Usted buscó: lookahead (Inglés - Coreano)

lookahead
룩어헤드

edge lookahead:
종류:

negative lookahead
부정 룩어헤드

bad lookahead syntax
잘못된 룩어헤드 문법qregexp

this may be a positive or negative lookahead orthis may be a positive or negative lookahead or lookbehind assertion.
a word boundary is a position in the subject string where the current character and the previous character do not both match \w or \w (i.e. one matches \w and the other matches \w), or the start or end of the string if the first or last character matches \w, respectively.