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<div class="title">std::ratio< Num, Denom > Class Template Reference<div class="ingroups"><a class="el" href="group__group-ext.html">External adapters</a> » <a class="el" href="group__group-ext-std.html">Standard library adapters</a></div></div> </div>
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<a name="details" id="details"></a><h2 class="groupheader">Description</h2>
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<div class="textblock"><h3>template<std::intmax_t Num, std::intmax_t Denom><br />
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class std::ratio< Num, Denom ></h3>
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<p>Adaptation of <code><a class="el" href="classstd_1_1ratio.html" title="Adaptation of std::ratio for Hana. ">std::ratio</a></code> for Hana. </p>
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<h2>Modeled concepts </h2>
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<ol type="1">
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<li><code>Comparable</code><br />
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<code><a class="el" href="classstd_1_1ratio.html" title="Adaptation of std::ratio for Hana. ">std::ratio</a></code>s are compared for equality using <code>std::ratio_equal</code>. <div class="fragment"><div class="line"><span class="comment">// Copyright Louis Dionne 2013-2017</span></div><div class="line"><span class="comment">// Distributed under the Boost Software License, Version 1.0.</span></div><div class="line"><span class="comment">// (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)</span></div><div class="line"></div><div class="line"><span class="preprocessor">#include <<a class="code" href="assert_8hpp.html">boost/hana/assert.hpp</a>></span></div><div class="line"><span class="preprocessor">#include <<a class="code" href="equal_8hpp.html">boost/hana/equal.hpp</a>></span></div><div class="line"><span class="preprocessor">#include <<a class="code" href="ratio_8hpp.html">boost/hana/ext/std/ratio.hpp</a>></span></div><div class="line"><span class="preprocessor">#include <<a class="code" href="not__equal_8hpp.html">boost/hana/not_equal.hpp</a>></span></div><div class="line"></div><div class="line"><span class="preprocessor">#include <ratio></span></div><div class="line"><span class="keyword">namespace </span>hana = <a class="code" href="namespaceboost_1_1hana.html">boost::hana</a>;</div><div class="line"></div><div class="line"></div><div class="line"><a class="code" href="group__group-assertions.html#ga4bf9e0c46c44e21fbe5c5fbb3ace8356">BOOST_HANA_CONSTANT_CHECK</a>(<a class="code" href="group__group-Comparable.html#gacaf1ebea6b3ab96ac9dcb82f0e64e547">hana::equal</a>(<a class="code" href="classstd_1_1ratio.html">std::ratio<3, 4></a>{}, <a class="code" href="classstd_1_1ratio.html">std::ratio<15, 20></a>{}));</div><div class="line"><a class="code" href="group__group-assertions.html#ga4bf9e0c46c44e21fbe5c5fbb3ace8356">BOOST_HANA_CONSTANT_CHECK</a>(<a class="code" href="group__group-Comparable.html#gae33be2e0d5e04f19082f4b7740dfc9cd">hana::not_equal</a>(<a class="code" href="classstd_1_1ratio.html">std::ratio<3, 4></a>{}, <a class="code" href="classstd_1_1ratio.html">std::ratio<3, 5></a>{}));</div><div class="line"></div><div class="line"><span class="keywordtype">int</span> main() { }</div></div><!-- fragment --></li>
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<li><code>Orderable</code><br />
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<code><a class="el" href="classstd_1_1ratio.html" title="Adaptation of std::ratio for Hana. ">std::ratio</a></code>s are ordered using <code>std::ratio_less</code>. <div class="fragment"><div class="line"><span class="comment">// Copyright Louis Dionne 2013-2017</span></div><div class="line"><span class="comment">// Distributed under the Boost Software License, Version 1.0.