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/*=============================================================================
Copyright (c) 2001-2015 Joel de Guzman
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/home/x3.hpp>
#include <boost/fusion/adapted/struct.hpp>
#include <boost/fusion/include/vector.hpp>
#include <iostream>
#include "test.hpp"
#include "utils.hpp"
#ifdef _MSC_VER
// bogus https://developercommunity.visualstudio.com/t/buggy-warning-c4709/471956
# pragma warning(disable: 4709) // comma operator within array index expression
#endif
struct adata
{
int a;
boost::optional<int> b;
};
BOOST_FUSION_ADAPT_STRUCT(adata,
a, b
)
struct test_attribute_type
{
template <typename Context>
void operator()(Context& ctx) const
{
BOOST_TEST(typeid(decltype(_attr(ctx))).name() == typeid(boost::optional<int>).name());
}
};
int
main()
{
using boost::spirit::x3::traits::is_optional;
static_assert(is_optional<boost::optional<int>>(), "is_optional problem");
using spirit_test::test;
using spirit_test::test_attr;
using boost::spirit::x3::int_;
using boost::spirit::x3::omit;
using boost::spirit::x3::ascii::char_;
BOOST_SPIRIT_ASSERT_CONSTEXPR_CTORS(-int_);
{
BOOST_TEST((test("1234", -int_)));
BOOST_TEST((test("abcd", -int_, false)));
boost::optional<int> n;
BOOST_TEST(test_attr("", -int_, n))
&& BOOST_TEST(!n);
BOOST_TEST(test_attr("123", -int_, n))
&& BOOST_TEST(n) && BOOST_TEST_EQ(*n, 123);
boost::optional<std::string> s;
BOOST_TEST(test_attr("", -+char_, s))
&& BOOST_TEST(!s);
BOOST_TEST(test_attr("abc", -+char_, s))
&& BOOST_TEST(s) && BOOST_TEST_EQ(*s, "abc");
}
{ // test propagation of unused
using boost::fusion::at_c;
using boost::fusion::vector;
vector<char, char> v;
BOOST_TEST((test_attr("a1234c", char_ >> -omit[int_] >> char_, v)));
BOOST_TEST((at_c<0>(v) == 'a'));
BOOST_TEST((at_c<1>(v) == 'c'));
v = boost::fusion::vector<char, char>();
BOOST_TEST((test_attr("a1234c", char_ >> omit[-int_] >> char_, v)));
BOOST_TEST((at_c<0>(v) == 'a'));
BOOST_TEST((at_c<1>(v) == 'c'));
char ch;
BOOST_TEST((test_attr(",c", -(',' >> char_), ch)));
BOOST_TEST((ch == 'c'));
}
{ // test action
boost::optional<int> n = 0;
BOOST_TEST((test_attr("1234", (-int_)[test_attribute_type()], n)));
BOOST_TEST((n.get() == 1234));
}
{
std::string s;
BOOST_TEST((test_attr("abc", char_ >> -(char_ >> char_), s)));
BOOST_TEST(s == "abc");
}
{
boost::optional<int> n = 0;
auto f = [&](auto& ctx){ n = _attr(ctx); };
BOOST_TEST((test("1234", (-int_)[f])));
BOOST_TEST(n.get() == 1234);
n = boost::optional<int>();
BOOST_TEST((test("abcd", (-int_)[f], false)));
BOOST_TEST(!n);
}
{
std::vector<adata> v;
BOOST_TEST((test_attr("a 1 2 a 2", *('a' >> int_ >> -int_), v
, char_(' '))));
BOOST_TEST(2 == v.size() &&
1 == v[0].a && v[0].b && 2 == *(v[0].b) &&
2 == v[1].a && !v[1].b);
}
{ // test move only types
boost::optional<move_only> o;
BOOST_TEST(test_attr("s", -synth_move_only, o));
BOOST_TEST(o);
}
return boost::report_errors();
}
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