Ticket #863: djw_lazy_binding.patch

boost/parameter/keyword.hpp

@@ -6 +6 @@
 #ifndef KEYWORD_050328_HPP
 #define KEYWORD_050328_HPP
 
+#include <boost/lambda/core.hpp>
 #include <boost/parameter/aux_/unwrap_cv_reference.hpp>
 #include <boost/parameter/aux_/tag.hpp>
 #include <boost/parameter/aux_/default.hpp>
@@ -100 +101 @@
     }
 };
 
+template <class Tag, class Default>
+aux::lazy_default<Tag, lambda::lambda_functor<Default> >
+operator||(keyword<Tag> const& key,
+           lambda::lambda_functor<Default>& default_)
+{
+    return key.operator||(default_);
+}
+
+template <class Tag, class Default>
+aux::lazy_default<Tag, lambda::lambda_functor<Default> >
+operator||(keyword<Tag> const& key,
+           lambda::lambda_functor<Default> const& default_)
+{
+    return key.operator||(default_);
+}
+
 template <class Tag>
 keyword<Tag> const keyword<Tag>::instance = {};