145 lines
13 KiB
HTML
145 lines
13 KiB
HTML
<!DOCTYPE html>
|
|
<html lang="zh" dir="ltr" class="client-nojs" xmlns="http://www.w3.org/1999/xhtml" xml:lang="zh">
|
|
<head><meta http-equiv="x-ua-compatible" content="ie=edge">
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
|
<title>no-throw-input-iterator, no-throw-forward-iterator, no-throw-sentinel-for, no-throw-input-range, no-throw-forward-range</title>
|
|
<link rel="stylesheet" href="ext.css" />
|
|
<link rel="stylesheet" href="site_modules.css" />
|
|
</head>
|
|
<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_memory_ranges_nothrow_concepts skin-cppreference2 action-view cpp-navbar">
|
|
<div id="cpp-content-base">
|
|
<div id="content"><a id="top"></a>
|
|
<h1 id="firstHeading" class="firstHeading"><i>no-throw-input-iterator</i>, <i>no-throw-forward-iterator</i>, <i>no-throw-sentinel-for</i>, <i>no-throw-input-range</i>, <i>no-throw-forward-range</i></h1>
|
|
<div id="bodyContent">
|
|
<div id="contentSub"><span class="subpages">< <a href="cpp.html">cpp</a>‎ | <a href="cpp-memory.html">memory</a></span></div>
|
|
<div id="mw-content-text" lang="zh" dir="ltr" class="mw-content-ltr" xml:lang="zh">
|
|
<table class="t-dcl-begin">
|
|
<tbody>
|
|
<tr class="t-dcl t-since-cxx20">
|
|
<td>
|
|
<div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1"><</span><span class="kw1">class</span> I<span class="sy1">></span><br /></span>
|
|
<p>concept no<span class="sy2">-</span>throw<span class="sy2">-</span>input<span class="sy2">-</span>iterator <span class="sy1">=</span> <span class="co1">// 仅用于阐释</span><br />
|
|
std<span class="sy4">::</span><span class="me2">input_iterator</span><span class="sy1"><</span>I<span class="sy1">></span> <span class="sy3">&&</span><br />
|
|
<a href="cpp-types-is_lvalue_reference.html"><span class="kw465">std::<span class="me2">is_lvalue_reference_v</span></span></a><span class="sy1"><</span>std<span class="sy4">::</span><span class="me2">iter_reference_t</span><span class="sy1"><</span>I<span class="sy1">>></span> <span class="sy3">&&</span><br /></p>
|
|
std<span class="sy4">::</span><span class="me2">same_as</span><span class="sy1"><</span>std<span class="sy4">::</span><span class="me2">remove_cvref_t</span><span class="sy1"><</span>std<span class="sy4">::</span><span class="me2">iter_reference_t</span><span class="sy1"><</span>I<span class="sy1">>></span>, std<span class="sy4">::</span><span class="me2">iter_value_t</span><span class="sy1"><</span>I<span class="sy1">>></span><span class="sy4">;</span></div>
|
|
</td>
|
|
<td>(1)</td>
|
|
<td><span class="t-mark-rev t-since-cxx20">(C++20 起)</span></td>
|
|
</tr>
|
|
<tr class="t-dcl t-since-cxx20">
|
|
<td>
|
|
<div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1"><</span><span class="kw1">class</span> I<span class="sy1">></span><br /></span>
|
|
<p>concept no<span class="sy2">-</span>throw<span class="sy2">-</span>forward<span class="sy2">-</span>iterator <span class="sy1">=</span> <span class="co1">// 仅用于阐释</span><br />
|
|
no<span class="sy2">-</span>throw<span class="sy2">-</span>input<span class="sy2">-</span>iterator<span class="sy1"><</span>I<span class="sy1">></span> <span class="sy3">&&</span><br />
|
|
std<span class="sy4">::</span><span class="me2">forward_iterator</span><span class="sy1"><</span>I<span class="sy1">></span> <span class="sy3">&&</span><br /></p>
|
|
no<span class="sy2">-</span>throw<span class="sy2">-</span>sentinel<span class="sy2">-</span><span class="kw1">for</span><span class="sy1"><</span>I, I<span class="sy1">></span><span class="sy4">;</span></div>
