leaf/test/context_activator_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_errors.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 error_handlers = std::make_tuple(
		[]( info<1> x )
		{
			BOOST_TEST(x.value==1);
			return 1;
		},
		[]
		{
			return 2;
		} );

	int r = leaf::try_handle_all(
		[&]
		{
			auto ctx = leaf::make_context(error_handlers);
			auto active_context = activate_context(ctx);
			auto r = f(ctx);
			ctx.propagate();
			return r;
		},
		error_handlers );
	BOOST_TEST_EQ(r, 1);

	return boost::report_errors();
}