1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>Auxiliary Parsers</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="Spirit 2.5.8"> 8<link rel="up" href="../qi_parsers.html" title="Qi Parsers"> 9<link rel="prev" href="string.html" title="String Parsers"> 10<link rel="next" href="binary.html" title="Binary Parsers"> 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 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30<div class="informaltable"><table class="table"> 31<colgroup> 32<col> 33<col> 34<col> 35</colgroup> 36<thead><tr> 37<th> 38 <p> 39 Expression 40 </p> 41 </th> 42<th> 43 <p> 44 Attribute 45 </p> 46 </th> 47<th> 48 <p> 49 Description 50 </p> 51 </th> 52</tr></thead> 53<tbody> 54<tr> 55<td> 56 <p> 57 <a class="link" href="../../reference/auxiliary/eol.html" title="End of Line Parser (eol)"><code class="computeroutput"><span class="identifier">eol</span></code></a> 58 </p> 59 </td> 60<td> 61 <p> 62 <code class="computeroutput"><span class="identifier">Unused</span></code> 63 </p> 64 </td> 65<td> 66 <p> 67 Matches the end of line (<code class="computeroutput"><span class="special">\</span><span class="identifier">r</span></code> or <code class="computeroutput"><span class="special">\</span><span class="identifier">n</span></code> or <code class="computeroutput"><span class="special">\</span><span class="identifier">r</span><span class="special">\</span><span class="identifier">n</span></code>) 68 </p> 69 </td> 70</tr> 71<tr> 72<td> 73 <p> 74 <a class="link" href="../../reference/auxiliary/eoi.html" title="End of Input Parser (eoi)"><code class="computeroutput"><span class="identifier">eoi</span></code></a> 75 </p> 76 </td> 77<td> 78 <p> 79 <code class="computeroutput"><span class="identifier">Unused</span></code> 80 </p> 81 </td> 82<td> 83 <p> 84 Matches the end of input (first == last) 85 </p> 86 </td> 87</tr> 88<tr> 89<td> 90 <p> 91 <a class="link" href="../../reference/auxiliary/eps.html" title="Epsilon Parser (eps)"><code class="computeroutput"><span class="identifier">eps</span></code></a> 92 </p> 93 </td> 94<td> 95 <p> 96 <code class="computeroutput"><span class="identifier">Unused</span></code> 97 </p> 98 </td> 99<td> 100 <p> 101 Match an empty string 102 </p> 103 </td> 104</tr> 105<tr> 106<td> 107 <p> 108 <a class="link" href="../../reference/auxiliary/eps.html" title="Epsilon Parser (eps)"><code class="computeroutput"><span class="identifier">eps</span></code></a><code class="computeroutput"><span class="special">(</span><span class="identifier">b</span><span class="special">)</span></code> 109 </p> 110 </td> 111<td> 112 <p> 113 <code class="computeroutput"><span class="identifier">Unused</span></code> 114 </p> 115 </td> 116<td> 117 <p> 118 If <code class="computeroutput"><span class="identifier">b</span></code> is true, 119 match an empty string 120 </p> 121 </td> 122</tr> 123<tr> 124<td> 125 <p> 126 <a class="link" href="../../reference/auxiliary/lazy.html" title="Lazy Parser (lazy)"><code class="computeroutput"><span class="identifier">lazy</span></code></a><code class="computeroutput"><span class="special">(</span><span class="identifier">fp</span><span class="special">)</span></code> 127 </p> 128 </td> 129<td> 130 <p> 131 Attribute of <code class="computeroutput"><span class="identifier">P</span></code> 132 where <code class="computeroutput"><span class="identifier">P</span></code> is 133 the return type of <code class="computeroutput"><span class="identifier">fp</span></code> 134 </p> 135 </td> 136<td> 137 <p> 138 Invoke <code class="computeroutput"><span class="identifier">fp</span></code> at 139 parse time, returning a parser <code class="computeroutput"><span class="identifier">p</span></code> 140 which is then called to parse. 141 </p> 142 </td> 143</tr> 144<tr> 145<td> 146 <p> 147 <code class="computeroutput"><span class="identifier">fp</span></code> 148 </p> 149 </td> 150<td> 151 <p> 152 see <code class="computeroutput"><span class="identifier">lazy</span><span class="special">(</span><span class="identifier">fp</span><span class="special">)</span></code> 153 above 154 </p> 155 </td> 156<td> 157 <p> 158 Equivalent to <code class="computeroutput"><span class="identifier">lazy</span><span class="special">(</span><span class="identifier">fp</span><span class="special">)</span></code> 159 </p> 160 </td> 161</tr> 162<tr> 163<td> 164 <p> 165 <a class="link" href="../../reference/auxiliary/attr.html" title="Attribute Parser (attr)"><code class="computeroutput"><span class="identifier">attr</span><span class="special">(</span><span class="identifier">attrib</span><span class="special">)</span></code></a> 166 </p> 167 </td> 168<td> 169 <p> 170 <code class="computeroutput"><span class="identifier">Attrib</span></code> 171 </p> 172 </td> 173<td> 174 <p> 175 Doesn't consume/parse any input, but exposes the argument 176 <code class="computeroutput"><span class="identifier">attrib</span></code> as its 177 attribute. 178 </p> 179 </td> 180</tr> 181</tbody> 182</table></div> 183</div> 184<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 185<td align="left"></td> 186<td align="right"><div class="copyright-footer">Copyright © 2001-2011 Joel de Guzman, Hartmut Kaiser<p> 187 Distributed under the Boost Software License, Version 1.0. (See accompanying 188 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>) 189 </p> 190</div></td> 191</tr></table> 192<hr> 193<div class="spirit-nav"> 194<a accesskey="p" href="string.html"><img src="../../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../qi_parsers.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="binary.html"><img src="../../../../../../../../doc/src/images/next.png" alt="Next"></a> 195</div> 196</body> 197</html> 198
