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## Macro BOOST_PFR_FUNCTIONS_FOR

BOOST_PFR_FUNCTIONS_FOR

## Synopsis

    // In header: <boost/pfr/functions_for.hpp>

    BOOST_PFR_FUNCTIONS_FOR(T)

## Description

Defines comparison and stream operators for T along with hash_value function.

Example:

    #include <boost/pfr/functions_for.hpp>
    struct comparable_struct {      // No operators defined for that structure
        int i; short s; char data[7]; bool bl; int a,b,c,d,e,f;
    };
    BOOST_PFR_FUNCTIONS_FOR(comparable_struct)
    // ...

    comparable_struct s1 {0, 1, "Hello", false, 6,7,8,9,10,11};
    comparable_struct s2 {0, 1, "Hello", false, 6,7,8,9,10,11111};
    assert(s1 < s2);
    std::cout << s1 << std::endl; // Outputs: {0, 1, H, e, l, l, o, , , 0, 6, 7, 8, 9, 10, 11}

See Also : 'Three ways of getting operators' for other ways to define operators and more details.

Defines following for T:

    bool operator==(const T& lhs, const T& rhs);
    bool operator!=(const T& lhs, const T& rhs);
    bool operator< (const T& lhs, const T& rhs);
    bool operator> (const T& lhs, const T& rhs);
    bool operator<=(const T& lhs, const T& rhs);
    bool operator>=(const T& lhs, const T& rhs);

    template <class Char, class Traits>
    std::basic_ostream<Char, Traits>& operator<<(std::basic_ostream<Char, Traits>& out, const T& value);

    template <class Char, class Traits>
    std::basic_istream<Char, Traits>& operator>>(std::basic_istream<Char, Traits>& in, T& value);

    // helper function for Boost unordered containers and boost::hash<>.
    std::size_t hash_value(const T& value);