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 [syntax_option_type]
['no_empty_expressions] is set then the old behaviour is preserved and
empty expressions are prohibited.  This is issue
[@https://svn.boost.org/trac/boost/ticket/1081 #1081].

Fixes #1081.

[SVN r50374]
This commit is contained in:
John Maddock
2008-12-23 19:06:04 +00:00
parent b4152cd74d
commit e4b31ea37f
25 changed files with 147 additions and 81 deletions

View File

@ -58,7 +58,7 @@
There are three separate localization mechanisms supported by Boost.Regex:
</p>
<a name="boost_regex.background_information.locale.win32_localization_model_"></a><h5>
<a name="id682026"></a>
<a name="id682058"></a>
<a class="link" href="locale.html#boost_regex.background_information.locale.win32_localization_model_">Win32
localization model.</a>
</h5>
@ -90,7 +90,7 @@
are treated as "unknown" graphic characters.
</p>
<a name="boost_regex.background_information.locale.c_localization_model_"></a><h5>
<a name="id682260"></a>
<a name="id682296"></a>
<a class="link" href="locale.html#boost_regex.background_information.locale.c_localization_model_">C
localization model.</a>
</h5>
@ -114,7 +114,7 @@
libraries including version 1 of this library.
</p>
<a name="boost_regex.background_information.locale.c___localization_model_"></a><h5>
<a name="id682372"></a>
<a name="id682409"></a>
<a class="link" href="locale.html#boost_regex.background_information.locale.c___localization_model_">C++
localization model.</a>
</h5>
@ -151,7 +151,7 @@
in your code. The best way to ensure this is to add the #define to <code class="computeroutput"><span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">regex</span><span class="special">/</span><span class="identifier">user</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>.
</p>
<a name="boost_regex.background_information.locale.providing_a_message_catalogue"></a><h5>
<a name="id682832"></a>
<a name="id682868"></a>
<a class="link" href="locale.html#boost_regex.background_information.locale.providing_a_message_catalogue">Providing
a message catalogue</a>
</h5>