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// Copyright (c) 2010 Olaf Peter
// Copyright (c) 2001-2010 Hartmut Kaiser
//
// Distributed under 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)
#include <boost/spirit/include/karma.hpp>
#include <boost/core/lightweight_test.hpp>
namespace client
{
namespace karma = boost::spirit::karma;
template <typename OutputIterator>
struct grammar
: karma::grammar<OutputIterator, boost::optional<double>()>
{
grammar()
: grammar::base_type(start)
{
using karma::double_;
u = double_ << "U";
start = ( !double_ << "NA" ) | u;
start.name("start");
u.name("u");
}
karma::rule<OutputIterator, double()> u;
karma::rule<OutputIterator, boost::optional<double>()> start;
};
}
int main()
{
namespace karma = boost::spirit::karma;
typedef std::back_insert_iterator<std::string> sink_type;
boost::optional<double> d1, d2;
d2 = 1.0;
std::string generated1, generated2;
client::grammar<sink_type> g;
BOOST_TEST(karma::generate(sink_type(generated1), g, d1) && generated1 == "NA");
BOOST_TEST(karma::generate(sink_type(generated2), g, d2) && generated2 == "1.0U");
return boost::report_errors();
}
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