Perl 6 Deep Dive

Value identity operator

The === operator is the value identity operator. For the scalar values, it gives the same results as the eqv operator—it returns true when both the types and the values of the operands are the same, as you can see here:

my $a = 42;my $b = 42;say $a === $b; # True

This is another example with a string and an integer:

my $a = 42;my $c = "42";say $a === $c; # False

For classes, the === operator returns True if both operands point to the same object, as shown in this example:

class O {}my $o1 = O.new();my $o2 = O.new();say $o1 === $o2; # False: same class but different objectsmy $o3 = $o1;say $o1 === $o3; # True: the same object

More on classes in Chapter 8, Object-Oriented Programming.