| <html> |
| <head> |
| <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> |
| <title>Spirit V2.4.2</title> |
| <link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css"> |
| <meta name="generator" content="DocBook XSL Stylesheets V1.78.1"> |
| <link rel="home" href="../../index.html" title="Spirit 2.5.2"> |
| <link rel="up" href="../what_s_new.html" title="What's New"> |
| <link rel="prev" href="spirit_2_5.html" title="Spirit V2.5"> |
| <link rel="next" href="spirit_2_4_1.html" title="Spirit V2.4.1"> |
| </head> |
| <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> |
| <table cellpadding="2" width="100%"><tr> |
| <td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../boost.png"></td> |
| <td align="center"><a href="../../../../../../index.html">Home</a></td> |
| <td align="center"><a href="../../../../../../libs/libraries.htm">Libraries</a></td> |
| <td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> |
| <td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> |
| <td align="center"><a href="../../../../../../more/index.htm">More</a></td> |
| </tr></table> |
| <hr> |
| <div class="spirit-nav"> |
| <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> |
| </div> |
| <div class="section"> |
| <div class="titlepage"><div><div><h3 class="title"> |
| <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> |
| </h3></div></div></div> |
| <h5> |
| <a name="spirit.what_s_new.spirit_2_4_2.h0"></a> |
| <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 |
| changed in <span class="emphasis"><em>Spirit.Qi</em></span> and <span class="emphasis"><em>Spirit.Karma</em></span> |
| from V2.4.1 (Boost V1.45.0) to V2.4.2 (Boost V1.46.0)</a> |
| </h5> |
| <h5> |
| <a name="spirit.what_s_new.spirit_2_4_2.h1"></a> |
| <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 |
| Features in Qi or Karma</a> |
| </h5> |
| <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "> |
| <li class="listitem"> |
| Added keyword indexes for <span class="emphasis"><em>Spirit.Qi</em></span> and <span class="emphasis"><em>Spirit.Karma</em></span> |
| to the docs. |
| </li> |
| <li class="listitem"> |
| 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> |
| which is invoked for container attributes whenever an attribute value |
| needs to be added to that container. |
| </li> |
| <li class="listitem"> |
| 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 |
| to distinguish 'lit(foo)' from 'foo'. This should not change any semantics |
| nor should it break exiting code. |
| </li> |
| <li class="listitem"> |
| 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> |
| (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> |
| 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 asignment of container |
| attribute types as a whole. |
| </li> |
| <li class="listitem"> |
| 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> |
| (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> |
| 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>) |
| enabling handling of container attribute types during output generation |
| as a whole. |
| </li> |
| <li class="listitem"> |
| 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 |
| as well. |
| </li> |
| <li class="listitem"> |
| 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> |
| parser component now has an explicit name used for error handling 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>. |
| Thanks to teajay for contributing a patch. |
| </li> |
| <li class="listitem"> |
| 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> |
| generator component now has an explicit name used for error handling |
| 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>. |
| </li> |
| </ul></div> |
| <h5> |
| <a name="spirit.what_s_new.spirit_2_4_2.h2"></a> |
| <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 |
| in Qi or Karma</a> |
| </h5> |
| <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "> |
| <li class="listitem"> |
| Fixed a problem in handling container attributes for <span class="emphasis"><em>Spirit.Qi</em></span> |
| sequences, which caused the properly parsed attributes of the first elements |
| being overwritten by later elements of the sequence. |
| </li> |
| <li class="listitem"> |
| 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>. |
| It succeeded even if <code class="computeroutput"><span class="identifier">s</span></code> |
| matched only a prefix of its attribute. |
| </li> |
| </ul></div> |
| <h5> |
| <a name="spirit.what_s_new.spirit_2_4_2.h3"></a> |
| <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 |
| changed in <span class="emphasis"><em>Spirit.Lex</em></span> from V2.4.1 (Boost V1.45.0) to |
| V2.4.2 (Boost V1.46.0)</a> |
| </h5> |
| <h5> |
| <a name="spirit.what_s_new.spirit_2_4_2.h4"></a> |
| <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 |
| Features in Lex</a> |
| </h5> |
| <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "> |
| <li class="listitem"> |
| Added <code class="computeroutput"><span class="identifier">qi</span><span class="special">::</span><span class="identifier">tokenid</span><span class="special">()</span></code> |
| primitive parser allowing to match arbitrary lexer tokens based on a |
| 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 |
| the token id of the matched token (instead of the iterator_range of the |
| 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). |
| </li> |
| <li class="listitem"> |
| 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 |
