps the inference algorithm understand specifically which type |
| you’re trying to parse into.</p> |
| <p><code>parse</code> can parse into any type that implements the <a href="https://doc.rust-lang.org/nightly/core/str/traits/trait.FromStr.html" title="FromStr"><code>FromStr</code></a> trait.</p> |
| <h5 id="errors"><a href="#errors">Errors</a></h5> |
| <p>Will return <a href="https://doc.rust-lang.org/nightly/core/str/traits/trait.FromStr.html#associatedtype.Err"><code>Err</code></a> if it’s not possible to parse this string slice into |
| the desired type.</p> |
| <h5 id="examples-48"><a href="#examples-48">Examples</a></h5> |
| <p>Basic usage</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>four: u32 = <span class="string">"4"</span>.parse().unwrap(); |
| |
| <span class="macro">assert_eq!</span>(<span class="number">4</span>, four);</code></pre></div> |
| <p>Using the ‘turbofish’ instead of annotating <code>four</code>:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>four = <span class="string">"4"</span>.parse::<u32>(); |
| |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Ok</span>(<span class="number">4</span>), four);</code></pre></div> |
| <p>Failing to parse:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>nope = <span class="string">"j"</span>.parse::<u32>(); |
| |
| <span class="macro">assert!</span>(nope.is_err());</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.is_ascii" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.23.0">1.23.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#2356">source</a></span><h4 class="code-header">pub fn <a href="#method.is_ascii" class="fnname">is_ascii</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></h4></section></summary><div class="docblock"><p>Checks if all characters in this string are within the ASCII range.</p> |
| <h5 id="examples-49"><a href="#examples-49">Examples</a></h5> |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>ascii = <span class="string">"hello!\n"</span>; |
| <span class="kw">let </span>non_ascii = <span class="string">"Grüße, Jürgen ❤"</span>; |
| |
| <span class="macro">assert!</span>(ascii.is_ascii()); |
| <span class="macro">assert!</span>(!non_ascii.is_ascii());</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.eq_ignore_ascii_case" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.23.0">1.23.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#2378">source</a></span><h4 class="code-header">pub fn <a href="#method.eq_ignore_ascii_case" class="fnname">eq_ignore_ascii_case</a>(&self, other: &<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a></h4></section></summary><div class="docblock"><p>Checks that two strings are an ASCII case-insensitive match.</p> |
| <p>Same as <code>to_ascii_lowercase(a) == to_ascii_lowercase(b)</code>, |
| but without allocating and copying temporaries.</p> |
| <h5 id="examples-50"><a href="#examples-50">Examples</a></h5> |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="macro">assert!</span>(<span class="string">"Ferris"</span>.eq_ignore_ascii_case(<span class="string">"FERRIS"</span>)); |
| <span class="macro">assert!</span>(<span class="string">"Ferrös"</span>.eq_ignore_ascii_case(<span class="string">"FERRöS"</span>)); |
| <span class="macro">assert!</span>(!<span class="string">"Ferrös"</span>.eq_ignore_ascii_case(<span class="string">"FERRÖS"</span>));</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.escape_debug" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.34.0">1.34.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#2473">source</a></span><h4 class="code-header">pub fn <a href="#method.escape_debug" class="fnname">escape_debug</a>(&self) -> <a class="struct" href="https://doc.rust-lang.org/nightly/core/str/iter/struct.EscapeDebug.html" title="struct core::str::iter::EscapeDebug">EscapeDebug</a><'_></h4></section></summary><div class="docblock"><p>Return an iterator that escapes each char in <code>self</code> with <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html#method.escape_debug" title="char::escape_debug"><code>char::escape_debug</code></a>.</p> |
| <p>Note: only extended grapheme codepoints that begin the string will be |
| escaped.</p> |
| <h5 id="examples-51"><a href="#examples-51">Examples</a></h5> |
| <p>As an iterator:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">for </span>c <span class="kw">in </span><span class="string">"❤\n!"</span>.escape_debug() { |
| <span class="macro">print!</span>(<span class="string">"{c}"</span>); |
| } |
| <span class="macro">println!</span>();</code></pre></div> |
| <p>Using <code>println!</code> directly:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="macro">println!</span>(<span class="string">"{}"</span>, <span class="string">"❤\n!"</span>.escape_debug());</code></pre></div> |
| <p>Both are equivalent to:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="macro">println!</span>(<span class="string">"❤\\n!"</span>);</code></pre></div> |
| <p>Using <code>to_string</code>:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="macro">assert_eq!</span>(<span class="string">"❤\n!"</span>.escape_debug().to_string(), <span class="string">"❤\\n!"</span>);</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.escape_default" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.34.0">1.34.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#2519">source</a></span><h4 class="code-header">pub fn <a href="#method.escape_default" class="fnname">escape_default</a>(&self) -> <a class="struct" href="https://doc.rust-lang.org/nightly/core/str/iter/struct.EscapeDefault.html" title="struct core::str::iter::EscapeDefault">EscapeDefault</a><'_></h4></section></summary><div class="docblock"><p>Return an iterator that escapes each char in <code>self</code> with <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html#method.escape_default" title="char::escape_default"><code>char::escape_default</code></a>.</p> |
| <h5 id="examples-52"><a href="#examples-52">Examples</a></h5> |
