boost/poly_collection/variant_collection.hpp

0001 /* Copyright 2024 Joaquin M Lopez Munoz.
0002  * Distributed under the Boost Software License, Version 1.0.
0003  * (See accompanying file LICENSE_1_0.txt or copy at
0004  * http://www.boost.org/LICENSE_1_0.txt)
0005  *
0006  * See http://www.boost.org/libs/poly_collection for library home page.
0007  */
0008
0009 #ifndef BOOST_POLY_COLLECTION_VARIANT_COLLECTION_HPP
0010 #define BOOST_POLY_COLLECTION_VARIANT_COLLECTION_HPP
0011
0012 #if defined(_MSC_VER)
0013 #pragma once
0014 #endif
0015
0016 #include <boost/poly_collection/variant_collection_fwd.hpp>
0017 #include <boost/mp11/list.hpp>
0018 #include <boost/poly_collection/detail/variant_model.hpp>
0019 #include <boost/poly_collection/detail/poly_collection.hpp>
0020 #include <utility>
0021
0022 namespace boost{
0023
0024 namespace poly_collection{
0025
0026 template<typename TypeList,typename Allocator>
0027 class variant_collection:
0028   public common_impl::poly_collection<
0029     mp11::mp_rename<TypeList,detail::variant_model>,Allocator>
0030 {
0031   using base_type=common_impl::poly_collection<
0032     mp11::mp_rename<TypeList,detail::variant_model>,Allocator>;
0033
0034   base_type&       base()noexcept{return *this;}
0035   const base_type& base()const noexcept{return *this;}
0036
0037 public:
0038   using base_type::base_type;
0039
0040   variant_collection()=default;
0041   variant_collection(const variant_collection& x)=default;
0042   variant_collection(variant_collection&& x)=default;
0043   variant_collection& operator=(const variant_collection& x)=default;
0044   variant_collection& operator=(variant_collection&& x)=default;
0045
0046   template<typename TL,typename A>
0047   friend bool operator==(
0048     const variant_collection<TL,A>&,const variant_collection<TL,A>&);
0049 };
0050
0051 template<typename TypeList,typename Allocator>
0052 bool operator==(
0053   const variant_collection<TypeList,Allocator>& x,
0054   const variant_collection<TypeList,Allocator>& y)
0055 {
0056   return x.base()==y.base();
0057 }
0058
0059 template<typename TypeList,typename Allocator>
0060 bool operator!=(
0061   const variant_collection<TypeList,Allocator>& x,
0062   const variant_collection<TypeList,Allocator>& y)
0063 {
0064   return !(x==y);
0065 }
0066
0067 // TODO: other rel operators?
0068
0069 template<typename TypeList,typename Allocator>
0070 void swap(
0071   variant_collection<TypeList,Allocator>& x,
0072   variant_collection<TypeList,Allocator>& y)
0073 {
0074   x.swap(y);
0075 }
0076
0077 } /* namespace  */
0078
0079 using poly_collection::variant_collection;
0080
0081 } /* namespace boost */
0082
0083 #endif