| id. This type defaults to <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span></code>. |
| Any type used as the id type needs to be (explicitly) convertible from |
| <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span></code>. |
| </li> |
| <li class="listitem"> |
| It's now possible to attach lexer semantic actions to token definitions |
| based on <code class="computeroutput"><span class="identifier">lex</span><span class="special">::</span><span class="keyword">char</span><span class="special">()</span></code> |
| and <code class="computeroutput"><span class="identifier">lex</span><span class="special">::</span><span class="identifier">string</span><span class="special">()</span></code>. |
| </li> |
| <li class="listitem"> |
| It's now possible to specify a lexer state the lexer should automatically |
| be switched to after matching certain tokens. For this reason the token |
| definition syntax has been extended: |
| <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> |
| <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> |
| <span class="special">{</span> |
| <span class="identifier">lexer</span><span class="special">()</span> |
| <span class="special">{</span> |
| <span class="identifier">int_</span> <span class="special">=</span> <span class="string">"[1-9][0-9]*"</span><span class="special">;</span> |
| <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> |
| <span class="special">}</span> |
| <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> |
| <span class="special">};</span> |
| </pre> |
| This example lexer will match a <code class="computeroutput"><span class="identifier">int_</span></code> |
| token and will switch the lexer to the state <code class="computeroutput"><span class="string">"TARGETSTATE"</span></code> |
| afterwards. If the second argument is not specified the lexer remains |
| in the previous state (as before). |
| </li> |
| <li class="listitem"> |
| The parser primitives <code class="computeroutput"><span class="identifier">qi</span><span class="special">::</span><span class="identifier">token</span></code> |
| 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 |
| argument. In this case they will match any token. |
| </li> |
| <li class="listitem"> |
| <code class="computeroutput"><span class="identifier">lex</span><span class="special">::</span><span class="identifier">lit</span><span class="special">()</span></code> |
| has been removed. |
| </li> |
| </ul></div> |
| <h5> |
| <a name="spirit.what_s_new.spirit_2_4_2.h5"></a> |
| <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 |
| Fixes in Lex</a> |
| </h5> |
| <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "> |
| <li class="listitem"> |
| Fixed an issue in the Lexer giving problems while assigning tokens to |
| all lexer states at once. This is now possible by simply using "*" |
| as the state name. For instance this will add the token int_ to all lexer |
| states: |
| <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> |
| <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> |
| <span class="special">{</span> |
| <span class="identifier">lexer</span><span class="special">()</span> |
| <span class="special">{</span> |
| <span class="identifier">int_</span> <span class="special">=</span> <span class="string">"[1-9][0-9]*"</span><span class="special">;</span> |
| <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> |
| <span class="special">}</span> |
| <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> |
| <span class="special">};</span> |
| </pre> |
| Note: the <code class="computeroutput"><span class="identifier">self</span><span class="special">(</span><span class="string">"*"</span><span class="special">)</span> |
| <span class="special">=</span> <span class="special">...</span></code> |
| must be executed after all lexer states have been introduced to the lexer |
| object. |
| </li> |
| <li class="listitem"> |
| Fixed lexer lookahead. The lookahead operation is now evaluated using |
| the lexer state the <code class="computeroutput"><span class="identifier">token_def</span></code> |
| instance used as its argument is associated with. |
| </li> |
| <li class="listitem"> |
| Fixed a problem in the <code class="computeroutput"><span class="identifier">multi_pass</span></code> |
| iterator causing wrong tokens to be returned to the user. This could |
| happen in conjunction with a lexer which performed lexer state changes |
| and was using <code class="computeroutput"><span class="identifier">pass_fail</span></code> |
| in semantic actions to make a token match fail. |
| </li> |
| </ul></div> |
| <h5> |
| <a name="spirit.what_s_new.spirit_2_4_2.h6"></a> |
| <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 |
| Problems</a> |
| </h5> |
| <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"> |
| <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>) |
| consume input on failure, which can lead to problems with the alternative |
| operator. |
| </li></ul></div> |
| </div> |
| <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> |
| <td align="left"></td> |
| <td align="right"><div class="copyright-footer">Copyright © 2001-2011 Joel de Guzman, Hartmut Kaiser<p> |
| 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" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) |
| </p> |
| </div></td> |
| </tr></table> |
| <hr> |
| <div class="spirit-nav"> |
| <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> |
| </div> |
| </body> |
| </html> |
