xfmt1.h

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#pragma once

#include <algorithm>
#include <forward_list>
#include <functional>
#include <ostream>

namespace nmx {

template<typename T>
class Fmt
{
private:
    std::forward_list<const T *> _items;
    const std::string _sep = ",", _lend = "\n";

public:
    Fmt() {}

    template<class... Y>
    Fmt(const Y &... y)
        : _items{ &y... } {}

    friend std::ostream &operator<<(std::ostream &os, Fmt<T> fmt) {
        for (const auto *p : fmt._items) {
            p->save(os);
        }
        return os;
    }
};

} // namespace nmx