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<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="spirit.what_s_new.spirit_2_1"></a><a class="link" href="spirit_2_1.html" title="Spirit V2.1">Spirit V2.1</a>
</h3></div></div></div>
<h5>
<a name="spirit.what_s_new.spirit_2_1.h0"></a>
<span><a name="spirit.what_s_new.spirit_2_1.what_s_changed_in__emphasis_spirit_qi__emphasis__and__emphasis_spirit_karma__emphasis__from_v2_0__boost_v1_37_0__to_v2_1__boost_v1_41_0_"></a></span><a class="link" href="spirit_2_1.html#spirit.what_s_new.spirit_2_1.what_s_changed_in__emphasis_spirit_qi__emphasis__and__emphasis_spirit_karma__emphasis__from_v2_0__boost_v1_37_0__to_v2_1__boost_v1_41_0_">What's
changed in <span class="emphasis"><em>Spirit.Qi</em></span> and <span class="emphasis"><em>Spirit.Karma</em></span>
from V2.0 (Boost V1.37.0) to V2.1 (Boost V1.41.0)</a>
</h5>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
<a href="http://boost-spirit.com" target="_top">Spirit</a> is now based on the
newest version of <a href="../../../../../../doc/html/proto.html" target="_top">Boost.Proto</a>
</li>
<li class="listitem">
<code class="computeroutput"><span class="identifier">qi</span><span class="special">::</span><span class="identifier">phrase_parse</span></code>, <code class="computeroutput"><span class="identifier">qi</span><span class="special">::</span><span class="identifier">phrase_format</span></code>
now post-skip by default.
</li>
<li class="listitem">
<code class="computeroutput"><span class="identifier">karma</span><span class="special">::</span><span class="identifier">generate_delimited</span></code> and <code class="computeroutput"><span class="identifier">karma</span><span class="special">::</span><span class="identifier">format_delimited</span></code> now don't do pre-
delimiting by default.
</li>
<li class="listitem">
Changed parameter sequence of <code class="computeroutput"><span class="identifier">qi</span><span class="special">::</span><span class="identifier">phrase_parse</span></code>,
<code class="computeroutput"><span class="identifier">qi</span><span class="special">::</span><span class="identifier">phrase_match</span></code>, <code class="computeroutput"><span class="identifier">karma</span><span class="special">::</span><span class="identifier">generate_delimited</span></code>,
and <code class="computeroutput"><span class="identifier">match_delimited</span></code>.
The attribute is now always the last parameter.
</li>
<li class="listitem">
Added new overloads of those functions allowing to explicitly specify
the post-skipping and pre-delimiting behavior.
</li>
<li class="listitem">
Added multi attribute API functions
</li>
<li class="listitem">
Removed <code class="computeroutput"><span class="identifier">grammar_def</span><span class="special"><></span></code>
</li>
<li class="listitem">
Removed functions <code class="computeroutput"><span class="identifier">make_parser</span><span class="special">()</span></code> and <code class="computeroutput"><span class="identifier">make_generator</span><span class="special">()</span></code>
</li>
<li class="listitem">
Removed <code class="computeroutput"><span class="identifier">qi</span><span class="special">::</span><span class="identifier">none</span></code> and <code class="computeroutput"><span class="identifier">karma</span><span class="special">::</span><span class="identifier">none</span></code>
</li>
<li class="listitem">
Sequences and lists now accept a standard container as their attribute
</li>
<li class="listitem">
The string placeholder terminal now can take other strings as its parameter
(i.e. std::string)
</li>
<li class="listitem">
All terminals taking literals now accept a (lazy) function object as
well
</li>
<li class="listitem">
All placeholders for terminals and directives (such as <code class="computeroutput"><span class="identifier">int_</span></code>, <code class="computeroutput"><span class="identifier">double_</span></code>,
<code class="computeroutput"><span class="identifier">verbatim</span></code>, etc.) were
previously defined in the namespace <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">spirit</span></code>
only. Now these are additionally imported into the namespaces <code class="computeroutput"><span class="identifier">spirit</span><span class="special">::</span><span class="identifier">qi</span></code>, <code class="computeroutput"><span class="identifier">spirit</span><span class="special">::</span><span class="identifier">karma</span></code>,
and <code class="computeroutput"><span class="identifier">spirit</span><span class="special">::</span><span class="identifier">lex</span></code> (if they are supported by the corresponding
sub-library).
