import quincy beta 17.1.0

[ceph.git] / ceph / src / boost / libs / leaf / test / ctx_handle_some_test.cpp

// Copyright (c) 2018-2020 Emil Dotchevski and Reverge Studios, Inc.

// 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)

#include <boost/leaf/context.hpp>
#include <boost/leaf/handle_errors.hpp>
#include <boost/leaf/result.hpp>
#include "lightweight_test.hpp"

namespace leaf = boost::leaf;

template <int>
struct info
{
    int value;
};

template <class Ctx>
leaf::result<int> f( Ctx & ctx )
{
    auto active_context = activate_context(ctx);
    return leaf::new_error( info<1>{1} );
}

int main()
{
    leaf::context<info<1>> ctx;

    {
        leaf::result<int> r1 = f(ctx);
        BOOST_TEST(!r1);

        leaf::result<int> r2 = ctx.handle_error<leaf::result<int>>(
            r1.error(),
            []( info<1> x ) -> leaf::result<int>
            {
                BOOST_TEST(x.value==1);
                return 1;
            },
            [&r1]
            {
                return std::move(r1);
            } );
        BOOST_TEST_EQ(r2.value(), 1);
    }

    return boost::report_errors();
}