Catch exception by reference

This is a discussion on Catch exception by reference within the C++ Programming forums, part of the General Programming Boards category; I am looking at some articles about catch exception by reference. I don't know what is the difference from this ...

  1. #1
    Registered User
    Join Date
    Sep 2009
    Posts
    14

    Catch exception by reference

    I am looking at some articles about catch exception by reference.
    I don't know what is the difference from this and my usual way as below.
    Could you tell me??
    Code:
    try
    {
    
    
    
    } catch( exception ex)
    {
                 textbox1.text=ex.message;
    }

  2. #2
    The larch
    Join Date
    May 2006
    Posts
    3,573
    In normal C++, catching by value involves slicing. Usually code throws exception that are derived from std::exception. If you catch by value, you lose the derived part of the exception object.

    Your code however doesn't appear to be standard C++ but I guess the same reasoning may apply.
    I might be wrong.

    Thank you, anon. You sure know how to recognize different types of trees from quite a long way away.
    Quoted more than 1000 times (I hope).

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