Re: [Boost-users] Problems compiling Serialisation libs because o f Spirit problem

30 Mar 2006

      James Hughes wrote:
...
Some more information on this...
Looking at the headers that give the error, there appears to be an issue
with the result types returned from parsers....
boost/spirit/core/parser.hpp
template <typename DerivedT>
    struct parser
    {
        typedef DerivedT                embed_t;
        typedef DerivedT                derived_t;
        typedef plain_parser_category   parser_category_t;
template <typename ScannerT>
        struct result
        {
            typedef typename match_result::type type;
        };
boost/spirit/core/primitives/numerics.hpp
struct sign_parser : public parser
    {
        typedef sign_parser self_t;
template <typename ScannerT>
        struct result 
        {
            typedef typename match_result::type type;
        };
The derived sign_parser class appears to want to 'override' the base class
struct result, but instead the compiler is giving an error. This would
appear to be a compiler fault, but I could be way off there - depends
whether this compiles in other circumstances!! I am still at loss to fix
this so all help gratefully received!
The spirit list is the proper venue for spirit related questions.
spirit-general@lists.sourceforge.net.

Anyway... I am not sure what the workaround is here. I do not
have access to g++3.4.3. We've tested against all versions of
g++ (including 2.95.3 for Spirit 1.6.x) and I don't recall
any problems. I am currently testing against 3.4.4 and I see
no problems. Do you have a minimal cpp test file I can try?
Perhaps posting the compiler errors might help.

Regards,
-- 
Joel de Guzman
http://www.boost-consulting.com
http://spirit.sf.net