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<a href="https://github.com/mpusz/mp-units/edit/master/docs/getting_started/code_example.md" title="Edit this page" class="md-content__button md-icon">
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<h1 id="code-example">Code Example<a class="headerlink" href="#code-example" title="Permanent link">&para;</a></h1>
<p>Here is a small example of operations possible on scalar quantities:</p>
<div class="language-cpp highlight"><pre><span></span><code><span id="__span-0-1"><a id="__codelineno-0-1" name="__codelineno-0-1" href="#__codelineno-0-1"></a><span class="cp">#include</span><span class="w"> </span><span class="cpf">&lt;mp-units/systems/si/si.h&gt;</span>
</span><span id="__span-0-2"><a id="__codelineno-0-2" name="__codelineno-0-2" href="#__codelineno-0-2"></a>
</span><span id="__span-0-3"><a id="__codelineno-0-3" name="__codelineno-0-3" href="#__codelineno-0-3"></a><span class="k">using</span><span class="w"> </span><span class="k">namespace</span><span class="w"> </span><span class="nn">mp_units</span><span class="p">;</span>
</span><span id="__span-0-4"><a id="__codelineno-0-4" name="__codelineno-0-4" href="#__codelineno-0-4"></a><span class="k">using</span><span class="w"> </span><span class="k">namespace</span><span class="w"> </span><span class="nn">mp_units</span><span class="o">::</span><span class="nn">si</span><span class="o">::</span><span class="nn">unit_symbols</span><span class="p">;</span>
</span><span id="__span-0-5"><a id="__codelineno-0-5" name="__codelineno-0-5" href="#__codelineno-0-5"></a>
</span><span id="__span-0-6"><a id="__codelineno-0-6" name="__codelineno-0-6" href="#__codelineno-0-6"></a><span class="c1">// simple numeric operations</span>
</span><span id="__span-0-7"><a id="__codelineno-0-7" name="__codelineno-0-7" href="#__codelineno-0-7"></a><span class="k">static_assert</span><span class="p">(</span><span class="mi">10</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="n">km</span><span class="w"> </span><span class="o">/</span><span class="w"> </span><span class="mi">2</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="mi">5</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="n">km</span><span class="p">);</span>
</span><span id="__span-0-8"><a id="__codelineno-0-8" name="__codelineno-0-8" href="#__codelineno-0-8"></a>
</span><span id="__span-0-9"><a id="__codelineno-0-9" name="__codelineno-0-9" href="#__codelineno-0-9"></a><span class="c1">// unit conversions</span>
</span><span id="__span-0-10"><a id="__codelineno-0-10" name="__codelineno-0-10" href="#__codelineno-0-10"></a><span class="k">static_assert</span><span class="p">(</span><span class="mi">1</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="n">h</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="mi">3600</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="n">s</span><span class="p">);</span>
</span><span id="__span-0-11"><a id="__codelineno-0-11" name="__codelineno-0-11" href="#__codelineno-0-11"></a><span class="k">static_assert</span><span class="p">(</span><span class="mi">1</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="n">km</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="mi">1</span><span class="w"> </span><span class="o">*</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">1001</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="n">m</span><span class="p">);</span>
</span><span id="__span-0-12"><a id="__codelineno-0-12" name="__codelineno-0-12" href="#__codelineno-0-12"></a>
</span><span id="__span-0-13"><a id="__codelineno-0-13" name="__codelineno-0-13" href="#__codelineno-0-13"></a><span class="c1">// derived quantities</span>
</span><span id="__span-0-14"><a id="__codelineno-0-14" name="__codelineno-0-14" href="#__codelineno-0-14"></a><span class="k">static_assert</span><span class="p">(</span><span class="mi">1</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="n">km</span><span class="w"> </span><span class="o">/</span><span class="w"> </span><span class="p">(</span><span class="mi">1</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="n">s</span><span class="p">)</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="mi">1000</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="n">m</span><span class="w"> </span><span class="o">/</span><span class="w"> </span><span class="n">s</span><span class="p">);</span>
