1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>Parser Directives Forcing Atomic Assignment (as<T>, as_string[], as_wstring[])</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="../directive.html" title="Parser Directives"> 9<link rel="prev" href="hold.html" title="Parser Directive for Attribute Commit/Rollback (hold[])"> 10<link rel="next" href="expect.html" title="Expectation Directive (expect[])"> 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="hold.html"><img src="../../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../directive.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="expect.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="spirit.qi.reference.directive.as"></a><a class="link" href="as.html" title="Parser Directives Forcing Atomic Assignment (as<T>, as_string[], as_wstring[])">Parser Directives 28 Forcing Atomic Assignment (<code class="computeroutput"><span class="identifier">as</span><span class="special"><</span><span class="identifier">T</span><span class="special">>,</span> <span class="identifier">as_string</span><span class="special">[],</span> <span class="identifier">as_wstring</span><span class="special">[]</span></code>)</a> 29</h5></div></div></div> 30<h6> 31<a name="spirit.qi.reference.directive.as.h0"></a> 32 <span class="phrase"><a name="spirit.qi.reference.directive.as.description"></a></span><a class="link" href="as.html#spirit.qi.reference.directive.as.description">Description</a> 33 </h6> 34<p> 35 The <code class="computeroutput"><span class="identifier">as</span><span class="special"><</span><span class="identifier">T</span><span class="special">></span></code> 36 class forces the atomic assignment of it's subject's synthesized attribute. 37 Usually, repetitive parsers (such as <a class="link" href="../operator/kleene.html" title="Kleene Parser (*a)">Kleene</a>, 38 etc) or sequences exposing a <code class="computeroutput"><span class="identifier">vector</span><span class="special"><</span><span class="identifier">A</span><span class="special">></span></code> will assign elements to the container 39 supplied as their synthesized attribute by calling <a class="link" href="../../../advanced/customize/store_value/push_back.html" title="Store a Parsed Attribute Value into a Container (Qi)"><code class="computeroutput"><span class="identifier">traits</span><span class="special">::</span><span class="identifier">push_back_container</span></code></a> repeatedly. 40 In some cases, this may be undesirable. The <code class="computeroutput"><span class="identifier">as</span><span class="special"><</span><span class="identifier">T</span><span class="special">></span></code> class creates a directive that will 41 pass a temporary object of type <code class="computeroutput"><span class="identifier">T</span></code> 42 to it's subject. If the subject parser passes, the temporary object will 43 be assigned to the directive's supplied attribute with a single call 44 to <a class="link" href="../../../advanced/customize/assign_to.html" title="Store a Parsed Attribute Value (Qi)"><code class="computeroutput"><span class="identifier">traits</span><span class="special">::</span><span class="identifier">assign_to</span></code></a>. If the subject parser 45 fails, the directive's attribute is not mutated. 46 </p> 47<div class="note"><table border="0" summary="Note"> 48<tr> 49<td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../images/note.png"></td> 50<th align="left">Note</th> 51</tr> 52<tr><td align="left" valign="top"><p> 53 <code class="computeroutput"><span class="identifier">T</span></code> is required to be 54 a container type. If <a class="link" href="../../../advanced/customize/is_container.html" title="Determine if a Type Should be Treated as a Container (Qi and Karma)"><code class="computeroutput"><span class="identifier">traits</span><span class="special">::</span><span class="identifier">is_container</span></code></a> does not return 55 true for <code class="computeroutput"><span class="identifier">T</span></code>, a compile-time 56 error will occur. 57 </p></td></tr> 58</table></div> 59<div class="note"><table border="0" summary="Note"> 60<tr> 61<td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../images/note.png"></td> 62<th align="left">Note</th> 63</tr> 64<tr><td align="left" valign="top"><p> 65 The <code class="computeroutput"><span class="identifier">as</span><span class="special"><</span><span class="identifier">T</span><span class="special">></span></code> 66 implicitly causes commit/rollback semantics similar in nature to the 67 <a class="link" href="hold.html" title="Parser Directive for Attribute Commit/Rollback (hold[])"><code class="computeroutput"><span class="identifier">hold</span></code></a> 68 directive. 