|
|
</td>
|
|
<td>(2)</td>
|
|
<td><span class="t-mark-rev t-since-cxx20">(C++20 起)</span></td>
|
|
</tr>
|
|
<tr class="t-dcl t-since-cxx20">
|
|
<td>
|
|
<div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1"><</span><span class="kw1">class</span> S, <span class="kw1">class</span> I<span class="sy1">></span><br />
|
|
concept no<span class="sy2">-</span>throw<span class="sy2">-</span>sentinel<span class="sy2">-</span><span class="kw1">for</span> <span class="sy1">=</span> std<span class="sy4">::</span><span class="me2">sentinel_for</span><span class="sy1"><</span>S, I<span class="sy1">></span><span class="sy4">;</span> <span class="co1">// 仅用于阐释</span></span></div>
|
|
</td>
|
|
<td>(3)</td>
|
|
<td><span class="t-mark-rev t-since-cxx20">(C++20 起)</span></td>
|
|
</tr>
|
|
<tr class="t-dcl t-since-cxx20">
|
|
<td>
|
|
<div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1"><</span><span class="kw1">class</span> R<span class="sy1">></span><br /></span>
|
|
<p>concept no<span class="sy2">-</span>throw<span class="sy2">-</span>input<span class="sy2">-</span>range <span class="sy1">=</span> <span class="co1">// 仅用于阐释</span><br />
|
|
ranges<span class="sy4">::</span><span class="me2">range</span><span class="sy1"><</span>R<span class="sy1">></span> <span class="sy3">&&</span><br />
|
|
no<span class="sy2">-</span>throw<span class="sy2">-</span>input<span class="sy2">-</span>iterator<span class="sy1"><</span>ranges<span class="sy4">::</span><span class="me2">iterator_t</span><span class="sy1"><</span>R<span class="sy1">>></span> <span class="sy3">&&</span><br /></p>
|
|
no<span class="sy2">-</span>throw<span class="sy2">-</span>sentinel<span class="sy2">-</span><span class="kw1">for</span><span class="sy1"><</span>ranges<span class="sy4">::</span><span class="me2">sentinel_t</span><span class="sy1"><</span>R<span class="sy1">></span>, ranges<span class="sy4">::</span><span class="me2">iterator_t</span><span class="sy1"><</span>R<span class="sy1">>></span><span class="sy4">;</span></div>
|
|
</td>
|
|
<td>(4)</td>
|
|
<td><span class="t-mark-rev t-since-cxx20">(C++20 起)</span></td>
|
|
</tr>
|
|
<tr class="t-dcl t-since-cxx20">
|
|
<td>
|
|
<div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1"><</span><span class="kw1">class</span> R<span class="sy1">></span><br /></span>
|
|
<p>concept no<span class="sy2">-</span>throw<span class="sy2">-</span>forward<span class="sy2">-</span>range <span class="sy1">=</span> <span class="co1">// 仅用于阐释</span><br />
|
|
no<span class="sy2">-</span>throw<span class="sy2">-</span>input<span class="sy2">-</span>range<span class="sy1"><</span>R<span class="sy1">></span> <span class="sy3">&&</span><br /></p>
|
|
no<span class="sy2">-</span>throw<span class="sy2">-</span>forward<span class="sy2">-</span>iterator<span class="sy1"><</span>ranges<span class="sy4">::</span><span class="me2">iterator_t</span><span class="sy1"><</span>R<span class="sy1">>></span><span class="sy4">;</span></div>
|
|
</td>
|
|
<td>(5)</td>
|
|
<td><span class="t-mark-rev t-since-cxx20">(C++20 起)</span></td>
|
|
</tr>
|
|
<tr class="t-dcl-sep">
|
|
<td></td>
|
|
<td></td>
|
|
<td></td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
<p>这些仅用于阐释的概念指定迭代器、哨位和范围上算法所要求的操作均不抛异常。</p>
|
|
<div class="t-li1"><span class="t-li">1)</span> <code><i>no-throw-input-iterator</i></code> 概念要求解引用迭代器产生左值，类似 <a href="cpp-iterator-contiguous_iterator.html"><code>contiguous_iterator</code></a> 与<a href="cpp-named_req-ForwardIterator.html"><span style="font-style:italic">老式向前迭代器</span> <span style="font-family: Georgia, 'DejaVu Serif', serif; font-style:italic">(LegacyForwardIterator)</span></a> 。</div>
