-
Notifications
You must be signed in to change notification settings - Fork 1
Expand file tree
/
Copy pathmake_format_args.html
More file actions
363 lines (301 loc) · 25.3 KB
/
Copy pathmake_format_args.html
File metadata and controls
363 lines (301 loc) · 25.3 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
<!doctype html>
<html class="cpprefjp" lang="ja" itemscope="" itemtype="http://schema.org/WebPage">
<head>
<!-- Google tag (gtag.js) -->
<script async src="https://www.googletagmanager.com/gtag/js?id=G-NXNBNVBTJS"></script>
<script>
window.dataLayer = window.dataLayer || [];
function gtag(){dataLayer.push(arguments);}
gtag('js', new Date());
gtag('config', 'G-NXNBNVBTJS');
</script>
<meta charset="UTF-8">
<title>std::make_format_args - cpprefjp C++日本語リファレンス</title>
<meta name="viewport" content="width=device-width,initial-scale=1">
<meta name="keywords" content="
C++,標準ライブラリ,リファレンス,ドキュメント,STL,std,format,function template,std,cpp20
">
<meta name="title" content="std::make_format_args - cpprefjp C++日本語リファレンス" />
<meta itemprop="name" content="std::make_format_args - cpprefjp C++日本語リファレンス" />
<meta property="og:title" content="std::make_format_args - cpprefjp C++日本語リファレンス" />
<meta property="og:url" content="https://cpprefjp.github.io/reference/format/make_format_args.html" />
<meta property="og:site_name" content="cpprefjp - C++日本語リファレンス" />
<meta property="og:type" content="article" />
<meta property="og:description" content="可変長引数の型を消去して、[`basic_format_arg`](basic_format_arg.md)の列に変換する。" />
<meta name="twitter:card" content="summary" />
<meta name="twitter:title" content="std::make_format_args - cpprefjp C++日本語リファレンス" />
<meta name="twitter:url" content="https://cpprefjp.github.io/reference/format/make_format_args.html" />
<meta name="twitter:description" content="可変長引数の型を消去して、[`basic_format_arg`](basic_format_arg.md)の列に変換する。" />
<link rel="alternate" type="application/atom+xml" title="Atom" href="https://cpprefjp.github.io/rss.xml" />
<link rel="apple-touch-icon" sizes="180x180" href="../../static/favicons/apple-touch-icon.png?cachebust=557cd0469f26f0f797224f46d1b6e764266f07cc">
<link rel="icon" type="image/png" sizes="32x32" href="../../static/favicons/favicon-32x32.png?cachebust=557cd0469f26f0f797224f46d1b6e764266f07cc">
<link rel="icon" type="image/png" sizes="16x16" href="../../static/favicons/favicon-16x16.png?cachebust=557cd0469f26f0f797224f46d1b6e764266f07cc">
<link rel="manifest" href="../../manifest.json?cachebust=557cd0469f26f0f797224f46d1b6e764266f07cc">
<meta name="theme-color" content="#f5f8fc">
<link rel="stylesheet" href="../../static/pygments/default.css?cachebust=557cd0469f26f0f797224f46d1b6e764266f07cc">
<!-- <link rel="stylesheet" href="../../static/css/root.css"> -->
<link href="../../static/kunai/css/kunai-stage-0.css?cachebust=557cd0469f26f0f797224f46d1b6e764266f07cc" rel="stylesheet">
<link href="../../static/kunai/css/kunai-stage-1.css?cachebust=557cd0469f26f0f797224f46d1b6e764266f07cc" rel="stylesheet">
<link href="../../static/kunai/css/kunai-stage-2.css?cachebust=557cd0469f26f0f797224f46d1b6e764266f07cc" rel="stylesheet">
<link href="../../static/kunai/css/kunai-stage-3.css?cachebust=557cd0469f26f0f797224f46d1b6e764266f07cc" rel="stylesheet">
<script type="text/javascript" src="../../static/kunai/js/kunai-vendor.js?cachebust=557cd0469f26f0f797224f46d1b6e764266f07cc"></script>
<script type="text/javascript" src="../../static/kunai/js/kunai.js?cachebust=557cd0469f26f0f797224f46d1b6e764266f07cc"></script>
<script type="text/javascript">
document.addEventListener('DOMContentLoaded', function() {
var kn = new Kunai;
kn.cpprefjp();
});
</script>
</head>
<body>
