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// Copyright (C) 2003, Fernando Luis Cacciola Carballal.
// Copyright (C) 2014 Andrzej Krzemienski.
//
// Use, modification, and distribution is subject to the Boost Software
// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//
// See http://www.boost.org/lib/optional for documentation.
//
// You are welcome to contact the author at:
// fernando_cacciola@hotmail.com
#include <sstream>
#include "boost/optional/optional.hpp"
#include "boost/optional/optional_io.hpp"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#include "boost/core/lightweight_test.hpp"
using boost::optional;
template<class Opt>
void test2( Opt o, Opt buff )
{
std::stringstream s ;
const int markv = 123 ;
int mark = 0 ;
s << o << " " << markv ;
s >> buff >> mark ;
BOOST_TEST( buff == o ) ;
BOOST_TEST( mark == markv ) ;
}
template<class T>
void test( T v, T w )
{
test2( boost::make_optional(v), optional<T> ());
test2( boost::make_optional(v), boost::make_optional(w));
test2( optional<T> () , optional<T> ());
test2( optional<T> () , boost::make_optional(w));
}
template <class T>
void subtest_tag_none_reversibility_with_optional(optional<T> ov)
{
std::stringstream s;
s << boost::none;
s >> ov;
BOOST_TEST(!ov);
}
template <class T>
void subtest_tag_none_equivalence_with_optional()
{
std::stringstream s, r;
optional<T> ov;
s << boost::none;
r << ov;
BOOST_TEST_EQ(s.str(), r.str());
}
template <class T>
void test_tag_none(T v)
{
subtest_tag_none_reversibility_with_optional(optional<T>(v));
subtest_tag_none_reversibility_with_optional(optional<T>());
subtest_tag_none_equivalence_with_optional<T>();
}
int main()
{
test(1,2);
test(std::string("hello"), std::string("buffer"));
test_tag_none(10);
test_tag_none(std::string("text"));
return boost::report_errors();
}
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