Thread: overloading extraction and insertion

  1. #1
    Registered User brianptodd's Avatar
    Join Date
    Oct 2002

    overloading extraction and insertion

    I have written a field class that inherits from the string class, but I need to overload the << and >> operators to handle input/output to a file but I am having trouble with the implementation.

    Any help?
    "In theory, there is no difference between theory and practice. But, in practice, there is."
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  2. #2
    mustang benny bennyandthejets's Avatar
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    Jul 2002
    Post what code you do have, and the errors you're getting.
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  3. #3
    Registered User jlou's Avatar
    Join Date
    Jul 2003
    In addition to posting code, maybe you can reassure us that you've considered the fact that is generally considered a bad idea to use a class that has no virtual destructor (or any other virtual functions) as a base class. In this case, string was not designed to be inherited from through public derivation.

    If you have considered this, then okay, good luck.

    If not, then maybe you should consider a different solution. Or if you are interested maybe I or someone else here can explain the dangers of doing that in more detail.

  4. #4
    Registered User
    Join Date
    May 2003
    Yeah -- deriving from std::string == bad

    Perhaps you can create a new typedef with different parameters to std::basic_string, and then overload the functions you need.
    You ever try a pink golf ball, Wally? Why, the wind shear on a pink ball alone can take the head clean off a 90 pound midget at 300 yards.

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