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Merge pull request #291 from franzpoeschel/namespace-versioning Use an inline namespace to distinguish emitted symbols by version numbers e4051f77d73b7135df61f6442ddaa7f58468f253
2025-05-17 07:21:19 +00:00
<!doctype html><html lang=ja dir=ltr><head><meta charset=UTF-8><meta name=viewport content="width=device-width,initial-scale=1"><meta name=description content='
_tomlリテラル
#
""_tomlリテラルによって、TOMLファイルをその場でフォーマットできます。
#include <toml.hpp>
int main()
{
using namespace toml::literals::toml_literals;
const auto v = "a = 42"_toml;
assert(v.at("a").as_integer() == 42);
return 0;
}
改行を含む場合、生文字列リテラルが便利です。
#include <toml.hpp>
int main()
{
using namespace toml::literals::toml_literals;
const auto v = R"(
a = 42
b = "foo"
)"_toml;
assert(v.at("a").as_integer() == 42);
assert(v.at("b").as_string() == "foo");
return 0;
}
値が単体で書かれていた場合、その値が返されます。
#include <toml.hpp>
int main()
{
using namespace toml::literals::toml_literals;
const auto a = "42"_toml;
const auto b = "12:34:56"_toml;
assert(v.at("a").as_integer() == 42);
assert(v.at("b").as_local_time().hour == 12);
assert(v.at("b").as_local_time().minute == 34);
assert(v.at("b").as_local_time().second == 56);
return 0;
}
TOMLは数値のみからなるキーを許可しています。
よって、[1]はテーブル名として合法です。'><meta name=theme-color media="(prefers-color-scheme: light)" content="#ffffff"><meta name=theme-color media="(prefers-color-scheme: dark)" content="#343a40"><meta name=color-scheme content="light dark"><meta property="og:url" content="https://toruniina.github.io/toml11/ja/docs/features/literal/"><meta property="og:site_name" content="toml11"><meta property="og:title" content="toml literal"><meta property="og:description" content='_tomlリテラル # ""_tomlリテラルによって、TOMLファイルをその場でフォーマットできます。
#include <toml.hpp> int main() { using namespace toml::literals::toml_literals; const auto v = "a = 42"_toml; assert(v.at("a").as_integer() == 42); return 0; } 改行を含む場合、生文字列リテラルが便利です。
#include <toml.hpp> int main() { using namespace toml::literals::toml_literals; const auto v = R"( a = 42 b = "foo" )"_toml; assert(v.at("a").as_integer() == 42); assert(v.at("b").as_string() == "foo"); return 0; } 値が単体で書かれていた場合、その値が返されます。
#include <toml.hpp> int main() { using namespace toml::literals::toml_literals; const auto a = "42"_toml; const auto b = "12:34:56"_toml; assert(v.at("a").as_integer() == 42); assert(v.at("b").as_local_time().hour == 12); assert(v.at("b").as_local_time().minute == 34); assert(v.at("b").as_local_time().second == 56); return 0; } TOMLは数値のみからなるキーを許可しています。 よって、[1]はテーブル名として合法です。'><meta property="og:locale" content="ja"><meta property="og:type" content="article"><meta property="article:section" content="docs"><title>toml literal | toml11</title>
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</label><strong>toml literal</strong>
<label for=toc-control><img src=/toml11/svg/toc.svg class=book-icon alt="Table of Contents"></label></div><aside class="hidden clearfix"><nav id=TableOfContents><ul><li><a href=#_tomlリテラル><code>_toml</code>リテラル</a></li></ul></nav></aside></header><article class="markdown book-article"><h1 id=_tomlリテラル><code>_toml</code>リテラル
<a class=anchor href=#_toml%e3%83%aa%e3%83%86%e3%83%a9%e3%83%ab>#</a></h1><p><code>""_toml</code>リテラルによって、TOMLファイルをその場でフォーマットできます。</p><div class=highlight><pre tabindex=0 style=color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-cpp data-lang=cpp><span style=display:flex><span><span style=color:#75715e>#include</span> <span style=color:#75715e>&lt;toml.hpp&gt;</span><span style=color:#75715e>
</span></span></span><span style=display:flex><span><span style=color:#75715e></span>
</span></span><span style=display:flex><span><span style=color:#66d9ef>int</span> <span style=color:#a6e22e>main</span>()
</span></span><span style=display:flex><span>{
</span></span><span style=display:flex><span> <span style=color:#66d9ef>using</span> <span style=color:#66d9ef>namespace</span> toml<span style=color:#f92672>::</span>literals<span style=color:#f92672>::</span>toml_literals;
</span></span><span style=display:flex><span>
