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// Copyright (C) 2018 T. Zachary Laine
//
// 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/parser/parser.hpp>
#include <boost/core/lightweight_test.hpp>
using namespace boost::parser;
auto make_13 = [](auto & context) { return 13; };
auto const first_param_to_val = [](auto & context) {
using namespace boost::parser::literals;
_val(context) = (int)get(_params(context), 0_c);
};
auto const second_param_to_val = [](auto & context) {
using namespace boost::parser::literals;
_val(context) = get(_params(context), 1_c);
};
constexpr rule<struct action_param_tag, int> action_param = "abc or def";
constexpr auto action_param_def =
string("abc")[first_param_to_val] | string("def")[second_param_to_val];
BOOST_PARSER_DEFINE_RULES(action_param);
int main()
{
{
std::string const str = "abc";
auto const result = parse(str, action_param.with(15.0, make_13));
BOOST_TEST(result);
BOOST_TEST(*result == 15);
}
{
std::string const str = "def";
auto const result = parse(str, action_param.with(15.0, make_13));
BOOST_TEST(result);
BOOST_TEST(*result == 13);
}
return boost::report_errors();
}
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