I'm trying to generate random prime number
print Math::Prime::Util->random_strong_prime(128);
But, when I call one of the methods (i tried various) of Math::Prime::Util, I get:
Parameter 'Math::Prime::Util' must be a positive integer at /home/ivan/perl5/lib/perl5/x86_64-linux-thread-multi/Math/Prime/Util.pm line 400.
I can't understend what's wrong, 128 is positive and integer. Script runs under Starman server(psgi)
When you use the method invocation syntax, i.e.,
Math::Prime::Util->random_strong_prime(128);
the first argument to random_strong_prime becomes the string "Math::Prime::Util" which is not a positive integer. With method invocation syntax, 128 becomes the second parameter.
The syntax you are using is appropriate for invoking a class method.
Instead, you want to use function invocation syntax:
print Math::Prime::Util::random_strong_prime(128);
You can verify this using the following simple program:
#!/usr/bin/env perl
package Hello;
sub f { print "@_\n" }
package main;
Hello->f('world');
Hello::f('world');
$ ./gg.pl Hello world world