floats as bits print structure

fab.hpp

struct float_as_bits {

    float_as_bits ( const float & v_ ) : value { v_ } { };
    float_as_bits ( float && v_ ) : value { std::move ( v_ ) } { };

    template<typename Stream>
    [[ maybe_unused ]] friend Stream & operator << ( Stream & out_, const float_as_bits & v_ ) noexcept {
        std::uint32_t v;
        std::memcpy ( &v, &v_.value, 4 );
        int c = 0;
        std::uint32_t i = std::uint32_t { 1 } << 31;
        while ( i ) {
            putchar ( int ( ( v & i ) > 0 ) + int ( 48 ) );
            if ( 0 == c or 8 == c ) {
                putchar ( 32 );
            }
            i >>= 1;
            ++c;
        }
        return out_;
    }

    float value;
};