1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>Spirit V2.4.2</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="../what_s_new.html" title="What's New"> 9<link rel="prev" href="spirit_2_5.html" title="Spirit V2.5"> 10<link rel="next" href="spirit_2_4_1.html" title="Spirit V2.4.1"> 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="spirit_2_5.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../what_s_new.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="spirit_2_4_1.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a> 24</div> 25<div class="section"> 26<div class="titlepage"><div><div><h3 class="title"> 27<a name="spirit.what_s_new.spirit_2_4_2"></a><a class="link" href="spirit_2_4_2.html" title="Spirit V2.4.2">Spirit V2.4.2</a> 28</h3></div></div></div> 29<h5> 30<a name="spirit.what_s_new.spirit_2_4_2.h0"></a> 31 <span class="phrase"><a name="spirit.what_s_new.spirit_2_4_2.what_s_changed_in__emphasis_spirit_qi__emphasis__and__emphasis_spirit_karma__emphasis__from_v2_4_1__boost_v1_45_0__to_v2_4_2__boost_v1_46_0_"></a></span><a class="link" href="spirit_2_4_2.html#spirit.what_s_new.spirit_2_4_2.what_s_changed_in__emphasis_spirit_qi__emphasis__and__emphasis_spirit_karma__emphasis__from_v2_4_1__boost_v1_45_0__to_v2_4_2__boost_v1_46_0_">What's 32 changed in <span class="emphasis"><em>Spirit.Qi</em></span> and <span class="emphasis"><em>Spirit.Karma</em></span> 33 from V2.4.1 (Boost V1.45.0) to V2.4.2 (Boost V1.46.0)</a> 34 </h5> 35<h5> 36<a name="spirit.what_s_new.spirit_2_4_2.h1"></a> 37 <span class="phrase"><a name="spirit.what_s_new.spirit_2_4_2.new_features_in_qi_or_karma"></a></span><a class="link" href="spirit_2_4_2.html#spirit.what_s_new.spirit_2_4_2.new_features_in_qi_or_karma">New 38 Features in Qi or Karma</a> 39 </h5> 40<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "> 41<li class="listitem"> 42 Added keyword indexes for <span class="emphasis"><em>Spirit.Qi</em></span> and <span class="emphasis"><em>Spirit.Karma</em></span> 43 to the docs. 44 </li> 45<li class="listitem"> 46 Introduced a new customization point <a class="link" href="../advanced/customize/assign_to/assign_to_container_from_value.html" title="Store an Attribute Value into a Container after a Parser Produced a Value (Qi)"><code class="computeroutput"><span class="identifier">traits</span><span class="special">::</span><span class="identifier">assign_to_container_from_value</span></code></a> 47 which is invoked for container attributes whenever an attribute value 48 needs to be added to that container. 49 </li> 50<li class="listitem"> 51 Replaced <code class="computeroutput"><span class="identifier">proto</span><span class="special">::</span><span class="identifier">lit</span></code> (which was used to implement <code class="computeroutput"><span class="identifier">spirit</span><span class="special">::</span><span class="identifier">lit</span></code>) with a separate version allowing 52 to distinguish 'lit(foo)' from 'foo'. This should not change any semantics 53 nor should it break exiting code. 54 </li> 55<li class="listitem"> 56 Added the <span class="emphasis"><em>Spirit.Qi</em></span> directive <a class="link" href="../qi/reference/directive/as.html" title="Parser Directives Forcing Atomic Assignment (as<T>, as_string[], as_wstring[])"><code class="computeroutput"><span class="identifier">as</span><span class="special"><</span><span class="identifier">T</span><span class="special">>[]</span></code></a> 57 (and its string specializations <a class="link" href="../qi/reference/directive/as.html" title="Parser Directives Forcing Atomic Assignment (as<T>, as_string[], as_wstring[])"><code class="computeroutput"><span class="identifier">as_string</span><span class="special">[]</span></code></a> 58 and <a class="link" href="../qi/reference/directive/as.html" title="Parser Directives Forcing Atomic Assignment (as<T>, as_string[], as_wstring[])"><code class="computeroutput"><span class="identifier">as_wstring</span><span class="special">[]</span></code></a>) enabling assignment of container 59 attribute types as a whole. 