c++ - How to emulate a negative lookbehind assertions in Qt regexp? -

c++ - How to emulate a negative lookbehind assertions in Qt regexp? -

I am writing a program using Qt 4.6 and I can write all the non-Range records from expressions like Need to catch i "SM (A1: A3) + B1-B3 + SM (D1: D3) / COUNT (D1: D3)", , i.e. B1, B3 , But A1, A3, D1, D3 I have tried to use QRegExp, but it does not support the support of negative perspective, so I can not literally remove it like A3, D3 Received. My regexp (? & Lt; !!) ([AZ] {1,4} [1- 9] \\ d {0,3}) (?!?) does not work for me Need input thanks.

  In your case you can use  
 (?: ^ | [ ^]] \ B ([AZ] {1,4} [1- 9] \ d {0}} \ b (?! :)   The first group matches the empty string to the colon Leaving the beginning or any character I have also added the  word limitations   \ b  so that the pattern will not match things like  A4a .  
 Often it is easy to type "positive" patterns, for example, with  ...   
 (...) (... ...)? < / Pre>  using your  [A] Z]  Pattern to match the cell reference, you can match the boundaries and non-categories in one pass, then leave all the categories while looping on the results. You can easily find out Whether the second capture group is empty or not, a series is a limit by examining it.

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