86 lines
2.0 KiB
C++
86 lines
2.0 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/result.hpp>
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# include <boost/leaf/handle_errors.hpp>
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#endif
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#include "lightweight_test.hpp"
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#ifdef BOOST_LEAF_BOOST_AVAILABLE
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# include <boost/config/workaround.hpp>
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#else
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# define BOOST_WORKAROUND(a,b) 0
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#endif
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namespace leaf = boost::leaf;
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struct value
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{
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int x;
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explicit value( int x ): x(x) { };
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value( value const & ) = delete;
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value( value && ) = default;
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};
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leaf::result<value> f1()
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{
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return value { 21 };
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}
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leaf::result<value> f2()
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{
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BOOST_LEAF_ASSIGN(auto a, f1());
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#if BOOST_WORKAROUND( BOOST_GCC, < 50000 ) || BOOST_WORKAROUND( BOOST_CLANG, <= 30800 )
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return std::move(a); // Older compilers are confused, but...
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#else
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return a; // ...this doesn't need to be return std::move(a);
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#endif
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}
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leaf::result<value> f3()
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{
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BOOST_LEAF_ASSIGN(auto a, f2());
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BOOST_LEAF_ASSIGN(auto b, f2()); // Invoking the macro twice in the same scope, testing the temp name generation
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return value { a.x + b.x };
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}
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int main()
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{
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BOOST_TEST_EQ(f3()->x, 42);
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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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int x = 42;
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leaf::result<int> r1(x);
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BOOST_LEAF_ASSIGN(auto && rx1, r1);
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BOOST_TEST_EQ(r1.value(), rx1);
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leaf::result<int &> r2(x);
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BOOST_LEAF_ASSIGN(auto && rx2, r2);
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BOOST_TEST_EQ(r2.value(), rx2);
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leaf::result<int &> r3(x);
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BOOST_LEAF_ASSIGN(auto & rx3, r3);
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BOOST_TEST_EQ(&r3.value(), &rx3);
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return 0;
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},
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[]
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{
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return 1;
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} );
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BOOST_TEST_EQ(r, 0);
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}
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return boost::report_errors();
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}
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