60 </li> 61<li class="listitem"> 62 Added the <span class="emphasis"><em>Spirit.Karma</em></span> directive <a class="link" href="../karma/reference/directive/as.html" title="Generator Directives Forcing Atomic Extraction (as<T>, as_string[], as_wstring[])"><code class="computeroutput"><span class="identifier">as</span><span class="special"><</span><span class="identifier">T</span><span class="special">>[]</span></code></a> 63 (and its string specializations <a class="link" href="../karma/reference/directive/as.html" title="Generator Directives Forcing Atomic Extraction (as<T>, as_string[], as_wstring[])"><code class="computeroutput"><span class="identifier">as_string</span><span class="special">[]</span></code></a> 64 and <a class="link" href="../karma/reference/directive/as.html" title="Generator Directives Forcing Atomic Extraction (as<T>, as_string[], as_wstring[])"><code class="computeroutput"><span class="identifier">as_wstring</span><span class="special">[]</span></code></a>) 65 enabling handling of container attribute types during output generation 66 as a whole. 67 </li> 68<li class="listitem"> 69 In <span class="emphasis"><em>Spirit.Qi</em></span>, <code class="computeroutput"><span class="identifier">lit</span><span class="special">()</span></code> can now be used for numeric literals 70 as well. 71 </li> 72<li class="listitem"> 73 The <a class="link" href="../qi/reference/string/symbols.html" title="Symbols Parser (symbols)"><code class="computeroutput"><span class="identifier">symbols</span><span class="special"><></span></code></a> 74 parser component now has an explicit name used for error handling and 75 debugging, which can be set using the new member functions <code class="computeroutput"><span class="identifier">sym</span><span class="special">.</span><span class="identifier">name</span><span class="special">(...)</span></code>. 76 Thanks to teajay for contributing a patch. 77 </li> 78<li class="listitem"> 79 The <a class="link" href="../karma/reference/string/symbols.html" title="Symbols Generator (symbols)"><code class="computeroutput"><span class="identifier">symbols</span><span class="special"><</span><span class="identifier">Attrib</span><span class="special">,</span> <span class="identifier">T</span><span class="special">></span></code></a> 80 generator component now has an explicit name used for error handling 81 and debugging, which can be set using the new member functions <code class="computeroutput"><span class="identifier">sym</span><span class="special">.</span><span class="identifier">name</span><span class="special">(...)</span></code>. 82 </li> 83</ul></div> 84<h5> 85<a name="spirit.what_s_new.spirit_2_4_2.h2"></a> 86 <span class="phrase"><a name="spirit.what_s_new.spirit_2_4_2.bug_fixes_in_qi_or_karma"></a></span><a class="link" href="spirit_2_4_2.html#spirit.what_s_new.spirit_2_4_2.bug_fixes_in_qi_or_karma">Bug Fixes 87 in Qi or Karma</a> 88 </h5> 89<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "> 90<li class="listitem"> 91 Fixed a problem in handling container attributes for <span class="emphasis"><em>Spirit.Qi</em></span> 92 sequences, which caused the properly parsed attributes of the first elements 93 being overwritten by later elements of the sequence. 94 </li> 95<li class="listitem"> 96 Fixed the <span class="emphasis"><em>Spirit.Karma</em></span> generator <a class="link" href="../karma/reference/string.html" title="String Generators"><code class="computeroutput"><span class="identifier">string</span><span class="special">(</span><span class="identifier">s</span><span class="special">)</span></code></a>. 97 It succeeded even if <code class="computeroutput"><span class="identifier">s</span></code> 98 matched only a prefix of its attribute. 99 </li> 100</ul></div> 101<h5> 102<a name="spirit.what_s_new.spirit_2_4_2.h3"></a> 103 <span class="phrase"><a name="spirit.what_s_new.spirit_2_4_2.what_s_changed_in__emphasis_spirit_lex__emphasis__from_v2_4_1__boost_v1_45_0__to_v2_4_2__boost_v1_46_0_"></a></span><a class="link" href="spirit_2_4_2.html#spirit.what_s_new.spirit_2_4_2.what_s_changed_in__emphasis_spirit_lex__emphasis__from_v2_4_1__boost_v1_45_0__to_v2_4_2__boost_v1_46_0_">What's 104 changed in <span class="emphasis"><em>Spirit.Lex</em></span> from V2.4.1 (Boost V1.45.0) to 105 V2.4.2 (Boost V1.46.0)</a> 106 </h5> 107<h5> 108<a name="spirit.what_s_new.spirit_2_4_2.h4"></a> 109 <span class="phrase"><a name="spirit.what_s_new.spirit_2_4_2.new_features_in_lex"></a></span><a class="link" href="spirit_2_4_2.html#spirit.what_s_new.spirit_2_4_2.new_features_in_lex">New 110 Features in Lex</a> 111 </h5> 112<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "> 113<li class="listitem"> 114 Added <code class="computeroutput"><span class="identifier">qi</span><span class="special">::</span><span class="identifier">tokenid</span><span class="special">()</span></code> 115 primitive parser allowing to match arbitrary lexer tokens based on a 116 given token id. The difference to <code class="computeroutput"><span class="identifier">qi</span><span class="special">::</span><span class="identifier">token</span><span class="special">()</span></code> is, that it exposes as its attribute 117 the token id of the matched token (instead of the iterator_range of the 118 matched input, as <code class="computeroutput"><span class="identifier">qi</span><span class="special">::</span><span class="identifier">token</span><span class="special">()</span></code> does). 