</span><span id="__span-0-15"><a id="__codelineno-0-15" name="__codelineno-0-15" href="#__codelineno-0-15"></a><span class="k">static_assert</span><span class="p">(</span><span class="mi">2</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="n">km</span><span class="w"> </span><span class="o">/</span><span class="w"> </span><span class="n">h</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="p">(</span><span class="mi">2</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="n">h</span><span class="p">)</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="mi">4</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="n">km</span><span class="p">);</span>
</span><span id="__span-0-16"><a id="__codelineno-0-16" name="__codelineno-0-16" href="#__codelineno-0-16"></a><span class="k">static_assert</span><span class="p">(</span><span class="mi">2</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="n">km</span><span class="w"> </span><span class="o">/</span><span class="w"> </span><span class="p">(</span><span class="mi">2</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="n">km</span><span class="w"> </span><span class="o">/</span><span class="w"> </span><span class="n">h</span><span class="p">)</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="mi">1</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="n">h</span><span class="p">);</span>
</span><span id="__span-0-17"><a id="__codelineno-0-17" name="__codelineno-0-17" href="#__codelineno-0-17"></a>
</span><span id="__span-0-18"><a id="__codelineno-0-18" name="__codelineno-0-18" href="#__codelineno-0-18"></a><span class="k">static_assert</span><span class="p">(</span><span class="mi">2</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="n">m</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="p">(</span><span class="mi">3</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="n">m</span><span class="p">)</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="mi">6</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="n">m2</span><span class="p">);</span>
</span><span id="__span-0-19"><a id="__codelineno-0-19" name="__codelineno-0-19" href="#__codelineno-0-19"></a>
</span><span id="__span-0-20"><a id="__codelineno-0-20" name="__codelineno-0-20" href="#__codelineno-0-20"></a><span class="k">static_assert</span><span class="p">(</span><span class="mi">10</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="n">km</span><span class="w"> </span><span class="o">/</span><span class="w"> </span><span class="p">(</span><span class="mi">5</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="n">km</span><span class="p">)</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="mi">2</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="n">one</span><span class="p">);</span>
</span><span id="__span-0-21"><a id="__codelineno-0-21" name="__codelineno-0-21" href="#__codelineno-0-21"></a>
</span><span id="__span-0-22"><a id="__codelineno-0-22" name="__codelineno-0-22" href="#__codelineno-0-22"></a><span class="k">static_assert</span><span class="p">(</span><span class="mi">1000</span><span class="w"> </span><span class="o">/</span><span class="w"> </span><span class="p">(</span><span class="mi">1</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="n">s</span><span class="p">)</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="mi">1</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="n">kHz</span><span class="p">);</span>
</span></code></pre></div>
<div class="admonition example">
<p class="admonition-title"><a href="https://godbolt.org/z/81Ev7qhTd">Try it on Compiler Explorer</a></p>
</div>
<p>This library requires some C++20 features (<a href="https://en.cppreference.com/w/cpp/language/constraints">concepts and constraints</a>,
<a href="https://en.cppreference.com/w/cpp/language/template_parameters">classes as <abbr title="Non-Type Template Parameter">NTTP</abbr></a>, ...). Thanks to them,
a user gets a powerful but still easy-to-use interface where all unit conversions and dimensional analysis can be
performed without sacrificing accuracy. Please see the below example for a quick preview of basic library features:</p>
<div class="language-cpp highlight"><pre><span></span><code><span id="__span-1-1"><a id="__codelineno-1-1" name="__codelineno-1-1" href="#__codelineno-1-1"></a><span class="cp">#include</span><span class="w"> </span><span class="cpf">&lt;mp-units/format.h&gt;</span>
</span><span id="__span-1-2"><a id="__codelineno-1-2" name="__codelineno-1-2" href="#__codelineno-1-2"></a><span class="cp">#include</span><span class="w"> </span><span class="cpf">&lt;mp-units/ostream.h&gt;</span>
