On Mon, May 21, 2001 at 08:57:45AM +0100, Graham Barr wrote:
> On Sun, May 20, 2001 at 01:24:29PM +0100, Simon Cozens wrote:
> > On Sun, May 20, 2001 at 12:46:35AM -0500, Jonathan Scott Duff wrote:
> > > my $a is true = 0; # variable property
> > > my $a = 0 is true; # variable property
> > > my ($a) = 0 is true; # value property
> >
> > Wow. Totally ETOOCONFUSING.
>
> That has been exactly my thought as I have been reading this thread.
>
> I have been trying to think what properties would make sensible variable
> or value properties.
>
> So far all I can think of for variable properties are actually compile time
> properties like constant etc.
>
> So I am left wondering how much of an issue this really will be ?
>
Well that's the reason I think that they shouldn't be two separate things, and
that one should suffice.
And note that constants can be implemented in terms of run-time properties:
assign the constant run-time property the additional effect of dying/warning
if in fact the constant property is going away. ie:
my $variable = 0 is constant;
$variable = 1; # warn/and or die after variable tries to overwrite constantness.
Ed
