92 lines
2.4 KiB
C++
92 lines
2.4 KiB
C++
/* Boost.Flyweight test of assoc_container_factory.
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*
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* Copyright 2006-2018 Joaquin M Lopez Munoz.
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* Distributed under the Boost Software License, Version 1.0.
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* (See accompanying file LICENSE_1_0.txt or copy at
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* http://www.boost.org/LICENSE_1_0.txt)
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*
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* See http://www.boost.org/libs/flyweight for library home page.
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*/
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#include "test_assoc_cont_factory.hpp"
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#include <boost/config.hpp> /* keep it first to prevent nasty warns in MSVC */
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#include <boost/flyweight/assoc_container_factory.hpp>
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#include <boost/flyweight/detail/is_placeholder_expr.hpp>
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#include <boost/flyweight/flyweight.hpp>
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#include <boost/flyweight/refcounted.hpp>
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#include <boost/flyweight/simple_locking.hpp>
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#include <boost/flyweight/static_holder.hpp>
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#include <boost/mpl/if.hpp>
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#include <functional>
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#include <set>
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#include "test_basic_template.hpp"
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using namespace boost::flyweights;
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struct reverse_set_specifier
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{
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template<typename Entry,typename Key>
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struct apply
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{
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typedef std::set<Entry,std::greater<Key> > type;
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};
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};
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struct assoc_container_factory_flyweight_specifier1
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{
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template<typename T>
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struct apply
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{
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typedef flyweight<
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T,
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assoc_container_factory<reverse_set_specifier>
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> type;
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};
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};
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/* flyweight<..., assoc_container_factory_class<std::set<...> >, ...> pulls
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* the type std::set<...> in as part of its associated ADL set and causes it
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* to be instantiated when doing any unqualified function call like, for
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* instance, comparing flyweights for equality, which can trigger a static
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* assertion in concept-checked STL implementations when std::set<...> is an
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* MPL placeholder expression. We avoid this mess with protected_set<...>.
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*/
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struct protected_set_empty_base{};
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template<typename K,typename C,typename A>
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struct protected_set:
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boost::mpl::if_c<
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boost::flyweights::detail::is_placeholder_expression<
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protected_set<K,C,A>
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>::value,
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protected_set_empty_base,
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std::set<K,C,A>
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>::type
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{};
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struct assoc_container_factory_flyweight_specifier2
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{
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template<typename T>
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struct apply
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{
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typedef flyweight<
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T,
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assoc_container_factory_class<
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protected_set<
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boost::mpl::_1,
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std::greater<boost::mpl::_2>,
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std::allocator<boost::mpl::_1>
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>
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>
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> type;
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};
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};
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void test_assoc_container_factory()
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{
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test_basic_template<assoc_container_factory_flyweight_specifier1>();
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test_basic_template<assoc_container_factory_flyweight_specifier2>();
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}
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