| <p>As an iterator:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">for </span>c <span class="kw">in </span><span class="string">"❤\n!"</span>.escape_default() { |
| <span class="macro">print!</span>(<span class="string">"{c}"</span>); |
| } |
| <span class="macro">println!</span>();</code></pre></div> |
| <p>Using <code>println!</code> directly:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="macro">println!</span>(<span class="string">"{}"</span>, <span class="string">"❤\n!"</span>.escape_default());</code></pre></div> |
| <p>Both are equivalent to:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="macro">println!</span>(<span class="string">"\\u{{2764}}\\n!"</span>);</code></pre></div> |
| <p>Using <code>to_string</code>:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="macro">assert_eq!</span>(<span class="string">"❤\n!"</span>.escape_default().to_string(), <span class="string">"\\u{2764}\\n!"</span>);</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.escape_unicode" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.34.0">1.34.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/str/mod.rs.html#2557">source</a></span><h4 class="code-header">pub fn <a href="#method.escape_unicode" class="fnname">escape_unicode</a>(&self) -> <a class="struct" href="https://doc.rust-lang.org/nightly/core/str/iter/struct.EscapeUnicode.html" title="struct core::str::iter::EscapeUnicode">EscapeUnicode</a><'_></h4></section></summary><div class="docblock"><p>Return an iterator that escapes each char in <code>self</code> with <a href="https://doc.rust-lang.org/nightly/std/primitive.char.html#method.escape_unicode" title="char::escape_unicode"><code>char::escape_unicode</code></a>.</p> |
| <h5 id="examples-53"><a href="#examples-53">Examples</a></h5> |
| <p>As an iterator:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">for </span>c <span class="kw">in </span><span class="string">"❤\n!"</span>.escape_unicode() { |
| <span class="macro">print!</span>(<span class="string">"{c}"</span>); |
| } |
| <span class="macro">println!</span>();</code></pre></div> |
| <p>Using <code>println!</code> directly:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="macro">println!</span>(<span class="string">"{}"</span>, <span class="string">"❤\n!"</span>.escape_unicode());</code></pre></div> |
| <p>Both are equivalent to:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="macro">println!</span>(<span class="string">"\\u{{2764}}\\u{{a}}\\u{{21}}"</span>);</code></pre></div> |
| <p>Using <code>to_string</code>:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="macro">assert_eq!</span>(<span class="string">"❤\n!"</span>.escape_unicode().to_string(), <span class="string">"\\u{2764}\\u{a}\\u{21}"</span>);</code></pre></div> |
| </div></details></div><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.replace" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.0.0">1.0.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/alloc/str.rs.html#271">source</a></span><h4 class="code-header">pub fn <a href="#method.replace" class="fnname">replace</a><'a, P>(&'a self, from: P, to: &<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>) -> <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/string/struct.String.html" title="struct alloc::string::String">String</a><span class="where fmt-newline">where<br> P: <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html" title="trait core::str::pattern::Pattern">Pattern</a><'a>,</span></h4></section></summary><div class="docblock"><p>Replaces all matches of a pattern with another string.</p> |
| <p><code>replace</code> creates a new <a href="https://doc.rust-lang.org/nightly/alloc/string/struct.String.html" title="String"><code>String</code></a>, and copies the data from this string slice into it. |
| While doing so, it attempts to find matches of a pattern. If it finds any, it |
| replaces them with the replacement string slice.</p> |
| <h5 id="examples-54"><a href="#examples-54">Examples</a></h5> |
| <p>Basic usage:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>s = <span class="string">"this is old"</span>; |
| |
| <span class="macro">assert_eq!</span>(<span class="string">"this is new"</span>, s.replace(<span class="string">"old"</span>, <span class="string">"new"</span>)); |
| <span class="macro">assert_eq!</span>(<span class="string">"than an old"</span>, s.replace(<span class="string">"is"</span>, <span class="string">"an"</span>));</code></pre></div> |
| <p>When the pattern doesn’t match:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>s = <span class="string">"this is old"</span>; |
| <span class="macro">assert_eq!</span>(s, s.replace(<span class="string">"cookie monster"</span>, <span class="string">"little lamb"</span>));</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.replacen" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.16.0">1.16.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/alloc/str.rs.html#311">source</a></span><h4 class="code-header">pub fn <a href="#method.replacen" class="fnname">replacen</a><'a, P>(&'a self, pat: P, to: &<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>, count: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>) -> <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/string/struct.String.html" title="struct alloc::string::String">String</a><span class="where fmt-newline">where<br> P: <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/pattern/trait.Pattern.html" title="trait core::str::pattern::Pattern">Pattern</a><'a>,</span></h4></section></summary><div class="docblock"><p>Replaces first N matches of a pattern with another string.</p> |
| <p><code>replacen</code> creates a new <a href="https://doc.rust-lang.org/nightly/alloc/string/struct.String.html" title="String"><code>String</code></a>, and copies the data from this string slice into it. |
| While doing so, it attempts to find matches of a pattern. If it finds any, it |
| replaces them with the replacement string slice at most <code>count</code> times.</p> |
