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std::filesystem::path::generic_string, std::filesystem::path::generic_wstring, std::filesystem::path::generic_u8string, std::filesystem::path::generic_u16string, std::filesystem::path::generic_u32string

template< class CharT, class Traits = std::char_traits<CharT>, class Alloc = std::allocator<CharT> > std::basic_string<CharT,Traits,Alloc> generic_string( const Alloc& a = Alloc() ) const;	(1)	(since C++17)
	(2)	(since C++17)
std::string generic_string() const;
std::wstring generic_wstring() const;
std::u16string generic_u16string() const;
std::u32string generic_u32string() const;
	(3)
std::string generic_u8string() const;		(since C++17) (until C++20)
std::u8string generic_u8string() const;		(since C++20)

Returns the internal pathname in generic pathname format, converted to specific string type. Conversion, if any, is specified as follows:

If path::value_type is char, conversion, if any, is system-dependent. This is the case on typical POSIX systems (such as Linux), where native encoding is UTF-8 and string() performs no conversion.
Otherwise, if path::value_type is wchar_t, conversion, if any, is unspecified. This is the case on Windows, where wchar_t is 16 bit and the native encoding is UTF-16.
Otherwise, if path::value_type is char16_t, native encoding is UTF-16 and the conversion method is unspecified.
Otherwise, if path::value_type is char32_t, native encoding is UTF-32 and the conversion method is unspecified.
Otherwise, if path::value_type is char8_t, native encoding is UTF-8 and the conversion method is unspecified.

The / character is used as the directory separator.

1) All memory allocations are performed by a.

3) The result encoding in the case of u8string() is always UTF-8.

a	-	allocator to construct the string with
Type requirements
-`CharT` must be one of the encoded character types (`char`, `wchar_t`, `char16_t` and `char32_t`)

The internal pathname in generic pathname format, converted to specified string type.

(none).