Program Listing for File fwd_functional.hpp

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#ifndef _FWD_FUNCTIONAL_HPP_
#define _FWD_FUNCTIONAL_HPP_

#include <cmath>
#include <limits>
#include <functional>
#include <algorithm> //for std::min/max
#include <gsl/gsl_rng.h>
#include <gsl/gsl_randist.h>

namespace fwdpp
{
    struct equal_eps
    {
        using result_type = bool;
        template <typename T>
        inline bool
        operator()(const T &lhs, const T &rhs) const
        {
            return (std::max(lhs, rhs) - std::min(lhs, rhs)
                    <= std::numeric_limits<T>::epsilon());
        }
    };

    /* \brief Policy telling library not to remove any mutations from haploid_genomes
       after sampling
       \note This is an empty struct that functions as a dispatch tag for
       library internals
     */
    struct remove_nothing
    {
    };

    struct remove_neutral
    {
        template <typename mtype>
        inline bool
        operator()(const mtype &m) const
        {
            return m.neutral;
        }
    };
} // namespace fwdpp
#endif /* _FWD_FUNCTIONAL_HPP_ */