</span><span id="__span-1-3"><a id="__codelineno-1-3" name="__codelineno-1-3" href="#__codelineno-1-3"></a><span class="cp">#include</span><span class="w"> </span><span class="cpf">&lt;mp-units/systems/international/international.h&gt;</span>
</span><span id="__span-1-4"><a id="__codelineno-1-4" name="__codelineno-1-4" href="#__codelineno-1-4"></a><span class="cp">#include</span><span class="w"> </span><span class="cpf">&lt;mp-units/systems/isq/isq.h&gt;</span>
</span><span id="__span-1-5"><a id="__codelineno-1-5" name="__codelineno-1-5" href="#__codelineno-1-5"></a><span class="cp">#include</span><span class="w"> </span><span class="cpf">&lt;mp-units/systems/si/si.h&gt;</span>
</span><span id="__span-1-6"><a id="__codelineno-1-6" name="__codelineno-1-6" href="#__codelineno-1-6"></a><span class="cp">#include</span><span class="w"> </span><span class="cpf">&lt;iostream&gt;</span>
</span><span id="__span-1-7"><a id="__codelineno-1-7" name="__codelineno-1-7" href="#__codelineno-1-7"></a>
</span><span id="__span-1-8"><a id="__codelineno-1-8" name="__codelineno-1-8" href="#__codelineno-1-8"></a><span class="k">using</span><span class="w"> </span><span class="k">namespace</span><span class="w"> </span><span class="nn">mp_units</span><span class="p">;</span>
</span><span id="__span-1-9"><a id="__codelineno-1-9" name="__codelineno-1-9" href="#__codelineno-1-9"></a>
</span><span id="__span-1-10"><a id="__codelineno-1-10" name="__codelineno-1-10" href="#__codelineno-1-10"></a><span class="k">constexpr</span><span class="w"> </span><span class="n">QuantityOf</span><span class="o">&lt;</span><span class="n">isq</span><span class="o">::</span><span class="n">speed</span><span class="o">&gt;</span><span class="w"> </span><span class="k">auto</span><span class="w"> </span><span class="n">avg_speed</span><span class="p">(</span><span class="n">QuantityOf</span><span class="o">&lt;</span><span class="n">isq</span><span class="o">::</span><span class="n">length</span><span class="o">&gt;</span><span class="w"> </span><span class="k">auto</span><span class="w"> </span><span class="n">d</span><span class="p">,</span>
</span><span id="__span-1-11"><a id="__codelineno-1-11" name="__codelineno-1-11" href="#__codelineno-1-11"></a><span class="w"> </span><span class="n">QuantityOf</span><span class="o">&lt;</span><span class="n">isq</span><span class="o">::</span><span class="n">time</span><span class="o">&gt;</span><span class="w"> </span><span class="k">auto</span><span class="w"> </span><span class="n">t</span><span class="p">)</span>
</span><span id="__span-1-12"><a id="__codelineno-1-12" name="__codelineno-1-12" href="#__codelineno-1-12"></a><span class="p">{</span>
</span><span id="__span-1-13"><a id="__codelineno-1-13" name="__codelineno-1-13" href="#__codelineno-1-13"></a><span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">d</span><span class="w"> </span><span class="o">/</span><span class="w"> </span><span class="n">t</span><span class="p">;</span>
</span><span id="__span-1-14"><a id="__codelineno-1-14" name="__codelineno-1-14" href="#__codelineno-1-14"></a><span class="p">}</span>
</span><span id="__span-1-15"><a id="__codelineno-1-15" name="__codelineno-1-15" href="#__codelineno-1-15"></a>
</span><span id="__span-1-16"><a id="__codelineno-1-16" name="__codelineno-1-16" href="#__codelineno-1-16"></a><span class="kt">int</span><span class="w"> </span><span class="n">main</span><span class="p">()</span>
</span><span id="__span-1-17"><a id="__codelineno-1-17" name="__codelineno-1-17" href="#__codelineno-1-17"></a><span class="p">{</span>
</span><span id="__span-1-18"><a id="__codelineno-1-18" name="__codelineno-1-18" href="#__codelineno-1-18"></a><span class="w"> </span><span class="k">using</span><span class="w"> </span><span class="k">namespace</span><span class="w"> </span><span class="nn">mp_units</span><span class="o">::</span><span class="nn">si</span><span class="o">::</span><span class="nn">unit_symbols</span><span class="p">;</span>
</span><span id="__span-1-19"><a id="__codelineno-1-19" name="__codelineno-1-19" href="#__codelineno-1-19"></a><span class="w"> </span><span class="k">using</span><span class="w"> </span><span class="k">namespace</span><span class="w"> </span><span class="nn">mp_units</span><span class="o">::</span><span class="nn">international</span><span class="o">::</span><span class="nn">unit_symbols</span><span class="p">;</span>
