Re: [Boost-users] Possible Boost.Variant issue with JSON AST

11 Jan 2019

      On 1/10/19 5:36 PM, Michael Powell via Boost-users wrote:
...
On Thu, Jan 10, 2019 at 6:15 PM Gavin Lambert via Boost-users
 wrote:
...
On 11/01/2019 07:36, Michael Powell wrote:
...
Here's my attempt at a flattened single source example:
https://wandbox.org/permlink/83c3VXZ4W1DHoEBc
The problems in that code are that you're using completely the wrong types.
Fair observations. I've updated a bit, which I think is now tracking
with my local progress. Chiefly now, issues with "incompatible
skipper"?
https://wandbox.org/permlink/4spQR8yXweIcVfdB
Perhaps a repeated tuple issue of some sort? Otherwise, I'm not sure I
see what's going on there...
I'd also tried forward declared structs to capture Member, Object,
Array, etc, but this was running into Boost.Variant incomplete type
issues.
Try altering what's forward declared:

         struct member_t;

         using members_t = std::vector;

         // JSON_PARSER_OBJECT_HPP
         struct object_t {
             members_t members;
             object_t();
             object_t(const object_t& other);
             virtual ~object_t();
         };

         struct value_t
         : boost::variant
           < null_t, boolean_t, str_t
           , floating_point_number_t
           , integer_number_t, object_t, array_t
           >
           {...};

That way, since sizeof(vector<anything>) is known,  sizeof(object_t) is
known.

HTH.

-regards,
Larry

Re: [Boost-users] Possible Boost.Variant issue with JSON AST

Larry Evans