@MarekR22: Could you explain why a while(1) should be better than a check of the end of the buffer/file/whatever?

But another idea:

Qt Code: 
  1. // base class
  2. struct Matcher {
  3.   virtual bool matches(line);
  4.   virtual void doStuff();
  5. }
  6.  
  7. // impl
  8. struct Matcher1 : public Matcher {...}
  9. struct Matcher2 : public Matcher {...}
  10.  
  11. // algorithm
  12. // 1.) make a list of the matcher
  13.  
  14. foreach(const QString& line, lines) {
  15.  
  16.   foreach(Matcher* matcher, list_of_matchers) {
  17.  
  18.     if(matcher->matches(line)) {
  19.       matcher->doStuff();
  20.       break;
  21.     }
  22.   }
  23.  
  24. }
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