</li>
<li class="listitem">
The terminal placeholders <code class="computeroutput"><span class="identifier">char_</span></code>
and <code class="computeroutput"><span class="identifier">string</span></code> are not defined
in the namespace <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">spirit</span></code>
anymore as they have been moved to the character set namespaces, allowing
to do proper character set handling based on the used namespace (as
<code class="computeroutput"><span class="identifier">spirit</span><span class="special">::</span><span class="identifier">ascii</span></code>, etc.)
</li>
<li class="listitem">
The <code class="computeroutput"><span class="identifier">uint</span></code>, <code class="computeroutput"><span class="identifier">ushort</span></code>, <code class="computeroutput"><span class="identifier">ulong</span></code>,
and <code class="computeroutput"><span class="identifier">byte</span></code> terminal placeholders
have been renamed to <code class="computeroutput"><span class="identifier">uint_</span></code>,
<code class="computeroutput"><span class="identifier">ushort_</span></code>, <code class="computeroutput"><span class="identifier">ulong_</span></code>, and <code class="computeroutput"><span class="identifier">byte_</span></code>.
</li>
<li class="listitem">
<code class="computeroutput"><span class="identifier">qi</span><span class="special">::</span><span class="identifier">skip</span><span class="special">[]</span></code>
now re-enables outer skipper if used inside <code class="computeroutput"><span class="identifier">lexeme</span><span class="special">[]</span></code>
</li>
<li class="listitem">
Added <code class="computeroutput"><span class="identifier">karma</span><span class="special">::</span><span class="identifier">maxwidth</span><span class="special">[]</span></code>
directive (see <a class="link" href="../karma/reference/directive/maxwidth.html" title="Generator Directives Controlling the Maximum Field Width (maxwidth[])"><code class="computeroutput"><span class="identifier">maxwidth</span></code></a>)
</li>
<li class="listitem">
Added <code class="computeroutput"><span class="identifier">karma</span><span class="special">::</span><span class="identifier">omit</span><span class="special">[]</span></code>
allowing to consume the attribute of subject generator without emitting
any output (see <a class="link" href="../karma/reference/directive/omit.html" title="Generator Directives Consuming Attributes (omit[] and skip[])"><code class="computeroutput"><span class="identifier">omit</span></code></a>).
</li>
<li class="listitem">
Added <code class="computeroutput"><span class="identifier">karma</span><span class="special">::</span><span class="identifier">buffer</span><span class="special">[]</span></code>
allowing to avoid unwanted output to be generated in case of a generator
failing in the middle of a sequence (see <a class="link" href="../karma/reference/directive/buffer.html" title="Generator Directive for Temporary Output Buffering (buffer[])"><code class="computeroutput"><span class="identifier">buffer</span></code></a>).
</li>
<li class="listitem">
<code class="computeroutput"><span class="identifier">karma</span><span class="special">::</span><span class="identifier">delimit</span><span class="special">[]</span></code>
now re-enables outer delimiter if used inside <code class="computeroutput"><span class="identifier">verbatim</span><span class="special">[]</span></code>
</li>
<li class="listitem">
Karma: added and-predicate (<code class="computeroutput"><span class="keyword">operator</span><span class="special">&()</span></code>) and not-predicate (<code class="computeroutput"><span class="keyword">operator</span><span class="special">!()</span></code>)
Both now always consume an attribute.
</li>
<li class="listitem">
Karma: changed semantics of <code class="computeroutput"><span class="identifier">char_</span><span class="special">()</span></code>, <code class="computeroutput"><span class="identifier">string</span><span class="special">()</span></code>, <code class="computeroutput"><span class="identifier">int_</span><span class="special">()</span></code> et.al., and <code class="computeroutput"><span class="identifier">double_</span><span class="special">()</span></code> et.al.: all of these generators now
always expose an attribute. If they do not have an associated attribute,
they generate their immediate literal. If they have an associated attribute,
the generators first test if the attribute value is equal to the immediate
literal. They fail and do not generate anything if those are not equal.
