On Wed, Aug 19, 2009 at 04:54:10AM -0700, Moritz Lenz via RT wrote:
> On Wed Apr 08 14:59:19 2009, moritz wrote:
> > 23:55 <@moritz_> rakudo: my @a = 1..4; say @a[1..*].perl
> > 23:56 < p6eval> rakudo 6b9755: OUTPUT«[2, 3, 4, undef]»
> >
> > It should just be [2, 3, 4].
>
> Since the discussion came up on #perl6 if this is really the expected
> behaviour, S09 says:
>
> As the end-point of a range, a lone "whatever" means "to the maximum
> specified index" (if fixed indices were defined):
>
> say @calendar[5..*]; # Same as: say @calendar[5..11]
> say @calendar{Jun..*}; # Same as: say @calendar{Jun..Dec}
>
> or "to the largest allocated index" (if there are no fixed indices):
>
> say @data[1..*]; # Same as: say @results[1..5]
>
>
> It doesn't mention how the postcifcumfix:<[ ]> is supposed to introspect
> those to find out if the WhateverCode object constructed by 1..* needs
> to receive self.elems or self.elems-1 as an argument.
The short answer is that 1..* isn't a WhateverCode object, it's a Range
with a Whatever endpoint. (Rakudo currently gets this wrong, yes.)
So postcircumfix:<[ ]> then changes its dispatch based on having a
Range argument.
Pm