</span></div><div class="line"><span class="comment">// (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)</span></div><div class="line"></div><div class="line"><span class="preprocessor">#include <<a class="code" href="assert_8hpp.html">boost/hana/assert.hpp</a>></span></div><div class="line"><span class="preprocessor">#include <<a class="code" href="ratio_8hpp.html">boost/hana/ext/std/ratio.hpp</a>></span></div><div class="line"><span class="preprocessor">#include <<a class="code" href="less_8hpp.html">boost/hana/less.hpp</a>></span></div><div class="line"><span class="preprocessor">#include <<a class="code" href="less__equal_8hpp.html">boost/hana/less_equal.hpp</a>></span></div><div class="line"></div><div class="line"><span class="preprocessor">#include <ratio></span></div><div class="line"><span class="keyword">namespace </span>hana = <a class="code" href="namespaceboost_1_1hana.html">boost::hana</a>;</div><div class="line"></div><div class="line"></div><div class="line"><a class="code" href="group__group-assertions.html#ga4bf9e0c46c44e21fbe5c5fbb3ace8356">BOOST_HANA_CONSTANT_CHECK</a>(<a class="code" href="group__group-Orderable.html#gad510011602bdb14686f1c4ec145301c9">hana::less</a>(<a class="code" href="classstd_1_1ratio.html">std::ratio<3, 12></a>{}, <a class="code" href="classstd_1_1ratio.html">std::ratio<5, 12></a>{}));</div><div class="line"><a class="code" href="group__group-assertions.html#ga4bf9e0c46c44e21fbe5c5fbb3ace8356">BOOST_HANA_CONSTANT_CHECK</a>(<a class="code" href="group__group-Orderable.html#ga9917dd82beb67151bf5657245d37b851">hana::less_equal</a>(<a class="code" href="classstd_1_1ratio.html">std::ratio<6, 12></a>{}, <a class="code" href="classstd_1_1ratio.html">std::ratio<4, 8></a>{}));</div><div class="line"></div><div class="line"><span class="keywordtype">int</span> main() { }</div></div><!-- fragment --></li>
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<li><code>Monoid</code>, <code>Group</code>, <code>Ring</code>, and <code>EuclideanRing</code><br />
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<code><a class="el" href="classstd_1_1ratio.html" title="Adaptation of std::ratio for Hana. ">std::ratio</a></code>s are added, subtracted, multiplied and divided using <code>std::ratio_add</code>, <code>std::ratio_subtract</code>, <code>std::ratio_multiply</code> and <code>std::ratio_divide</code>, respectively. Furthermore, the neutral element for the additive operation is <code><a class="el" href="classstd_1_1ratio.html" title="Adaptation of std::ratio for Hana. ">std::ratio</a><0, 1>{}</code>, and the neutral element for the multiplicative operation is <code><a class="el" href="classstd_1_1ratio.html" title="Adaptation of std::ratio for Hana. ">std::ratio</a><1, 1>{}</code>. <div class="fragment"><div class="line"><span class="comment">// Copyright Louis Dionne 2013-2017</span></div><div class="line"><span class="comment">// Distributed under the Boost Software License, Version 1.0.</span></div><div class="line"><span class="comment">// (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)</span></div><div class="line"></div><div class="line"><span class="preprocessor">#include <<a class="code" href="assert_8hpp.html">boost/hana/assert.hpp</a>></span></div><div class="line"><span class="preprocessor">#include <<a class="code" href="div_8hpp.html">boost/hana/div.hpp</a>></span></div><div class="line"><span class="preprocessor">#include <<a class="code" href="equal_8hpp.html">boost/hana/equal.hpp</a>></span></div><div class="line"><span class="preprocessor">#include <<a class="code" href="ratio_8hpp.html">boost/hana/ext/std/ratio.hpp</a>></span></div><div class="line"><span class="preprocessor">#include <<a class="code" href="minus_8hpp.html">boost/hana/minus.hpp</a>></span></div><div class="line"><span class="preprocessor">#include <<a class="code" href="mod_8hpp.html">boost/hana/mod.hpp</a>></span></div><div class="line"><span class="preprocessor">#include <<a class="code" href="mult_8hpp.html">boost/hana/mult.hpp</a>></span></div><div class="line"><span class="preprocessor">#include <<a class="code" href="one_8hpp.html">boost/hana/one.hpp</a>></span></div><div class="line"><span class="preprocessor">#include <<a class="code" href="plus_8hpp.html">boost/hana/plus.hpp</a>></span></div><div class="line"><span class="preprocessor">#include <<a class="code" href="zero_8hpp.html">boost/hana/zero.hpp</a>></span></div><div class="line"></div><div class="line"><span class="preprocessor">#include <ratio></span></div><div class="line"><span class="keyword">namespace </span>hana = <a class="code" href="namespaceboost_1_1hana.html">boost::hana</a>;</div><div class="line"></div><div class="line"></div><div class="line"><a class="code" href="group__group-assertions.html#ga4bf9e0c46c44e21fbe5c5fbb3ace8356">BOOST_HANA_CONSTANT_CHECK</a>(<a