Otherwise they generate their immediate literal. For more information
see for instance <a class="link" href="../karma/reference/numeric/signed_int.html" title="Signed Integer Number Generators (int_, etc.)"><code class="computeroutput"><span class="identifier">int_</span></code></a>.
</li>
<li class="listitem">
<code class="computeroutput"><span class="identifier">karma</span><span class="special">::</span><span class="identifier">lit</span><span class="special">()</span></code>
can now be used to generate integer and floating point numbers
</li>
<li class="listitem">
<code class="computeroutput"><span class="identifier">qi</span><span class="special">::</span><span class="identifier">rule</span></code> and <code class="computeroutput"><span class="identifier">karma</span><span class="special">::</span><span class="identifier">rule</span></code>
now can be directly initialized using their copy constructor. I.e. this
works now: <code class="computeroutput"><span class="identifier">qi</span><span class="special">::</span><span class="identifier">rule</span><span class="special"><...></span>
<span class="identifier">r</span> <span class="special">=</span>
<span class="special">...</span><span class="identifier">some</span>
<span class="identifier">parser</span><span class="special">...;</span></code>.
</li>
<li class="listitem">
Added <code class="computeroutput"><span class="identifier">qi</span><span class="special">::</span><span class="identifier">attr</span><span class="special">()</span></code>
exposing its immediate parameter as its attribute.
</li>
<li class="listitem">
Added boolean parsers and generators (<code class="computeroutput"><span class="identifier">bool_</span></code>,
<code class="computeroutput"><span class="identifier">true_</span></code>, <code class="computeroutput"><span class="identifier">false_</span></code>).
</li>
<li class="listitem">
Added <code class="computeroutput"><span class="identifier">attr_cast</span><span class="special"><></span></code>
enabling in place attribute type conversion in Qi and Karma grammars.
</li>
<li class="listitem">
Almost all Karma generators now accept <code class="computeroutput"><span class="identifier">optional</span><span class="special"><></span></code> attributes and will fail generating
if this is not initialized.
</li>
<li class="listitem">
Qi and Karma rules now automatically detect whether to apply auto-rule
semantics or not (no need for using <code class="computeroutput"><span class="keyword">operator</span><span class="special">%=()</span></code> anymore, even if it's still existing).
Auto-rule semantics are applied if the right hand side has no semantic
actions attached to any of the elements. This works for rule initialization
and assignment.
</li>
<li class="listitem">
Qi and Karma rules now do intrinsic attribute transformation based on
the attribute customization point <a class="link" href="../advanced/customize/transform.html" title="Transform an Attribute to a Different Type (Qi and Karma)"><code class="computeroutput"><span class="identifier">traits</span><span class="special">::</span><span class="identifier">transform_attribute</span></code></a>.
</li>
<li class="listitem">
All char_ parsers now always expose an attribute. Earlier <code class="computeroutput"><span class="identifier">char_</span><span class="special">(...)</span></code>
didn't expose an attribute while <code class="computeroutput"><span class="identifier">char_</span></code>
did. If you need a literal parser not exposing any attribute use <code class="computeroutput"><span class="identifier">lit</span><span class="special">(...)</span></code>
instead.
</li>
<li class="listitem">
The qi::int_spec, qi::real_spec, karma::int_spec, and karma real_spec
types do not exist anymore. These have been replaced with qi::int_parser,
qi::real_parser, karma::int_generator, and karma::real_generator.
