On Mon Aug 19 08:21:17 2013, TOBYINK wrote:
Show quoted text> sub delay {
> say 1;
> force($_[0]);
> say 3;
> }
>
> use Params::Lazy delay => "^";
>
> sub foo {
> delay(say $_[0]);
> }
>
> foo(2);
>
>
> I'd expect output to look like:
>
> 1
> 2
> 3
>
> But it's actually more like:
>
> 1
> SCALAR(0x9273ea0)
> 3
>
> This is probably impossible to get working right; if it were
> documented as another limitation, I'd consider the issue resolved.
Thank you for my first bug report! :D
This might actually be fixable[*], but I can't decide whenever the behavior would be correct. It'd leave @_ inconsistent with the rest of the global variables:
sub delay;
use Params::Lazy delay => '^';
sub delay {
my $d = shift;
local @_ = "happy fun times";
local $_ = "happier fun times";
say force $d;
}
@_ = "original";
$_ = "more so";
delay($_);
delay(@_);
For $_, you'd see the value that the sub is explicitly setting up, but for @_, you'd see the value from the upper scope.
On the other hand, I can see how having the caller's @_ would be useful. This is tricky. A possible workaround, which I haven't tried, is to add more evil into the mix and try using Scope::Upper.
Perhaps I need to add a force_with_caller_args function. But with a less silly name.
[*] famous last words, considering I haven't even tried yet :)