class="code" href="group__group-Comparable.html#gacaf1ebea6b3ab96ac9dcb82f0e64e547">hana::equal</a>(</div><div class="line"> <a class="code" href="group__group-Monoid.html#gaeb5d4a1e967e319712f9e4791948896c">hana::plus</a>(<a class="code" href="classstd_1_1ratio.html">std::ratio<5, 3></a>{}, <a class="code" href="classstd_1_1ratio.html">std::ratio<3, 12></a>{}),</div><div class="line"> <a class="code" href="classstd_1_1ratio.html">std::ratio<23, 12></a>{}</div><div class="line">));</div><div class="line"></div><div class="line"><a class="code" href="group__group-assertions.html#ga4bf9e0c46c44e21fbe5c5fbb3ace8356">BOOST_HANA_CONSTANT_CHECK</a>(<a class="code" href="group__group-Comparable.html#gacaf1ebea6b3ab96ac9dcb82f0e64e547">hana::equal</a>(</div><div class="line"> <a class="code" href="group__group-Group.html#ga2020c526324f361a2b990fe8d1b07c20">hana::minus</a>(<a class="code" href="classstd_1_1ratio.html">std::ratio<5, 3></a>{}, <a class="code" href="classstd_1_1ratio.html">std::ratio<3, 13></a>{}),</div><div class="line"> <a class="code" href="classstd_1_1ratio.html">std::ratio<56, 39></a>{}</div><div class="line">));</div><div class="line"></div><div class="line"><a class="code" href="group__group-assertions.html#ga4bf9e0c46c44e21fbe5c5fbb3ace8356">BOOST_HANA_CONSTANT_CHECK</a>(<a class="code" href="group__group-Comparable.html#gacaf1ebea6b3ab96ac9dcb82f0e64e547">hana::equal</a>(</div><div class="line"> <a class="code" href="group__group-Ring.html#ga052d31c269a6a438cc8004c9ad1efdfa">hana::mult</a>(<a class="code" href="classstd_1_1ratio.html">std::ratio<5, 3></a>{}, <a class="code" href="classstd_1_1ratio.html">std::ratio<3, 13></a>{}),</div><div class="line"> <a class="code" href="classstd_1_1ratio.html">std::ratio<15, 39></a>{}</div><div class="line">));</div><div class="line"></div><div class="line"><a class="code" href="group__group-assertions.html#ga4bf9e0c46c44e21fbe5c5fbb3ace8356">BOOST_HANA_CONSTANT_CHECK</a>(<a class="code" href="group__group-Comparable.html#gacaf1ebea6b3ab96ac9dcb82f0e64e547">hana::equal</a>(</div><div class="line"> <a class="code" href="group__group-EuclideanRing.html#ga4225a7988ce98903228913dde53762df">hana::div</a>(<a class="code" href="classstd_1_1ratio.html">std::ratio<5, 3></a>{}, <a class="code" href="classstd_1_1ratio.html">std::ratio<3, 13></a>{}),</div><div class="line"> <a class="code" href="classstd_1_1ratio.html">std::ratio<65, 9></a>{}</div><div class="line">));</div><div class="line"></div><div class="line"><span class="comment">// The mod of two ratios is always 0, because they can always be</span></div><div class="line"><span class="comment">// divided without remainder.</span></div><div class="line"><a class="code" href="group__group-assertions.html#ga4bf9e0c46c44e21fbe5c5fbb3ace8356">BOOST_HANA_CONSTANT_CHECK</a>(<a class="code" href="group__group-Comparable.html#gacaf1ebea6b3ab96ac9dcb82f0e64e547">hana::equal</a>(</div><div class="line"> <a class="code" href="group__group-EuclideanRing.html#ga9b47b223d5b02db933b3c93b5bd1a062">hana::mod</a>(<a class="code" href="classstd_1_1ratio.html">std::ratio<5, 3></a>{}, <a class="code" href="classstd_1_1ratio.html">std::ratio<3, 13></a>{}),</div><div class="line"> <a class="code" href="classstd_1_1ratio.html">std::ratio<0></a>{}</div><div class="line">));</div><div class="line"></div><div class="line"><a class="code" href="group__group-assertions.html#ga4bf9e0c46c44e21fbe5c5fbb3ace8356">BOOST_HANA_CONSTANT_CHECK</a>(<a class="code" href="group__group-Comparable.html#gacaf1ebea6b3ab96ac9dcb82f0e64e547">hana::equal</a>(</div><div class="line"> hana::zero<hana::ext::std::ratio_tag>(),</div><div class="line"> <a class="code" href="classstd_1_1ratio.html">std::ratio<0></a>{}</div><div class="line">));</div><div class="line"></div><div class="line"><a class="code" href="group__group-assertions.html#ga4bf9e0c46c44e21fbe5c5fbb3ace8356">BOOST_HANA_CONSTANT_CHECK</a>(<a class="code" href="group__group-Comparable.html#gacaf1ebea6b3ab96ac9dcb82f0e64e547">hana::equal</a>(</div><div class="line"> hana::one<hana::ext::std::ratio_tag>(),</div><div class="line"> <a class="code" href="classstd_1_1ratio.html">std::ratio<1></a>{}</div><div class="line">));</div><div class="line"></div><div class="line"><span class="keywordtype">int</span> main() { }</div></div><!-- fragment --> </li>
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