1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>Stream Parsers (stream, wstream, etc.)</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="../stream.html" title="Stream Parsers"> 9<link rel="prev" href="../stream.html" title="Stream Parsers"> 10<link rel="next" href="../string.html" title="String 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 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="../stream.html"><img src="../../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../stream.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="../string.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.stream.stream"></a><a class="link" href="stream.html" title="Stream Parsers (stream, wstream, etc.)">Stream Parsers 28 (<code class="computeroutput"><span class="identifier">stream</span></code>, <code class="computeroutput"><span class="identifier">wstream</span></code>, etc.)</a> 29</h5></div></div></div> 30<h6> 31<a name="spirit.qi.reference.stream.stream.h0"></a> 32 <span class="phrase"><a name="spirit.qi.reference.stream.stream.description"></a></span><a class="link" href="stream.html#spirit.qi.reference.stream.stream.description">Description</a> 33 </h6> 34<p> 35 The <code class="computeroutput"><span class="identifier">stream_parser</span></code> is 36 a primitive which allows to use pre-existing standard streaming operators 37 for input parsing integrated with <span class="emphasis"><em>Spirit.Qi</em></span>. It 38 provides a wrapper parser dispatching the underlying input stream to 39 the stream operator of the corresponding attribute type to be parsed. 40 Any value <code class="computeroutput"><span class="identifier">a</span></code> to be parsed 41 using the <code class="computeroutput"><span class="identifier">stream_parser</span></code> 42 will result in invoking the standard streaming operator for its type 43 <code class="computeroutput"><span class="identifier">A</span></code>, for instance: 44 </p> 45<pre class="programlisting"><span class="identifier">std</span><span class="special">::</span><span class="identifier">istream</span><span class="special">&</span> <span class="keyword">operator</span><span class="special">>></span> <span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">istream</span><span class="special">&,</span> <span class="identifier">A</span><span class="special">&);</span> 46</pre> 47<h6> 48<a name="spirit.qi.reference.stream.stream.h1"></a> 49 <span class="phrase"><a name="spirit.qi.reference.stream.stream.header"></a></span><a class="link" href="stream.html#spirit.qi.reference.stream.stream.header">Header</a> 50 </h6> 51<pre class="programlisting"><span class="comment">// forwards to <boost/spirit/home/qi/stream.hpp></span> 52<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_stream</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> 53</pre> 54<p> 55 Also, see <a class="link" href="../../../structure/include.html" title="Include">Include Structure</a>. 56 </p> 57<h6> 58<a name="spirit.qi.reference.stream.stream.h2"></a> 59 <span class="phrase"><a name="spirit.qi.reference.stream.stream.namespace"></a></span><a class="link" href="stream.html#spirit.qi.reference.stream.stream.namespace">Namespace</a> 60 </h6> 61<div class="informaltable"><table class="table"> 62<colgroup><col></colgroup> 63<thead><tr><th> 64 <p> 65 Name 66 </p> 67 </th></tr></thead> 68<tbody> 69<tr><td> 70 <p> 71 <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">spirit</span><span class="special">::</span><span class="identifier">stream</span> <span class="comment">// 72 alias: boost::spirit::qi::stream</span></code> 73 </p> 74 </td></tr> 75<tr><td> 76 <p> 77 <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">spirit</span><span class="special">::</span><span class="identifier">wstream</span> <span class="comment">// 78 alias: boost::spirit::qi::wstream</span></code> 79 </p> 80 </td></tr> 81</tbody> 82</table></div> 83<h6> 84<a name="spirit.qi.reference.stream.stream.h3"></a> 85 <span class="phrase"><a name="spirit.qi.reference.stream.stream.synopsis"></a></span><a class="link" href="stream.html#spirit.qi.reference.stream.stream.synopsis">Synopsis</a> 86 </h6> 87<pre class="programlisting"><span class="keyword">template</span> <span class="special"><</span><span class="keyword">typename</span> <span class="identifier">Char</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">Attrib</span><span class="special">></span> 88<span class="keyword">struct</span> <span class="identifier">stream_parser</span><span class="special">;</span> 89</pre> 90<h6> 91<a name="spirit.qi.reference.stream.stream.h4"></a> 92 <span class="phrase"><a name="spirit.qi.reference.stream.stream.template_parameters"></a></span><a class="link" href="stream.html#spirit.qi.reference.stream.stream.template_parameters">Template 93 parameters</a> 94 </h6> 95<div class="informaltable"><table class="table"> 96<colgroup> 97<col> 98<col> 99<col> 100</colgroup> 101<thead><tr> 102<th> 103 <p> 104 Parameter 105 </p> 106 </th> 107<th> 108 <p> 109 Description 110 </p> 111 </th> 112<th> 113 <p> 114 Default 115 </p> 116 </th> 117</tr></thead> 118<tbody> 119<tr> 120<td> 121 <p> 122 <code class="computeroutput"><span class="identifier">Char</span></code> 123 </p> 124 </td> 125<td> 126 <p> 127 The character type to use to generate the input. This type 128 will be used while assigning the generated characters to the 129 underlying input iterator. 130 </p> 131 </td> 132<td> 133 <p> 134 <code class="computeroutput"><span class="keyword">char</span></code> 135 </p> 136 </td> 137</tr> 138<tr> 139<td> 140 <p> 141 <code class="computeroutput"><span class="identifier">Attrib</span></code> 142 </p> 143 </td> 144<td> 145 <p> 146 The type of the attribute the <code class="computeroutput"><span class="identifier">stream_parser</span></code> 147 is expected to parse its input into. 148 </p> 149 </td> 150<td> 151 <p> 152 <code class="computeroutput"><span class="identifier">spirit</span><span class="special">::</span><span class="identifier">basic_hold_any</span><span class="special"><</span><span class="identifier">Char</span><span class="special">></span></code> 153 </p> 154 </td> 155</tr> 156</tbody> 157</table></div> 158<h6> 159<a name="spirit.qi.reference.stream.stream.h5"></a> 160 <span class="phrase"><a name="spirit.qi.reference.stream.stream.model_of"></a></span><a class="link" href="stream.html#spirit.qi.reference.stream.stream.model_of">Model 161 of</a> 162 </h6> 163<div class="blockquote"><blockquote class="blockquote"><p> 164 <a class="link" href="../parser_concepts/primitiveparser.html" title="PrimitiveParser"><code class="computeroutput"><span class="identifier">PrimitiveParser</span></code></a> 165 </p></blockquote></div> 166<div class="variablelist"> 167<p class="title"><b>Notation</b></p> 168<dl class="variablelist"> 169<dt><span class="term"><code class="computeroutput"><span class="identifier">s</span></code></span></dt> 170<dd><p> 171 A variable instance of any type with a defined matching streaming 172 <code class="computeroutput"><span class="keyword">operator</span><span class="special">>>()</span></code> 173 or a <a class="link" href="../basics.html#spirit.qi.reference.basics.lazy_argument">Lazy 174 Argument</a> that evaluates to any type with a defined matching 175 streaming <code class="computeroutput"><span class="keyword">operator</span><span class="special">>>()</span></code>. 176 </p></dd> 177</dl> 178</div> 179<h6> 180<a name="spirit.qi.reference.stream.stream.h6"></a> 181 <span class="phrase"><a name="spirit.qi.reference.stream.stream.expression_semantics"></a></span><a class="link" href="stream.html#spirit.qi.reference.stream.stream.expression_semantics">Expression 182 Semantics</a> 183 </h6> 184<p> 185 Semantics of an expression is defined only where it differs from, or 186 is not defined in <a class="link" href="../parser_concepts/primitiveparser.html" title="PrimitiveParser"><code class="computeroutput"><span class="identifier">PrimitiveParser</span></code></a>. 