| <h5 id="examples-55"><a href="#examples-55">Examples</a></h5> |
| <p>Basic usage:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>s = <span class="string">"foo foo 123 foo"</span>; |
| <span class="macro">assert_eq!</span>(<span class="string">"new new 123 foo"</span>, s.replacen(<span class="string">"foo"</span>, <span class="string">"new"</span>, <span class="number">2</span>)); |
| <span class="macro">assert_eq!</span>(<span class="string">"faa fao 123 foo"</span>, s.replacen(<span class="string">'o'</span>, <span class="string">"a"</span>, <span class="number">3</span>)); |
| <span class="macro">assert_eq!</span>(<span class="string">"foo foo new23 foo"</span>, s.replacen(char::is_numeric, <span class="string">"new"</span>, <span class="number">1</span>));</code></pre></div> |
| <p>When the pattern doesn’t match:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>s = <span class="string">"this is old"</span>; |
| <span class="macro">assert_eq!</span>(s, s.replacen(<span class="string">"cookie monster"</span>, <span class="string">"little lamb"</span>, <span class="number">10</span>));</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.to_lowercase" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.2.0">1.2.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/alloc/str.rs.html#368">source</a></span><h4 class="code-header">pub fn <a href="#method.to_lowercase" class="fnname">to_lowercase</a>(&self) -> <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/string/struct.String.html" title="struct alloc::string::String">String</a></h4></section></summary><div class="docblock"><p>Returns the lowercase equivalent of this string slice, as a new <a href="https://doc.rust-lang.org/nightly/alloc/string/struct.String.html" title="String"><code>String</code></a>.</p> |
| <p>‘Lowercase’ is defined according to the terms of the Unicode Derived Core Property |
| <code>Lowercase</code>.</p> |
| <p>Since some characters can expand into multiple characters when changing |
| the case, this function returns a <a href="https://doc.rust-lang.org/nightly/alloc/string/struct.String.html" title="String"><code>String</code></a> instead of modifying the |
| parameter in-place.</p> |
| <h5 id="examples-56"><a href="#examples-56">Examples</a></h5> |
| <p>Basic usage:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>s = <span class="string">"HELLO"</span>; |
| |
| <span class="macro">assert_eq!</span>(<span class="string">"hello"</span>, s.to_lowercase());</code></pre></div> |
| <p>A tricky example, with sigma:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>sigma = <span class="string">"Σ"</span>; |
| |
| <span class="macro">assert_eq!</span>(<span class="string">"σ"</span>, sigma.to_lowercase()); |
| |
| <span class="comment">// but at the end of a word, it's ς, not σ: |
| </span><span class="kw">let </span>odysseus = <span class="string">"ὈΔΥΣΣΕΎΣ"</span>; |
| |
| <span class="macro">assert_eq!</span>(<span class="string">"ὀδυσσεύς"</span>, odysseus.to_lowercase());</code></pre></div> |
| <p>Languages without case are not changed:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>new_year = <span class="string">"农历新年"</span>; |
| |
| <span class="macro">assert_eq!</span>(new_year, new_year.to_lowercase());</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.to_uppercase" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.2.0">1.2.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/alloc/str.rs.html#459">source</a></span><h4 class="code-header">pub fn <a href="#method.to_uppercase" class="fnname">to_uppercase</a>(&self) -> <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/string/struct.String.html" title="struct alloc::string::String">String</a></h4></section></summary><div class="docblock"><p>Returns the uppercase equivalent of this string slice, as a new <a href="https://doc.rust-lang.org/nightly/alloc/string/struct.String.html" title="String"><code>String</code></a>.</p> |
| <p>‘Uppercase’ is defined according to the terms of the Unicode Derived Core Property |
| <code>Uppercase</code>.</p> |
| <p>Since some characters can expand into multiple characters when changing |
| the case, this function returns a <a href="https://doc.rust-lang.org/nightly/alloc/string/struct.String.html" title="String"><code>String</code></a> instead of modifying the |
| parameter in-place.</p> |
| <h5 id="examples-57"><a href="#examples-57">Examples</a></h5> |
| <p>Basic usage:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>s = <span class="string">"hello"</span>; |
| |
| <span class="macro">assert_eq!</span>(<span class="string">"HELLO"</span>, s.to_uppercase());</code></pre></div> |
| <p>Scripts without case are not changed:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>new_year = <span class="string">"农历新年"</span>; |
| |
| <span class="macro">assert_eq!</span>(new_year, new_year.to_uppercase());</code></pre></div> |
| <p>One character can become multiple:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>s = <span class="string">"tschüß"</span>; |
| |
| <span class="macro">assert_eq!</span>(<span class="string">"TSCHÜSS"</span>, s.to_uppercase());</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.repeat" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.16.0">1.16.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/alloc/str.rs.html#531">source</a></span><h4 class="code-header">pub fn <a href="#method.repeat" class="fnname">repeat</a>(&self, n: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.usize.html">usize</a>) -> <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/string/struct.String.html" title="struct alloc::string::String">String</a></h4></section></summary><div class="docblock"><p>Creates a new <a href="https://doc.rust-lang.org/nightly/alloc/string/struct.String.html" title="String"><code>String</code></a> by repeating a string <code>n</code> times.</p> |
| <h5 id="panics-2"><a href="#panics-2">Panics</a></h5> |
| <p>This function will panic if the capacity would overflow.</p> |
| <h5 id="examples-58"><a href="#examples-58">Examples</a></h5> |
