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operator<<,>>(std::filesystem::path)

template< class CharT, class Traits >
std::basic_ostream<CharT,Traits>&
    operator<<( std::basic_ostream<CharT,Traits>& os, const path& p );
 (1) (since C++17) 
template< class CharT, class Traits >
std::basic_istream<CharT,Traits>&
    operator>>( std::basic_istream<CharT,Traits>& is, path& p );
 (2) (since C++17)

Performs stream input or output on the path p. std::quoted is used so that spaces are not truncation when later read by stream input operator.

Parameters

os - stream to perform output on
is - stream to perform input on
p - path to insert or extract

Return value

1) os
2) is

Exceptions

(none).

Possible implementation

First version 
template< class CharT, class Traits >
std::basic_ostream<CharT,Traits>&
    operator<<( std::basic_ostream<CharT,Traits>& os, const path& p )
{
    os << std::quoted(p.string<CharT,Traits>());
    return os;
}
Second version 
template< class CharT, class Traits >
std::basic_istream<CharT,Traits>&
    operator>>( std::basic_istream<CharT,Traits>& is, path& p )
{
    std::basic_string<CharT, Traits> t;
    is >> std::quoted(t);
    p = t;
    return is;
}

Example

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