I don't have a script named "main".
main is the default package if no package statement has
declared any other.
I have no idea what perl would think if I tried $main::DEBUG.
This is the "fully qualified" form of a package-global name.
It is always valid.
Even under strict, fully-qualified package globals can
always be accessed with or without pre-declaration.
Some examples:
Win8 Strawberry 5.30.3.1 (64) Mon 03/22/2021 6:33:58
C:\@Work\Perl\monks
>perl
use strict;
use warnings;
package Bar {
# package-globals can always be accessed in fully-qualified form
$main::foo = "hi, i'm assigning this in " . __PACKAGE__ . "\n";
}
print "A: this is being printed from default package ", __PACKAGE__, "
+\n";
# global $foo not yet declared in main: must access fully-qualified
print "B: i'm accessing this from ", __PACKAGE__, ": $main::foo";
our $foo; # declare global $foo in package main
print "C: i'm accessing this from ", __PACKAGE__, ": $foo";
^Z
A: this is being printed from default package main
B: i'm accessing this from main: hi, i'm assigning this in Bar
C: i'm accessing this from main: hi, i'm assigning this in Bar
Give a man a fish: <%-{-{-{-<
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