977ed18d
 Hu Chunming
提交三方库
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// Copyright 2021 Peter Dimov
// Distributed under the Boost Software License, Version 1.0.
// https://www.boost.org/LICENSE_1_0.txt
#include <boost/describe.hpp>
#include <boost/mp11.hpp>
#include <boost/variant2/variant.hpp>
#include <vector>
using namespace boost::describe;
namespace app
{
template<class T,
class Bd = describe_bases<T, mod_any_access>,
class Md = describe_members<T, mod_any_access>,
class En = std::enable_if_t<!std::is_union<T>::value> >
bool operator==( T const& t1, T const& t2 )
{
bool r = true;
boost::mp11::mp_for_each<Bd>([&](auto D){
using B = typename decltype(D)::type;
r = r && (B const&)t1 == (B const&)t2;
});
boost::mp11::mp_for_each<Md>([&](auto D){
r = r && t1.*D.pointer == t2.*D.pointer;
});
return r;
}
struct A
{
int x = 1;
};
BOOST_DESCRIBE_STRUCT(A, (), (x))
struct B
{
int y = 2;
};
BOOST_DESCRIBE_STRUCT(B, (), (y))
struct C
{
std::vector<boost::variant2::variant<A, B>> v;
};
BOOST_DESCRIBE_STRUCT(C, (), (v))
} // namespace app
#include <iostream>
int main()
{
app::C c1, c2, c3;
c1.v.push_back( app::A{} );
c2.v.push_back( app::A{} );
c3.v.push_back( app::B{} );
std::cout << std::boolalpha
<< ( c1 == c2 ) << ' '
<< ( c1 == c3 ) << std::endl;
}
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