</span></span><span style=display:flex><span> <span style=color:#66d9ef>const</span> <span style=color:#66d9ef>auto</span> v <span style=color:#f92672>=</span> <span style=color:#e6db74>&#34;a = 42&#34;</span>_toml;
</span></span><span style=display:flex><span>
</span></span><span style=display:flex><span> assert(v.at(<span style=color:#e6db74>&#34;a&#34;</span>).as_integer() <span style=color:#f92672>==</span> <span style=color:#ae81ff>42</span>);
</span></span><span style=display:flex><span>
</span></span><span style=display:flex><span> <span style=color:#66d9ef>return</span> <span style=color:#ae81ff>0</span>;
</span></span><span style=display:flex><span>}
</span></span></code></pre></div><p>改行を含む場合、生文字列リテラルが便利です。</p><div class=highlight><pre tabindex=0 style=color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-cpp data-lang=cpp><span style=display:flex><span><span style=color:#75715e>#include</span> <span style=color:#75715e>&lt;toml.hpp&gt;</span><span style=color:#75715e>
</span></span></span><span style=display:flex><span><span style=color:#75715e></span>
</span></span><span style=display:flex><span><span style=color:#66d9ef>int</span> <span style=color:#a6e22e>main</span>()
</span></span><span style=display:flex><span>{
</span></span><span style=display:flex><span> <span style=color:#66d9ef>using</span> <span style=color:#66d9ef>namespace</span> toml<span style=color:#f92672>::</span>literals<span style=color:#f92672>::</span>toml_literals;
</span></span><span style=display:flex><span>
</span></span><span style=display:flex><span> <span style=color:#66d9ef>const</span> <span style=color:#66d9ef>auto</span> v <span style=color:#f92672>=</span> R<span style=color:#e6db74>&#34;(</span>
</span></span><span style=display:flex><span> a <span style=color:#f92672>=</span> <span style=color:#ae81ff>42</span>
</span></span><span style=display:flex><span> b <span style=color:#f92672>=</span> <span style=color:#e6db74>&#34;foo&#34;</span>
</span></span><span style=display:flex><span> )<span style=color:#e6db74>&#34;_toml;</span>
</span></span><span style=display:flex><span>
</span></span><span style=display:flex><span> assert(v.at(<span style=color:#e6db74>&#34;a&#34;</span>).as_integer() <span style=color:#f92672>==</span> <span style=color:#ae81ff>42</span>);
</span></span><span style=display:flex><span> assert(v.at(<span style=color:#e6db74>&#34;b&#34;</span>).as_string() <span style=color:#f92672>==</span> <span style=color:#e6db74>&#34;foo&#34;</span>);
</span></span><span style=display:flex><span>
</span></span><span style=display:flex><span> <span style=color:#66d9ef>return</span> <span style=color:#ae81ff>0</span>;
</span></span><span style=display:flex><span>}
</span></span></code></pre></div><p>値が単体で書かれていた場合、その値が返されます。</p><div class=highlight><pre tabindex=0 style=color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-cpp data-lang=cpp><span style=display:flex><span><span style=color:#75715e>#include</span> <span style=color:#75715e>&lt;toml.hpp&gt;</span><span style=color:#75715e>
</span></span></span><span style=display:flex><span><span style=color:#75715e></span>
</span></span><span style=display:flex><span><span style=color:#66d9ef>int</span> <span style=color:#a6e22e>main</span>()
</span></span><span style=display:flex><span>{
</span></span><span style=display:flex><span> <span style=color:#66d9ef>using</span> <span style=color:#66d9ef>namespace</span> toml<span style=color:#f92672>::</span>literals<span style=color:#f92672>::</span>toml_literals;
</span></span><span style=display:flex><span>
</span></span><span style=display:flex><span> <span style=color:#66d9ef>const</span> <span style=color:#66d9ef>auto</span> a <span style=color:#f92672>=</span> <span style=color:#e6db74>&#34;42&#34;</span>_toml;
</span></span><span style=display:flex><span> <span style=color:#66d9ef>const</span> <span style=color:#66d9ef>auto</span> b <span style=color:#f92672>=</span> <span style=color:#e6db74>&#34;12:34:56&#34;</span>_toml;
</span></span><span style=display:flex><span>
