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goto from within try block

This is a discussion on goto from within try block within the C++ Programming forums, part of the General Programming Boards category; Hi Just to make sure, if there is goto from within try block then we will not arrive to finally, ...

  1. #1
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    goto from within try block

    Hi
    Just to make sure, if there is goto from within try block then we will not arrive to finally, correct?
    Thanks

  2. #2
    &TH of undefined behavior Fordy's Avatar
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    'finally' - are you referring to structured exception handling or C++ handling?

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    C++ Witch laserlight's Avatar
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    There is no finally block for exception handling in standard C++. If you really are asking with respect to some C++ compiler extension, then you should provide more details on the compiler that you have in mind. Oh, and a code example can help.
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  4. #4
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    I think the more relevant question is: is there anything you can do to eliminate that goto? it's true that there are situations where a goto is the only/best option, but I think you should evaluate your code and determine if there's a better way in your case.

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    VS.
    Of course the code isn't mine, I need to maintain it while doing minimum changes.

  6. #6
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    But you still haven't given enough detail. Are you using a compiler with an extension that has a "finally" block? Can you post some code?

  7. #7
    Algorithm Dissector iMalc's Avatar
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    Do you mean __finally from SEH exception handling?
    Give us a quick sample of what the code looks like.
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  8. #8
    Captain Crash brewbuck's Avatar
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    Quote Originally Posted by walla View Post
    VS.
    Of course the code isn't mine, I need to maintain it while doing minimum changes.
    I've made many mistakes over the years doing things the dumb way in an attempt to have "low impact" on the code I'm working on. It has lead to many very embarrassing, funny, and depressing outcomes. If you fear the code you won't have the courage to make the correct changes to it. Often there is an air of mystery or superstition surrounding such code. Look at it wrong and it might run over your mother in the parking lot.

    Let me tell you, from experience, any problems you imagine you might have from changing this code, pale in comparison to the trouble you're in for if you continue to pile hack upon hack on top of it. If this code is truly a Jenga tower ready to crumble at the slightest touch, do you really think sticking a goto into it will improve matters?
    Code:
    //try
    //{
    	if (a) do { f( b); } while(1);
    	else   do { f(!b); } while(1);
    //}

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    Just to say, I already gave up and changed this stupid goto
    Anyway currently there is no finally there.
    Let's say that is __finally
    Does goto from catch make __finally irrelevant?

  10. #10
    &TH of undefined behavior Fordy's Avatar
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    Quote Originally Posted by walla View Post
    Just to say, I already gave up and changed this stupid goto
    Anyway currently there is no finally there.
    Let's say that is __finally
    Does goto from catch make __finally irrelevant?
    You are mixing C++ exceptions with Structured Exception Handling (a compiler/platform specific extension used mainly on Windows). Have a read up on SEH to find out more - Introduction to Exception Handling

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