187 </p> 188<div class="informaltable"><table class="table"> 189<colgroup> 190<col> 191<col> 192</colgroup> 193<thead><tr> 194<th> 195 <p> 196 Expression 197 </p> 198 </th> 199<th> 200 <p> 201 Description 202 </p> 203 </th> 204</tr></thead> 205<tbody> 206<tr> 207<td> 208 <p> 209 <code class="computeroutput"><span class="identifier">stream</span></code> 210 </p> 211 </td> 212<td> 213 <p> 214 Call the streaming <code class="computeroutput"><span class="keyword">operator</span><span class="special">>>()</span></code> for the type of the 215 mandatory attribute. The input recognized by this operator 216 will be the result of the <code class="computeroutput"><span class="identifier">stream</span></code> 217 parser. This parser never fails (unless the underlying input 218 stream reports an error). The character type of the I/O istream 219 is assumed to be <code class="computeroutput"><span class="keyword">char</span></code>. 220 </p> 221 </td> 222</tr> 223<tr> 224<td> 225 <p> 226 <code class="computeroutput"><span class="identifier">wstream</span></code> 227 </p> 228 </td> 229<td> 230 <p> 231 Call the streaming <code class="computeroutput"><span class="keyword">operator</span><span class="special">>>()</span></code> for the type of the 232 mandatory attribute. The input recognized by this operator 233 will be the result of the <code class="computeroutput"><span class="identifier">wstream</span></code> 234 parser. This parser never fails (unless the underlying input 235 stream reports an error). The character type of the I/O istream 236 is assumed to be <code class="computeroutput"><span class="keyword">wchar_t</span></code>. 237 </p> 238 </td> 239</tr> 240</tbody> 241</table></div> 242<p> 243 All parsers listed in the table above are predefined specializations 244 of the <code class="computeroutput"><span class="identifier">stream_parser</span><span class="special"><</span><span class="identifier">Char</span><span class="special">></span></code> basic stream parser type described 245 below. It is possible to directly use this type to create stream parsers 246 using an arbitrary underlying character type. 247 </p> 248<div class="informaltable"><table class="table"> 249<colgroup> 250<col> 251<col> 252</colgroup> 253<thead><tr> 254<th> 255 <p> 256 Expression 257 </p> 258 </th> 259<th> 260 <p> 261 Semantics 262 </p> 263 </th> 264</tr></thead> 265<tbody><tr> 266<td> 267 <p> 268</p> 269<pre xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="table-programlisting"><span class="identifier">stream_parser</span><span class="special"><</span> 270 <span class="identifier">Char</span><span class="special">,</span> <span class="identifier">Attrib</span> 271<span class="special">>()</span></pre> 272<p> 273 </p> 274 </td> 275<td> 276 <p> 277 Call the streaming <code class="computeroutput"><span class="keyword">operator</span><span class="special">>>()</span></code> for the type of the 278 optional attribute, <code class="computeroutput"><span class="identifier">Attrib</span></code>. 279 The input recognized by this operator will be the result of 280 the <code class="computeroutput"><span class="identifier">stream_parser</span><span class="special"><></span></code> parser. This parser 281 never fails (unless the underlying input stream reports an 282 error). The character type of the I/O istream is assumed to 283 be <code class="computeroutput"><span class="identifier">Char</span></code> 284 </p> 285 </td> 286</tr></tbody> 287</table></div> 288<h6> 289<a name="spirit.qi.reference.stream.stream.h7"></a> 290 <span class="phrase"><a name="spirit.qi.reference.stream.stream.additional_requirements"></a></span><a class="link" href="stream.html#spirit.qi.reference.stream.stream.additional_requirements">Additional 291 Requirements</a> 292 </h6> 293<p> 294 All of the stream parsers listed above require the type of the value 295 to parse (the associated attribute) to implement a streaming operator 296 conforming to the usual I/O streams conventions (where <code class="computeroutput"><span class="identifier">attribute_type</span></code> is the type of the value 297 to recognize while parse): 298 </p> 299<pre class="programlisting"><span class="keyword">template</span> <span class="special"><</span><span class="keyword">typename</span> <span class="identifier">Istream</span><span class="special">></span> 300<span class="identifier">Istream</span><span class="special">&</span> <span class="keyword">operator</span><span class="special">>></span> <span