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This function failed to compile when called with a std::string. Also, constructing a path with a char8_t string did not correctly treat the string as already UTF-8 encoded. * include/bits/fs_path.h (u8path(InputIterator, InputIterator)) (u8path(const Source&)) [_GLIBCXX_FILESYSTEM_IS_WINDOWS]: Simplify conditions. * include/experimental/bits/fs_path.h [_GLIBCXX_FILESYSTEM_IS_WINDOWS] (__u8path(const Source&, char)): Add overloads for std::string and types convertible to std::string. (_Cvt::_S_wconvert): Add a new overload for char8_t strings and use codecvt_utf8_utf16 to do the correct conversion. From-SVN: r278869
file: libstdc++-v3/README New users may wish to point their web browsers to the file index.html in the 'doc/html' subdirectory. It contains brief building instructions and notes on how to configure the library in interesting ways.