194     const size_t myLen = size();  in append()  local
196     if (myLen == 0) return setTo(chrs, otherLen);  in append()
200     size_t size = myLen;  in append()
209     memcpy(str + myLen, chrs, otherLen * sizeof(char16_t));  in append()
210     str[myLen + otherLen] = 0;  in append()
220     const size_t myLen = size();  in insert()  local
222     if (myLen == 0) return setTo(chrs, otherLen);  in insert()
226     if (pos > myLen) pos = myLen;  in insert()
228     size_t size = myLen;  in insert()
237     if (pos < myLen) memmove(str + pos + otherLen, str + pos, (myLen - pos) * sizeof(char16_t));  in insert()
239     str[myLen + otherLen] = 0;  in insert()