c99/c++ localised variable definition
Poul-Henning Kamp
phk at phk.freebsd.dk
Mon Jan 31 04:36:19 PST 2005
In message <20050131122609.GA83556 at gurney.reilly.home>, Andrew Reilly writes:
>If you carelessly c++-ify a loop like:
>
> for (int i = 0; i < N; i++)
> {
> if (some_condition(i)) break;
> }
> do_something_with(i); /* use finishing index */
>
>you can miss the fact that the value of i is used outside of the
>loop. The newly created scope for "i" shadows the presumably
>pre-existing definition of i at the top of the function, which
>is what do_something_with() gets to see.
I would _really_ hope we have the compiler warning about this
already ?
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
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