REGEX to catch whitespace or comments -

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i'm trying create regex catch whitespace or comments (//). content of comment unknown (can contain character). want allow character only after comment, otherwise - whitespace. run regex on string contains new-lines. suggestions?

example:

whitespace // unknown comment 123@#$~ whitespace whitespace // comment whitespace

if ones mentioned want capture, use : (\s*)(//(.*))*


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