| <p>Basic usage:</p> |
| |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="macro">assert_eq!</span>(<span class="string">"abc"</span>.repeat(<span class="number">4</span>), String::from(<span class="string">"abcabcabcabc"</span>));</code></pre></div> |
| <p>A panic upon overflow:</p> |
| |
| <div class="example-wrap should_panic"><div class='tooltip'>ⓘ</div><pre class="rust rust-example-rendered"><code><span class="comment">// this will panic at runtime |
| </span><span class="kw">let </span>huge = <span class="string">"0123456789abcdef"</span>.repeat(usize::MAX);</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.to_ascii_uppercase" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.23.0">1.23.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/alloc/str.rs.html#561">source</a></span><h4 class="code-header">pub fn <a href="#method.to_ascii_uppercase" class="fnname">to_ascii_uppercase</a>(&self) -> <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/string/struct.String.html" title="struct alloc::string::String">String</a></h4></section></summary><div class="docblock"><p>Returns a copy of this string where each character is mapped to its |
| ASCII upper case equivalent.</p> |
| <p>ASCII letters ‘a’ to ‘z’ are mapped to ‘A’ to ‘Z’, |
| but non-ASCII letters are unchanged.</p> |
| <p>To uppercase the value in-place, use <a href="https://doc.rust-lang.org/nightly/std/primitive.str.html#method.make_ascii_uppercase"><code>make_ascii_uppercase</code></a>.</p> |
| <p>To uppercase ASCII characters in addition to non-ASCII characters, use |
| <a href="#method.to_uppercase"><code>to_uppercase</code></a>.</p> |
| <h5 id="examples-59"><a href="#examples-59">Examples</a></h5> |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>s = <span class="string">"Grüße, Jürgen ❤"</span>; |
| |
| <span class="macro">assert_eq!</span>(<span class="string">"GRüßE, JüRGEN ❤"</span>, s.to_ascii_uppercase());</code></pre></div> |
| </div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.to_ascii_lowercase" class="method has-srclink"><span class="rightside"><span class="since" title="Stable since Rust version 1.23.0">1.23.0</span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/alloc/str.rs.html#594">source</a></span><h4 class="code-header">pub fn <a href="#method.to_ascii_lowercase" class="fnname">to_ascii_lowercase</a>(&self) -> <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/string/struct.String.html" title="struct alloc::string::String">String</a></h4></section></summary><div class="docblock"><p>Returns a copy of this string where each character is mapped to its |
| ASCII lower case equivalent.</p> |
| <p>ASCII letters ‘A’ to ‘Z’ are mapped to ‘a’ to ‘z’, |
| but non-ASCII letters are unchanged.</p> |
| <p>To lowercase the value in-place, use <a href="https://doc.rust-lang.org/nightly/std/primitive.str.html#method.make_ascii_lowercase"><code>make_ascii_lowercase</code></a>.</p> |
| <p>To lowercase ASCII characters in addition to non-ASCII characters, use |
| <a href="#method.to_lowercase"><code>to_lowercase</code></a>.</p> |
| <h5 id="examples-60"><a href="#examples-60">Examples</a></h5> |
| <div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>s = <span class="string">"Grüße, Jürgen ❤"</span>; |
| |
| <span class="macro">assert_eq!</span>(<span class="string">"grüße, jürgen ❤"</span>, s.to_ascii_lowercase());</code></pre></div> |
| </div></details></div></div><h2 id="trait-implementations" class="small-section-header">Trait Implementations<a href="#trait-implementations" class="anchor"></a></h2><div id="trait-implementations-list"><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-AsRef%3C%5Bu8%5D%3E-for-OpensslStringRef" class="impl has-srclink"><a class="srclink rightside" href="../../src/openssl/string.rs.html#64-68">source</a><a href="#impl-AsRef%3C%5Bu8%5D%3E-for-OpensslStringRef" class="anchor"></a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.AsRef.html" title="trait core::convert::AsRef">AsRef</a><[<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a>]> for <a class="struct" href="struct.OpensslStringRef.html" title="struct openssl::string::OpensslStringRef">OpensslStringRef</a></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.as_ref-2" class="method trait-impl has-srclink"><a class="srclink rightside" href="../../src/openssl/string.rs.html#65-67">source</a><a href="#method.as_ref-2" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/convert/trait.AsRef.html#tymethod.as_ref" class="fnname">as_ref</a>(&self) -> &[<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a>]<span class="notable-traits"><span class="notable-traits-tooltip">ⓘ<span class="notable-traits-tooltiptext"><span class="docblock"><span class="notable">Notable traits for &[<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a>]</span><code class="content"><span class="where fmt-newline">impl <a class="trait" href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html" title="trait std::io::Read">Read</a> for &[<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a>]</span><span class="where fmt-newline">impl <a class="trait" href="https://doc.rust-lang.org/nightly/std/io/trait.Write.html" title="trait std::io::Write">Write</a> for &mut [<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a>]</span></code></span></span></span></span></h4></section></summary><div class='docblock'>Converts this type into a shared reference of the (usually inferred) input type.