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

namespace leaf = boost::leaf;

int global;

int get_global() noexcept
{
    return global;
}

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

leaf::error_id g()
{
    global = 0;
    auto load = leaf::on_error( []{ return info<42>{get_global()}; }, []{ return info<-42>{-42}; } );
    global = 42;
    return leaf::new_error();
}

leaf::error_id f()
{
    return g();
}

int main()
{
    int r = leaf::try_handle_all(
        []() -> leaf::result<int>
        {
            return f();
        },
        []( info<42> const & i42, leaf::diagnostic_info const & di )
        {
            BOOST_TEST_EQ(i42.value, 42);
            std::stringstream ss; ss << di;
            std::string s = ss.str();
            std::cout << s;
#if BOOST_LEAF_DIAGNOSTICS
            BOOST_TEST(s.find("info<-42>")!=s.npos);
#else
            BOOST_TEST(s.find("BOOST_LEAF_DIAGNOSTICS")!=s.npos);
#endif
            return 1;
        },
        []
        {
            return 2;
        } );
    BOOST_TEST_EQ(r, 1);
    return boost::report_errors();
}
