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<div class="section">
<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>
<h5>
<a name="boost_regex.background_information.history.h0"></a>
<span class="phrase"><a name="boost_regex.background_information.history.boost_regex_5_0_0__boost_1_56_0_"></a></span><a class="link" href="history.html#boost_regex.background_information.history.boost_regex_5_0_0__boost_1_56_0_">Boost.Regex-5.0.0
(Boost-1.56.0)</a>
</h5>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
Moved to library-specific version number post the move to Git. And since
we have one (minor) breaking change this gets bumped up from v4 to v5.
</li>
<li class="listitem">
<span class="bold"><strong>Breaking change:</strong></span> corrected behavior
of <code class="computeroutput"><span class="identifier">basic_regex</span><span class="special"><>::</span><span class="identifier">mark_count</span><span class="special">()</span></code>
to match existing documentation, <code class="computeroutput"><span class="identifier">basic_regex</span><span class="special"><>::</span><span class="identifier">subexpression</span><span class="special">(</span><span class="identifier">n</span><span class="special">)</span></code> changed to match, see <a href="https://svn.boost.org/trac/boost/ticket/9227" target="_top">#9227</a>
</li>
<li class="listitem">
Fixed issue <a href="https://svn.boost.org/trac/boost/ticket/8903" target="_top">#8903</a>.
</li>
<li class="listitem">
Fixed documentation typos from <a href="https://svn.boost.org/trac/boost/ticket/9283" target="_top">#9283</a>.
</li>
<li class="listitem">
Fixed bug in collation code that failed if the locale generated collation
strings with embedded nul's, see <a href="https://svn.boost.org/trac/boost/ticket/9451" target="_top">#9451</a>.
</li>
<li class="listitem">
Apply patch for unusual thread usage (no statically initiallized mutexes),
see <a href="https://svn.boost.org/trac/boost/ticket/9461" target="_top">#9461</a>.
</li>
<li class="listitem">
Added better checks for invalid UTF-8 sequences, see <a href="https://svn.boost.org/trac/boost/ticket/9473" target="_top">#9473</a>.
</li>
</ul></div>
<h5>
<a name="boost_regex.background_information.history.h1"></a>
<span class="phrase"><a name="boost_regex.background_information.history.boost_1_54"></a></span><a class="link" href="history.html#boost_regex.background_information.history.boost_1_54">Boost-1.54</a>
</h5>
<p>
Fixed issue <a href="https://svn.boost.org/trac/boost/ticket/8569" target="_top">#8569</a>.
</p>
<h5>
<a name="boost_regex.background_information.history.h2"></a>
<span class="phrase"><a name="boost_regex.background_information.history.boost_1_53"></a></span><a class="link" href="history.html#boost_regex.background_information.history.boost_1_53">Boost-1.53</a>
</h5>
<p>
Fixed Issues: <a href="https://svn.boost.org/trac/boost/ticket/7744" target="_top">#7744</a>,
<a href="https://svn.boost.org/trac/boost/ticket/7644" target="_top">#7644</a>.
</p>
<h5>
<a name="boost_regex.background_information.history.h3"></a>
<span class="phrase"><a name="boost_regex.background_information.history.boost_1_51"></a></span><a class="link" href="history.html#boost_regex.background_information.history.boost_1_51">Boost-1.51</a>
</h5>
<p>
Fixed issues: <a href="https://svn.boost.org/trac/boost/ticket/589" target="_top">#589</a>,
<a href="https://svn.boost.org/trac/boost/ticket/7084" target="_top">#7084</a>,
<a href="https://svn.boost.org/trac/boost/ticket/7032" target="_top">#7032</a>,
<a href="https://svn.boost.org/trac/boost/ticket/6346" target="_top">#6346</a>.
</p>
<h5>
<a name="boost_regex.background_information.history.h4"></a>
<span class="phrase"><a name="boost_regex.background_information.history.boost_1_50"></a></span><a class="link" href="history.html#boost_regex.background_information.history.boost_1_50">Boost-1.50</a>
</h5>
<p>
Fixed issue with <code class="computeroutput"><span class="special">(?!)</span></code> not being
a valid expression, and updated docs on what constitutes a valid conditional
expression.