</div></details></div></details><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-AsRef%3COpensslStringRef%3E-for-OpensslString" class="impl has-srclink"><a class="srclink rightside" href="../../src/openssl/string.rs.html#11-17">source</a><a href="#impl-AsRef%3COpensslStringRef%3E-for-OpensslString" class="anchor"></a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.AsRef.html" title="trait core::convert::AsRef">AsRef</a><<a class="struct" href="struct.OpensslStringRef.html" title="struct openssl::string::OpensslStringRef">OpensslStringRef</a>> for <a class="struct" href="struct.OpensslString.html" title="struct openssl::string::OpensslString">OpensslString</a></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.as_ref" class="method trait-impl has-srclink"><a class="srclink rightside" href="../../src/openssl/string.rs.html#11-17">source</a><a href="#method.as_ref" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/convert/trait.AsRef.html#tymethod.as_ref" class="fnname">as_ref</a>(&self) -> &<a class="struct" href="struct.OpensslStringRef.html" title="struct openssl::string::OpensslStringRef">OpensslStringRef</a></h4></section></summary><div class='docblock'>Converts this type into a shared reference of the (usually inferred) input type.</div></details></div></details><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-AsRef%3Cstr%3E-for-OpensslStringRef" class="impl has-srclink"><a class="srclink rightside" href="../../src/openssl/string.rs.html#58-62">source</a><a href="#impl-AsRef%3Cstr%3E-for-OpensslStringRef" class="anchor"></a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.AsRef.html" title="trait core::convert::AsRef">AsRef</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>> for <a class="struct" href="struct.OpensslStringRef.html" title="struct openssl::string::OpensslStringRef">OpensslStringRef</a></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.as_ref-1" class="method trait-impl has-srclink"><a class="srclink rightside" href="../../src/openssl/string.rs.html#59-61">source</a><a href="#method.as_ref-1" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/convert/trait.AsRef.html#tymethod.as_ref" class="fnname">as_ref</a>(&self) -> &<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a></h4></section></summary><div class='docblock'>Converts this type into a shared reference of the (usually inferred) input type.</div></details></div></details><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-Borrow%3COpensslStringRef%3E-for-OpensslString" class="impl has-srclink"><a class="srclink rightside" href="../../src/openssl/string.rs.html#11-17">source</a><a href="#impl-Borrow%3COpensslStringRef%3E-for-OpensslString" class="anchor"></a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/borrow/trait.Borrow.html" title="trait core::borrow::Borrow">Borrow</a><<a class="struct" href="struct.OpensslStringRef.html" title="struct openssl::string::OpensslStringRef">OpensslStringRef</a>> for <a class="struct" href="struct.OpensslString.html" title="struct openssl::string::OpensslString">OpensslString</a></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.borrow" class="method trait-impl has-srclink"><a class="srclink rightside" href="../../src/openssl/string.rs.html#11-17">source</a><a href="#method.borrow" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/borrow/trait.Borrow.html#tymethod.borrow" class="fnname">borrow</a>(&self) -> &<a class="struct" href="struct.OpensslStringRef.html" title="struct openssl::string::OpensslStringRef">OpensslStringRef</a></h4></section></summary><div class='docblock'>Immutably borrows from an owned value. <a href="https://doc.rust-lang.org/nightly/core/borrow/trait.Borrow.html#tymethod.borrow">Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-Debug-for-OpensslStringRef" class="impl has-srclink"><a class="srclink rightside" href="../../src/openssl/string.rs.html#76-80">source</a><a href="#impl-Debug-for-OpensslStringRef" class="anchor"></a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a> for <a class="struct" href="struct.OpensslStringRef.html" title="struct openssl::string::OpensslStringRef">OpensslStringRef</a></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.fmt-1" class="method trait-impl has-srclink"><a class="srclink rightside" href="../../src/openssl/string.rs.html#77-79">source</a><a href="#method.fmt-1" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt" class="fnname">fmt</a>(&self, f: &mut <a class="struct" href="https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a><'_>) -> <a class="type" href="https://doc.rust-lang.org/nightly/core/fmt/type.Result.html" title="type core::fmt::Result">Result</a></h4></section></summary><div class='docblock'>Formats the value using the given formatter. <a href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt">Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-Deref-for-OpensslStringRef" class="impl has-srclink"><a class="srclink rightside" href="../../src/openssl/string.rs.html#47-56">source</a><a href="#impl-Deref-for-OpensslStringRef" class="anchor"></a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/deref/trait.Deref.html" title="trait core::ops::deref::Deref">Deref</a> for <a class="struct" href="struct.OpensslStringRef.html" title="struct openssl::string::OpensslStringRef">OpensslStringRef</a></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle" open><summary><section id="associatedtype.Target" class="associatedtype trait-impl has-srclink"><a href="#associatedtype.Target" class="anchor"></a><h4 class="code-header">type <a href="https://doc.rust-lang.org/nightly/core/ops/deref/trait.Deref.html#associatedtype.Target" class="associatedtype">Target</a> = <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a></h4></section></summary><div class='docblock'>The resulting type after dereferencing.</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.deref" class="method trait-impl has-srclink"><a class="srclink rightside" href="../../src/openssl/string.rs.html#50-55">source</a><a href="#method.deref" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/ops/deref/trait.Deref.html#tymethod.deref" class="fnname">deref</a>(&self) -> &<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a></h4></section></summary><div class='docblock'>Dereferences the value.