leaf/test/handle_some_error_code_test.cpp

// Copyright (c) 2018 Emil Dotchevski
// Copyright (c) 2018 Second Spectrum, 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/error_code.hpp>
#include <boost/leaf/handle.hpp>
#include "boost/core/lightweight_test.hpp"
#include <cstring>

namespace leaf = boost::leaf;

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

int main()
{
	{
		int what=0;
		std::error_code r = leaf::handle_some(
			[&]
			{
				std::error_code ec = get_error_code(leaf::new_error(info<1>{1}));
				BOOST_TEST(ec);
				BOOST_TEST(ec.message()=="LEAF error, use with leaf::handle_some or leaf::handle_all.");
				BOOST_TEST(!std::strcmp(ec.category().name(),"LEAF error, use with leaf::handle_some or leaf::handle_all."));
				return ec;
			},
			[&]( info<1> const & x )
			{
				what = 1;
				BOOST_TEST(x.value==1);
				return std::error_code(ENOENT,std::system_category());
			} );
		BOOST_TEST(r==std::error_code(ENOENT,std::system_category()));
		BOOST_TEST(what==1);
	}
	{
		int what=0;
		std::error_code ec = leaf::handle_some(
			[&]
			{
				return get_error_code(leaf::new_error(info<2>{2},std::error_code(ENOENT,std::system_category())));
			},
			[&]( info<2> const & x, std::error_code const & ec )
			{
				what = 1;
				BOOST_TEST(x.value==2);
				BOOST_TEST(ec==std::error_code(ENOENT,std::system_category()));
				return ec;
			} );
		BOOST_TEST(ec==std::error_code(ENOENT,std::system_category()));
		BOOST_TEST(what==1);
	}
	{
		int what=0;
		std::error_code ec = leaf::handle_some(
			[&]
			{
				return std::error_code(ENOENT,std::system_category());
			},
			[&]( std::error_code const & ec )
			{
				what = 1;
				return ec;
			},
			[&]( leaf::failed<std::error_code> const & ec )
			{
				what = 2;
				BOOST_TEST(ec.value==std::error_code(ENOENT,std::system_category()));
				return ec.value;
			} );
		BOOST_TEST(ec==std::error_code(ENOENT,std::system_category()));
		BOOST_TEST(what==2);
	}
	{
		int what=0;
		std::error_code ec = leaf::handle_some(
			[&]
			{
				return std::error_code(ENOENT,std::system_category());
			},
			[&]( std::error_code const & ec )
			{
				what = 1;
				return ec;
			},
			[&]( leaf::failed<std::error_code> ec )
			{
				what = 2;
				BOOST_TEST(ec.value==std::error_code(ENOENT,std::system_category()));
				return ec.value;
			} );
		BOOST_TEST(ec==std::error_code(ENOENT,std::system_category()));
		BOOST_TEST(what==2);
	}
	{
		int what=0;
		std::error_code ec = leaf::handle_some(
			[&]
			{
				return std::error_code(ENOENT,std::system_category());
			},
			[&]( std::error_code const & ec )
			{
				what = 1;
				return ec;
			},
			[&]( leaf::failed<std::error_code> && ec )
			{
				what = 2;
				BOOST_TEST(ec.value==std::error_code(ENOENT,std::system_category()));
				return ec.value;
			} );
		BOOST_TEST(ec==std::error_code(ENOENT,std::system_category()));
		BOOST_TEST(what==2);
	}
	return boost::report_errors();
}