</p>
<h5>
<a name="boost_regex.background_information.history.h5"></a>
<span class="phrase"><a name="boost_regex.background_information.history.boost_1_48"></a></span><a class="link" href="history.html#boost_regex.background_information.history.boost_1_48">Boost-1.48</a>
</h5>
<p>
Fixed issues: <a href="https://svn.boost.org/trac/boost/ticket/688" target="_top">#698</a>,
<a href="https://svn.boost.org/trac/boost/ticket/5835" target="_top">#5835</a>,
<a href="https://svn.boost.org/trac/boost/ticket/5958" target="_top">#5958</a>,
<a href="https://svn.boost.org/trac/boost/ticket/5736" target="_top">#5736</a>.
</p>
<h5>
<a name="boost_regex.background_information.history.h6"></a>
<span class="phrase"><a name="boost_regex.background_information.history.boost_1_47"></a></span><a class="link" href="history.html#boost_regex.background_information.history.boost_1_47">Boost 1.47</a>
</h5>
<p>
Fixed issues: <a href="https://svn.boost.org/trac/boost/ticket/5223" target="_top">#5223</a>,
<a href="https://svn.boost.org/trac/boost/ticket/5353" target="_top">#5353</a>,
<a href="https://svn.boost.org/trac/boost/ticket/5363" target="_top">#5363</a>,
<a href="https://svn.boost.org/trac/boost/ticket/5462" target="_top">#5462</a>,
<a href="https://svn.boost.org/trac/boost/ticket/5472" target="_top">#5472</a>,
<a href="https://svn.boost.org/trac/boost/ticket/5504" target="_top">#5504</a>.
</p>
<h5>
<a name="boost_regex.background_information.history.h7"></a>
<span class="phrase"><a name="boost_regex.background_information.history.boost_1_44"></a></span><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>
<h5>
<a name="boost_regex.background_information.history.h8"></a>
<span class="phrase"><a name="boost_regex.background_information.history.boost_1_42"></a></span><a class="link" href="history.html#boost_regex.background_information.history.boost_1_42">Boost 1.42</a>
</h5>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
Added support for Functors rather than strings as format expressions.
</li>
<li class="listitem">
Improved error reporting when throwing exceptions to include better more
relevant information.
</li>
<li class="listitem">
Improved performance and reduced stack usage of recursive expressions.
</li>
<li class="listitem">
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>
<h5>
<a name="boost_regex.background_information.history.h9"></a>
<span class="phrase"><a name="boost_regex.background_information.history.boost_1_40"></a></span><a class="link" href="history.html#boost_regex.background_information.history.boost_1_40">Boost 1.40</a>
</h5>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">
Added support for many Perl 5.10 syntax elements including named sub-expressions,
branch resets and recursive regular expressions.
</li></ul></div>
<h5>
<a name="boost_regex.background_information.history.h10"></a>
<span class="phrase"><a name="boost_regex.background_information.history.boost_1_38"></a></span><a class="link" href="history.html#boost_regex.background_information.history.boost_1_38">Boost 1.38</a>
</h5>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
<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 class="listitem">
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 class="listitem">
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 class="listitem">
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>
<h5>
<a name="boost_regex.background_information.history.h11"></a>
<span class="phrase"><a name="boost_regex.background_information.history.boost_1_34"></a></span><a class="link" href="history.html#boost_regex.background_information.history.boost_1_34">Boost 1.34</a>
</h5>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
Fix for non-greedy repeats and partial matches not working correctly
in some cases.
</li>
<li class="listitem">
Fix for non-greedy repeats on VC++ not working in some cases (bug report
1515830).
</li>
<li class="listitem">
Changed match_results::position() to return a valid result when *this
represents a partial match.
</li>
<li class="listitem">
Fixed the grep and egrep options so that the newline character gets treated
the same as |.
