namespace x3 = boost::spirit::x3;
using namespace spirit_test;
+ BOOST_SPIRIT_ASSERT_CONSTEXPR_CTORS(x3::confix('(', ')'));
+ BOOST_SPIRIT_ASSERT_CONSTEXPR_CTORS(x3::confix("[", "]"));
+ BOOST_SPIRIT_ASSERT_CONSTEXPR_CTORS(x3::confix("/*", "*/"));
+
{
const auto comment = x3::confix("/*", "*/");