Graham Barr writes:
: On Mon, Jan 21, 2002 at 01:01:09PM -0800, Larry Wall wrote:
: > Graham Barr writes:
: > : But are we not at risk of introducing another form of
: > :
: > : my $x if 0;
: > :
: > : with
: > :
: > : if my $one = <ONE> {
: > : ...
: > : }
: > : elsif my $two = <TWO> {
: > : }
: > :
: > : if ($two) {
: > : ...
: > : }
: >
: > Then it's just undefined. It's no different from how &&, ||, or ??::
: > work when you put a declaration in something that's conditionalized.
:
: Right. So we need to make sure that the implementation does that. In Perl5
: my has a runtime part, so if it is not actually run then the lexical
: can hold the value of the previous time it was executed.
Well, true enough. Perhaps "undefined" is too meaningful. We could
borrow a phrase from Ada culture and just call it "erroneous".
Larry
