Hello !
It's not a trouble report, but I'll share my experience and maybe
somebody could tell me if there is
better/simpler solution.
I had to create code, that will alias to shortcut variable.
Simple answer is
*V = \$some_long_var;
So, modifying $V will change $some_long_var also because of aliasing.
*But* this does not work in mod_perl/Mason environment
E.g. real code snippet:
my %field_vals;
if ( $Q::process2 )
{
foreach my $hr ( @fields )
{ next if $$hr{HIDDEN} eq 'Y';
my $name = $$hr{PARAM_NAME};
local/my/our $V;
*V = \$field_vals{$name}; #aliasing
-- troubles were here
$V = eval('$Q::' . $name);
#...
#...
#we need to access modified %field_vars here...
Declaring $V
- as "local" will lead to "Variable "$V" is not imported at..." error.
- as "my" will not publish changes to outer scope
- as "our" works, but potentially is not safe in mod_perl/Mason since
you'll change global $V,
which is maybe used in another subroutines...
So, after reading documentation I found rarely used "local our" variable
declaration syntax.
Therefore aliasing should look like
local our $V;
*V = \$some_long_var;
in mod_perl/Mason environment.
It solved my problems, and I hope it will help somebody else.
Thanks,
Ruslan
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