Perl Variable Aliases
Published on 27 Nov 2005Tags #Perl
When a variable is passed by value, Perl does not create a copy of the contents to build @_ but, rather, creates an alias to the contents of the original variable. Therefore, a memory blow-up is caused by reading from @_.
#!/usr/bin/perl
use strict;
use warnings;
use English qw(-no_match_vars);
use locale;
my $variable = 'data';
implicit_pass_by_reference($variable);
print $variable . "n";
sub implicit_pass_by_reference {
my $argument = $_[0];
$$argument = 'new data';
}
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