69 </p></td></tr> 70</table></div> 71<div class="caution"><table border="0" summary="Caution"> 72<tr> 73<td rowspan="2" align="center" valign="top" width="25"><img alt="[Caution]" src="../../../../images/caution.png"></td> 74<th align="left">Caution</th> 75</tr> 76<tr><td align="left" valign="top"><p> 77 The <a class="link" href="../../../advanced/customize/assign_to.html" title="Store a Parsed Attribute Value (Qi)"><code class="computeroutput"><span class="identifier">traits</span><span class="special">::</span><span class="identifier">assign_to</span></code></a> customization point 78 may end up using <a class="link" href="../../../advanced/customize/store_value/push_back.html" title="Store a Parsed Attribute Value into a Container (Qi)"><code class="computeroutput"><span class="identifier">traits</span><span class="special">::</span><span class="identifier">push_back_container</span></code></a> to assign 79 the temporary object to the supplied attribute by default, depending 80 on the types involved. Use the interface described in <a class="link" href="../../../advanced/customize.html" title="Customization of Spirit's Attribute Handling">Customization 81 of Attribute Handling</a> to manipulate the semantics of this assignment 82 operation. 83 </p></td></tr> 84</table></div> 85<h6> 86<a name="spirit.qi.reference.directive.as.h1"></a> 87 <span class="phrase"><a name="spirit.qi.reference.directive.as.header"></a></span><a class="link" href="as.html#spirit.qi.reference.directive.as.header">Header</a> 88 </h6> 89<pre class="programlisting"><span class="comment">// forwards to <boost/spirit/home/qi/directive/as.hpp></span> 90<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">spirit</span><span class="special">/</span><span class="identifier">include</span><span class="special">/</span><span class="identifier">qi_as</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> 91</pre> 92<p> 93 Also, see <a class="link" href="../../../structure/include.html" title="Include">Include Structure</a>. 94 </p> 95<h6> 96<a name="spirit.qi.reference.directive.as.h2"></a> 97 <span class="phrase"><a name="spirit.qi.reference.directive.as.namespace"></a></span><a class="link" href="as.html#spirit.qi.reference.directive.as.namespace">Namespace</a> 98 </h6> 99<div class="informaltable"><table class="table"> 100<colgroup><col></colgroup> 101<thead><tr><th> 102 <p> 103 Name 104 </p> 105 </th></tr></thead> 106<tbody> 107<tr><td> 108 <p> 109 <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">spirit</span><span class="special">::</span><span class="identifier">as</span> <span class="comment">// alias: 110 boost::spirit::qi::as</span></code> 111 </p> 112 </td></tr> 113<tr><td> 114 <p> 115 <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">spirit</span><span class="special">::</span><span class="identifier">as_string</span> <span class="comment">// 116 alias: boost::spirit::qi::as_string</span></code> 117 </p> 118 </td></tr> 119<tr><td> 120 <p> 121 <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">spirit</span><span class="special">::</span><span class="identifier">as_wstring</span> <span class="comment">// 122 alias: boost::spirit::qi::as_wstring</span></code> 123 </p> 124 </td></tr> 125</tbody> 126</table></div> 127<h6> 128<a name="spirit.qi.reference.directive.as.h3"></a> 129 <span class="phrase"><a name="spirit.qi.reference.directive.as.synopsis"></a></span><a class="link" href="as.html#spirit.qi.reference.directive.as.synopsis">Synopsis</a> 130 </h6> 131<pre class="programlisting"><span class="keyword">template</span> <span class="special"><</span><span class="keyword">typename</span> <span class="identifier">T</span><span class="special">></span> 132<span class="keyword">struct</span> <span class="identifier">as</span><span class="special">;</span> 133</pre> 134<h6> 135<a name="spirit.qi.reference.directive.as.h4"></a> 136 <span class="phrase"><a name="spirit.qi.reference.directive.as.template_parameters"></a></span><a class="link" href="as.html#spirit.qi.reference.directive.as.template_parameters">Template 137 parameters</a> 138 </h6> 139<div class="informaltable"><table class="table"> 140<colgroup> 141<col> 142<col> 143</colgroup> 144<thead><tr> 145<th> 146 <p> 147 Parameter 148 </p> 149 </th> 150<th> 151 <p> 152 Description 153 </p> 154 </th> 155<th> 156 <p> 157 Default 158 </p> 159 </th> 160</tr></thead> 161<tbody><tr> 162<td> 163 <p> 164 <code class="computeroutput"><span class="identifier">T</span></code> 165 </p> 166 </td> 167<td> 168 <p> 169 A container type. [none 170 </p> 171 </td> 172</tr></tbody> 173</table></div> 174<h6> 175<a name="spirit.qi.reference.directive.as.h5"></a> 176 <span class="phrase"><a name="spirit.qi.reference.directive.as.model_of"></a></span><a class="link" href="as.html#spirit.qi.reference.directive.as.model_of">Model 177 of</a> 178 </h6> 179<div class="blockquote"><blockquote class="blockquote"><p> 180 <a class="link" href="../parser_concepts/unaryparser.html" title="UnaryParser"><code class="computeroutput"><span class="identifier">UnaryParser</span></code></a> 181 </p></blockquote></div> 182<div class="variablelist"> 183<p class="title"><b>Notation</b></p> 184<dl class="variablelist"> 185<dt><span class="term"><code class="computeroutput"><span class="identifier">a</span></code></span></dt> 186<dd><p> 187 A <a class="link" href="../parser_concepts/parser.html" title="Parser"><code class="computeroutput"><span class="identifier">Parser</span></code></a>. 