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- <a name="details" id="details"></a><h2 class="groupheader">Description</h2>
- <div class="textblock"><h3>template<typename ... Xs><br />
- struct boost::hana::basic_tuple< Xs ></h3>
- <p>Stripped down version of <code><a class="el" href="structboost_1_1hana_1_1tuple.html" title="General purpose index-based heterogeneous sequence with a fixed length.">hana::tuple</a></code>. </p>
- <p>Whereas <code><a class="el" href="structboost_1_1hana_1_1tuple.html" title="General purpose index-based heterogeneous sequence with a fixed length.">hana::tuple</a></code> aims to provide an interface somewhat close to a <code><a class="el" href="structstd_1_1tuple.html" title="Adapter for std::tuples.">std::tuple</a></code>, <code><a class="el" href="structboost_1_1hana_1_1basic__tuple.html" title="Stripped down version of hana::tuple.">basic_tuple</a></code> provides the strict minimum required to implement a closure with maximum compile-time efficiency.</p>
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- <tr class="memdesc:a53975be786ae1db16185edab229547cd"><td class="mdescLeft"> </td><td class="mdescRight">Function object for creating a <code><a class="el" href="structboost_1_1hana_1_1basic__tuple.html" title="Stripped down version of hana::tuple.">basic_tuple</a></code>. <a href="#a53975be786ae1db16185edab229547cd">More...</a><br /></td></tr>
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- <tr class="memdesc:afe2c3fc2808e83353b7274dddd662c7e"><td class="mdescLeft"> </td><td class="mdescRight">Alias to <code>make<<a class="el" href="structboost_1_1hana_1_1basic__tuple__tag.html" title="Tag representing hana::basic_tuple.">basic_tuple_tag</a>></code>; provided for convenience. <a href="#afe2c3fc2808e83353b7274dddd662c7e">More...</a><br /></td></tr>
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- <h2 class="groupheader">Associated functions</h2>
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- <h2 class="memtitle"><span class="permalink"><a href="#a53975be786ae1db16185edab229547cd">◆ </a></span>make< basic_tuple_tag ></h2>
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- template<typename ... Xs> </div>
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- <td class="memname">constexpr auto <a class="el" href="group__group-core.html#ga1d92480f0af1029878e773dafa3e2f60">make</a>< <a class="el" href="structboost_1_1hana_1_1basic__tuple__tag.html">basic_tuple_tag</a> ></td>
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- <b>Initial value:</b><div class="fragment"><div class="line">= [](<span class="keyword">auto</span>&& ...xs) {</div><div class="line"> <span class="keywordflow">return</span> basic_tuple<std::decay_t<decltype(xs)>...>{forwarded(xs)...};</div><div class="line"> }</div></div><!-- fragment -->
- <p>Function object for creating a <code><a class="el" href="structboost_1_1hana_1_1basic__tuple.html" title="Stripped down version of hana::tuple.">basic_tuple</a></code>. </p>
- <p>Given zero or more objects <code>xs...</code>, <code>make<<a class="el" href="structboost_1_1hana_1_1basic__tuple__tag.html" title="Tag representing hana::basic_tuple.">basic_tuple_tag</a>></code> returns a new <code><a class="el" href="structboost_1_1hana_1_1basic__tuple.html" title="Stripped down version of hana::tuple.">basic_tuple</a></code> containing those objects. The elements are held by value inside the resulting tuple, and they are hence copied or moved in. This is analogous to <code>std::make_tuple</code> for creating <code><a class="el" href="structboost_1_1hana_1_1basic__tuple.html" title="Stripped down version of hana::tuple.">basic_tuple</a></code>s.</p>
- <h2>Example </h2>
- <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="basic__tuple_8hpp.html">boost/hana/basic_tuple.hpp</a>></span></div><div class="line"><span class="preprocessor">#include <<a class="code" href="core_2make_8hpp.html">boost/hana/core/make.hpp</a>></span></div><div class="line"></div><div class="line"><span class="preprocessor">#include <type_traits></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">constexpr hana::basic_tuple<int, char, double> xs{1, <span class="charliteral">'2'</span>, 3.3};</div><div class="line">constexpr <span class="keyword">auto</span> ys = hana::make<hana::basic_tuple_tag>(1, <span class="charliteral">'2'</span>, 3.3);</div><div class="line">constexpr <span class="keyword">auto</span> zs = hana::make_basic_tuple(1, <span class="charliteral">'2'</span>, 3.3);</div><div class="line"></div><div class="line">static_assert(std::is_same<decltype(ys), decltype(xs)>::<a class="code" href="group__group-Constant.html#ga1687520692a6b0c49e3a69de2980f388">value</a>, <span class="stringliteral">""</span>);</div><div class="line">static_assert(std::is_same<decltype(zs), decltype(xs)>::<a class="code" href="group__group-Constant.html#ga1687520692a6b0c49e3a69de2980f388">value</a>, <span class="stringliteral">""</span>);</div><div class="line"></div><div class="line"><span class="keywordtype">int</span> main() { }</div></div><!-- fragment -->
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- <td class="memname">constexpr auto make_basic_tuple = <a class="el" href="group__group-core.html#ga1d92480f0af1029878e773dafa3e2f60">make</a><<a class="el" href="structboost_1_1hana_1_1basic__tuple__tag.html">basic_tuple_tag</a>></td>
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- <p>Alias to <code>make<<a class="el" href="structboost_1_1hana_1_1basic__tuple__tag.html" title="Tag representing hana::basic_tuple.">basic_tuple_tag</a>></code>; provided for convenience. </p>
- <h2>Example </h2>
- <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="basic__tuple_8hpp.html">boost/hana/basic_tuple.hpp</a>></span></div><div class="line"><span class="preprocessor">#include <<a class="code" href="core_2make_8hpp.html">boost/hana/core/make.hpp</a>></span></div><div class="line"></div><div class="line"><span class="preprocessor">#include <type_traits></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">constexpr hana::basic_tuple<int, char, double> xs{1, <span class="charliteral">'2'</span>, 3.3};</div><div class="line">constexpr <span class="keyword">auto</span> ys = hana::make<hana::basic_tuple_tag>(1, <span class="charliteral">'2'</span>, 3.3);</div><div class="line">constexpr <span class="keyword">auto</span> zs = hana::make_basic_tuple(1, <span class="charliteral">'2'</span>, 3.3);</div><div class="line"></div><div class="line">static_assert(std::is_same<decltype(ys), decltype(xs)>::<a class="code" href="group__group-Constant.html#ga1687520692a6b0c49e3a69de2980f388">value</a>, <span class="stringliteral">""</span>);</div><div class="line">static_assert(std::is_same<decltype(zs), decltype(xs)>::<a class="code" href="group__group-Constant.html#ga1687520692a6b0c49e3a69de2980f388">value</a>, <span class="stringliteral">""</span>);</div><div class="line"></div><div class="line"><span class="keywordtype">int</span> main() { }</div></div><!-- fragment -->
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