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- /* Boost.Flyweight test of assoc_container_factory.
- *
- * 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)
- *
- * See http://www.boost.org/libs/flyweight for library home page.
- */
- #include "test_assoc_cont_factory.hpp"
- #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"
- using namespace boost::flyweights;
- struct reverse_set_specifier
- {
- template<typename Entry,typename Key>
- struct apply
- {
- typedef std::set<Entry,std::greater<Key> > type;
- };
- };
- struct assoc_container_factory_flyweight_specifier1
- {
- template<typename T>
- struct apply
- {
- typedef flyweight<
- T,
- assoc_container_factory<reverse_set_specifier>
- > type;
- };
- };
- /* 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>
- struct apply
- {
- typedef flyweight<
- T,
- assoc_container_factory_class<
- protected_set<
- boost::mpl::_1,
- std::greater<boost::mpl::_2>,
- std::allocator<boost::mpl::_1>
- >
- >
- > type;
- };
- };
- void test_assoc_container_factory()
- {
- test_basic_template<assoc_container_factory_flyweight_specifier1>();
- test_basic_template<assoc_container_factory_flyweight_specifier2>();
- }
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