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<div class="headertitle"><div class="title">meta::defer< C, Ts > Struct Template Reference<div class="ingroups"><a class="el" href="group__meta.html">Meta</a> » <a class="el" href="group__trait.html">Trait</a> » <a class="el" href="group__invocation.html">Invocation</a></div></div></div>
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<p>A wrapper that defers the instantiation of a template <code>C</code> with type parameters <code>Ts</code> in a <code>lambda</code> or <code>let</code> expression.
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<a href="structmeta_1_1defer.html#details">More...</a></p>
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<p><code>#include <meta/meta.hpp></code></p>
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<img id="dynsection-0-trigger" src="closed.png" alt="+"/> Inheritance diagram for meta::defer< C, Ts >:</div>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
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<div class="textblock"><div class="compoundTemplParams">template<template< typename... > class C, typename... Ts><br />
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struct meta::defer< C, Ts ></div><p >A wrapper that defers the instantiation of a template <code>C</code> with type parameters <code>Ts</code> in a <code>lambda</code> or <code>let</code> expression. </p>
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<p >In the code below, the lambda would ideally be written as <code>lambda<_a,_b,push_back<_a,_b>></code>, however this fails since <code>push_back</code> expects its first argument to be a list, not a placeholder. Instead, we express it using <code>defer</code> as follows:</p>
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<div class="fragment"><div class="line"><span class="keyword">template</span> <<span class="keyword">typename</span> L></div>
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<div class="line"><span class="keyword">using </span><a class="code hl_typedef" href="group__transformation.html#gafb5c3e09e2b1dee384fee44fe54f7df9">reverse</a> = <a class="code hl_typedef" href="group__transformation.html#ga731ad47dfb1f72563fdad66fa5ae2a1a">reverse_fold<L, list<></a>, <a class="code hl_typedef" href="group__trait.html#gad34f270fe54eeffd113b91f56af6cd6f">lambda<_a, _b, defer<push_back, _a, _b></a>>>;</div>
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<div class="ttc" id="agroup__trait_html_gad34f270fe54eeffd113b91f56af6cd6f"><div class="ttname"><a href="group__trait.html#gad34f270fe54eeffd113b91f56af6cd6f">meta::lambda</a></div><div class="ttdeci">detail::lambda_< list< Ts... > > lambda</div><div class="ttdoc">For creating anonymous Invocables.</div><div class="ttdef"><b>Definition:</b> meta.hpp:3592</div></div>
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<div class="ttc" id="agroup__transformation_html_ga731ad47dfb1f72563fdad66fa5ae2a1a"><div class="ttname"><a href="group__transformation.html#ga731ad47dfb1f72563fdad66fa5ae2a1a">meta::reverse_fold</a></div><div class="ttdeci">_t< detail::reverse_fold_< L, State, Fn > > reverse_fold</div><div class="ttdoc">Return a new meta::list constructed by doing a right fold of the list L using binary invocable Fn and...</div><div class="ttdef"><b>Definition:</b> meta.hpp:1661</div></div>
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<div class="ttc" id="agroup__transformation_html_gafb5c3e09e2b1dee384fee44fe54f7df9"><div class="ttname"><a href="group__transformation.html#gafb5c3e09e2b1dee384fee44fe54f7df9">meta::reverse</a></div><div class="ttdeci">_t< detail::reverse_< L > > reverse</div><div class="ttdoc">Return a new meta::list by reversing the elements in the list L.</div><div class="ttdef"><b>Definition:</b> meta.hpp:2996</div></div>
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<li class="navelem"><a class="el" href="namespacemeta.html">meta</a></li><li class="navelem"><a class="el" href="structmeta_1_1defer.html">defer</a></li>
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