a "localised" lexvar my var;for $var(){} has the same "closuring"-effects like a for my $var () {} .

A capture is really a form of aliasing. A slot in the new sub's pad is aliased to the SV of the captured variable. Or three, if another variable already refers to that SV. 

$ perl -MDevel::Peek -e'
    my $foo = "foo";
    my $x;
    Dump($x);
    Dump($foo);
    for $x ($foo) {
       Dump($x);
       $f = sub { Dump($x) }
    }
    $f->()
'
SV = NULL(0x0) at 0x814f69c
SV = PV(0x814fb00) at 0x814ecdc
SV = PV(0x814fb00) at 0x814ecdc
SV = PV(0x814fb00) at 0x814ecdc

[download]

All three names ($foo, loop's $x and sub's $x) all reference (are all aliased to) the same SV (0x814ecdc).

In reply to Re^2: How do closures and variable scope (my,our,local) interact in perl? by ikegami
in thread How do closures and variable scope (my,our,local) interact in perl? by ELISHEVA

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