如果在匹配项中找到某个字符串，则使正则表达式不匹配？

Question

Lets say i have some random easy match like

\bword\b

Now i want to add to this that if before this match there is lets say this

(HOUSE[ ]*?)\bword\b

So if the word HOUSE and whatever ammount of spaces is infront of word then the match should be false. So my question more or less is how do i negate the (HOUSE[ ]*?) query?

Answer 1

You use a negative lookbehind. In .NET lookbehinds can be variable length:

(?<!HOUSE[ ]*?)\bword\b

Reference :

• Variable length lookbehind