Subject: [Boost-commit] svn:boost r80528 - trunk/boost/pending
From: jewillco_at_[hidden]
Date: 2012-09-14 17:41:07
Author: jewillco
Date: 2012-09-14 17:41:06 EDT (Fri, 14 Sep 2012)
New Revision: 80528
URL: http://svn.boost.org/trac/boost/changeset/80528
Log:
Using lazy_enable_if to avoid "reference to void" errors for properties that are not found; fixes #7378
Text files modified:
trunk/boost/pending/property.hpp | 6 ++++--
1 files changed, 4 insertions(+), 2 deletions(-)
Modified: trunk/boost/pending/property.hpp
==============================================================================
--- trunk/boost/pending/property.hpp (original)
+++ trunk/boost/pending/property.hpp 2012-09-14 17:41:06 EDT (Fri, 14 Sep 2012)
@@ -123,12 +123,14 @@
typedef lookup_one_property_internal<Base, PropName> base_type;
public:
template <typename PL>
- static typename enable_if<is_same<PL, boost::property<Tag, T, Base> >, typename base_type::type&>::type
+ static typename lazy_enable_if<is_same<PL, boost::property<Tag, T, Base> >,
+ add_reference<typename base_type::type> >::type
lookup(PL& prop, const PropName& tag) {
return base_type::lookup(prop.m_base, tag);
}
template <typename PL>
- static typename enable_if<is_same<PL, boost::property<Tag, T, Base> >, const typename base_type::type&>::type
+ static typename lazy_enable_if<is_same<PL, boost::property<Tag, T, Base> >,
+ add_reference<const typename base_type::type> >::type
lookup(const PL& prop, const PropName& tag) {
return base_type::lookup(prop.m_base, tag);
}