+EinR |bool |isGCB |const GCB_enum before|const GCB_enum after
+EsR |bool |isLB |LB_enum before \
+ |LB_enum after \
+ |NN const U8 * const strbeg \
+ |NN const U8 * const curpos \
+ |NN const U8 * const strend \
+ |const bool utf8_target
+EsR |LB_enum|advance_one_LB |NN U8 ** curpos \
+ |NN const U8 * const strend \
+ |const bool utf8_target
+EsR |LB_enum|backup_one_LB |NN const U8 * const strbeg \
+ |NN U8 ** curpos \
+ |const bool utf8_target
+EsR |bool |isSB |SB_enum before \
+ |SB_enum after \
+ |NN const U8 * const strbeg \
+ |NN const U8 * const curpos \
+ |NN const U8 * const strend \
+ |const bool utf8_target
+EsR |SB_enum|advance_one_SB |NN U8 ** curpos \
+ |NN const U8 * const strend \
+ |const bool utf8_target
+EsR |SB_enum|backup_one_SB |NN const U8 * const strbeg \
+ |NN U8 ** curpos \
+ |const bool utf8_target
+EsR |bool |isWB |WB_enum previous \
+ |WB_enum before \
+ |WB_enum after \
+ |NN const U8 * const strbeg \
+ |NN const U8 * const curpos \
+ |NN const U8 * const strend \
+ |const bool utf8_target
+EsR |WB_enum|advance_one_WB |NN U8 ** curpos \
+ |NN const U8 * const strend \
+ |const bool utf8_target \
+ |const bool skip_Extend_Format
+EsR |WB_enum|backup_one_WB |NN WB_enum * previous \
+ |NN const U8 * const strbeg \
+ |NN U8 ** curpos \
+ |const bool utf8_target