-#define NTL_ALNUM 0x0001 /* (NTL_ALPHA | NTL_DIGIT) */
-#define NTL_ALPHA 0x0002 /* (NTL_LOWER | NTL_UPPER) */
-#define NTL_CNTRL 0x0004 /* \000 - \037 == 0x00 - 0x1F */
-#define NTL_DIGIT 0x0008 /* 0123456789 */
-#define NTL_GRAPH 0x0010 /* (NTL_ALNUM | NTL_PUNCT) */
-#define NTL_LOWER 0x0020 /* abcdefghijklmnopqrstuvwxyz{|}~ */
-#define NTL_PRINT 0x0040 /* (NTL_GRAPH | ' ') */
-#define NTL_PUNCT 0x0080 /* !"#$%&'()*+,-./:;<=>?@_` */
-#define NTL_SPACE 0x0100 /* \011\012\013\014\015\040 */
-#define NTL_UPPER 0x0200 /* ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^ */
-#define NTL_IRCCH 0x0400 /* Channel's names charset */
-#define NTL_IRCCL 0x0800 /* Force toLower() in ch-name */
-#define NTL_IRCNK 0x1000 /* Nick names charset, aka isvalid() */
-#define NTL_IRCUI 0x2000 /* UserIDs charset, IRCHN plus tilde */
-#define NTL_IRCHN 0x4000 /* Hostnames charset (weak, RFC 1033) */
-#define NTL_IRCIP 0x8000 /* Numeric IPs charset (DIGIT and .) */
-#define NTL_EOL 0x10000 /* \r\n */
-#define NTL_KTIME 0x20000 /* Valid character for a k:line time */
-#define NTL_CHPFX 0x40000 /* channel prefix char # & + */
-#define NTL_IRCIP6 0x80000 /* Numeric IPv6 character (hex or colon) */
+#define NTL_ALNUM 0x0001 /**< (NTL_ALPHA | NTL_DIGIT) */
+#define NTL_ALPHA 0x0002 /**< (NTL_LOWER | NTL_UPPER) */
+#define NTL_CNTRL 0x0004 /**< \\000 - \\037 == 0x00 - 0x1F */
+#define NTL_DIGIT 0x0008 /**< 0123456789 */
+#define NTL_GRAPH 0x0010 /**< (NTL_ALNUM | NTL_PUNCT) */
+#define NTL_LOWER 0x0020 /**< abcdefghijklmnopqrstuvwxyz{|}~ */
+#define NTL_PRINT 0x0040 /**< (NTL_GRAPH | ' ') */
+#define NTL_PUNCT 0x0080 /**< !"#$%&'()*+,-./:;<=>?\@_` */
+#define NTL_SPACE 0x0100 /**< \\011\\012\\013\\014\\015\\040 */
+#define NTL_UPPER 0x0200 /**< ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^ */
+#define NTL_IRCCH 0x0400 /**< Channel's names charset */
+#define NTL_IRCCL 0x0800 /**< Force toLower() in ch-name */
+#define NTL_IRCNK 0x1000 /**< Nick names charset, aka isvalid() */
+#define NTL_IRCUI 0x2000 /**< UserIDs charset, IRCHN plus tilde */
+#define NTL_IRCHN 0x4000 /**< Hostnames charset (weak, RFC 1033) */
+#define NTL_IRCIP 0x8000 /**< Numeric IPs charset (DIGIT and .) */
+#define NTL_EOL 0x10000 /**< \\r\\n */
+#define NTL_KTIME 0x20000 /**< Valid character for a k:line time */
+#define NTL_CHPFX 0x40000 /**< channel prefix char # & + */
+#define NTL_IRCIP6 0x80000 /**< Numeric IPv6 character (hex or colon) */