Introduce fsyspath subclass of std::filesystem::path.

Our std::strings are UTF-8 encoded, so conversion from std::string to
std::filesystem::path must use UTF-8 decoding. The native Windows
std::filesystem::path constructor and assignment operator accepting
std::string use "native narrow encoding," which mangles path strings
containing UTF-8 encoded non-ASCII characters.

fsyspath's std::string constructor and assignment operator explicitly engage
std::filesystem::u8path() to handle encoding. u8path() is deprecated in C++20,
but once we adapt fsyspath's conversion to C++20 conventions, consuming code
need not be modified.

(cherry picked from commit e399b02e3306a249cb161f07cac578d3f2617bab)

0 files changed, 0 insertions, 0 deletions