</div></details></div></details><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-Display-for-OpensslStringRef" class="impl has-srclink"><a class="srclink rightside" href="../../src/openssl/string.rs.html#70-74">source</a><a href="#impl-Display-for-OpensslStringRef" class="anchor"></a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/fmt/trait.Display.html" title="trait core::fmt::Display">Display</a> for <a class="struct" href="struct.OpensslStringRef.html" title="struct openssl::string::OpensslStringRef">OpensslStringRef</a></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.fmt" class="method trait-impl has-srclink"><a class="srclink rightside" href="../../src/openssl/string.rs.html#71-73">source</a><a href="#method.fmt" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/fmt/trait.Display.html#tymethod.fmt" class="fnname">fmt</a>(&self, f: &mut <a class="struct" href="https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a><'_>) -> <a class="type" href="https://doc.rust-lang.org/nightly/core/fmt/type.Result.html" title="type core::fmt::Result">Result</a></h4></section></summary><div class='docblock'>Formats the value using the given formatter. <a href="https://doc.rust-lang.org/nightly/core/fmt/trait.Display.html#tymethod.fmt">Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle" open><summary><section id="impl-ForeignTypeRef-for-OpensslStringRef" class="impl has-srclink"><a class="srclink rightside" href="../../src/openssl/string.rs.html#11-17">source</a><a href="#impl-ForeignTypeRef-for-OpensslStringRef" class="anchor"></a><h3 class="code-header">impl <a class="trait" href="../../foreign_types_shared/trait.ForeignTypeRef.html" title="trait foreign_types_shared::ForeignTypeRef">ForeignTypeRef</a> for <a class="struct" href="struct.OpensslStringRef.html" title="struct openssl::string::OpensslStringRef">OpensslStringRef</a></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle" open><summary><section id="associatedtype.CType" class="associatedtype trait-impl has-srclink"><a href="#associatedtype.CType" class="anchor"></a><h4 class="code-header">type <a href="../../foreign_types_shared/trait.ForeignTypeRef.html#associatedtype.CType" class="associatedtype">CType</a> = <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.i8.html">i8</a></h4></section></summary><div class='docblock'>The raw C type.</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.from_ptr" class="method trait-impl has-srclink"><a class="srclink rightside" href="../../src/foreign_types_shared/lib.rs.html#36">source</a><a href="#method.from_ptr" class="anchor"></a><h4 class="code-header">unsafe fn <a href="../../foreign_types_shared/trait.ForeignTypeRef.html#method.from_ptr" class="fnname">from_ptr</a><'a>(ptr: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.pointer.html">*mut </a>Self::<a class="associatedtype" href="../../foreign_types_shared/trait.ForeignTypeRef.html#associatedtype.CType" title="type foreign_types_shared::ForeignTypeRef::CType">CType</a>) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&'a </a>Self</h4></section></summary><div class='docblock'>Constructs a shared instance of this type from its raw type.</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.from_ptr_mut" class="method trait-impl has-srclink"><a class="srclink rightside" href="../../src/foreign_types_shared/lib.rs.html#42">source</a><a href="#method.from_ptr_mut" class="anchor"></a><h4 class="code-header">unsafe fn <a href="../../foreign_types_shared/trait.ForeignTypeRef.html#method.from_ptr_mut" class="fnname">from_ptr_mut</a><'a>(ptr: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.pointer.html">*mut </a>Self::<a class="associatedtype" href="../../foreign_types_shared/trait.ForeignTypeRef.html#associatedtype.CType" title="type foreign_types_shared::ForeignTypeRef::CType">CType</a>) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&'a mut </a>Self</h4></section></summary><div class='docblock'>Constructs a mutable reference of this type from its raw type.</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.as_ptr-1" class="method trait-impl has-srclink"><a class="srclink rightside" href="../../src/foreign_types_shared/lib.rs.html#48">source</a><a href="#method.as_ptr-1" class="anchor"></a><h4 class="code-header">fn <a href="../../foreign_types_shared/trait.ForeignTypeRef.html#method.as_ptr" class="fnname">as_ptr</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.pointer.html">*mut </a>Self::<a class="associatedtype" href="../../foreign_types_shared/trait.ForeignTypeRef.html#associatedtype.CType" title="type foreign_types_shared::ForeignTypeRef::CType">CType</a></h4></section></summary><div class='docblock'>Returns a raw pointer to the wrapped value.</div></details></div></details><section id="impl-Send-for-OpensslStringRef" class="impl has-srclink"><a class="srclink rightside" href="../../src/openssl/string.rs.html#11-17">source</a><a href="#impl-Send-for-OpensslStringRef" class="anchor"></a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> for <a class="struct" href="struct.OpensslStringRef.html" title="struct openssl::string::OpensslStringRef">OpensslStringRef</a></h3></section><section id="impl-Sync-for-OpensslStringRef" class="impl has-srclink"><a class="srclink rightside" href="../../src/openssl/string.rs.html#11-17">source</a><a href="#impl-Sync-for-OpensslStringRef" class="anchor"></a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> for <a class="struct" href="struct.OpensslStringRef.html" title="struct openssl::string::OpensslStringRef">OpensslStringRef</a></h3></section></div><h2 id="synthetic-implementations" class="small-section-header">Auto Trait Implementations<a href="#synthetic-implementations" class="anchor"></a></h2><div id="synthetic-implementations-list"><section id="impl-RefUnwindSafe-for-OpensslStringRef" class="impl has-srclink"><a href="#impl-RefUnwindSafe-for-OpensslStringRef" class="anchor"></a><h3 class="code-header">impl !