188 </p></dd> 189<dt><span class="term"><code class="computeroutput"><span class="identifier">t</span></code></span></dt> 190<dd><p> 191 A container of type <code class="computeroutput"><span class="identifier">T</span></code>. 192 </p></dd> 193<dt><span class="term"><code class="computeroutput"><span class="identifier">attr</span></code></span></dt> 194<dd><p> 195 The attribute supplied to the directive. 196 </p></dd> 197</dl> 198</div> 199<h6> 200<a name="spirit.qi.reference.directive.as.h6"></a> 201 <span class="phrase"><a name="spirit.qi.reference.directive.as.expression_semantics"></a></span><a class="link" href="as.html#spirit.qi.reference.directive.as.expression_semantics">Expression 202 Semantics</a> 203 </h6> 204<p> 205 Semantics of an expression is defined only where it differs from, or 206 is not defined in <a class="link" href="../parser_concepts/unaryparser.html" title="UnaryParser"><code class="computeroutput"><span class="identifier">UnaryParser</span></code></a>. 207 </p> 208<div class="informaltable"><table class="table"> 209<colgroup> 210<col> 211<col> 212</colgroup> 213<thead><tr> 214<th> 215 <p> 216 Expression 217 </p> 218 </th> 219<th> 220 <p> 221 Semantics 222 </p> 223 </th> 224</tr></thead> 225<tbody> 226<tr> 227<td> 228 <p> 229 <code class="computeroutput"><span class="identifier">as</span><span class="special"><</span><span class="identifier">T</span><span class="special">>()[</span><span class="identifier">a</span><span class="special">]</span></code> 230 </p> 231 </td> 232<td> 233 <p> 234 Create a temporary object of <code class="computeroutput"><span class="identifier">t</span></code> 235 of type <code class="computeroutput"><span class="identifier">T</span></code>, 236 and invoke the subject parser <code class="computeroutput"><span class="identifier">a</span></code>, 237 supplying <code class="computeroutput"><span class="identifier">t</span></code> 238 as an attribute. If the subject parser passes, assign <code class="computeroutput"><span class="identifier">t</span></code> to <code class="computeroutput"><span class="identifier">attr</span></code>. 239 </p> 240 </td> 241</tr> 242<tr> 243<td> 244 <p> 245 <code class="computeroutput"><span class="identifier">as_string</span><span class="special">[</span><span class="identifier">a</span><span class="special">]</span></code> 246 </p> 247 </td> 248<td> 249 <p> 250 Equivalent to <code class="computeroutput"><span class="identifier">as</span><span class="special"><</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">>()[</span><span class="identifier">a</span><span class="special">]</span></code> 251 </p> 252 </td> 253</tr> 254<tr> 255<td> 256 <p> 257 <code class="computeroutput"><span class="identifier">as_wstring</span><span class="special">[</span><span class="identifier">a</span><span class="special">]</span></code> 258 </p> 259 </td> 260<td> 261 <p> 262 Equivalent to <code class="computeroutput"><span class="identifier">as</span><span class="special"><</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">wstring</span><span class="special">>()[</span><span class="identifier">a</span><span class="special">]</span></code> 263 </p> 264 </td> 265</tr> 266</tbody> 267</table></div> 268<h6> 269<a name="spirit.qi.reference.directive.as.h7"></a> 270 <span class="phrase"><a name="spirit.qi.reference.directive.as.attributes"></a></span><a class="link" href="as.html#spirit.qi.reference.directive.as.attributes">Attributes</a> 271 </h6> 272<p> 273 See <a class="link" href="../../quick_reference/compound_attribute_rules.html#spirit.qi.quick_reference.compound_attribute_rules.notation">Compound 274 Attribute Notation</a>. 275 </p> 276<div class="informaltable"><table class="table"> 277<colgroup> 278<col> 279<col> 280</colgroup> 281<thead><tr> 282<th> 283 <p> 284 Expression 285 </p> 286 </th> 287<th> 288 <p> 289 Attribute 290 </p> 291 </th> 292</tr></thead> 293<tbody><tr> 294<td> 295 <p> 296 <code class="computeroutput"><span class="identifier">as</span><span class="special"><</span><span class="identifier">T</span><span class="special">>()[</span><span class="identifier">a</span><span class="special">]</span></code> 297 </p> 298 </td> 299<td> 300 <p> 301 <code class="computeroutput"><span class="identifier">a</span><span class="special">:</span> 302 <span class="identifier">A</span> <span class="special">--></span> 303 <span class="identifier">as</span><span class="special"><</span><span class="identifier">T</span><span class="special">>()[</span><span