Multiplier.hh

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#pragma once
 
#include <iostream>
#include <variant>
#include <gmpxx.h>
 
namespace cadabra {
 
    class Multiplier {
        private:
            std::variant<mpq_class, double> value;
 
        public:
            // Constructors
            Multiplier();
            Multiplier(mpz_class numerator, mpz_class denominator=1);
            Multiplier(const mpq_class& v);
            Multiplier(int v);
            Multiplier(unsigned int v);
            Multiplier(long v);
            Multiplier(unsigned long v);
            Multiplier(double v);
    
            // Copy constructor
            Multiplier(const Multiplier& other) = default;
    
            // Assignment operators
            Multiplier& operator=(const Multiplier& other) = default;
            Multiplier& operator=(const mpq_class& v);
            Multiplier& operator=(const double& v);
    
            // Type checking
            bool is_rational() const;
            bool is_double() const;
    
            // Value getters
            const mpq_class& get_rational() const;
            double get_double() const;
    
            // Helper method to determine result type
            static bool result_is_double(const Multiplier& a, const Multiplier& b);
 
            // Canonicalize if rational.
            void canonicalize();
            
            // Arithmetic operators
            Multiplier operator+(const Multiplier& other) const;
            Multiplier operator-(const Multiplier& other) const;
            Multiplier operator*(const Multiplier& other) const;
            Multiplier operator/(const Multiplier& other) const;
    
            // Compound assignment operators
            Multiplier& operator+=(const Multiplier& other);
            Multiplier& operator-=(const Multiplier& other);
            Multiplier& operator*=(const Multiplier& other);
            Multiplier& operator/=(const Multiplier& other);
    
            // Comparison operators
            bool operator==(const Multiplier& other) const;
            bool operator!=(const Multiplier& other) const;
            bool operator<(const Multiplier& other) const;
            bool operator<=(const Multiplier& other) const;
            bool operator>(const Multiplier& other) const;
            bool operator>=(const Multiplier& other) const;
    
            // Stream output
            friend std::ostream& operator<<(std::ostream& os, const Multiplier& m);
    };
 
}