<a class="trait" href="https://doc.rust-lang.org/nightly/core/panic/unwind_safe/trait.RefUnwindSafe.html" title="trait core::panic::unwind_safe::RefUnwindSafe">RefUnwindSafe</a> for <a class="struct" href="struct.OpensslStringRef.html" title="struct openssl::string::OpensslStringRef">OpensslStringRef</a></h3></section><section id="impl-Unpin-for-OpensslStringRef" class="impl has-srclink"><a href="#impl-Unpin-for-OpensslStringRef" class="anchor"></a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a> for <a class="struct" href="struct.OpensslStringRef.html" title="struct openssl::string::OpensslStringRef">OpensslStringRef</a></h3></section><section id="impl-UnwindSafe-for-OpensslStringRef" class="impl has-srclink"><a href="#impl-UnwindSafe-for-OpensslStringRef" class="anchor"></a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/panic/unwind_safe/trait.UnwindSafe.html" title="trait core::panic::unwind_safe::UnwindSafe">UnwindSafe</a> for <a class="struct" href="struct.OpensslStringRef.html" title="struct openssl::string::OpensslStringRef">OpensslStringRef</a></h3></section></div><h2 id="blanket-implementations" class="small-section-header">Blanket Implementations<a href="#blanket-implementations" class="anchor"></a></h2><div id="blanket-implementations-list"><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-Any-for-OpensslStringRef" class="impl has-srclink"><a class="srclink rightside" href="https://doc.rust-lang.org/nightly/src/core/any.rs.html#200">source</a><a href="#impl-Any-for-OpensslStringRef" class="anchor"></a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/any/trait.Any.html" title="trait core::any::Any">Any</a> for T<span class="where fmt-newline">where<br> T: 'static + ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.type_id" class="method trait-impl has-srclink"><a class="srclink rightside" href="https://doc.rust-lang.org/nightly/src/core/any.rs.html#201">source</a><a href="#method.type_id" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/any/trait.Any.html#tymethod.type_id" class="fnname">type_id</a>(&self) -> <a class="struct" href="https://doc.rust-lang.org/nightly/core/any/struct.TypeId.html" title="struct core::any::TypeId">TypeId</a></h4></section></summary><div class='docblock'>Gets the <code>TypeId</code> of <code>self</code>. <a href="https://doc.rust-lang.org/nightly/core/any/trait.Any.html#tymethod.type_id">Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-Borrow%3CT%3E-for-OpensslStringRef" class="impl has-srclink"><a class="srclink rightside" href="https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#211">source</a><a href="#impl-Borrow%3CT%3E-for-OpensslStringRef" class="anchor"></a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/borrow/trait.Borrow.html" title="trait core::borrow::Borrow">Borrow</a><T> for T<span class="where fmt-newline">where<br> T: ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.borrow-1" class="method trait-impl has-srclink"><span class="rightside"><span class="since" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/91522" title="Tracking issue for const_borrow">unstable</a></span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#213">source</a></span><a href="#method.borrow-1" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/borrow/trait.Borrow.html#tymethod.borrow" class="fnname">borrow</a>(&self) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&</a>T</h4></section></summary><div class='docblock'>Immutably borrows from an owned value. <a href="https://doc.rust-lang.org/nightly/core/borrow/trait.Borrow.html#tymethod.borrow">Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-BorrowMut%3CT%3E-for-OpensslStringRef" class="impl has-srclink"><a class="srclink rightside" href="https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#220">source</a><a href="#impl-BorrowMut%3CT%3E-for-OpensslStringRef" class="anchor"></a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/borrow/trait.BorrowMut.html" title="trait core::borrow::BorrowMut">BorrowMut</a><T> for T<span class="where fmt-newline">where<br> T: ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.borrow_mut" class="method trait-impl has-srclink"><span class="rightside"><span class="since" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/91522" title="Tracking issue for const_borrow">unstable</a></span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/borrow.rs.html#221">source</a></span><a href="#method.borrow_mut" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut" class="fnname">borrow_mut</a>(&mut self) -> <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&mut </a>T</h4></section></summary><div class='docblock'>Mutably borrows from an owned value. <a href="https://doc.rust-lang.org/nightly/core/borrow/trait.BorrowMut.html#tymethod.borrow_mut">Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-From%3CT%3E-for-OpensslStringRef" class="impl has-srclink"><a class="srclink rightside" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#733">source</a><a href="#impl-From%3CT%3E-for-OpensslStringRef" class="anchor"></a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html" title="trait core::convert::From">From</a><T> for T</h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.from" class="method trait-impl has-srclink"><span class="rightside"><span class="since" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#736">source</a></span><a href="#method.from" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html#tymethod.from" class="fnname">from</a>(t: T) -> T</h4></section></summary><div class="docblock"><p>Returns the argument unchanged.</p> |
| </div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-Into%3CU%3E-for-OpensslStringRef" class="impl has-srclink"><a class="srclink rightside" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#717">source</a><a href="#impl-Into%3CU%3E-for-OpensslStringRef" class="anchor"></a><h3 class="code-header">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><U> for T<span class="where fmt-newline">where<br> U: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html" title="trait core::convert::From">From</a><T>,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.into" class="method trait-impl has-srclink"><span class="rightside"><span class="since" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#725">source</a></span><a href="#method.into" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html#tymethod.into" class="fnname">into</a>(self) -> U</h4></section></summary><div class="docblock"><p>Calls <code>U::from(self)</code>.</p> |
