[Boost-commit] svn:boost r63097 - trunk/boost/spirit/home/support

Subject: [Boost-commit] svn:boost r63097 - trunk/boost/spirit/home/support
From: hartmut.kaiser_at_[hidden]
Date: 2010-06-19 08:52:23

Author: hkaiser
Date: 2010-06-19 08:52:23 EDT (Sat, 19 Jun 2010)
New Revision: 63097
URL: http://svn.boost.org/trac/boost/changeset/63097

Log:
Spirit: adding debug support for optional attributes
Text files modified: 
   trunk/boost/spirit/home/support/attributes.hpp |     9 +++++++++                               
   1 files changed, 9 insertions(+), 0 deletions(-)

Modified: trunk/boost/spirit/home/support/attributes.hpp
==============================================================================
--- trunk/boost/spirit/home/support/attributes.hpp	(original)
+++ trunk/boost/spirit/home/support/attributes.hpp	2010-06-19 08:52:23 EDT (Sat, 19 Jun 2010)
@@ -867,6 +867,15 @@
         detail::print_attribute_impl(out, val, 
             mpl::and_<is_container<T>, not_is_variant<T, void> >());
     }
+
+    template <typename Out, typename T>
+    inline void print_attribute(Out& out, boost::optional<T> const& val)
+    {
+        if (val)
+            print_attribute(out, val);
+        else
+            out << "<empty>";
+    }
 }}}
 
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