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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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