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Internet Message Format  |  1996-08-05  |  1.6 KB
  1. Path: news.sinet.slb.com!usenet
  2. From: "Vinh D. Nguyen" <vnguyen@sugar-land.anadrill.slb.com>
  3. Newsgroups: comp.lang.c++
  4. Subject: Re: Q: default copy constructor
  5. Date: Tue, 12 Mar 1996 18:03:19 -0600
  6. Organization: Schlumberger Anadrill
  7. Message-ID: <314610C7.5BB4@sugar-land.anadrill.slb.com>
  8. References: <4i49tj$991@azure.acsu.buffalo.edu>
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  14.  
  15. Li Chen wrote:
  16. > 
  17. > Hi, everyone:
  18. > 
  19. > Ihave a question:does a C++ compiler generate copy constructor
  20. > if there is none in the program?
  21. > 
  22. > Thank you.
  23. > 
  24. > David
  25. > 
  26. > --
  27. > ___________________________________________________________________________
  28. > ---------------------------------------------------------------------------
  29. > 
  30. > David Li Chen
  31.  
  32. Yes, but the compiler will generate only a shallow copy constructor. That is,
  33. suppose A contains a pointer to C, after B = A, B points to the same C object.
  34. This may create a problem because if A destroys C upon its own destruction
  35. then B would point to an object that no longer exists.
  36.  
  37. -- 
  38. --------------------------------------------------------------------------
  39. * Vinh Nguyen                                            vnguyen@slb.com *
  40. * Drilling Information Products - Senior Engineer                        *
  41. * Anadrill Schlumberger                             *
  42. * 200 Gillingham Ln.                             (713) 275-7524 (Office) *
  43. * Sugarland, TX 77478                            (713) 275-8098 (FAX)    *
  44. --------------------------------------------------------------------------
  45.