class="identifier">a</span><span class="special">]:</span> 304 <span class="identifier">T</span></code> 305 </p> 306 </td> 307</tr></tbody> 308</table></div> 309<h6> 310<a name="spirit.qi.reference.directive.as.h8"></a> 311 <span class="phrase"><a name="spirit.qi.reference.directive.as.complexity"></a></span><a class="link" href="as.html#spirit.qi.reference.directive.as.complexity">Complexity</a> 312 </h6> 313<div class="blockquote"><blockquote class="blockquote"><p> 314 The complexity is defined by the complexity of the subject parser, 315 <code class="computeroutput"><span class="identifier">a</span></code>, and the complexity 316 of the assignment of the container <code class="computeroutput"><span class="identifier">t</span></code> 317 to the supplied attribute <code class="computeroutput"><span class="identifier">attr</span></code>. 318 </p></blockquote></div> 319<h6> 320<a name="spirit.qi.reference.directive.as.h9"></a> 321 <span class="phrase"><a name="spirit.qi.reference.directive.as.example"></a></span><a class="link" href="as.html#spirit.qi.reference.directive.as.example">Example</a> 322 </h6> 323<div class="note"><table border="0" summary="Note"> 324<tr> 325<td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../images/note.png"></td> 326<th align="left">Note</th> 327</tr> 328<tr><td align="left" valign="top"><p> 329 The test harness for the example(s) below is presented in the <a class="link" href="../basics.html#spirit.qi.reference.basics.examples">Basics Examples</a> 330 section. 331 </p></td></tr> 332</table></div> 333<p> 334 Some using declarations: 335 </p> 336<p> 337</p> 338<pre class="programlisting"><span class="keyword">using</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">spirit</span><span class="special">::</span><span class="identifier">utree</span><span class="special">;</span> 339<span class="keyword">using</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">spirit</span><span class="special">::</span><span class="identifier">utree_type</span><span class="special">;</span> 340<span class="keyword">using</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">spirit</span><span class="special">::</span><span class="identifier">utf8_symbol_type</span><span class="special">;</span> 341<span class="keyword">using</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">spirit</span><span class="special">::</span><span class="identifier">qi</span><span class="special">::</span><span class="identifier">as</span><span class="special">;</span> 342<span class="keyword">using</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">spirit</span><span class="special">::</span><span class="identifier">qi</span><span class="special">::</span><span class="identifier">as_string</span><span class="special">;</span> 343<span class="keyword">using</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">spirit</span><span class="special">::</span><span class="identifier">qi</span><span class="special">::</span><span class="identifier">char_</span><span class="special">;</span> 344</pre> 345<p> 346 </p> 347<p> 348 Simple usage of <code class="computeroutput"><span class="identifier">as</span><span class="special"><</span><span class="identifier">T</span><span class="special">></span></code>, 349 <code class="computeroutput"><span class="identifier">as_string</span></code> and <code class="computeroutput"><span class="identifier">as_wstring</span></code>: 350 </p> 351<p> 352 To properly handle string concatenation with <a class="link" href="../../../support/utree.html" title="The utree data structure"><code class="computeroutput"><span class="identifier">utree</span></code></a>, we make use of <code class="computeroutput"><span class="identifier">as_string</span><span class="special">[]</span></code>. 353 We also use <code class="computeroutput"><span class="identifier">as</span><span class="special"><</span><span class="identifier">T</span><span class="special">></span></code> 354 to explicitly create a <a class="link" href="../../../support/utree.html" title="The utree data structure"><code class="computeroutput"><span class="identifier">utree</span></code></a> symbol node. 355 </p> 356<p> 357</p> 358<pre class="programlisting"><span class="identifier">utree</span> <span class="identifier">ut</span><span class="special">;</span> 359 360<span class="keyword">typedef</span> <span class="identifier">as</span><span class="special"><</span><span class="identifier">utf8_symbol_type</span><span class="special">></span> <span class="identifier">as_symbol_type</span><span class="special">;</span> 361<span class="identifier">as_symbol_type</span> <span class="keyword">const</span> <span class="identifier">as_symbol</span> <span class="special">=</span> <span class="identifier">as_symbol_type</span><span class="special">();</span> 362 363<span class="identifier">test_parser_attr</span><span class="special">(</span><span class="string">"foo"</span><span class="special">,</span> <span class="identifier">as_string</span><span class="special">[*</span><span class="identifier">char_</span><span class="special">],</span> <span class="identifier">ut</span><span class="special">);</span> 364<span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="identifier">ut</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span> <span class="comment">// will output >"foo"<</span> 365<span class="identifier">BOOST_ASSERT</span><span class="special">(</span><span class="identifier">ut</span><span class="special">.