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<div class="titlepage"><div><div><h3 class="title">
<a name="boost_regex.background_information.history"></a><a class="link" href="history.html" title="History"> History</a>
</h3></div></div></div>
<p>
New issues should be submitted at <a href="http://svn.boost.org" target="_top">svn.boost.org</a>
- don't forget to include your email address in the ticket!
</p>
<p>
Currently open issues can be viewed <a href="https://svn.boost.org/trac/boost/query?status=assigned&status=new&status=reopened&component=regex&order=priority&col=id&col=summary&col=status&col=type&col=milestone&col=component" target="_top">here</a>.
</p>
<p>
All issues including closed ones can be viewed <a href="https://svn.boost.org/trac/boost/query?status=assigned&status=closed&status=new&status=reopened&component=regex&order=priority&col=id&col=summary&col=status&col=type&col=milestone&col=component" target="_top">here</a>.
</p>
<a name="boost_regex.background_information.history.boost_1_44"></a><h5>
<a name="id1179232"></a>
<a class="link" href="history.html#boost_regex.background_information.history.boost_1_44">Boost
1.44</a>
</h5>
<p>
Fixed issues: <a href="https://svn.boost.org/trac/boost/ticket/4309" target="_top">#4309</a>,
<a href="https://svn.boost.org/trac/boost/ticket/4215" target="_top">#4215</a>,
<a href="https://svn.boost.org/trac/boost/ticket/4212" target="_top">#4212</a>,
<a href="https://svn.boost.org/trac/boost/ticket/4191" target="_top">#4191</a>,
<a href="https://svn.boost.org/trac/boost/ticket/4132" target="_top">#4132</a>,
<a href="https://svn.boost.org/trac/boost/ticket/4123" target="_top">#4123</a>,
<a href="https://svn.boost.org/trac/boost/ticket/4114" target="_top">#4114</a>,
<a href="https://svn.boost.org/trac/boost/ticket/4036" target="_top">#4036</a>,
<a href="https://svn.boost.org/trac/boost/ticket/4020" target="_top">#4020</a>,
<a href="https://svn.boost.org/trac/boost/ticket/3941" target="_top">#3941</a>,
<a href="https://svn.boost.org/trac/boost/ticket/3902" target="_top">#3902</a>,
<a href="https://svn.boost.org/trac/boost/ticket/3890" target="_top">#3890</a>
</p>
<a name="boost_regex.background_information.history.boost_1_42"></a><h5>
<a name="id1179307"></a>
<a class="link" href="history.html#boost_regex.background_information.history.boost_1_42">Boost
1.42</a>
</h5>
<div class="itemizedlist"><ul type="disc">
<li>
Added support for Functors rather than strings as format expressions.
</li>
<li>
Improved error reporting when throwing exceptions to include better more
relevant information.
</li>
<li>
Improved performance and reduced stack usage of recursive expressions.
</li>
<li>
Fixed tickets <a href="https://svn.boost.org/trac/boost/ticket/2802" target="_top">#2802</a>,
<a href="https://svn.boost.org/trac/boost/ticket/3425" target="_top">#3425</a>,
<a href="https://svn.boost.org/trac/boost/ticket/3507" target="_top">#3507</a>,
<a href="https://svn.boost.org/trac/boost/ticket/3546" target="_top">#3546</a>,
<a href="https://svn.boost.org/trac/boost/ticket/3631" target="_top">#3631</a>,
<a href="https://svn.boost.org/trac/boost/ticket/3632" target="_top">#3632</a>,
<a href="https://svn.boost.org/trac/boost/ticket/3715" target="_top">#3715</a>,
<a href="https://svn.boost.org/trac/boost/ticket/3718" target="_top">#3718</a>,
<a href="https://svn.boost.org/trac/boost/ticket/3763" target="_top">#3763</a>,
<a href="https://svn.boost.org/trac/boost/ticket/3764" target="_top">#3764</a>
</li>
</ul></div>
<a name="boost_regex.background_information.history.boost_1_40"></a><h5>
<a name="id1179400"></a>
<a class="link" href="history.html#boost_regex.background_information.history.boost_1_40">Boost
1.40</a>
</h5>
<div class="itemizedlist"><ul type="disc"><li>
Added support for many Perl 5.10 syntax elements including named sub-expressions,
branch resets and recursive regular expressions.
