68 lines
1.8 KiB
C++
68 lines
1.8 KiB
C++
// Copyright 2018-2022 Emil Dotchevski and Reverge Studios, Inc.
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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#ifdef BOOST_LEAF_TEST_SINGLE_HEADER
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# include "leaf.hpp"
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#else
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# include <boost/leaf/result.hpp>
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# include <boost/leaf/handle_errors.hpp>
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# include <boost/leaf/pred.hpp>
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#endif
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#include "lightweight_test.hpp"
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namespace leaf = boost::leaf;
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template <int> struct info { int value; };
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template <class T>
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leaf::result<T> test()
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{
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leaf::result<T> r1 = leaf::new_error(info<42>{40});
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leaf::result<T> r2 = r1.load(info<1>{});
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leaf::result<T> r3 = r2.load(info<2>{2}, []{ return info<3>{3}; });
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leaf::result<T> r4 = r3.load([](info<42> & x){ ++x.value; });
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leaf::result<T> r5 = r4.load([](info<42> & x){ ++x.value; }, [](info<1> & x){ ++x.value; });
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return r5;
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}
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int main()
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{
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{
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int r = leaf::try_handle_all(
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[]
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{
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return test<int>();
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},
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[]( leaf::match_value<info<42>, 42>, leaf::match_value<info<1>, 1>, leaf::match_value<info<2>, 2>, leaf::match_value<info<3>, 3> )
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{
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return 1;
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},
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[]
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{
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return 2;
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} );
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BOOST_TEST_EQ(r, 1);
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}
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{
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int r = leaf::try_handle_all(
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[]() -> leaf::result<int>
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{
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BOOST_LEAF_CHECK(test<void>());
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return 0;
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},
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[]( leaf::match_value<info<42>, 42>, leaf::match_value<info<1>, 1>, leaf::match_value<info<2>, 2>, leaf::match_value<info<3>, 3> )
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{
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return 1;
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},
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[]
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{
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return 2;
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} );
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BOOST_TEST_EQ(r, 1);
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}
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return boost::report_errors();
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}
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