On Mon, Jul 07, 2008 at 10:09:37PM -0700, Larry Wall wrote:
: So
:
: $x = nothing(); # = []
: @x = nothing(); # = ()
: %x = nothing(); # = ()
: if nothing() {...} # always false
: $x = nothing()[0] # "Subscript out of range" failure
But note that binding the returned capture also fails:
$x := nothing();
just as calling foo() without args can't bind to a sig with required
params:
sub foo ($x) {...}
Binding to $x is more like looking for .[0], in other words.
Note however that when you call
foo(nothing())
you're really passing a Capture with 1 positional element, which
contains the empty Capture returned by nothing(), so $x is presumably
bound to [] by promotion of the empty list, just as
foo(threeitems())
would bind an array of 3 elements.
Larry