</span></span><span style=display:flex><span> assert(v.at(<span style=color:#e6db74>&#34;a&#34;</span>).as_integer() <span style=color:#f92672>==</span> <span style=color:#ae81ff>42</span>);
</span></span><span style=display:flex><span> assert(v.at(<span style=color:#e6db74>&#34;b&#34;</span>).as_local_time().hour <span style=color:#f92672>==</span> <span style=color:#ae81ff>12</span>);
</span></span><span style=display:flex><span> assert(v.at(<span style=color:#e6db74>&#34;b&#34;</span>).as_local_time().minute <span style=color:#f92672>==</span> <span style=color:#ae81ff>34</span>);
</span></span><span style=display:flex><span> assert(v.at(<span style=color:#e6db74>&#34;b&#34;</span>).as_local_time().second <span style=color:#f92672>==</span> <span style=color:#ae81ff>56</span>);
</span></span><span style=display:flex><span>
</span></span><span style=display:flex><span> <span style=color:#66d9ef>return</span> <span style=color:#ae81ff>0</span>;
</span></span><span style=display:flex><span>}
</span></span></code></pre></div><p>TOMLは数値のみからなるキーを許可しています。
よって、<code>[1]</code>はテーブル名として合法です。</p><p><code>[1]</code>のようにテーブル定義と配列の区別がつかない場合、テーブル定義が優先されます。</p><p>配列として解釈させるには、trailing commaを使用してください。</p><div class=highlight><pre tabindex=0 style=color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-cpp data-lang=cpp><span style=display:flex><span><span style=color:#75715e>#include</span> <span style=color:#75715e>&lt;toml.hpp&gt;</span><span style=color:#75715e>
</span></span></span><span style=display:flex><span><span style=color:#75715e></span>
</span></span><span style=display:flex><span><span style=color:#66d9ef>int</span> <span style=color:#a6e22e>main</span>()
</span></span><span style=display:flex><span>{
</span></span><span style=display:flex><span> <span style=color:#66d9ef>using</span> <span style=color:#66d9ef>namespace</span> toml<span style=color:#f92672>::</span>literals<span style=color:#f92672>::</span>toml_literals;
</span></span><span style=display:flex><span>
</span></span><span style=display:flex><span> <span style=color:#66d9ef>const</span> <span style=color:#66d9ef>auto</span> t <span style=color:#f92672>=</span> <span style=color:#e6db74>&#34;[1]&#34;</span>_toml; <span style=color:#75715e>// {1 = {}}
</span></span></span><span style=display:flex><span><span style=color:#75715e></span> <span style=color:#66d9ef>const</span> <span style=color:#66d9ef>auto</span> a <span style=color:#f92672>=</span> <span style=color:#e6db74>&#34;[1,]&#34;</span>_toml; <span style=color:#75715e>// [1,]
</span></span></span><span style=display:flex><span><span style=color:#75715e></span>
</span></span><span style=display:flex><span> assert(t.is_table());
</span></span><span style=display:flex><span> assert(t.at(<span style=color:#e6db74>&#34;1&#34;</span>).is_table());
</span></span><span style=display:flex><span>
</span></span><span style=display:flex><span> assert(a.is_array());
</span></span><span style=display:flex><span> assert(a.at(<span style=color:#ae81ff>0</span>).as_integer() <span style=color:#f92672>==</span> <span style=color:#ae81ff>1</span>);
</span></span><span style=display:flex><span>
</span></span><span style=display:flex><span> <span style=color:#66d9ef>return</span> <span style=color:#ae81ff>0</span>;
</span></span><span style=display:flex><span>}
</span></span></code></pre></div></article><footer class=book-footer><div class="flex flex-wrap justify-between"></div><script>(function(){function e(e){const t=window.getSelection(),n=document.createRange();n.selectNodeContents(e),t.removeAllRanges(),t.addRange(n)}document.querySelectorAll("pre code").forEach(t=>{t.addEventListener("click",function(){if(window.getSelection().toString())return;e(t.parentElement),navigator.clipboard&&navigator.clipboard.writeText(t.parentElement.textContent)})})})()</script></footer><label for=menu-control class="hidden book-menu-overlay"></label></div><aside class=book-toc><div class=book-toc-content><nav id=TableOfContents><ul><li><a href=#_tomlリテラル><code>_toml</code>リテラル</a></li></ul></nav></div></aside></main></body></html>
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