</span><span id="__span-1-20"><a id="__codelineno-1-20" name="__codelineno-1-20" href="#__codelineno-1-20"></a>
</span><span id="__span-1-21"><a id="__codelineno-1-21" name="__codelineno-1-21" href="#__codelineno-1-21"></a><span class="w"> </span><span class="k">constexpr</span><span class="w"> </span><span class="n">quantity</span><span class="w"> </span><span class="n">v1</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">110</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="n">km</span><span class="w"> </span><span class="o">/</span><span class="w"> </span><span class="n">h</span><span class="p">;</span>
</span><span id="__span-1-22"><a id="__codelineno-1-22" name="__codelineno-1-22" href="#__codelineno-1-22"></a><span class="w"> </span><span class="k">constexpr</span><span class="w"> </span><span class="n">quantity</span><span class="w"> </span><span class="n">v2</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">70</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="n">mph</span><span class="p">;</span>
</span><span id="__span-1-23"><a id="__codelineno-1-23" name="__codelineno-1-23" href="#__codelineno-1-23"></a><span class="w"> </span><span class="k">constexpr</span><span class="w"> </span><span class="n">quantity</span><span class="w"> </span><span class="n">v3</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">avg_speed</span><span class="p">(</span><span class="mf">220.</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="n">isq</span><span class="o">::</span><span class="n">distance</span><span class="p">[</span><span class="n">km</span><span class="p">],</span><span class="w"> </span><span class="mi">2</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="n">h</span><span class="p">);</span>
</span><span id="__span-1-24"><a id="__codelineno-1-24" name="__codelineno-1-24" href="#__codelineno-1-24"></a><span class="w"> </span><span class="k">constexpr</span><span class="w"> </span><span class="n">quantity</span><span class="w"> </span><span class="n">v4</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">avg_speed</span><span class="p">(</span><span class="n">isq</span><span class="o">::</span><span class="n">distance</span><span class="p">(</span><span class="mf">140.</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="n">mi</span><span class="p">),</span><span class="w"> </span><span class="mi">2</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="n">h</span><span class="p">);</span>
</span><span id="__span-1-25"><a id="__codelineno-1-25" name="__codelineno-1-25" href="#__codelineno-1-25"></a><span class="w"> </span><span class="k">constexpr</span><span class="w"> </span><span class="n">quantity</span><span class="w"> </span><span class="n">v5</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">v3</span><span class="p">.</span><span class="n">in</span><span class="p">(</span><span class="n">m</span><span class="w"> </span><span class="o">/</span><span class="w"> </span><span class="n">s</span><span class="p">);</span>
</span><span id="__span-1-26"><a id="__codelineno-1-26" name="__codelineno-1-26" href="#__codelineno-1-26"></a><span class="w"> </span><span class="k">constexpr</span><span class="w"> </span><span class="n">quantity</span><span class="w"> </span><span class="n">v6</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">value_cast</span><span class="o">&lt;</span><span class="n">m</span><span class="w"> </span><span class="o">/</span><span class="w"> </span><span class="n">s</span><span class="o">&gt;</span><span class="p">(</span><span class="n">v4</span><span class="p">);</span>
</span><span id="__span-1-27"><a id="__codelineno-1-27" name="__codelineno-1-27" href="#__codelineno-1-27"></a><span class="w"> </span><span class="k">constexpr</span><span class="w"> </span><span class="n">quantity</span><span class="w"> </span><span class="n">v7</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">value_cast</span><span class="o">&lt;</span><span class="kt">int</span><span class="o">&gt;</span><span class="p">(</span><span class="n">v6</span><span class="p">);</span>
</span><span id="__span-1-28"><a id="__codelineno-1-28" name="__codelineno-1-28" href="#__codelineno-1-28"></a>
</span><span id="__span-1-29"><a id="__codelineno-1-29" name="__codelineno-1-29" href="#__codelineno-1-29"></a><span class="w"> </span><span class="n">std</span><span class="o">::</span><span class="n">cout</span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="n">v1</span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="sc">&#39;\n&#39;</span><span class="p">;</span><span class="w"> </span><span class="c1">// 110 km/h</span>
