Regex to ignore commented lines C++ -

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I am trying to use regex to find all the variable initializations or assignments in the code. Currently I have 

  (\ w + | \ [_]) \ s * = \ s * (\ d + \. \ D + .. *)

which works but also comments like code like // a = 100; which I do not want to do I have tried 

  ([^ /] \ w + | \ [_]) \ s * = \ s * (\ d + \. \ D + .. *) `

Which I thought was to ignore strings which starts with / but it does not work.

Edit:

For example I want to find it like b = 200; but // c = 3;

I try to take it if necessary. 

  ^ (?!!! / / /). * [Az] [a-z0-9 \ _] * \ s * = \ s * [0-9] + ;

View the demo:


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