Re: boost and stl problem - std::string

Hi Jens,

On 07/10/2016 10:07 PM, Jens Kallup wrote:
> Hello,
>
> I want to use ExprNode to store AST informations.
> But I fail.
> How can I overgive parameters to class ExprNode?
>
> Here are the code sippets:
>
> template <typename TN>
> class ExprNode
> {
> public:
>      struct ExprNode *operand1;
>      struct ExprNode *operand2;
>
>      char opr;
>      int  num;
>
>      ExprNode(char op, struct ExprNode *e1, struct ExprNode *e2)
>      {
>          opr = op;
>          operand1 = e1;
>          operand2 = e2;
>      }
>
>      ExprNode(int n)
>      {
>          num = n;
>          operand1 = operand2 = nullptr;
>      }
>
>      ExprNode() { }
>
>      template<TN>
>      ExprNode(TN t, std::string *p1, std::string *p2)
>      {
>          if (t == 2)
>          {
>              std::cout << "classler" << endl;
>          }
>      }
> };
>
>          class_definition
>              = (tok.kw_class          >> *comments
>                  >> tok.identifier    >> *comments
>                  >> tok.kw_of         >> *comments
>                  >> tok.identifier    >> *comments >> class_body
>                  >> tok.kw_endclass)
> /* line: 181 */ [
>                      ExprNode<int>(
>                      2,
>                      phx::construct<std::string>(_1),
>                      phx::construct<std::string>(_2))
>
>                      //expnode->add(2,"val(_1)","val(_2)")
>                      //phx::construct<std::string>(_1),
>                      //phx::construct<std::string>(_2))
>                  ]
>              ;
>
> /home/bak/src/ui/dbase/dBase/src/compiler/source/parser/yymain.cc:181:
> Fehler: no matching function for call to 'ExprNode<int>::ExprNode(int,
> boost::phoenix::actor<boost::phoenix::composite<boost::phoenix::detail::construct_eval<std::__cxx11::basic_string<char>
>  >, boost::fusion::vector<boost::spirit::argument<0>,
> boost::fusion::void_, boost::fusion::void_, boost::fusion::void_,
> boost::fusion::void_, boost::fusion::void_, boost::fusion::void_,
> boost::fusion::void_, boost::fusion::void_, boost::fusion::void_> > >,
> boost::phoenix::actor<boost::phoenix::composite<boost::phoenix::detail::construct_eval<std::__cxx11::basic_string<char>
>  >, boost::fusion::vector<boost::spirit::argument<1>,
> boost::fusion::void_, boost::fusion::void_, boost::fusion::void_,
> boost::fusion::void_, boost::fusion::void_, boost::fusion::void_,
> boost::fusion::void_, boost::fusion::void_, boost::fusion::void_> > >)'
>                   [
>                   ^

have you tried wrapping the ExprNode<int> constructor in a 
phx::construct call?
  From to code you provided I wonder what you want to do with the 
constructed object? If this is an attributed grammar, you could also try 
to provide a customization point to facilitate the construction of the 
attribute.
If you could provide a self contained compilable example it would be 
easier to judge.

Cheers
	Philipp



> Thanks for helping
>
> Jens
>
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