|
|
<h3><span class="mw-headline" id=".E8.AF.AD.E4.B9.89.E8.A6.81.E6.B1.82">语义要求</span></h3>
|
|
<p>类似所有标准概念，此处列出的每个概念得以实现，仅若其所蕴含的所有概念均被实现。</p>
|
|
<div class="t-li1"><span class="t-li">1)</span> 类型 <code>I</code> 实现 <code><i>no-throw-input-iterator</i></code> ，仅若自增、复制构造、移动构造、复制赋值、移动赋值或通过合法迭代器的间接不抛出异常。</div>
|
|
<div class="t-li1"><span class="t-li">3)</span> 类型 <code>S</code> 与 <code>I</code> 实现 <code><i>no-throw-sentinel-for</i></code> ，仅若复制构造、移动构造、复制赋值、移动赋值或类型 <code>I</code> 与 <code>S</code> 的合法值间的比较不抛异常。</div>
|
|
<div class="t-li1"><span class="t-li">4)</span> 类型 <code>R</code> 实现 <code><i>no-throw-input-range</i></code> ，仅若在 <code>R</code> 类型对象上调用 <span class="t-c"><span class="mw-geshi cpp source-cpp">ranges<span class="sy4">::</span><span class="me2">begin</span></span></span> 与 <span class="t-c"><span class="mw-geshi cpp source-cpp">ranges<span class="sy4">::</span><span class="me2">end</span></span></span> 不抛异常。</div>
|
|
<h3><span class="mw-headline" id=".E6.B3.A8.E8.A7.A3">注解</span></h3>
|
|
<p>这些概念允许迭代器和哨位上的某些操作抛出异常，例如非法值上的操作。</p>
|
|
<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">参阅</span></h3>
|
|
<table class="t-dsc-begin">
|
|
<tr class="t-dsc">
|
|
<td>
|
|
<div class="t-dsc-member-div">
|
|
<div><a href="cpp-iterator-input_iterator.html"><span class="t-lines"><span>input_iterator</span></span></a></div>
|
|
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
|
|
</div>
|
|
</td>
|
|
<td>指定类型为输入迭代器，即可读取其所引用的值，且可前/后自增<br />
|
|
<span class="t-mark">(概念)</span></td>
|
|
</tr>
|
|
<tr class="t-dsc">
|
|
<td>
|
|
<div class="t-dsc-member-div">
|
|
<div><a href="cpp-iterator-forward_iterator.html"><span class="t-lines"><span>forward_iterator</span></span></a></div>
|
|
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
|
|
</div>
|
|
</td>
|
|
<td>指定 <a href="cpp-iterator-input_iterator.html"><code>input_iterator</code></a> 为向前迭代器，支持相等比较与多趟操作<br />
|
|
<span class="t-mark">(概念)</span></td>
|
|
</tr>
|
|
<tr class="t-dsc">
|
|
<td>
|
|
<div class="t-dsc-member-div">
|
|
<div><a href="cpp-iterator-sentinel_for.html"><span class="t-lines"><span>sentinel_for</span></span></a></div>
|
|
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
|
|
</div>
|
|
</td>
|
|
<td>指定类型为某个 <a href="cpp-iterator-input_or_output_iterator.html"><code>input_or_output_iterator</code></a> 类型的哨位类型<br />
|
|
<span class="t-mark">(概念)</span></td>
|
|
</tr>
|
|
<tr class="t-dsc">
|
|
<td>
|
|
<div class="t-dsc-member-div">
|
|
<div><a href="cpp-ranges-input_range.html"><span class="t-lines"><span>ranges::input_range</span></span></a></div>
|
|
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
|
|
</div>
|
|
</td>
|
|
<td>指定范围的迭代器类型满足 <a href="cpp-iterator-input_iterator.html"><code>input_iterator</code></a><br />
|
|
<span class="t-mark">(概念)</span></td>
|
|
</tr>
|
|
<tr class="t-dsc">
|
|
<td>
|
|
<div class="t-dsc-member-div">
|
|
<div><a href="cpp-ranges-forward_range.html"><span class="t-lines"><span>ranges::forward_range</span></span></a></div>
|
|
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
|
|
</div>
|
|
</td>
|
|
<td>指定范围的迭代器类型满足 <a href="cpp-iterator-forward_iterator.html"><code>forward_iterator</code></a><br />
|
|
<span class="t-mark">(概念)</span></td>
|
|
</tr>
|
|
</table>
|
|
</div>
|
|
<div class="visualClear"></div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
</body>
|
|
</html>
|