PairwiseForceSource.h

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#pragma once
 
#include <iostream>
 
#include "particles/Particle.h"
 
class PairwiseForceSource {
   public:
    virtual ~PairwiseForceSource() = default;
 
    virtual std::array<double, 3UL> calculateForce(const Particle& p, const Particle& q) const = 0;
 
    virtual explicit operator std::string() const = 0;
};
 
// overload the << operator for the PairwiseForceSource class to allow easier printing
inline std::ostream& operator<<(std::ostream& os, const PairwiseForceSource& PairwiseForceSource) {
    os << static_cast<std::string>(PairwiseForceSource);
    return os;
}