<header data-kunai-mdinfo="{"meta": {"header": ["format"], "id-type": ["function template"], "namespace": ["std"], "cpp": ["cpp20"]}, "sources": [{"id": "e3410646254d0c44b8ea883fbd189580b3d37590", "source": "#include <iostream>\n#include <format>\n#include <string>\n\nint main() {\n std::string fmt = \"0x{:x} 0b{:04b}\";\n int m = 10, n = 6;\n std::string s = std::vformat(fmt, std::make_format_args(m, n));\n std::cout << s << std::endl;\n}\n"}], "page_id": ["reference", "format", "make_format_args"]}">
<nav class="navbar navbar-default" role="navigation">
<div class="container-fluid">
<div class="navbar-header">
<button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar-collapse">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="../../index.html">
<div class="title-wrapper clearfix">
<div class="title">cpprefjp - C++日本語リファレンス</div>
</div>
</a>
</div>
<div class="collapse navbar-collapse" id="navbar-collapse">
<ul class="nav navbar-nav navbar-right">
<li>
<div class="google-search">
<script>
(function() {
var cx = '013316413321391058734:ji_u66hl7hq';
var gcse = document.createElement('script');
gcse.type = 'text/javascript';
gcse.async = true;
gcse.src = (document.location.protocol == 'https:' ? 'https:' : 'http:') +
'//www.google.com/cse/cse.js?cx=' + cx;
var s = document.getElementsByTagName('script')[0];
s.parentNode.insertBefore(gcse, s);
})();
</script>
<div class="gcse-search"></div>
</div>
</li>
<li>
<a href="https://github.com/cpprefjp/site">GitHub Project</a>
</li>
</ul>
</div>
</div>
</nav>
</header>
<main id="main" role="main">
<div class="container-fluid">
<div class="row">
<div class="col-sm-9 col-sm-push-3" itemscope itemtype="http://schema.org/Article">
<div class="row">
<div class="col-sm-12 google-search-result">
<gcse:searchresults></gcse:searchresults>
</div>
</div>
<div class="row">
<div class="col-sm-12 content-header">
<ol class="breadcrumb">
<li itemscope itemtype="http://www.schema.org/SiteNavigationElement">
<span>
<a href="../../index.html" itemprop="url">
<i class="fa fa-fw fa-home"></i>
</a>
</span>
</li>
<li itemscope itemtype="http://www.schema.org/SiteNavigationElement">
<span>
<a href="../../reference.html" itemprop="url">
<span itemprop="name">リファレンス</span>
</a>
</span>
</li>
<li itemscope itemtype="http://www.schema.org/SiteNavigationElement">
<span>
<a href="../../reference/format.html" itemprop="url">
<span itemprop="name">format</span>
</a>
</span>
</li>
<li class="active" itemscope itemtype="http://www.schema.org/SiteNavigationElement">
<span>
<span itemprop="name">make_format_args</span>
</span>
</li>
</ol>
<div class="crsearch"></div>
</div>
</div>
<div class="row">
<div class="col-sm-12 edit-button">
<p class="text-right"><small>
最終更新日時:
<time itemprop="datePublished" class="js-local-time"
datetime="2026-07-22T16:08:23+09:00">
2026年07月22日 16時08分23秒 (JST)
</time>
<br/>
<span itemprop="author" itemscope itemtype="http://schema.org/Person">
<span itemprop="name">rotarymars</span>
</span>
が更新
</small></p>
<script>
(function () {
// 最終更新日時を閲覧者のローカルタイムゾーンで表示し直す (issue #53 の正規化)。
// JS が無効な環境ではサーバ生成の JST 表記がそのまま残る。
function pad(n) { return (n < 10 ? '0' : '') + n; }
var els = document.querySelectorAll('time.js-local-time[datetime]');
for (var i = 0; i < els.length; i++) {
var el = els[i];
var d = new Date(el.getAttribute('datetime'));
if (isNaN(d.getTime())) { continue; }
var tz = '';
try {
var parts = new Intl.DateTimeFormat(undefined, { timeZoneName: 'short' }).formatToParts(d);
for (var j = 0; j < parts.length; j++) {
if (parts[j].type === 'timeZoneName') { tz = parts[j].value; break; }
}
} catch (e) {}
el.textContent = d.getFullYear() + '年' + pad(d.getMonth() + 1) + '月' + pad(d.getDate()) + '日 '
