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123 lines
3.2 KiB
C++
123 lines
3.2 KiB
C++
// Copyright (C) 2017 Andrzej Krzemienski.
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//
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// Use, modification, and distribution is subject to the Boost Software
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// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//
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// See http://www.boost.org/lib/optional for documentation.
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//
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// You are welcome to contact the author at:
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// akrzemi1@gmail.com
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#include "boost/optional/optional.hpp"
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#ifdef __BORLANDC__
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#pragma hdrstop
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#endif
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#include "boost/core/ignore_unused.hpp"
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#include "boost/core/is_same.hpp"
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#include "boost/core/lightweight_test.hpp"
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#include "boost/core/lightweight_test_trait.hpp"
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using boost::optional;
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using boost::make_optional;
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using boost::core::is_same;
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template <typename Expected, typename Deduced>
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void verify_type(Deduced)
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{
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BOOST_TEST_TRAIT_TRUE(( is_same<Expected, Deduced> ));
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}
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#if (!defined BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES)
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struct MoveOnly
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{
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int value;
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explicit MoveOnly(int i) : value(i) {}
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MoveOnly(MoveOnly && r) : value(r.value) { r.value = 0; }
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MoveOnly& operator=(MoveOnly && r) { value = r.value; r.value = 0; return *this; }
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private:
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MoveOnly(MoveOnly const&);
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void operator=(MoveOnly const&);
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};
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MoveOnly makeMoveOnly(int i)
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{
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return MoveOnly(i);
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}
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void test_make_optional_for_move_only_type()
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{
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verify_type< optional<MoveOnly> >(make_optional(makeMoveOnly(2)));
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verify_type< optional<MoveOnly> >(make_optional(true, makeMoveOnly(2)));
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optional<MoveOnly> o1 = make_optional(makeMoveOnly(1));
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BOOST_TEST (o1);
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BOOST_TEST_EQ (1, o1->value);
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optional<MoveOnly> o2 = make_optional(true, makeMoveOnly(2));
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BOOST_TEST (o2);
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BOOST_TEST_EQ (2, o2->value);
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optional<MoveOnly> oN = make_optional(false, makeMoveOnly(2));
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BOOST_TEST (!oN);
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}
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#endif // !defined BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES
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void test_make_optional_for_optional()
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{
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optional<int> oi;
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verify_type< optional< optional<int> > >(make_optional(oi));
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verify_type< optional< optional<int> > >(make_optional(true, oi));
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optional< optional<int> > ooi = make_optional(oi);
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BOOST_TEST (ooi);
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BOOST_TEST (!*ooi);
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optional< optional<int> > ooT = make_optional(true, oi);
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BOOST_TEST (ooT);
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BOOST_TEST (!*ooT);
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optional< optional<int> > ooF = make_optional(false, oi);
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BOOST_TEST (!ooF);
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}
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void test_nested_make_optional()
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{
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verify_type< optional< optional<int> > >(make_optional(make_optional(1)));
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verify_type< optional< optional<int> > >(make_optional(true, make_optional(true, 2)));
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optional< optional<int> > oo1 = make_optional(make_optional(1));
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BOOST_TEST (oo1);
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BOOST_TEST (*oo1);
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BOOST_TEST_EQ (1, **oo1);
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optional< optional<int> > oo2 = make_optional(true, make_optional(true, 2));
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BOOST_TEST (oo2);
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BOOST_TEST (*oo2);
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BOOST_TEST_EQ (2, **oo2);
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optional< optional<int> > oo3 = make_optional(true, make_optional(false, 3));
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BOOST_TEST (oo3);
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BOOST_TEST (!*oo3);
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optional< optional<int> > oo4 = make_optional(false, make_optional(true, 4));
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BOOST_TEST (!oo4);
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}
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int main()
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{
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#if (!defined BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES)
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test_make_optional_for_move_only_type();
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#endif
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test_make_optional_for_optional();
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test_nested_make_optional();
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return boost::report_errors();
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}
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