119 </li> 120<li class="listitem"> 121 Added an additional template parameter to the default <code class="computeroutput"><span class="identifier">lexertl</span><span class="special">::</span><span class="identifier">token</span><span class="special"><></span></code> definition: the type of the token 122 id. This type defaults to <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span></code>. 123 Any type used as the id type needs to be (explicitly) convertible from 124 <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span></code>. 125 </li> 126<li class="listitem"> 127 It's now possible to attach lexer semantic actions to token definitions 128 based on <code class="computeroutput"><span class="identifier">lex</span><span class="special">::</span><span class="keyword">char</span><span class="special">()</span></code> 129 and <code class="computeroutput"><span class="identifier">lex</span><span class="special">::</span><span class="identifier">string</span><span class="special">()</span></code>. 130 </li> 131<li class="listitem"> 132 It's now possible to specify a lexer state the lexer should automatically 133 be switched to after matching certain tokens. For this reason the token 134 definition syntax has been extended: 135<pre class="programlisting"><span class="keyword">template</span> <span class="special"><</span><span class="keyword">typename</span> <span class="identifier">Lexer</span><span class="special">></span> 136<span class="keyword">struct</span> <span class="identifier">lexer</span> <span class="special">:</span> <span class="identifier">lex</span><span class="special">::</span><span class="identifier">lexer</span><span class="special"><</span><span class="identifier">Lexer</span><span class="special">></span> 137<span class="special">{</span> 138 <span class="identifier">lexer</span><span class="special">()</span> 139 <span class="special">{</span> 140 <span class="identifier">int_</span> <span class="special">=</span> <span class="string">"[1-9][0-9]*"</span><span class="special">;</span> 141 <span class="keyword">this</span><span class="special">-></span><span class="identifier">self</span><span class="special">(</span><span class="string">"INITIAL"</span><span class="special">,</span> <span class="string">"TARGETSTATE"</span><span class="special">)</span> <span class="special">=</span> <span class="identifier">int_</span><span class="special">;</span> 142 <span class="special">}</span> 143 <span class="identifier">lex</span><span class="special">::</span><span class="identifier">token_def</span><span class="special"><</span><span class="keyword">int</span><span class="special">></span> <span class="identifier">int_</span><span class="special">;</span> 144<span class="special">};</span> 145</pre> 146 This example lexer will match a <code class="computeroutput"><span class="identifier">int_</span></code> 147 token and will switch the lexer to the state <code class="computeroutput"><span class="string">"TARGETSTATE"</span></code> 148 afterwards. If the second argument is not specified the lexer remains 149 in the previous state (as before). 150 </li> 151<li class="listitem"> 152 The parser primitives <code class="computeroutput"><span class="identifier">qi</span><span class="special">::</span><span class="identifier">token</span></code> 153 and <code class="computeroutput"><span class="identifier">qi</span><span class="special">::</span><span class="identifier">tokenid</span></code> can now be used without any 154 argument. In this case they will match any token. 155 </li> 156<li class="listitem"> 157 <code class="computeroutput"><span class="identifier">lex</span><span class="special">::</span><span class="identifier">lit</span><span class="special">()</span></code> 158 has been removed. 