Clash Royale CLAN TAG

Regex - How to capture all iterations of a repeating pattern?

Take a look at this example, I want to capture not just the last iteration (which is 5), but also 2, 3 and 4. It says here:

A repeated capturing group will only capture the last iteration. Put a capturing group around the repeated group to capture all iterations...

but I don't know how to do this. Since I need this in C++, I was looking for a way to get all iterations of capturing group using some regex functions in C++, but I always end up with same groups which the website finds.

instruction d((,d)*)

,2,3,4,5

,5

1 Answer
1

If you're only interested in the numbers, you can use a positive Lookbehind combined with G to match each individual number. Something like this should work:

G

(?<=instructions|(?!^)G,)d


Explanation of the regex:

(?<= # Start of a positive Lookbehind.
instruction # Matches the word 'instruction' literally.
s # Matches a whitespace.
| # Alternation (OR).
(?! # Start of a negative Lookahead.
^ # Asserts position at the beginning of the string.
) # End of the negative Lookahead.
G # Asserts position at the end of the previous match.
, # Matches the character ',' literally.
) # End of the positive Lookbehind.
d # Matches a digit character.


Here's a demo.

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