</li>
</ul></div>
<h5>
<a name="boost_regex.background_information.history.h12"></a>
<span class="phrase"><a name="boost_regex.background_information.history.boost_1_33_1"></a></span><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 class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
Fixed broken makefiles.
</li>
<li class="listitem">
Fixed configuration setup to allow building with VC7.1 - STLport-4.6.2
when using /Zc:wchar_t.
</li>
<li class="listitem">
Moved declarations class-inline in static_mutex.hpp so that SGI Irix
compiler can cope.
</li>
<li class="listitem">
Added needed standard library #includes to fileiter.hpp, regex_workaround.hpp
and cpp_regex_traits.hpp.
</li>
<li class="listitem">
Fixed a bug where non-greedy repeats could in certain strange circumstances
repeat more times than their maximum value.
</li>
<li class="listitem">
Fixed the value returned by basic_regex<>::empty() from a default
constructed object.
</li>
<li class="listitem">
Changed the definition of regex_error to make it backwards compatible
with Boost-1.32.0.
</li>
<li class="listitem">
Disabled external templates for Intel C++ 8.0 and earlier - otherwise
unresolved references can occur.
</li>
<li class="listitem">
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 class="listitem">
Initialise all the data members of the unicode_iterators: this keeps
gcc from issuing needless warnings.
</li>
<li class="listitem">
Ported the ICU integration code to VC6 and VC7.
</li>
<li class="listitem">
Ensured code is STLport debug mode clean.
</li>
<li class="listitem">
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 class="listitem">
Fixed strange bug with non-greedy repeats inside forward lookahead assertions.
</li>
<li class="listitem">
Enabled negated character classes inside character sets.
</li>
<li class="listitem">
Fixed regression so that [a-z-] is a valid expression again.
</li>
<li class="listitem">
Fixed bug that allowed some invalid expressions to be accepted.
</li>
</ul></div>
<h5>
<a name="boost_regex.background_information.history.h13"></a>
<span class="phrase"><a name="boost_regex.background_information.history.boost_1_33_0"></a></span><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 class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
Completely rewritten expression parsing code, and traits class support;
now conforms to the standardization proposal.
</li>
<li class="listitem">
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 class="listitem">
Breaking Change: POSIX-extended and POSIX-basic regular expressions now
enforce the letter of the POSIX standard much more closely than before.
</li>
<li class="listitem">
Added support for (?imsx-imsx) constructs.
</li>
<li class="listitem">
Added support for lookbehind expressions (?<=positive-lookbehind)
and (?<!negative-lookbehind).
</li>
<li class="listitem">
Added support for conditional expressions (?(assertion)true-expresion|false-expression).
</li>
<li class="listitem">
Added MFC/ATL string wrappers.
</li>
<li class="listitem">
Added Unicode support; based on ICU.
</li>
<li class="listitem">
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 class="listitem">
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 class="listitem">
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 occurred.
</li>
</ul></div>
<h5>
<a name="boost_regex.background_information.history.h14"></a>
<span class="phrase"><a name="boost_regex.background_information.history.boost_1_32_1"></a></span><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 class="itemizedlist" style="list-style-type: disc; "><li class="listitem">
Fixed bug in partial matches of bounded repeats of '.'.
</li></ul></div>
<h5>
<a name="boost_regex.background_information.history.h15"></a>
<span class="phrase"><a name="boost_regex.background_information.history.boost_1_31_0"></a></span><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 class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
Completely rewritten pattern matching code - it is now up to 10 times
faster than before.
</li>
<li class="listitem">
Reorganized documentation.
</li>
<li class="listitem">
Deprecated all interfaces that are not part of the regular expression
standardization proposal.
</li>
<li class="listitem">
Added regex_iterator and regex_token_iterator .
</li>
<li class="listitem">
Added support for Perl style independent sub-expressions.
</li>
<li class="listitem">
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 class="listitem">
Added experimental support for extended capture information.
</li>
<li class="listitem">
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>
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<td align="right"><div class="copyright-footer">Copyright © 1998-2013 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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