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[ceph.git] / ceph / src / boost / libs / flyweight / test / test_assoc_cont_factory.cpp

diff --git a/ceph/src/boost/libs/flyweight/test/test_assoc_cont_factory.cpp b/ceph/src/boost/libs/flyweight/test/test_assoc_cont_factory.cpp
index cac11c98b5304fbac7df8eae7a11cd5ef3e01e5d..078ff4aec9c2eb0aaf10f9055dcc226e6b9c01b8 100644 (file)
--- a/ceph/src/boost/libs/flyweight/test/test_assoc_cont_factory.cpp
+++ b/ceph/src/boost/libs/flyweight/test/test_assoc_cont_factory.cpp
@@ -1,6 +1,6 @@
 /* Boost.Flyweight test of assoc_container_factory.
  *
- * Copyright 2006-2008 Joaquin M Lopez Munoz.
+ * Copyright 2006-2018 Joaquin M Lopez Munoz.
  * Distributed under the Boost Software License, Version 1.0.
  * (See accompanying file LICENSE_1_0.txt or copy at
  * http://www.boost.org/LICENSE_1_0.txt)
@@ -12,10 +12,12 @@
 
 #include <boost/config.hpp> /* keep it first to prevent nasty warns in MSVC */
 #include <boost/flyweight/assoc_container_factory.hpp> 
+#include <boost/flyweight/detail/is_placeholder_expr.hpp>
 #include <boost/flyweight/flyweight.hpp>
 #include <boost/flyweight/refcounted.hpp>
 #include <boost/flyweight/simple_locking.hpp>
 #include <boost/flyweight/static_holder.hpp>
+#include <boost/mpl/if.hpp>
 #include <functional>
 #include <set>
 #include "test_basic_template.hpp"
@@ -43,6 +45,27 @@ struct assoc_container_factory_flyweight_specifier1
   };
 };
 
+/* flyweight<..., assoc_container_factory_class<std::set<...> >, ...> pulls
+ * the type std::set<...> in as part of its associated ADL set and causes it
+ * to be instantiated when doing any unqualified function call like, for
+ * instance, comparing flyweights for equality, which can trigger a static
+ * assertion in concept-checked STL implementations when std::set<...> is an
+ * MPL placeholder expression. We avoid this mess with protected_set<...>.
+ */
+
+struct protected_set_empty_base{};
+
+template<typename K,typename C,typename A>
+struct protected_set:
+  boost::mpl::if_c<
+    boost::flyweights::detail::is_placeholder_expression<
+      protected_set<K,C,A>
+    >::value,
+    protected_set_empty_base,
+    std::set<K,C,A>
+  >::type
+{};
+
 struct assoc_container_factory_flyweight_specifier2
 {
   template<typename T>
@@ -51,7 +74,7 @@ struct assoc_container_factory_flyweight_specifier2
     typedef flyweight<
       T,
       assoc_container_factory_class<
-        std::set<
+        protected_set<
           boost::mpl::_1,
           std::greater<boost::mpl::_2>,
           std::allocator<boost::mpl::_1>