In Perl, you can check if a class has a method using the "can" function. The "can" function checks if an object or class has a method named after the specified string value. If the method exists, it returns a reference to the sub that implements the method.
Here's an example of how to use "can" to check if a class has a method:
package MyClass;
sub new {
my $class = shift;
my $self = {};
bless($self, $class);
return $self;
}
sub foo {
print "foo\n";
}
1;
In this example, the "MyClass" class has a method named "foo". To check if "MyClass" has a "foo" method, you can use the "can" function like this:
use strict;
use warnings;
use MyClass;
my $obj = MyClass->new();
if ($obj->can('foo')) {
print "MyClass has a foo method.\n";
} else {
print "MyClass does not have a foo method.\n";
}
This code creates an instance of MyClass and then checks if it has a "foo" method using the "can" function. Since MyClass does have a "foo" method, the script outputs "MyClass has a foo method."