class="special">(</span><span class="identifier">Istream</span><span class="special">&</span> <span class="identifier">os</span><span class="special">,</span> <span class="identifier">attribute_type</span><span class="special">&</span> <span class="identifier">attr</span><span class="special">)</span> 301<span class="special">{</span> 302 <span class="comment">// type specific input parsing</span> 303 <span class="keyword">return</span> <span class="identifier">os</span><span class="special">;</span> 304<span class="special">}</span> 305</pre> 306<p> 307 This operator will be called by the stream parsers to gather the input 308 for the attribute of type <code class="computeroutput"><span class="identifier">attribute_type</span></code>. 309 </p> 310<div class="note"><table border="0" summary="Note"> 311<tr> 312<td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../images/note.png"></td> 313<th align="left">Note</th> 314</tr> 315<tr><td align="left" valign="top"><p> 316 If the <code class="computeroutput"><span class="identifier">stream</span></code> parser 317 is invoked inside a <a class="link" href="../parse_api/stream_api.html" title="Stream Based Parser API"><code class="computeroutput"><span class="identifier">match</span></code></a> (or <a class="link" href="../parse_api/stream_api.html" title="Stream Based Parser API"><code class="computeroutput"><span class="identifier">phrase_match</span></code></a>) stream manipulator 318 the <code class="computeroutput"><span class="identifier">Istream</span></code> passed 319 to the <code class="computeroutput"><span class="keyword">operator</span><span class="special">>>()</span></code> 320 will have registered (imbued) the same standard locale instance as 321 the stream the <a class="link" href="../parse_api/stream_api.html" title="Stream Based Parser API"><code class="computeroutput"><span class="identifier">match</span></code></a> (or <a class="link" href="../parse_api/stream_api.html" title="Stream Based Parser API"><code class="computeroutput"><span class="identifier">phrase_match</span></code></a>) manipulator 322 has been used with. This ensures all facets registered (imbued) with 323 the original I/O stream object are used during input parsing. 324 </p></td></tr> 325</table></div> 326<h6> 327<a name="spirit.qi.reference.stream.stream.h8"></a> 328 <span class="phrase"><a name="spirit.qi.reference.stream.stream.attributes"></a></span><a class="link" href="stream.html#spirit.qi.reference.stream.stream.attributes">Attributes</a> 329 </h6> 330<div class="informaltable"><table class="table"> 331<colgroup> 332<col> 333<col> 334</colgroup> 335<thead><tr> 336<th> 337 <p> 338 Expression 339 </p> 340 </th> 341<th> 342 <p> 343 Attribute 344 </p> 345 </th> 346</tr></thead> 347<tbody> 348<tr> 349<td> 350 <p> 351 <code class="computeroutput"><span class="identifier">stream</span></code> 352 </p> 353 </td> 354<td> 355 <p> 356 <code class="computeroutput"><span class="identifier">spirit</span><span class="special">::</span><span class="identifier">hold_any</span></code> 357 </p> 358 </td> 359</tr> 360<tr> 361<td> 362 <p> 363 <code class="computeroutput"><span class="identifier">wstream</span></code> 364 </p> 365 </td> 366<td> 367 <p> 368 <code class="computeroutput"><span class="identifier">spirit</span><span class="special">::</span><span class="identifier">whold_any</span></code> 369 </p> 370 </td> 371</tr> 372<tr> 373<td> 374 <p> 375 <code class="computeroutput"><span class="identifier">stream_parser</span><span class="special"><</span><span class="identifier">Char</span><span class="special">,</span> <span class="identifier">Attrib</span><span class="special">>()</span></code> 376 </p> 377 </td> 378<td> 379 <p> 380 <code class="computeroutput"><span class="identifier">Attrib</span></code> 381 </p> 382 </td> 383</tr> 384</tbody> 385</table></div> 386<div class="important"><table border="0" summary="Important"> 387<tr> 388<td rowspan="2" align="center" valign="top" width="25"><img alt="[Important]" src="../../../../images/important.png"></td> 389<th align="left">Important</th> 390</tr> 391<tr><td align="left" valign="top"><p> 392 The attribute type <code class="computeroutput"><span class="identifier">spirit</span><span class="special">::</span><span class="identifier">hold_any</span></code> 393 exposed by some of the stream parsers is semantically and syntactically 394 equivalent to the type implemented by <a href="../../../../../../../../libs/any/index.html" target="_top">Boost.Any</a>. 