leaf/test/ctx_handle_all_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_error.hpp>
#include <boost/leaf/result.hpp>
#include "lightweight_test.hpp"
#include <iostream>

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>, leaf::verbose_diagnostic_info const &> ctx;

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

		int r2 = ctx.handle_error<int>(
			r1.error(),
			[]( info<1> x )
			{
				BOOST_TEST(x.value==1);
				return 1;
			},
			[]( leaf::verbose_diagnostic_info const & info )
			{
				std::cout << info;
				return 2;
			} );
		BOOST_TEST_EQ(r2, 1);
	}

	return boost::report_errors();
}