leaf/test/boost_exception_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/config.hpp>
#if defined(BOOST_LEAF_NO_EXCEPTIONS)

#include <iostream>

int main()
{
	std::cout << "Unit test not applicable." << std::endl;
	return 0;
}

#else

#include <boost/leaf/handle_exception.hpp>
#include <boost/leaf/pred.hpp>
#include <boost/exception/info.hpp>
#include <boost/exception/get_error_info.hpp>
#include "lightweight_test.hpp"

namespace leaf = boost::leaf;

struct test_ex: std::exception { };

typedef boost::error_info<struct test_info_, int> test_info;

int main()
{
	{
		int r = leaf::try_catch(
			[]
			{
				try
				{
					boost::throw_exception(test_ex());
				}
				catch( boost::exception & ex )
				{
					ex << test_info(42);
					throw;
				}
				return 0;
			},
			[]( test_info x )
			{
				BOOST_TEST_EQ(x.value(), 42);
				return 1;
			},
			[]
			{
				return 2;
			} );
		BOOST_TEST_EQ(r, 1);
	}

	{
		int r = leaf::try_catch(
			[]
			{
				try
				{
					boost::throw_exception(test_ex());
				}
				catch( boost::exception & ex )
				{
					ex << test_info(42);
					throw;
				}
				return 0;
			},
			[]( leaf::match<test_info, 42> )
			{
				return 1;
			},
			[]
			{
				return 2;
			} );
		BOOST_TEST_EQ(r, 1);
	}

	{
		int r = leaf::try_catch(
			[]
			{
				try
				{
					boost::throw_exception(test_ex());
				}
				catch( boost::exception & ex )
				{
					ex << test_info(42);
					throw;
				}
				return 0;
			},
			[]( leaf::match<test_info, 41> )
			{
				return 1;
			},
			[]
			{
				return 2;
			} );
		BOOST_TEST_EQ(r, 2);
	}

	return boost::report_errors();
}

#endif