Function ParentPath

Siv3D/src/Siv3D/FileSystem/SivFileSystem.cpp:102–106

		}

		FilePath ParentPath(const FilePathView path, const size_t level)
		{
			FilePath unused;
			return ParentPath(path, level, unused);
		}

		FilePath ParentPath(const FilePathView path, size_t level, FilePath& baseFullPath)
		{