WeightInherit.hh

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#pragma once

#include "Exceptions.hh"
#include "properties/WeightBase.hh"

namespace cadabra {

    class WeightInherit : virtual public WeightBase {
        public:
            // The following exception class is thrown when 'value' cannot figure out the 
            // weight because a sum contains terms of different weight. 
            class WeightException : public ConsistencyException { 
                public:
                    WeightException(const std::string&);
            };
            
            virtual bool          parse(const Kernel&, keyval_t&) override;
            virtual multiplier_t  value(const Kernel&, Ex::iterator, const std::string& forcedlabel) const override;
            virtual std::string   unnamed_argument() const override { return "type"; };
            virtual std::string   name() const override;
            
            enum { multiplicative, additive, power } combination_type;
            
            multiplier_t value_self;
    };

}