Thanks! Knew I'd seen the concept of OUTER but couldn't remember the
keyword.
-y
On Wed, Oct 3, 2018 at 5:51 AM, Timo Paulssen <t...@wakelift.de> wrote:
> you can refer to the outer $v as OUTER::('$v'), that ought to help :)
> On 03/10/2018 08:10, yary wrote:
>
> Reading and playing with https://docs.perl6.org/routine/temp
>
> There's an example showing how temp is "dynamic" - that any jump outside a
> block restores the value. All well and good.
>
> Then I thought, what if I want a lexical temporary value- then use "my"-
> and this is all well and good:
>
> my $v = "original";
> {
> my $v = "new one";
> start {
> say "[PROMISE] Value before block is left: `$v`";
> sleep 1;
> say "[PROMISE] Block was left while we slept; value is still `$v`";
> }
> sleep ½;
> say "About to leave the block; value is `$v`";
> }
> say "Left the block; value is now `$v`";
> sleep 2;
>
> Then I thought, well, what if I want to initialize the inner $v with the
> outer $v.
>
> my $v = "original";
> {
> my $v = $v; # "SORRY! Cannot use variable $v in declaration to
> initialize itself"
> say "inner value is $v";
> $v= "new one";
> ...
>
> Gentle reader, how would you succinctly solve this contrived example?
> Anything you like better than this?
>
> my $v = "original";
> given $v -> $v is copy {
> say "inner value is $v"; # "original", good
> $v= "new one";
> ....
>
> -y
>
>