+ pad(d.getHours()) + '時' + pad(d.getMinutes()) + '分' + pad(d.getSeconds()) + '秒'
+ (tz ? ' (' + tz + ')' : '');
}
})();
</script>
<p class="text-right">
<a class="history" target="_blank" href="https://github.com/cpprefjp/site/commits/master/reference/format/make_format_args.md">
<span class="fa fa-fw fa-clock-o fa-flip-horizontal"></span>履歴
</a>
<a class="edit" target="_blank" href="https://github.com/cpprefjp/site/edit/master/reference/format/make_format_args.md">
<span class="fa fa-fw fa-pencil"></span>編集
</a>
</p>
</div>
</div>
<div class="row">
<div class="col-sm-12 content-body">
<div class="identifier-type">function template</div><div class="header"><format></div><h1 itemprop="name"><span class="namespace" title="namespace std">std::</span><span class="token">make_format_args</span><span class="cpp cpp20" title="C++20で追加">(C++20)</span></h1>
<div itemprop="articleBody"><p><div class="codehilite"><pre><span></span><code><span class="k">namespace</span><span class="w"> </span><span class="nn">std</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="k">template</span><span class="o"><</span><span class="k">class</span><span class="w"> </span><span class="nc">Context</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">format_context</span><span class="p">,</span><span class="w"> </span><span class="k">class</span><span class="p">...</span><span class="w"> </span><span class="n">Args</span><span class="o">></span>
<span class="w"> </span><span class="n"><i>format_arg_store</i></span><span class="o"><</span><span class="n">Context</span><span class="p">,</span><span class="w"> </span><span class="n">Args</span><span class="p">...</span><span class="o">></span>
<span class="w"> </span><span class="n">make_format_args</span><span class="p">(</span><span class="n">Args</span><span class="o">&</span><span class="p">...</span><span class="w"> </span><span class="n">args</span><span class="p">);</span><span class="w"> </span><span class="c1">// (1) C++20</span>
<span class="w"> </span><span class="k">template</span><span class="o"><</span><span class="k">class</span><span class="w"> </span><span class="nc">Context</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">format_context</span><span class="p">,</span><span class="w"> </span><span class="k">class</span><span class="p">...</span><span class="w"> </span><span class="n">Args</span><span class="o">></span>
<span class="w"> </span><span class="k">constexpr</span><span class="w"> </span><span class="n"><i>format_arg_store</i></span><span class="o"><</span><span class="n">Context</span><span class="p">,</span><span class="w"> </span><span class="n">Args</span><span class="p">...</span><span class="o">></span>
<span class="w"> </span><span class="n">make_format_args</span><span class="p">(</span><span class="n">Args</span><span class="o">&</span><span class="p">...</span><span class="w"> </span><span class="n">args</span><span class="p">);</span><span class="w"> </span><span class="c1">// (1) C++26</span>
<span class="w"> </span><span class="k">template</span><span class="o"><</span><span class="k">class</span><span class="p">...</span><span class="w"> </span><span class="n">Args</span><span class="o">></span>
<span class="w"> </span><span class="n"><i>format_arg_store</i></span><span class="o"><</span><span class="n"><a href="basic_format_context.html">wformat_context</a></span><span class="p">,</span><span class="w"> </span><span class="n">Args</span><span class="p">...</span><span class="o">></span>
<span class="w"> </span><span class="n">make_wformat_args</span><span class="p">(</span><span class="n">Args</span><span class="o">&</span><span class="p">...</span><span class="w"> </span><span class="n">args</span><span class="p">);</span><span class="w"> </span><span class="c1">// (2) C++20</span>
