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111 lines
4.5 KiB
HTML
Executable File
111 lines
4.5 KiB
HTML
Executable File
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<HTML>
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<HEAD>
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<TITLE>Class Template io_mode</TITLE>
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<LINK REL="stylesheet" HREF="../../../../boost.css">
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<LINK REL="stylesheet" HREF="../theme/iostreams.css">
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</HEAD>
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<BODY>
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<!-- Begin Banner -->
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<H1 CLASS="title">Class Template <CODE>io_mode</CODE></H1>
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<HR CLASS="banner">
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<!-- End Banner -->
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<DL class="page-index">
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<DT><A href="#description">Description</A></DT>
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<DT><A href="#headers">Headers</A></DT>
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<DT><A href="#reference">Reference</A></DT>
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</DL>
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<HR>
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<A NAME="description">
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<H2>Description</H2>
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<P><A HREF="http://www.boost.org/libs/mpl/doc/refmanual/metafunction.html" TARGET="_top">Metafunction</A> returning a <A HREF="../modes.html#mode_tags">mode tag</A> corresponding the the <A HREF="../modes.html">i/o mode</A> of a model of one of the <A HREF="../concepts.html#filter_concepts">Filter</A> or <A HREF="../concepts.html#device_concepts">Device</A> concepts or of a standard stream or stream buffer.</P>
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<A NAME="headers">
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<H2>Headers</H2>
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<DL class="page-index">
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<DT><A CLASS="header" HREF="../../../../boost/iostreams/traits.hpp"><CODE><boost/iostreams/traits.hpp></CODE></A></DT>
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</DL>
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<A NAME="reference">
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<H2>Reference</H2>
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<H4>Synopsis</H4>
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<PRE CLASS="broken_ie"><SPAN CLASS="keyword">namespace</SPAN> boost { <SPAN CLASS="keyword">namespace</SPAN> iostreams {
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<SPAN CLASS="keyword">template</SPAN><<SPAN CLASS="keyword">typename</SPAN> <A HREF="#template_params" CLASS="documented">T</A>>
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<SPAN CLASS="keyword">struct</SPAN> io_mode {
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<SPAN CLASS="keyword">typedef</SPAN> <SPAN CLASS="omitted">see below</SPAN> <A HREF="#type" CLASS="documented">type</A>;
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};
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} } <SPAN CLASS="comment">// End namespace boost::io</SPAN></PRE>
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<A NAME="template_params"></A>
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<H4>Template parameters</H4>
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<TABLE STYLE="margin-left:2em" BORDER=0 CELLPADDING=2>
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<TR>
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<TD VALIGN="top"><I>T</I></TD><TD WIDTH="2em" VALIGN="top">-</TD>
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<TD>A Model of one of the <A HREF="../concepts.html#filter_concepts">Filter</A> or <A HREF="../concepts.html#device_concepts">Device</A> concepts</TD>
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</TR>
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</TABLE>
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<A NAME="type"></A>
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<H4><CODE>mode::type</CODE></H4>
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<PRE CLASS="broken_ie"> <SPAN CLASS="keyword">typedef</SPAN> <SPAN CLASS="omitted">implementation-defined</SPAN> <A HREF="#type" CLASS="documented">type</A>;</PRE>
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<P>The most-derived <A HREF="../modes.html#mode_tags">mode tag</A> to which <A HREF="../traits.html#category"><CODE>io_category<T>::type</CODE></A> is convertible. If there is no such most-derived tag, a compile-time error occurs.</P>
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<P>Modes assigned to standard library types are displayed in the following table. For standard streams and stream buffers, if the i/o mode shown below does not acurately reflect a particular implementation, the function template <A HREF="../functions/adapt.html"><CODE>adapt</CODE></A> may be used.</P>
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<TABLE STYLE="margin-bottom:2em" BORDER=1 CELLPADDING=4>
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<TR><TH><CODE>T</CODE></TH><TH><CODE>category</CODE></TH></TR>
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<TR>
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<TD VALIGN="top"><A NAME="print_CR"></A>Specialization of <CODE>std::basic_iostream</CODE>, or derived from such a specialization</TD>
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<TD><CODE>seekable</CODE></TD>
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</TR>
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<TR>
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<TD VALIGN="top"><A NAME="print_CR"></A>Specialization of <CODE>std::basic_istream</CODE>, or derived from such a specialization</TD>
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<TD><CODE>input_seekable</CODE></TD>
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</TR>
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<TR>
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<TD VALIGN="top"><A NAME="print_CR"></A>Specialization of <CODE>std::basic_ostream</CODE>, or derived from such a specialization</TD>
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<TD><CODE>output_seekable</CODE></TD>
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</TR>
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<TR>
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<TD VALIGN="top"><A NAME="print_CR"></A>Specialization of <CODE>std::basic_streambuf</CODE>, or derived from such a specialization</TD>
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<TD><CODE>seekable</CODE></TD>
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</TR>
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<TR>
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<TD VALIGN="top"><A NAME="print_CR"></A>Specialization of <CODE>std::back_insert_iterator</CODE>, or derived from such a specialization</TD>
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<TD><CODE>output</CODE></TD>
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</TR>
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</TABLE>
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<!-- Begin Footer -->
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<HR>
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<P CLASS="copyright">Revised
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<!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan -->
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20 May, 2004
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<!--webbot bot="Timestamp" endspan i-checksum="38504" -->
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</P>
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<P CLASS="copyright">© Copyright Jonathan Turkanis, 2004</P>
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<P CLASS="copyright">
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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>)
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</P>
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