64 lines
1.4 KiB
C++
64 lines
1.4 KiB
C++
// Copyright (c) 2018-2021 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/on_error.hpp>
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# include <boost/leaf/handle_errors.hpp>
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# include <boost/leaf/result.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>
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struct info
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{
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int value;
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};
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leaf::error_id f0()
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{
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auto load = leaf::on_error( [] { return info<0>{0}; } );
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return leaf::new_error( info<2>{2} );
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}
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leaf::error_id f1()
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{
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auto load = leaf::on_error( [] { return info<0>{-1}; }, [] { return info<1>{1}; }, [] { return info<2>{-1}; } );
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return f0();
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}
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leaf::error_id f2()
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{
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return f1().load( info<3>{3} );
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}
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int main()
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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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return f2();
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},
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[]( info<0> i0, info<1> i1, info<2> i2, info<3> i3 )
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{
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BOOST_TEST_EQ(i0.value, 0);
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BOOST_TEST_EQ(i1.value, 1);
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BOOST_TEST_EQ(i2.value, 2);
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BOOST_TEST_EQ(i3.value, 3);
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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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return boost::report_errors();
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}
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