Re^2: Creating exception classes

[tobyink]

"When you write A::B::C in your program, perl searches all the directories in @INC for a directory named A that has a subdirectory named B, which contains a file called C.pm."

No it doesn't. It only does that search if you write use A::B::C, no A::B::C or require A::B::C. Merely mentioning the A::B::C package (for example, to call a constructor) does not force Perl to attempt to load the module.

The following code does not attempt to load "This/File/Does/No/Exist/On/My/Disk.pm"...

use strict;
use warnings;

{
    package This::File::Does::No::Exist::On::My::Disk;
    require Math::BigInt;
    our @ISA = 'Math::BigInt';
}

my $number = This::File::Does::No::Exist::On::My::Disk->new(7);
print $number * 6, "\n";