</span><span class="identifier">which</span><span class="special">()</span> <span class="special">==</span> <span class="identifier">utree_type</span><span class="special">::</span><span class="identifier">string_type</span><span class="special">);</span> 366<span class="identifier">ut</span><span class="special">.</span><span class="identifier">clear</span><span class="special">();</span> 367 368<span class="identifier">test_parser_attr</span><span class="special">(</span><span class="string">"foo"</span><span class="special">,</span> <span class="identifier">as</span><span class="special"><</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">>()[*</span><span class="identifier">char_</span><span class="special">],</span> <span class="identifier">ut</span><span class="special">);</span> 369<span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="identifier">ut</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span> <span class="comment">// will output >"foo"<</span> 370<span class="identifier">BOOST_ASSERT</span><span class="special">(</span><span class="identifier">ut</span><span class="special">.</span><span class="identifier">which</span><span class="special">()</span> <span class="special">==</span> <span class="identifier">utree_type</span><span class="special">::</span><span class="identifier">string_type</span><span class="special">);</span> 371<span class="identifier">ut</span><span class="special">.</span><span class="identifier">clear</span><span class="special">();</span> 372 373<span class="identifier">test_parser_attr</span><span class="special">(</span><span class="string">"foo"</span><span class="special">,</span> <span class="identifier">as_symbol</span><span class="special">[*</span><span class="identifier">char_</span><span class="special">],</span> <span class="identifier">ut</span><span class="special">);</span> 374<span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="identifier">ut</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span> <span class="comment">// will output >foo<</span> 375<span class="identifier">BOOST_ASSERT</span><span class="special">(</span><span class="identifier">ut</span><span class="special">.</span><span class="identifier">which</span><span class="special">()</span> <span class="special">==</span> <span class="identifier">utree_type</span><span class="special">::</span><span class="identifier">symbol_type</span><span class="special">);</span> 376<span class="identifier">ut</span><span class="special">.</span><span class="identifier">clear</span><span class="special">();</span> 377 378<span class="identifier">test_parser_attr</span><span class="special">(</span><span class="string">"foo"</span><span class="special">,</span> <span class="identifier">as</span><span class="special"><</span><span class="identifier">utf8_symbol_type</span><span class="special">>()[*</span><span class="identifier">char_</span><span class="special">],</span> <span class="identifier">ut</span><span class="special">);</span> 379<span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="identifier">ut</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span> <span class="comment">// will output >foo<</span> 380<span class="identifier">BOOST_ASSERT</span><span class="special">(</span><span class="identifier">ut</span><span class="special">.</span><span class="identifier">which</span><span class="special">()</span> <span class="special">==</span> <span class="identifier">utree_type</span><span class="special">::</span><span class="identifier">symbol_type</span><span class="special">);</span> 381</pre> 382<p> 383 </p> 384</div> 385<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 386<td align="left"></td> 387<td align="right"><div class="copyright-footer">Copyright © 2001-2011 Joel de Guzman, Hartmut Kaiser<p> 388 Distributed under the Boost Software License, Version 1.0. (See accompanying 389 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>) 390 </p> 391</div></td> 392</tr></table> 393<hr> 394<div class="spirit-nav"> 395<a accesskey="p" href="hold.html"><img src="../../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../directive.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="expect.html"><img src="../../../../../../../../doc/src/images/next.png" alt="Next"></a> 396</div> 397</body> 398</html> 399
