DisplayBase.hh

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#pragma once
 
#include <string>
#include <sstream>
#include "Props.hh"
#include "Storage.hh"
 
namespace cadabra {

 
    class DisplayBase {
        public:
            DisplayBase(const Kernel&, const Ex&);
 
            void output(std::ostream&);
            void output(std::ostream&, Ex::iterator);
 
            virtual void dispatch(std::ostream&, Ex::iterator)=0;
 
        protected:
 
            virtual bool needs_brackets(Ex::iterator it)=0;
 
            const Ex&     tree;
            const Kernel& kernel;
 
        };
 
    template <typename DisplayType> std::string ex_to_string(const Kernel& kernel, const Ex& ex)
    {
        std::ostringstream ss;
        DisplayType dt(kernel, ex);
        dt.output(ss);
        return ss.str();
    }
 
    template <typename DisplayType> std::string ex_to_string(const Kernel& kernel, Ex::iterator it)
    {
        return ex_to_string<DisplayType>(kernel, Ex(it));
    }
 
 
    }