Jarrad,
Thanks, I saw this a long time ago at codeproject also. Is there any real hope in the future that boost::any will take advantage of this implementation?
Only, if somebody cares to push it through the review process (writes documentation, etc.). Currently it's just an internal implementation detail in Spirit2.
This is related to my original question. While using hold_any, I run into this problem when trying to use BOOST_SPIRIT_DEBUG with a vector of hold_any.
binary '>>' : no operator found which takes a right-hand operand of type 'std::vector<_Ty>' (or there is no acceptable conversion) 1> with 1> [ 1> _Ty=boost::spirit::hold_any 1> ]
The code I added was as follows
std::istream& operator>> (std::istream& i, vector<hold_any>& obj) { return i;//obj.table->stream_in(i, &obj.object); }
std::ostream& operator<< (std::ostream& o, vector<hold_any> const& obj) { o << "["; for(size_t i = 0; i < obj.size(); i++) { if(i > 0) o << ","; o << obj[i]; } o << "]"; return o; }
Seems to be fine this way. Hold_any supports streaming only if the contained datatype is streamable. Regards Hartmut