</li></ul></div>
<a name="boost_regex.background_information.history.boost_1_38"></a><h5>
<a name="id1179424"></a>
<a class="link" href="history.html#boost_regex.background_information.history.boost_1_38">Boost
1.38</a>
</h5>
<div class="itemizedlist"><ul type="disc">
<li>
<span class="bold"><strong>Breaking change</strong></span>: empty expressions,
and empty alternatives are now allowed when using the Perl regular expression
syntax. This change has been added for Perl compatibility, when the new
<a class="link" href="../ref/syntax_option_type.html" title="syntax_option_type"><code class="computeroutput"><span class="identifier">syntax_option_type</span></code></a>
<span class="emphasis"><em>no_empty_expressions</em></span> is set then the old behaviour
is preserved and empty expressions are prohibited. This is issue <a href="https://svn.boost.org/trac/boost/ticket/1081" target="_top">#1081</a>.
</li>
<li>
Added support for Perl style ${n} expressions in format strings (issue
<a href="https://svn.boost.org/trac/boost/ticket/2556" target="_top">#2556</a>).
</li>
<li>
Added support for accessing the location of sub-expressions within the
regular expression string (issue <a href="https://svn.boost.org/trac/boost/ticket/2269" target="_top">#2269</a>).
</li>
<li>
Fixed compiler compatibility issues <a href="https://svn.boost.org/trac/boost/ticket/2244" target="_top">#2244</a>,
<a href="https://svn.boost.org/trac/boost/ticket/2514" target="_top">#2514</a>,
and <a href="https://svn.boost.org/trac/boost/ticket/2244" target="_top">#2458</a>.
</li>
</ul></div>
<a name="boost_regex.background_information.history.boost_1_34"></a><h5>
<a name="id1179517"></a>
<a class="link" href="history.html#boost_regex.background_information.history.boost_1_34">Boost
1.34</a>
</h5>
<div class="itemizedlist"><ul type="disc">
<li>
Fix for non-greedy repeats and partial matches not working correctly
in some cases.
</li>
<li>
Fix for non-greedy repeats on VC++ not working in some cases (bug report
1515830).
</li>
<li>
Changed match_results::position() to return a valid result when *this
represents a partial match.
</li>
<li>
Fixed the grep and egrep options so that the newline character gets treated
the same as |.
</li>
</ul></div>
<a name="boost_regex.background_information.history.boost_1_33_1"></a><h5>
<a name="id1181841"></a>
<a class="link" href="history.html#boost_regex.background_information.history.boost_1_33_1">Boost
1.33.1</a>
</h5>
<div class="itemizedlist"><ul type="disc">
<li>
Fixed broken makefiles.
</li>
<li>
Fixed configuration setup to allow building with VC7.1 - STLport-4.6.2
when using /Zc:wchar_t.
</li>
<li>
Moved declarations class-inline in static_mutex.hpp so that SGI Irix
compiler can cope.
</li>
<li>
Added needed standard library #includes to fileiter.hpp, regex_workaround.hpp
and cpp_regex_traits.hpp.
</li>
<li>
Fixed a bug where non-greedy repeats could in certain strange curcumstances
repeat more times than their maximum value.
</li>
<li>
Fixed the value returned by basic_regex<>::empty() from a default
constructed object.
</li>
<li>
Changed the deffinition of regex_error to make it backwards compatible
with Boost-1.32.0.
</li>
<li>
Disabled external templates for Intel C++ 8.0 and earlier - otherwise
unresolved references can occur.
</li>
<li>
Rewritten extern template code for gcc so that only specific member functions
are exported: otherwise strange unresolved references can occur when
linking and mixing debug and non-debug code.
</li>
<li>
Initialise all the data members of the unicode_iterators: this keeps
gcc from issuing needless warnings.