<span class="w"> </span><span class="k">template</span><span class="o"><</span><span class="k">class</span><span class="p">...</span><span class="w"> </span><span class="n">Args</span><span class="o">></span>
<span class="w"> </span><span class="k">constexpr</span><span class="w"> </span><span class="n"><i>format_arg_store</i></span><span class="o"><</span><span class="n"><a href="basic_format_context.html">wformat_context</a></span><span class="p">,</span><span class="w"> </span><span class="n">Args</span><span class="p">...</span><span class="o">></span>
<span class="w"> </span><span class="n">make_wformat_args</span><span class="p">(</span><span class="n">Args</span><span class="o">&</span><span class="p">...</span><span class="w"> </span><span class="n">args</span><span class="p">);</span><span class="w"> </span><span class="c1">// (2) C++26</span>
<span class="p">}</span>
</code></pre></div>
</p>
<h2>概要</h2>
<p>可変長引数の型を消去して、<code><a href="basic_format_arg.html">basic_format_arg</a></code>の列に変換する。
<a class="cpprefjp-defined-word" data-desc="関数呼び出し式の評価結果となるオブジェクト・値">戻り値</a>の型 <em><code>format_arg_store</code></em> は便宜上次の通り定義されるが、その型名は規格に含まれない。</p>
<p><div class="codehilite"><pre><span></span><code><span class="k">namespace</span><span class="w"> </span><span class="nn">std</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="k">template</span><span class="o"><</span><span class="k">class</span><span class="w"> </span><span class="nc">Context</span><span class="p">,</span><span class="w"> </span><span class="k">class</span><span class="p">...</span><span class="w"> </span><span class="n">Args</span><span class="o">></span>
<span class="w"> </span><span class="k">struct</span><span class="w"> </span><span class="nc"><i>format_arg_store</i></span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="c1">// exposition only</span>
<span class="w"> </span><span class="n"><a href="../array/array.html">array</a></span><span class="o"><</span><span class="n"><a href="basic_format_arg.html">basic_format_arg</a></span><span class="o"><</span><span class="n">Context</span><span class="o">></span><span class="p">,</span><span class="w"> </span><span class="k">sizeof</span><span class="p">...(</span><span class="n">Args</span><span class="p">)</span><span class="o">></span><span class="w"> </span><span class="n">args</span><span class="p">;</span>
<span class="w"> </span><span class="p">};</span>
<span class="p">}</span>
</code></pre></div>
</p>
<p><code><a href="basic_format_args.html">basic_format_args</a></code>は<code>format_arg_store</code>から構築できる。
<code>make_format_args</code>の結果はただちに<code>basic_format_args</code>へ変換するのが意図された使い方である。</p>
<p><div class="codehilite"><pre><span></span><code><span class="k">template</span><span class="o"><</span><span class="k">class</span><span class="p">...</span><span class="w"> </span><span class="n">Args</span><span class="o">></span>
<span class="n">string</span><span class="w"> </span><span class="n">format</span><span class="p">(</span><span class="n"><a href="../string_view/basic_string_view.html">string_view</a></span><span class="w"> </span><span class="n">fmt</span><span class="p">,</span><span class="w"> </span><span class="k">const</span><span class="w"> </span><span class="n">Args</span><span class="o">&</span><span class="p">...</span><span class="w"> </span><span class="n">args</span><span class="p">)</span>
