leaf/test/context_activator_test.cpp

// Copyright (c) 2018-2019 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"

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()
{
	auto handle_error = []( leaf::error_info const & error )
	{
		return leaf::remote_handle_all( error,
			[]( info<1> x )
			{
				BOOST_TEST(x.value==1);
				return 1;
			},
			[]
			{
				return 2;
			} );
	};

	int r = leaf::remote_try_handle_all(
		[&]
		{
			auto ctx = leaf::make_context(&handle_error);
			auto active_context = activate_context(ctx);
			auto r = f(ctx);
			ctx.propagate();
			return r;
		},
		[&]( leaf::error_info const & error )
		{
			return handle_error(error);
		} );
	BOOST_TEST_EQ(r, 1);

	return boost::report_errors();
}