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Re: Const correctness
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Re: Const correctness


  • Subject: Re: Const correctness
  • From: Clark Cox <email@hidden>
  • Date: Thu, 9 Jun 2005 07:49:42 -0400

On 6/9/05, Markian Hlynka <email@hidden> wrote:
> >>
> >> And the runtime crash in the above example has absolutely nothing to
> >> do with 'const' and everything to do with trying to change an
> >> embedded string.
> >> I.e. the following crashes exactly the same:
> >>      char* noConstsAreBetter = "these consts suck\n";
> >>      printf( noConstsAreBetter );
> >>      noConstsAreBetter[0] = 'T';
> >>      printf( noConstsAreBetter );
> >>
>
> I seem to recall this is because literals like this are allocated on
> the heap, not the stack. That's why bad things happen when you try to
> change it. The heap is not for you. ;-)

This has nothing to do with the heap or the stack. It is simply
because the C and C++ standards say that attempting to modify a string
literal is undefined behavior.

--
Clark S. Cox III
email@hidden
http://www.livejournal.com/users/clarkcox3/
http://homepage.mac.com/clarkcox3/
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  • Follow-Ups:
    • Re: Const correctness
      • From: Andreas Grosam <email@hidden>
References: 
 >Const correctness (From: "Theodore H. Smith" <email@hidden>)
 >Re: Const correctness (From: Cameron Hayne <email@hidden>)
 >Re: Const correctness (From: Keith Ray <email@hidden>)
 >Re: Const correctness (From: Markian Hlynka <email@hidden>)

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