<span class="p">{</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">vformat</span><span class="p">(</span><span class="n">fmt</span><span class="p">,</span><span class="w"> </span><span class="p">{</span><span class="n">make_format_args</span><span class="p">(</span><span class="n">args</span><span class="p">...)});</span><span class="w"> </span><span class="c1">// format_arg_store から format_args へ暗黙変換</span>
<span class="p">}</span>
</code></pre></div>
</p>
<h2><a class="cpprefjp-defined-word" data-desc="関数等の意味論を構成する要素の1つ。Preconditions。関数呼び出し時に満たされていると関数が想定する条件。満たさなければ未定義の動作。契約属性の`[[expects]]`に相当">事前条件</a></h2>
<p>すべての引数の型<code>Ti</code>について<code>Context::formatter_type<Ti></code>が<code>Formatter</code>要件を満たすこと。</p>
<h2><a class="cpprefjp-defined-word" data-desc="関数呼び出し式の評価結果となるオブジェクト・値">戻り値</a></h2>
<h3>(1)</h3>
<p><div class="codehilite"><pre><span></span><code><span class="k">return</span><span class="w"> </span><span class="p">{</span><span class="n"><a href="basic_format_arg/op_constructor.html">basic_format_arg</a></span><span class="o"><</span><span class="n">Context</span><span class="o">></span><span class="p">(</span><span class="n">args</span><span class="p">)...}</span>
</code></pre></div>
</p>
<h3>(2)</h3>
<p><div class="codehilite"><pre><span></span><code><span class="k">return</span><span class="w"> </span><span class="n">make_format_args</span><span class="o"><</span><span class="n"><a href="basic_format_context.html">wformat_context</a></span><span class="o">></span><span class="p">(</span><span class="n">args</span><span class="p">...);</span>
</code></pre></div>
</p>
<h2>例</h2>
<p><div class="yata" id="e3410646254d0c44b8ea883fbd189580b3d37590"><div class="codehilite"><pre><span></span><code><span class="cp">#include <a href="../iostream.html"><iostream></a></span>
<span class="cp">#include <a href="../format.html"><format></a></span>
<span class="cp">#include <a href="../string.html"><string></a></span>
<span class="kt">int</span><span class="w"> </span><span class="nf">main</span><span class="p">()</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="n"><a href="../string/basic_string.html">std::string</a></span><span class="w"> </span><span class="n">fmt</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">"0x{:x} 0b{:04b}"</span><span class="p">;</span>
<span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">m</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">10</span><span class="p">,</span><span class="w"> </span><span class="n">n</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">6</span><span class="p">;</span>
<span class="w"> </span><span class="n"><a href="../string/basic_string.html">std::string</a></span><span class="w"> </span><span class="n">s</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n"><a href="vformat.html">std::vformat</a></span><span class="p">(</span><span class="n">fmt</span><span class="p">,</span><span class="w"> </span><span class="n"><span style="color:#ff0000">std::make_format_args</span></span><span class="p">(</span><span class="n">m</span><span class="p">,</span><span class="w"> </span><span class="n">n</span><span class="p">));</span>
<span class="w"> </span><span class="n"><a href="../iostream/cout.html">std::cout</a></span><span class="w"> </span><span class="o"><<</span><span class="w"> </span><span class="n">s</span><span class="w"> </span><span class="o"><<</span><span class="w"> </span><span class="n"><a href="../ostream/endl.html">std::endl</a></span><span class="p">;</span>
<span class="p">}</span>
</code></pre></div>
</div></p>
<h3>出力</h3>
<p><pre><code>0xa 0b0110
</code></pre></p>
<h2>実装例</h2>
