Re: Doubt in assigning hash reference values for Constant pragma declaration ?

use constant A => $hash;
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is evaluated at compilation time, before

my $hash = { 'a' => 2 };
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has been executed.

Yo can use a BEGIN block to make the assignment at compile time:

my $hash;
BEGIN { $hash = { 'a' => 2 } }
use constant A => $hash;
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Or also:

my $hash;
use constant A => $hash = {'a' => 2};
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