id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
5566	Spirit.Lex converting a token to its value in a lexer semantic action fails	Reko Tiira <reko@…>	Hartmut Kaiser	"Discussed this on #boost with heller and he said to post a bug report about the issue. Here's a test case that should apparently work fine: 

{{{
#include <string>
#include <vector>
#include <boost/spirit/include/lex_lexertl.hpp>
#include <boost/spirit/include/phoenix_core.hpp>
#include <boost/spirit/include/phoenix_stl.hpp>

namespace lex = boost::spirit::lex;

template <typename Lexer>
struct text_decorator_lexer : lex::lexer<Lexer>
{
        text_decorator_lexer()
                : tag_open(""\\{\\{.+?\\}\\}"")
                , tag_close(""\\{\\{\\/.+?\\}\\}"")
                , var(""\\$\\$.+?\\$\\$"")
                , any(""."")
        {
                using boost::spirit::lex::_val;
                using boost::phoenix::push_back;
                using boost::phoenix::ref;

                this->self
                        = tag_open  [push_back(ref(tokens), _val)]
                        | tag_close [push_back(ref(tokens), _val)]
                        | var       [push_back(ref(tokens), _val)]
                        | any       [push_back(ref(tokens), _val)]
                        ;
        }

        std::vector<std::string> tokens;
        lex::token_def<std::string> tag_open, tag_close, var, any;
};

int main()
{
        typedef lex::lexertl::token<const char*, boost::mpl::vector<std::string>, boost::mpl::false_> token_type;
        typedef lex::lexertl::actor_lexer<token_type> lexer_type;

        text_decorator_lexer<lexer_type> text_decorator_tokenizer;
        std::string input = ""Hello {{b}}there{{/b}}, the time is $$time$$."";

        char const* first = input.c_str();
        char const* last = &first[input.size()];
        lex::tokenize(first, last, text_decorator_tokenizer);
}
}}}

And the relevant part of the error is:

{{{
/opt/local/include/boost/spirit/home/phoenix/stl/container/container.hpp:492:40: error: no matching function for call to 'std::vector<std::basic_string<char> >::push_back(const boost::variant<boost::detail::variant::over_sequence<boost::mpl::v_item<boost::iterator_range<const char*>, boost::mpl::v_item<std::basic_string<char>, boost::mpl::vector0<mpl_::na>, 1>, 1> >, boost::detail::variant::void_, boost::detail::variant::void_, boost::detail::variant::void_, boost::detail::variant::void_, boost::detail::variant::void_, boost::detail::variant::void_, boost::detail::variant::void_, boost::detail::variant::void_, boost::detail::variant::void_, boost::detail::variant::void_, boost::detail::variant::void_, boost::detail::variant::void_, boost::detail::variant::void_, boost::detail::variant::void_, boost::detail::variant::void_, boost::detail::variant::void_, boost::detail::variant::void_, boost::detail::variant::void_, boost::detail::variant::void_>&)'
/opt/local/include/boost/spirit/home/phoenix/stl/container/container.hpp:492:40: note: candidate is:
/opt/local/include/gcc46/c++/bits/stl_vector.h:826:7: note: void std::vector<_Tp, _Alloc>::push_back(const value_type&) [with _Tp = std::basic_string<char>, _Alloc = std::allocator<std::basic_string<char> >, std::vector<_Tp, _Alloc>::value_type = std::basic_string<char>]
/opt/local/include/gcc46/c++/bits/stl_vector.h:826:7: note:   no known conversion for argument 1 from 'const boost::variant<boost::detail::variant::over_sequence<boost::mpl::v_item<boost::iterator_range<const char*>, boost::mpl::v_item<std::basic_string<char>, boost::mpl::vector0<mpl_::na>, 1>, 1> >, boost::detail::variant::void_, boost::detail::variant::void_, boost::detail::variant::void_, boost::detail::variant::void_, boost::detail::variant::void_, boost::detail::variant::void_, boost::detail::variant::void_, boost::detail::variant::void_, boost::detail::variant::void_, boost::detail::variant::void_, boost::detail::variant::void_, boost::detail::variant::void_, boost::detail::variant::void_, boost::detail::variant::void_, boost::detail::variant::void_, boost::detail::variant::void_, boost::detail::variant::void_, boost::detail::variant::void_, boost::detail::variant::void_>' to 'const value_type&'
/opt/local/include/boost/spirit/home/phoenix/stl/container/container.hpp:492:40: error: return-statement with a value, in function returning 'void' [-fpermissive]
}}}

Tested with:

gcc version 4.6.1 20110325 (prerelease) (GCC) 
gcc version 4.2.1 (Apple Inc. build 5666) (dot 3)"	Bugs	closed	To Be Determined	spirit	Boost 1.46.1	Problem	fixed