</li>
</ul></div>
<h5>
<a name="spirit.what_s_new.spirit_2_1.h1"></a>
<span><a name="spirit.what_s_new.spirit_2_1.what_s_changed_in__emphasis_spirit_lex__emphasis__from_v2_0__boost_v1_37_0__to_v2_1__boost_v1_41_0_"></a></span><a class="link" href="spirit_2_1.html#spirit.what_s_new.spirit_2_1.what_s_changed_in__emphasis_spirit_lex__emphasis__from_v2_0__boost_v1_37_0__to_v2_1__boost_v1_41_0_">What's
changed in <span class="emphasis"><em>Spirit.Lex</em></span> from V2.0 (Boost V1.37.0) to V2.1
(Boost V1.41.0)</a>
</h5>
<p>
Here is a list of changes in <span class="emphasis"><em>Spirit.Lex</em></span> since version
2.0. <span class="emphasis"><em>Spirit.Lex</em></span> 2.1 is a complete rewrite of the <span class="emphasis"><em>Spirit.Lex</em></span>
distributed with Boost V1.37. As with all code portions of the <a href="http://boost-spirit.com" target="_top">Spirit</a>
library, <span class="emphasis"><em>Spirit.Lex</em></span> is usable as stand alone piece.
<span class="emphasis"><em>Spirit.Lex</em></span> now uses the infrastructure provided by
<a href="http://boost-spirit.com" target="_top">Spirit</a> version 2.1.
</p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
The lex::lexer_def class has been renamed to lex::lexer, while the original
class lex::lexer does not exist anymore. This simplifies the creation
of lexers.
</li>
<li class="listitem">
The lex::lexer class does not have the function <code class="computeroutput"><span class="identifier">def</span><span class="special">(</span><span class="identifier">Self</span><span class="special">&</span> <span class="identifier">self</span><span class="special">)</span></code> anymore, token definitions can be added
to the lexer at any time, usually in the constructor of the user defined
lexer class:
<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">example_tokens</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">example_tokens</span><span class="special">()</span>
<span class="special">{</span>
<span class="comment">// your token definitions here</span>
<span class="keyword">this</span><span class="special">-></span><span class="identifier">self</span> <span class="special">=</span> <span class="special">...</span>
<span class="special">}</span>
<span class="special">};</span>
</pre>
</li>
<li class="listitem">
The new lexer class can now be used directly. The function <code class="computeroutput"><span class="identifier">make_lexer</span><span class="special">()</span></code>
has been removed.
</li>
<li class="listitem">
The <code class="computeroutput"><span class="identifier">lex</span><span class="special">::</span><span class="identifier">tokenize_and_parse</span><span class="special">()</span></code>
and <code class="computeroutput"><span class="identifier">lex</span><span class="special">::</span><span class="identifier">tokenize_and_phrase_parse</span><span class="special">()</span></code>
functions have been changed to match the parameter sequence as implemented
by the <code class="computeroutput"><span class="identifier">qi</span><span class="special">::</span><span class="identifier">parse</span><span class="special">()</span></code>
and <code class="computeroutput"><span class="identifier">qi</span><span class="special">::</span><span class="identifier">phrase_parse</span><span class="special">()</span></code>
functions. Both take an arbitrary number of attribute arguments as the
last parameters. This argument list is limited by the macro <code class="computeroutput"><span class="identifier">SPIRIT_ARGUMENTS_LIMIT</span></code>.
</li>
<li class="listitem">
The <code class="computeroutput"><span class="identifier">lex</span><span class="special">::</span><span class="identifier">lexertl_lexer</span></code>, and <code class="computeroutput"><span class="identifier">lex</span><span class="special">::</span><span class="identifier">lexertl_token</span></code>
classes have been moved to the <code class="computeroutput"><span class="identifier">lex</span><span class="special">::</span><span class="identifier">lexertl</span></code>
namespace and the names have been changed to <code class="computeroutput"><span class="identifier">lex</span><span class="special">::</span><span class="identifier">lexertl</span><span class="special">::</span><span class="identifier">lexer</span></code>,
<code class="computeroutput"><span class="identifier">lex</span><span class="special">::</span><span class="identifier">lexertl</span><span class="special">::</span><span class="identifier">token</span></code>. This also applies to the <code class="computeroutput"><span class="identifier">lex</span><span class="special">::</span><span class="identifier">lexert_actor_lexer</span></code>, and the <code class="computeroutput"><span class="identifier">static_lexertl_</span><span class="special">*</span></code>
family of types.
</li>
<li class="listitem">
The class <code class="computeroutput"><span class="identifier">lex</span><span class="special">::</span><span class="identifier">lexertl_token_set</span></code> has been removed.
