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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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4
doc/html/boost_regex/ref/concepts/traits_concept.html
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@ -34,7 +34,7 @@
Boost-specific enhanced interface.
</p>
<a name="boost_regex.ref.concepts.traits_concept.minimal_requirements_"></a><h5>
<a name="id661128"></a>
<a name="id661185"></a>
<a class="link" href="traits_concept.html#boost_regex.ref.concepts.traits_concept.minimal_requirements_">Minimal
requirements.</a>
</h5>
@ -381,7 +381,7 @@
</tbody>
</table></div>
<a name="boost_regex.ref.concepts.traits_concept.additional_optional_requirements"></a><h5>
<a name="id661935"></a>
<a name="id661996"></a>
<a class="link" href="traits_concept.html#boost_regex.ref.concepts.traits_concept.additional_optional_requirements">Additional
Optional Requirements</a>
</h5>