| <p>That is, this conversion is whatever the implementation of |
| <code><a href="https://doc.rust-lang.org/nightly/core/convert/trait.From.html" title="From">From</a><T> for U</code> chooses to do.</p> |
| </div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-ToString-for-OpensslStringRef" class="impl has-srclink"><a class="srclink rightside" href="https://doc.rust-lang.org/nightly/src/alloc/string.rs.html#2497">source</a><a href="#impl-ToString-for-OpensslStringRef" class="anchor"></a><h3 class="code-header">impl<T> <a class="trait" href="https://doc.rust-lang.org/nightly/alloc/string/trait.ToString.html" title="trait alloc::string::ToString">ToString</a> for T<span class="where fmt-newline">where<br> T: <a class="trait" href="https://doc.rust-lang.org/nightly/core/fmt/trait.Display.html" title="trait core::fmt::Display">Display</a> + ?<a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle method-toggle" open><summary><section id="method.to_string" class="method trait-impl has-srclink"><a class="srclink rightside" href="https://doc.rust-lang.org/nightly/src/alloc/string.rs.html#2503">source</a><a href="#method.to_string" class="anchor"></a><h4 class="code-header">default fn <a href="https://doc.rust-lang.org/nightly/alloc/string/trait.ToString.html#tymethod.to_string" class="fnname">to_string</a>(&self) -> <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/string/struct.String.html" title="struct alloc::string::String">String</a></h4></section></summary><div class='docblock'>Converts the given value to a <code>String</code>. <a href="https://doc.rust-lang.org/nightly/alloc/string/trait.ToString.html#tymethod.to_string">Read more</a></div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-TryFrom%3CU%3E-for-OpensslStringRef" class="impl has-srclink"><a class="srclink rightside" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#775">source</a><a href="#impl-TryFrom%3CU%3E-for-OpensslStringRef" class="anchor"></a><h3 class="code-header">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><U> for T<span class="where fmt-newline">where<br> U: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.Into.html" title="trait core::convert::Into">Into</a><T>,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle" open><summary><section id="associatedtype.Error-1" class="associatedtype trait-impl has-srclink"><a href="#associatedtype.Error-1" class="anchor"></a><h4 class="code-header">type <a href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error" class="associatedtype">Error</a> = <a class="enum" href="https://doc.rust-lang.org/nightly/core/convert/enum.Infallible.html" title="enum core::convert::Infallible">Infallible</a></h4></section></summary><div class='docblock'>The type returned in the event of a conversion error.</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.try_from" class="method trait-impl has-srclink"><span class="rightside"><span class="since" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#781">source</a></span><a href="#method.try_from" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#tymethod.try_from" class="fnname">try_from</a>(value: U) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><T, <T as <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><U>>::<a class="associatedtype" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>></h4></section></summary><div class='docblock'>Performs the conversion.</div></details></div></details><details class="rustdoc-toggle implementors-toggle"><summary><section id="impl-TryInto%3CU%3E-for-OpensslStringRef" class="impl has-srclink"><a class="srclink rightside" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#760">source</a><a href="#impl-TryInto%3CU%3E-for-OpensslStringRef" class="anchor"></a><h3 class="code-header">impl<T, U> <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html" title="trait core::convert::TryInto">TryInto</a><U> for T<span class="where fmt-newline">where<br> U: <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>,</span></h3></section></summary><div class="impl-items"><details class="rustdoc-toggle" open><summary><section id="associatedtype.Error" class="associatedtype trait-impl has-srclink"><a href="#associatedtype.Error" class="anchor"></a><h4 class="code-header">type <a href="https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html#associatedtype.Error" class="associatedtype">Error</a> = <U as <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>>::<a class="associatedtype" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a></h4></section></summary><div class='docblock'>The type returned in the event of a conversion error.</div></details><details class="rustdoc-toggle method-toggle" open><summary><section id="method.try_into" class="method trait-impl has-srclink"><span class="rightside"><span class="since" title="const unstable">const: <a href="https://github.com/rust-lang/rust/issues/88674" title="Tracking issue for const_convert">unstable</a></span> · <a class="srclink" href="https://doc.rust-lang.org/nightly/src/core/convert/mod.rs.html#766">source</a></span><a href="#method.try_into" class="anchor"></a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/nightly/core/convert/trait.TryInto.html#tymethod.try_into" class="fnname">try_into</a>(self) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a><U, <U as <a class="trait" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html" title="trait core::convert::TryFrom">TryFrom</a><T>>::<a class="associatedtype" href="https://doc.rust-lang.org/nightly/core/convert/trait.TryFrom.html#associatedtype.Error" title="type core::convert::TryFrom::Error">Error</a>></h4></section></summary><div class='docblock'>Performs the conversion.</div></details></div></details></div></section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="openssl" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