</li>
<li>
Ported the ICU integration code to VC6 and VC7.
</li>
<li>
Ensured code is STLport debug mode clean.
</li>
<li>
Fixed lookbehind assertions so that fixed length repeats are permitted,
and so that regex iteration allows lookbehind to look back before the
current search range (into the last match).
</li>
<li>
Fixed strange bug with non-greedy repeats inside forward lookahead assertions.
</li>
<li>
Enabled negated character classes inside character sets.
</li>
<li>
Fixed regression so that [a-z-] is a valid expression again.
</li>
<li>
Fixed bug that allowed some invalid expressions to be accepted.
</li>
</ul></div>
<a name="boost_regex.background_information.history.boost_1_33_0"></a><h5>
<a name="id1181980"></a>
<a class="link" href="history.html#boost_regex.background_information.history.boost_1_33_0">Boost
1.33.0</a>
</h5>
<div class="itemizedlist"><ul type="disc">
<li>
Completely rewritten expression parsing code, and traits class support;
now conforms to the standardization proposal.
</li>
<li>
Breaking Change: The syntax options that can be passed to basic_regex
constructors have been rationalized. The default option (perl) now has
a value of zero, and it is now clearly documented which options apply
to which regular expression syntax styles (perl, POSIX-extended, POSIX-basic
etc). Some of the more esoteric options have now been removed, so there
is the possibility that existing code may fail to compile: however equivalent
functionality should still be available.
</li>
<li>
Breaking Change: POSIX-extended and POSIX-basic regular expressions now
enforce the letter of the POSIX standard much more closely than before.
</li>
<li>
Added support for (?imsx-imsx) constructs.
</li>
<li>
Added support for lookbehind expressions (?<=positive-lookbehind)
and (?<!negative-lookbehind).
</li>
<li>
Added support for conditional expressions (?(assertion)true-expresion|false-expression).
</li>
<li>
Added MFC/ATL string wrappers.
</li>
<li>
Added Unicode support; based on ICU.
</li>
<li>
Changed newline support to recognise \f as a line separator (all character
types), and \x85 as a line separator for wide characters / Unicode only.
</li>
<li>
Added a new format flag format_literal that treats the replace string
as a literal, rather than a Perl or Sed style format string.
</li>
<li>
Errors are now reported by throwing exceptions of type regex_error. The
types used previously - bad_expression and bad_pattern - are now just
typedefs for regex_error. Type regex_error has a couple of new members:
code() to report an error code rather than a string, and position() to
report where in the expression the error occured.
</li>
</ul></div>
<a name="boost_regex.background_information.history.boost_1_32_1"></a><h5>
<a name="id1182077"></a>
<a class="link" href="history.html#boost_regex.background_information.history.boost_1_32_1">Boost
1.32.1</a>
</h5>
<div class="itemizedlist"><ul type="disc"><li>
Fixed bug in partial matches of bounded repeats of '.'.
</li></ul></div>
<a name="boost_regex.background_information.history.boost_1_31_0"></a><h5>
<a name="id1182101"></a>
<a class="link" href="history.html#boost_regex.background_information.history.boost_1_31_0">Boost
1.31.0</a>
</h5>
<div class="itemizedlist"><ul type="disc">
<li>
Completely rewritten pattern matching code - it is now up to 10 times
faster than before.
</li>
<li>
Reorganized documentation.
</li>
<li>
Deprecated all interfaces that are not part of the regular expression
standardization proposal.
</li>
<li>
Added regex_iterator and regex_token_iterator .
</li>
<li>
Added support for Perl style independent sub-expressions.
</li>
<li>
Added non-member operators to the sub_match class, so that you can compare
sub_match's with strings, or add them to a string to produce a new string.
</li>
<li>
Added experimental support for extended capture information.
</li>
<li>
Changed the match flags so that they are a distinct type (not an integer),
if you try to pass the match flags as an integer rather than match_flag_type
to the regex algorithms then you will now get a compiler error.
</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 © 1998 -2007 John Maddock<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>
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