</span><span id="__span-1-30"><a id="__codelineno-1-30" name="__codelineno-1-30" href="#__codelineno-1-30"></a><span class="w"> </span><span class="n">std</span><span class="o">::</span><span class="n">cout</span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="n">v2</span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="sc">&#39;\n&#39;</span><span class="p">;</span><span class="w"> </span><span class="c1">// 70 mi/h</span>
</span><span id="__span-1-31"><a id="__codelineno-1-31" name="__codelineno-1-31" href="#__codelineno-1-31"></a><span class="w"> </span><span class="n">std</span><span class="o">::</span><span class="n">cout</span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="n">std</span><span class="o">::</span><span class="n">format</span><span class="p">(</span><span class="s">&quot;{}&quot;</span><span class="p">,</span><span class="w"> </span><span class="n">v3</span><span class="p">)</span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="sc">&#39;\n&#39;</span><span class="p">;</span><span class="w"> </span><span class="c1">// 110 km/h</span>
</span><span id="__span-1-32"><a id="__codelineno-1-32" name="__codelineno-1-32" href="#__codelineno-1-32"></a><span class="w"> </span><span class="n">std</span><span class="o">::</span><span class="n">cout</span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="n">std</span><span class="o">::</span><span class="n">format</span><span class="p">(</span><span class="s">&quot;{:*^14}&quot;</span><span class="p">,</span><span class="w"> </span><span class="n">v4</span><span class="p">)</span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="sc">&#39;\n&#39;</span><span class="p">;</span><span class="w"> </span><span class="c1">// ***70 mi/h****</span>
</span><span id="__span-1-33"><a id="__codelineno-1-33" name="__codelineno-1-33" href="#__codelineno-1-33"></a><span class="w"> </span><span class="n">std</span><span class="o">::</span><span class="n">cout</span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="n">std</span><span class="o">::</span><span class="n">format</span><span class="p">(</span><span class="s">&quot;{:%Q in %q}&quot;</span><span class="p">,</span><span class="w"> </span><span class="n">v5</span><span class="p">)</span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="sc">&#39;\n&#39;</span><span class="p">;</span><span class="w"> </span><span class="c1">// 30.5556 in m/s</span>
</span><span id="__span-1-34"><a id="__codelineno-1-34" name="__codelineno-1-34" href="#__codelineno-1-34"></a><span class="w"> </span><span class="n">std</span><span class="o">::</span><span class="n">cout</span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="n">std</span><span class="o">::</span><span class="n">format</span><span class="p">(</span><span class="s">&quot;{0:%Q} in {0:%q}&quot;</span><span class="p">,</span><span class="w"> </span><span class="n">v6</span><span class="p">)</span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="sc">&#39;\n&#39;</span><span class="p">;</span><span class="w"> </span><span class="c1">// 31.2928 in m/s</span>
</span><span id="__span-1-35"><a id="__codelineno-1-35" name="__codelineno-1-35" href="#__codelineno-1-35"></a><span class="w"> </span><span class="n">std</span><span class="o">::</span><span class="n">cout</span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="n">std</span><span class="o">::</span><span class="n">format</span><span class="p">(</span><span class="s">&quot;{:%Q}&quot;</span><span class="p">,</span><span class="w"> </span><span class="n">v7</span><span class="p">)</span><span class="w"> </span><span class="o">&lt;&lt;</span><span class="w"> </span><span class="sc">&#39;\n&#39;</span><span class="p">;</span><span class="w"> </span><span class="c1">// 31</span>
</span><span id="__span-1-36"><a id="__codelineno-1-36" name="__codelineno-1-36" href="#__codelineno-1-36"></a><span class="p">}</span>
</span></code></pre></div>
<div class="admonition example">
<p class="admonition-title"><a href="https://godbolt.org/z/Tsesa1Pvq">Try it on Compiler Explorer</a></p>
</div>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>More code examples can be found in the <a href="../../users_guide/examples/tags_index/">Examples</a> chapter.</p>
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