On 8/12/07, Mr. Shawn H. Corey <[EMAIL PROTECTED]> wrote:
> John W. Krahn wrote:
> > yitzle wrote:
> >> Works:
> >> my $t = shift;
> >> my $id = qr($t);
> >> Doesn't work:
> >> my $id = qr(shift);
> >>
> >> Why?
> >
> > perldoc -q "How do I expand function calls in a string"
>
> It's because qr is not a function, it's a quote-like operator.
>
No, it's because shift *is* a function.
As OP's example shows, variables interpolate, functions don't. The
difference between qr($t) and qr(shift) doesn't have anything to do
with qr(). It has to do with shift's behavior WRT string
interpolation. It doesn't matter whether the interpolated string is
being passed to an operator, a function, a subroutine, or someplace
else:
print "shift something my way";
print shift . " something my way";
See the FAQ John pointed you to for some ways around this.
HTH
-- jay
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