88 lines
1.8 KiB
C++
88 lines
1.8 KiB
C++
// Copyright (C) 2003, Fernando Luis Cacciola Carballal.
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// Copyright (C) 2014 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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// fernando_cacciola@hotmail.com
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#include <sstream>
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#include "boost/optional/optional.hpp"
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#include "boost/optional/optional_io.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/lightweight_test.hpp"
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using boost::optional;
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template<class Opt>
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void test2( Opt o, Opt buff )
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{
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std::stringstream s ;
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const int markv = 123 ;
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int mark = 0 ;
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s << o << " " << markv ;
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s >> buff >> mark ;
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BOOST_TEST( buff == o ) ;
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BOOST_TEST( mark == markv ) ;
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}
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template<class T>
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void test( T v, T w )
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{
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test2( boost::make_optional(v), optional<T> ());
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test2( boost::make_optional(v), boost::make_optional(w));
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test2( optional<T> () , optional<T> ());
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test2( optional<T> () , boost::make_optional(w));
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}
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template <class T>
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void subtest_tag_none_reversibility_with_optional(optional<T> ov)
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{
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std::stringstream s;
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s << boost::none;
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s >> ov;
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BOOST_TEST(!ov);
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}
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template <class T>
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void subtest_tag_none_equivalence_with_optional()
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{
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std::stringstream s, r;
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optional<T> ov;
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s << boost::none;
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r << ov;
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BOOST_TEST_EQ(s.str(), r.str());
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}
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template <class T>
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void test_tag_none(T v)
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{
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subtest_tag_none_reversibility_with_optional(optional<T>(v));
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subtest_tag_none_reversibility_with_optional(optional<T>());
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subtest_tag_none_equivalence_with_optional<T>();
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}
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int main()
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{
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test(1,2);
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test(std::string("hello"), std::string("buffer"));
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test_tag_none(10);
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test_tag_none(std::string("text"));
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return boost::report_errors();
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}
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