<p><div class="codehilite"><pre><span></span><code><span class="k">namespace</span><span class="w"> </span><span class="nn">std</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="k">template</span><span class="o"><</span><span class="k">class</span><span class="w"> </span><span class="nc">Context</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">format_context</span><span class="p">,</span><span class="w"> </span><span class="k">class</span><span class="p">...</span><span class="w"> </span><span class="n">Args</span><span class="o">></span>
<span class="w"> </span><span class="n">format_arg_store</span><span class="o"><</span><span class="n">Context</span><span class="p">,</span><span class="w"> </span><span class="n">Args</span><span class="p">...</span><span class="o">></span><span class="w"> </span><span class="n">make_format_args</span><span class="p">(</span><span class="k">const</span><span class="w"> </span><span class="n">Args</span><span class="o">&</span><span class="p">...</span><span class="w"> </span><span class="n">args</span><span class="p">)</span>
<span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="p">{</span><span class="n"><a href="basic_format_arg/op_constructor.html">basic_format_arg</a></span><span class="o"><</span><span class="n">Context</span><span class="o">></span><span class="p">(</span><span class="n">args</span><span class="p">)...}</span>
<span class="w"> </span><span class="p">}</span>
<span class="w"> </span><span class="k">template</span><span class="o"><</span><span class="k">class</span><span class="p">...</span><span class="w"> </span><span class="n">Args</span><span class="o">></span>
<span class="w"> </span><span class="n">format_arg_store</span><span class="o"><</span><span class="n"><a href="basic_format_context.html">wformat_context</a></span><span class="p">,</span><span class="w"> </span><span class="n">Args</span><span class="p">...</span><span class="o">></span><span class="w"> </span><span class="n">make_wformat_args</span><span class="p">(</span><span class="k">const</span><span class="w"> </span><span class="n">Args</span><span class="o">&</span><span class="p">...</span><span class="w"> </span><span class="n">args</span><span class="p">)</span>
<span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">make_format_args</span><span class="o"><</span><span class="n"><a href="basic_format_context.html">wformat_context</a></span><span class="o">></span><span class="p">(</span><span class="n">args</span><span class="p">...);</span>
<span class="w"> </span><span class="p">}</span>
<span class="p">}</span>
</code></pre></div>
</p>
<h2>バージョン</h2>
<h3>言語</h3>
<ul>
<li>C++20</li>
</ul>
<h3>処理系</h3>
<ul>
<li><a href="../../implementation.html#clang">Clang</a>: 17</li>
<li><a href="../../implementation.html#gcc">GCC</a>: 13</li>
<li><a href="../../implementation.html#visual_cpp">Visual C++</a>: ??</li>
</ul>
<h2>参照</h2>
<ul>
<li><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2019/p0645r10.html" target="_blank">P0645R10 Text Formatting</a></li>
<li><a href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p2418r2.html" target="_blank">P2418R2 Add support for <code>std::generator</code>-like types to <code>std::format</code></a></li>
<li><a href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2023/p2905r2.html" target="_blank">P2905R2 Runtime format strings</a><ul>
<li>C++23 発効後の DR として、引数を非 <code>const</code> 左辺値参照とすることで、一時オブジェクトを渡すことによる寿命切れオブジェクトの参照を回避する変更が提案された。これは C++20 まで遡及適用された。</li>
</ul>
</li>
</ul></div>
</div>
</div>
</div>
<div id="sidebar" class="col-sm-3 col-sm-pull-9">
</div>
</div>
</div>
</main>
<footer class="footer navbar navbar-default">
<div class="container-fluid">
<p><small>
本サイトの情報は、
<a href="https://creativecommons.org/licenses/by/4.0/deed.ja" rel="nofollow">クリエイティブ・コモンズ 表示 4.0 非移植 ライセンス(CC BY)</a>
の下に提供されています。
</small></p>
</div>
</footer>
</body>
</html>