Re: Patch to remove undefined C code

[Bernd Schmidt]

On Tue, 17 Oct 2000, Richard Guenther wrote:
> On Tue, 17 Oct 2000, Bernd Schmidt wrote:
> > On Tue, 17 Oct 2000, Richard Guenther wrote:
> > > The following one is wrong, tho - should be rather
> > >                 str[i] = dn[i]; i++;
> > 
> > Nope.  (Well, at least you need to add extra braces.)  The comma is a
> > sequence point.
> 
> Umm, I thought, dn[i], i++ evaluates to i and dn[i++] evaluates
> to dn[i], so it should be either i++, dn[i-1] or the one I showed
> above?

According to operator precedence rules,
        str[i] = dn[i], i++;
is equivalent to
        (str[i] = dn[i]), i++;

Comma has the lowest precedence of all C operators.


Bernd

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