395 It has been added to <span class="emphasis"><em>Spirit</em></span> as it has better performance 396 and a smaller footprint than <a href="../../../../../../../../libs/any/index.html" target="_top">Boost.Any</a>. 397 </p></td></tr> 398</table></div> 399<h6> 400<a name="spirit.qi.reference.stream.stream.h9"></a> 401 <span class="phrase"><a name="spirit.qi.reference.stream.stream.complexity"></a></span><a class="link" href="stream.html#spirit.qi.reference.stream.stream.complexity">Complexity</a> 402 </h6> 403<div class="blockquote"><blockquote class="blockquote"><p> 404 O(N), where N is the number of characters consumed by the stream parser 405 </p></blockquote></div> 406<h6> 407<a name="spirit.qi.reference.stream.stream.h10"></a> 408 <span class="phrase"><a name="spirit.qi.reference.stream.stream.example"></a></span><a class="link" href="stream.html#spirit.qi.reference.stream.stream.example">Example</a> 409 </h6> 410<div class="note"><table border="0" summary="Note"> 411<tr> 412<td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../images/note.png"></td> 413<th align="left">Note</th> 414</tr> 415<tr><td align="left" valign="top"><p> 416 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> 417 section. 418 </p></td></tr> 419</table></div> 420<p> 421 A class definition used in the examples: 422 </p> 423<p> 424</p> 425<pre class="programlisting"><span class="comment">// a simple complex number representation z = a + bi</span> 426<span class="keyword">struct</span> <span class="identifier">complex</span> 427<span class="special">{</span> 428 <span class="identifier">complex</span> <span class="special">(</span><span class="keyword">double</span> <span class="identifier">a</span> <span class="special">=</span> <span class="number">0.0</span><span class="special">,</span> <span class="keyword">double</span> <span class="identifier">b</span> <span class="special">=</span> <span class="number">0.0</span><span class="special">)</span> 429 <span class="special">:</span> <span class="identifier">a</span><span class="special">(</span><span class="identifier">a</span><span class="special">),</span> <span class="identifier">b</span><span class="special">(</span><span class="identifier">b</span><span class="special">)</span> 430 <span class="special">{}</span> 431 432 <span class="keyword">double</span> <span class="identifier">a</span><span class="special">;</span> 433 <span class="keyword">double</span> <span class="identifier">b</span><span class="special">;</span> 434<span class="special">};</span> 435</pre> 436<p> 437 </p> 438<p> 439</p> 440<pre class="programlisting"><span class="comment">// define streaming operator for the type complex</span> 441<span class="identifier">std</span><span class="special">::</span><span class="identifier">istream</span><span class="special">&</span> 442<span class="keyword">operator</span><span class="special">>></span> <span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">istream</span><span class="special">&</span> <span class="identifier">is</span><span class="special">,</span> <span class="identifier">complex</span><span class="special">&</span> <span class="identifier">z</span><span class="special">)</span> 443<span class="special">{</span> 444 <span class="keyword">char</span> <span class="identifier">lbrace</span> <span class="special">=</span> <span class="char">'\0'</span><span class="special">,</span> <span class="identifier">comma</span> <span class="special">=</span> <span class="char">'\0'</span><span class="special">,</span> <span class="identifier">rbrace</span> <span class="special">=</span> <span class="char">'\0'</span><span class="special">;</span> 445 <span class="identifier">is</span> <span class="special">>></span> <span class="identifier">lbrace</span> <span class="special">>></span> <span class="identifier">z</span><span class="special">.