159 </li> 160</ul></div> 161<h5> 162<a name="spirit.what_s_new.spirit_2_4_2.h5"></a> 163 <span class="phrase"><a name="spirit.what_s_new.spirit_2_4_2.bug_fixes_in_lex"></a></span><a class="link" href="spirit_2_4_2.html#spirit.what_s_new.spirit_2_4_2.bug_fixes_in_lex">Bug 164 Fixes in Lex</a> 165 </h5> 166<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "> 167<li class="listitem"> 168 Fixed an issue in the Lexer giving problems while assigning tokens to 169 all lexer states at once. This is now possible by simply using "*" 170 as the state name. For instance this will add the token int_ to all lexer 171 states: 172<pre class="programlisting"><span class="keyword">template</span> <span class="special"><</span><span class="keyword">typename</span> <span class="identifier">Lexer</span><span class="special">></span> 173<span class="keyword">struct</span> <span class="identifier">lexer</span> <span class="special">:</span> <span class="identifier">lex</span><span class="special">::</span><span class="identifier">lexer</span><span class="special"><</span><span class="identifier">Lexer</span><span class="special">></span> 174<span class="special">{</span> 175 <span class="identifier">lexer</span><span class="special">()</span> 176 <span class="special">{</span> 177 <span class="identifier">int_</span> <span class="special">=</span> <span class="string">"[1-9][0-9]*"</span><span class="special">;</span> 178 <span class="keyword">this</span><span class="special">-></span><span class="identifier">self</span><span class="special">(</span><span class="string">"*"</span><span class="special">)</span> <span class="special">=</span> <span class="identifier">int_</span><span class="special">;</span> 179 <span class="special">}</span> 180 <span class="identifier">lex</span><span class="special">::</span><span class="identifier">token_def</span><span class="special"><</span><span class="keyword">int</span><span class="special">></span> <span class="identifier">int_</span><span class="special">;</span> 181<span class="special">};</span> 182</pre> 183 Note: the <code class="computeroutput"><span class="identifier">self</span><span class="special">(</span><span class="string">"*"</span><span class="special">)</span> 184 <span class="special">=</span> <span class="special">...</span></code> 185 must be executed after all lexer states have been introduced to the lexer 186 object. 187 </li> 188<li class="listitem"> 189 Fixed lexer lookahead. The lookahead operation is now evaluated using 190 the lexer state the <code class="computeroutput"><span class="identifier">token_def</span></code> 191 instance used as its argument is associated with. 192 </li> 193<li class="listitem"> 194 Fixed a problem in the <code class="computeroutput"><span class="identifier">multi_pass</span></code> 195 iterator causing wrong tokens to be returned to the user. This could 196 happen in conjunction with a lexer which performed lexer state changes 197 and was using <code class="computeroutput"><span class="identifier">pass_fail</span></code> 198 in semantic actions to make a token match fail. 199 </li> 200</ul></div> 201<h5> 202<a name="spirit.what_s_new.spirit_2_4_2.h6"></a> 203 <span class="phrase"><a name="spirit.what_s_new.spirit_2_4_2.known_problems"></a></span><a class="link" href="spirit_2_4_2.html#spirit.what_s_new.spirit_2_4_2.known_problems">Known 204 Problems</a> 205 </h5> 206<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"> 207 <span class="emphasis"><em>Spirit.Qi</em></span> integer literals (like <code class="computeroutput"><span class="identifier">int_</span><span class="special">(</span><span class="number">10</span><span class="special">)</span></code>) 208 consume input on failure, which can lead to problems with the alternative 209 operator. 210 </li></ul></div> 211</div> 212<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 213<td align="left"></td> 214<td align="right"><div class="copyright-footer">Copyright © 2001-2011 Joel de Guzman, Hartmut Kaiser<p> 215 Distributed under the Boost Software License, Version 1.0. (See accompanying 216 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>) 217 </p> 218</div></td> 219</tr></table> 220<hr> 221<div class="spirit-nav"> 222<a accesskey="p" href="spirit_2_5.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../what_s_new.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="spirit_2_4_1.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a> 223</div> 224</body> 225</html> 226
