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Empty expressions, and empty alternatives are now

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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
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doc/html/boost_regex/ref/regex_traits.html
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@ -46,7 +46,7 @@
<span class="special">}</span> <span class="comment">// namespace boost
</span></pre>
<a name="boost_regex.ref.regex_traits.description"></a><h5>
<a name="id641773"></a>
<a name="id641830"></a>
<a class="link" href="regex_traits.html#boost_regex.ref.regex_traits.description">Description</a>
</h5>
<p>