X3: How to parse "text" | "texture" into variant<text, texture> ?

Hi,

some code here:

#include <boost/spirit/home/x3.hpp>
#include <boost/variant.hpp>
#include <boost/fusion/include/adapt_struct.hpp>
#include <string>
#include <iostream>

namespace x3 = boost::spirit::x3;

struct text_t {};
struct texture_t {};
typedef boost::variant<text_t, texture_t> object_t;
typedef std::string::const_iterator iterator;

BOOST_FUSION_ADAPT_STRUCT(text_t);
BOOST_FUSION_ADAPT_STRUCT(texture_t);

const x3::rule<class object_rule, object_t> object_rule("object");
const x3::rule<class text_rule, text_t> text_rule("text");
const x3::rule<class texture_rule, texture_t> texture_rule("texture");

const auto object_rule_def = text_rule | texture_rule;
const auto text_rule_def = x3::lit("text") > x3::lit('{') > x3::lit('}');
const auto texture_rule_def = x3::lit("texture") > x3::lit('{') >
x3::lit('}');

BOOST_SPIRIT_DEFINE(object_rule, text_rule, texture_rule);

int main()
{
	const std::string text("text {}");
	const std::string texture("texture {}");
	object_t object;
	try
	{
		x3::phrase_parse(text.begin(), text.end(), object_rule, x3::space,
object); // OK
		x3::phrase_parse(texture.begin(), texture.end(), object_rule, x3::space,
object); // Failure
	}
	catch (const x3::expectation_failure<iterator>& failure)
	{
		std::cout << failure.what() << " : " << failure.which() << " : " <<
*failure.where() << std::endl;
	}
}

So how can I parse "text" | "texture" into the object variant?

Thanks,
Mike...




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