Simplified example: consider the string aabaabaabaabaacbaabaabaabaa

I want to match all aa occurrences only after the c in the middle, using one regex expression.

The closest I've come to is c.*\Kaa but it only matches the last aa, and only the first aa with the ungreedy flag.

I'm using the regex101 website for testing.

CodePudding user response：

You can use

(?:\G(?!^)|c).*?\Kaa

See the regex demo. Details:

• (?:\G(?!^)|c) - either the end of the previous successful match (\G(?!^)) or (|) a c char
• .*? - any zero or more chars other than line break chars, as few as possible
• \K - forget the text matched so far
• aa - an aa string.