This functionality is now available from the lexer class.
</li>
<li class="listitem">
The <span class="emphasis"><em>Spirit.Lex</em></span> library has been updated to use the
newest version of Ben Hansons <a href="http://www.benhanson.net/lexertl.html" target="_top">Lexertl</a>
lexer construction library (Boost review pending).
</li>
<li class="listitem">
The <code class="computeroutput"><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></code>
template constructor now takes an optional parameter specifying the
<code class="computeroutput"><span class="identifier">match_flags</span></code> to be used
for table generation. Currently, there are the following flags available:
<pre class="programlisting"><span class="identifier">match_flags</span><span class="special">::</span><span class="identifier">match_default</span><span class="special">,</span> <span class="comment">// no flags</span>
<span class="identifier">match_flags</span><span class="special">::</span><span class="identifier">match_not_dot_newline</span><span class="special">,</span> <span class="comment">// the regex '.' doesn't match newlines</span>
<span class="identifier">match_flags</span><span class="special">::</span><span class="identifier">match_icase</span> <span class="comment">// all matching operations are case insensitive</span>
</pre>
If no parameter is passed to the constructor, <code class="computeroutput"><span class="identifier">match_flags</span><span class="special">::</span><span class="identifier">match_default</span></code>
is used, i.e. the <code class="computeroutput"><span class="special">.</span></code> matches
newlines and matching is case sensitive.
</li>
<li class="listitem">
The <code class="computeroutput"><span class="identifier">char_</span><span class="special">()</span></code>
and <code class="computeroutput"><span class="identifier">string</span><span class="special">()</span></code>
placeholders can now be used for token definitions and are synonymous
with <code class="computeroutput"><span class="identifier">token_def</span></code>.
</li>
<li class="listitem">
Lexer semantic actions now have to conform to a changed interface (see
<a class="link" href="../lex/abstracts/lexer_semantic_actions.html" title="Lexer Semantic Actions">Lexer Semantic
Actions</a> for details).
</li>
<li class="listitem">
Added placeholder symbols usable from the inside of lexer semantic actions
while using Phoenix: <code class="computeroutput"><span class="identifier">lex</span><span class="special">::</span><span class="identifier">_start</span></code>,
<code class="computeroutput"><span class="identifier">lex</span><span class="special">::</span><span class="identifier">_end</span></code>, <code class="computeroutput"><span class="identifier">lex</span><span class="special">::</span><span class="identifier">_eoi</span></code>,
<code class="computeroutput"><span class="identifier">lex</span><span class="special">::</span><span class="identifier">_state</span></code>, <code class="computeroutput"><span class="identifier">lex</span><span class="special">::</span><span class="identifier">_val</span></code>,
and <code class="computeroutput"><span class="identifier">lex</span><span class="special">::</span><span class="identifier">_pass</span></code> (see <a class="link" href="../lex/abstracts/lexer_semantic_actions.html" title="Lexer Semantic Actions">Lexer
Semantic Actions</a> for more details).
</li>
<li class="listitem">
Added (lazy) support functions usable from the inside of lexer semantic
actions while using Phoenix: <code class="computeroutput"><span class="identifier">lex</span><span class="special">::</span><span class="identifier">more</span><span class="special">()</span></code>, <code class="computeroutput"><span class="identifier">lex</span><span class="special">::</span><span class="identifier">less</span><span class="special">()</span></code>, and <code class="computeroutput"><span class="identifier">lex</span><span class="special">::</span><span class="identifier">lookahead</span><span class="special">()</span></code> (see <a class="link" href="../lex/abstracts/lexer_semantic_actions.html" title="Lexer Semantic Actions">Lexer
Semantic Actions</a> for more details).
</li>
<li class="listitem">
Removed <code class="computeroutput"><span class="identifier">lex</span><span class="special">::</span><span class="identifier">omitted</span></code> in favor of <code class="computeroutput"><span class="identifier">lex</span><span class="special">::</span><span class="identifier">omit</span></code>
to unify the overall interface.
</li>
</ul></div>
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<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>)
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