-EXpR |bool |is_utf8_X_begin |NN const U8 *p
-EXpR |bool |is_utf8_X_extend |NN const U8 *p
-EXpR |bool |is_utf8_X_prepend |NN const U8 *p
-EXpR |bool |is_utf8_X_non_hangul |NN const U8 *p
-EXpR |bool |is_utf8_X_L |NN const U8 *p
-EXpR |bool |is_utf8_X_LV |NN const U8 *p
-EXpR |bool |is_utf8_X_LVT |NN const U8 *p
-EXpR |bool |is_utf8_X_LV_LVT_V |NN const U8 *p
-EXpR |bool |is_utf8_X_T |NN const U8 *p
-EXpR |bool |is_utf8_X_V |NN const U8 *p