Unmatch complete words if a negative lookahead is satisfied

Question

I need to match only those words which doesn\'t have special characters like @ and :. For example:

1. git@github.com shouldn\'t

Answer 1

You can use negative lookbehind and negative lookahead patterns around a word pattern to make sure that the word is not preceded or followed by a non-space character, or in other words, to make sure that it is surrounded by either a space or a string boundary:

(?

Demo: https://regex101.com/r/cjhUUM/2