1<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 2<HTML> 3<HEAD> 4 <TITLE>OptimallyBuffered</TITLE> 5 <LINK REL="stylesheet" HREF="../../../../boost.css"> 6 <LINK REL="stylesheet" HREF="../theme/iostreams.css"> 7</HEAD> 8<BODY> 9 10<!-- Begin Banner --> 11 12 <H1 CLASS="title">OptimallyBuffered</H1> 13 <HR CLASS="banner"> 14 15<!-- End Banner --> 16 17<H2>Description</H2> 18 19<P> 20 A OptimallyBuffered Filter or Device provides a way for the Iostreams library to determine the best size of buffer to allocate for it if the user doesn't explicitly specify a buffer size. 21</P> 22 23<H2>Refinement of</H2> 24 25<A NAME="types"></A> 26<H2>Associated Types</H2> 27 28<H2>Notation</H2> 29 30<TABLE CELLPADDING="2"> 31 <TR><TD><CODE>O</CODE></TD><TD>-</TD><TD>A type which is a model of OptimallyBuffered</TD></TR> 32 <TR><TD><CODE>o</CODE></TD><TD>-</TD><TD>Object of type <CODE>O</CODE></TD></TR> 33 <TR><TD><CODE>io</CODE></TD><TD>-</TD><TD>Alias for namespace <CODE>boost::iostreams</CODE></TD></TR> 34</TABLE> 35 36<H2>Valid Expressions / Semantics</H2> 37 38<TABLE CELLPADDING="5" BORDER="1"> 39 <TR><TH>Expression</TH><TH>Expression Type</TH><TH>Semantics</TH></TR> 40 <TR> 41 <TD> 42 <PRE CLASS="plain_code"><CODE><A HREF="../functions/optimal_buffer_size.html">io::optimal_buffer_size</A>(o)</CODE></PRE> 43 </TD> 44 <TD><CODE>std::streamsize</CODE></TD> 45 <TD>Returns the size of buffer that should be allocated for <CODE>o</CODE> if the user has not explicitly specified a buffer size.</TD> 46 </TR> 47</TABLE> 48 49<H2>Models</H2> 50<UL> 51 <LI><A HREF="../classes/counter.html"><CODE>basic_counter</CODE></A> 52</UL> 53 54<!-- Begin Footer --> 55 56<HR> 57 58<P CLASS="copyright">© Copyright 2008 <a href="http://www.coderage.com/" target="_top">CodeRage, LLC</a><br/>© Copyright 2004-2007 <a href="https://www.boost.org/users/people/jonathan_turkanis.html" target="_top">Jonathan Turkanis</a></P> 59<P CLASS="copyright"> 60 Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at <A HREF="http://www.boost.org/LICENSE_1_0.txt">http://www.boost.org/LICENSE_1_0.txt</A>) 61</P> 62 63<!-- End Footer --> 64 65</BODY>