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