</span><span class="identifier">a</span> <span class="special">>></span> <span class="identifier">comma</span> <span class="special">>></span> <span class="identifier">z</span><span class="special">.</span><span class="identifier">b</span> <span class="special">>></span> <span class="identifier">rbrace</span><span class="special">;</span> 446 <span class="keyword">if</span> <span class="special">(</span><span class="identifier">lbrace</span> <span class="special">!=</span> <span class="char">'{'</span> <span class="special">||</span> <span class="identifier">comma</span> <span class="special">!=</span> <span class="char">','</span> <span class="special">||</span> <span class="identifier">rbrace</span> <span class="special">!=</span> <span class="char">'}'</span><span class="special">)</span> 447 <span class="identifier">is</span><span class="special">.</span><span class="identifier">setstate</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">ios_base</span><span class="special">::</span><span class="identifier">failbit</span><span class="special">);</span> 448 <span class="keyword">return</span> <span class="identifier">is</span><span class="special">;</span> 449<span class="special">}</span> 450</pre> 451<p> 452 </p> 453<p> 454 Using declarations and variables: 455 </p> 456<p> 457</p> 458<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">qi</span><span class="special">::</span><span class="identifier">stream</span><span class="special">;</span> 459<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">stream_parser</span><span class="special">;</span> 460</pre> 461<p> 462 </p> 463<p> 464 Parse a simple string using the operator>>(istream&, std::string&); 465 </p> 466<p> 467</p> 468<pre class="programlisting"><span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="identifier">str</span><span class="special">;</span> 469<span class="identifier">test_parser_attr</span><span class="special">(</span><span class="string">"abc"</span><span class="special">,</span> <span class="identifier">stream</span><span class="special">,</span> <span class="identifier">str</span><span class="special">);</span> 470<span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="identifier">str</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">// prints: abc</span> 471</pre> 472<p> 473 </p> 474<p> 475 Parse our complex type using the operator>>(istream&, complex&); 476 </p> 477<p> 478</p> 479<pre class="programlisting"><span class="identifier">complex</span> <span class="identifier">c</span><span class="special">;</span> 480<span class="identifier">test_parser_attr</span><span class="special">(</span><span class="string">"{1.0,2.5}"</span><span class="special">,</span> <span class="identifier">stream_parser</span><span class="special"><</span><span class="keyword">char</span><span class="special">,</span> <span class="identifier">complex</span><span class="special">>(),</span> <span class="identifier">c</span><span class="special">);</span> 481<span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="identifier">c</span><span class="special">.</span><span class="identifier">a</span> <span class="special"><<</span> <span class="string">","</span> <span class="special"><<</span> <span class="identifier">c</span><span class="special">.</span><span class="identifier">b</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">// prints: 1.0,2.5</span> 482</pre> 483<p> 484 </p> 485</div> 486<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 487<td align="left"></td> 488<td align="right"><div class="copyright-footer">Copyright © 2001-2011 Joel de Guzman, Hartmut Kaiser<p> 489 Distributed under the Boost Software License, Version 1.0. (See accompanying 490 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>) 491 </p> 492</div></td> 493</tr></table> 494<hr> 495<div class="spirit-nav"> 496<a accesskey="p" href="../stream.html"><img src="../../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../stream.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="../string.html"><img src="../../../../../../../../doc/src/images/next.png" alt="Next"></a> 497</div> 498</body> 499</html> 500
