1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>basic_flat_buffer::reserve</title> 5<link rel="stylesheet" href="../../../../../../../doc/src/boostbook.css" type="text/css"> 6<meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> 7<link rel="home" href="../../../index.html" title="Chapter 1. Boost.Beast"> 8<link rel="up" href="../boost__beast__basic_flat_buffer.html" title="basic_flat_buffer"> 9<link rel="prev" href="max_size/overload2.html" title="basic_flat_buffer::max_size (2 of 2 overloads)"> 10<link rel="next" href="shrink_to_fit.html" title="basic_flat_buffer::shrink_to_fit"> 11</head> 12<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> 13<table cellpadding="2" width="100%"><tr> 14<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../../boost.png"></td> 15<td align="center"><a href="../../../../../../../index.html">Home</a></td> 16<td align="center"><a href="../../../../../../../libs/libraries.htm">Libraries</a></td> 17<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> 18<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> 19<td align="center"><a href="../../../../../../../more/index.htm">More</a></td> 20</tr></table> 21<hr> 22<div class="spirit-nav"> 23<a accesskey="p" href="max_size/overload2.html"><img src="../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../boost__beast__basic_flat_buffer.html"><img src="../../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="shrink_to_fit.html"><img src="../../../../../../../doc/src/images/next.png" alt="Next"></a> 24</div> 25<div class="section"> 26<div class="titlepage"><div><div><h5 class="title"> 27<a name="beast.ref.boost__beast__basic_flat_buffer.reserve"></a><a class="link" href="reserve.html" title="basic_flat_buffer::reserve">basic_flat_buffer::reserve</a> 28</h5></div></div></div> 29<p> 30 <a class="indexterm" name="idm46057549246032"></a> 31 </p> 32<p> 33 Guarantee a minimum capacity. 34 </p> 35<h6> 36<a name="beast.ref.boost__beast__basic_flat_buffer.reserve.h0"></a> 37 <span class="phrase"><a name="beast.ref.boost__beast__basic_flat_buffer.reserve.synopsis"></a></span><a class="link" href="reserve.html#beast.ref.boost__beast__basic_flat_buffer.reserve.synopsis">Synopsis</a> 38 </h6> 39<pre class="programlisting"><span class="keyword">void</span> 40<span class="identifier">reserve</span><span class="special">(</span> 41 <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">n</span><span class="special">);</span> 42</pre> 43<h6> 44<a name="beast.ref.boost__beast__basic_flat_buffer.reserve.h1"></a> 45 <span class="phrase"><a name="beast.ref.boost__beast__basic_flat_buffer.reserve.description"></a></span><a class="link" href="reserve.html#beast.ref.boost__beast__basic_flat_buffer.reserve.description">Description</a> 46 </h6> 47<p> 48 This function adjusts the internal storage (if necessary) to guarantee 49 space for at least <code class="computeroutput"><span class="identifier">n</span></code> bytes. 50 Buffer sequences previously obtained using <a class="link" href="data/overload1.html" title="basic_flat_buffer::data (1 of 2 overloads)"><code class="computeroutput"><span class="identifier">data</span></code></a> or <a class="link" href="prepare.html" title="basic_flat_buffer::prepare"><code class="computeroutput"><span class="identifier">prepare</span></code></a> become invalid. 51 </p> 52<h6> 53<a name="beast.ref.boost__beast__basic_flat_buffer.reserve.h2"></a> 54 <span class="phrase"><a name="beast.ref.boost__beast__basic_flat_buffer.reserve.parameters"></a></span><a class="link" href="reserve.html#beast.ref.boost__beast__basic_flat_buffer.reserve.parameters">Parameters</a> 55 </h6> 56<div class="informaltable"><table class="table"> 57<colgroup> 58<col> 59<col> 60</colgroup> 61<thead><tr> 62<th> 63 <p> 64 Name 65 </p> 66 </th> 67<th> 68 <p> 69 Description 70 </p> 71 </th> 72</tr></thead> 73<tbody><tr> 74<td> 75 <p> 76 <code class="computeroutput"><span class="identifier">n</span></code> 77 </p> 78 </td> 79<td> 80 <p> 81 The minimum number of byte for the new capacity. If this value 82 is greater than the maximum size, then the maximum size will 83 be adjusted upwards to this value. 84 </p> 85 </td> 86</tr></tbody> 87</table></div> 88<h6> 89<a name="beast.ref.boost__beast__basic_flat_buffer.reserve.h3"></a> 90 <span class="phrase"><a name="beast.ref.boost__beast__basic_flat_buffer.reserve.exception_safety"></a></span><a class="link" href="reserve.html#beast.ref.boost__beast__basic_flat_buffer.reserve.exception_safety">Exception 91 Safety</a> 92 </h6> 93<p> 94 Basic guarantee. 95 </p> 96<h6> 97<a name="beast.ref.boost__beast__basic_flat_buffer.reserve.h4"></a> 98 <span class="phrase"><a name="beast.ref.boost__beast__basic_flat_buffer.reserve.exceptions"></a></span><a class="link" href="reserve.html#beast.ref.boost__beast__basic_flat_buffer.reserve.exceptions">Exceptions</a> 99 </h6> 100<div class="informaltable"><table class="table"> 101<colgroup> 102<col> 103<col> 104</colgroup> 105<thead><tr> 106<th> 107 <p> 108 Type 109 </p> 110 </th> 111<th> 112 <p> 113 Thrown On 114 </p> 115 </th> 116</tr></thead> 117<tbody><tr> 118<td> 119 <p> 120 <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">length_error</span></code> 121 </p> 122 </td> 123<td> 124 <p> 125 if n is larger than the maximum allocation size of the allocator. 126 </p> 127 </td> 128</tr></tbody> 129</table></div> 130</div> 131<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 132<td align="left"></td> 133<td align="right"><div class="copyright-footer">Copyright © 2016-2019 Vinnie 134 Falco<p> 135 Distributed under the Boost Software License, Version 1.0. (See accompanying 136 file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) 137 </p> 138</div></td> 139</tr></table> 140<hr> 141<div class="spirit-nav"> 142<a accesskey="p" href="max_size/overload2.html"><img src="../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../boost__beast__basic_flat_buffer.html"><img src="../../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="shrink_to_fit.html"><img src="../../../../../../../doc/src/images/next.png" alt="Next"></a> 143</div> 144</body> 145</html> 146
