Documentation for routine === assembled from the following types:

language documentation Operators

From Operators

(Operators) infix ===

sub infix:<===>(Any, Any)

Value identity operator. Returns True if both arguments are the same object, disregarding any containerization.

my class A { };
my $a = A.new;
say $a === $a;              # OUTPUT: «True␤» 
say A.new === A.new;        # OUTPUT: «False␤» 
say A === A;                # OUTPUT: «True␤»

For value types, === behaves like eqv:

say 'a' === 'a';            # OUTPUT: «True␤» 
say 'a' === 'b';            # OUTPUT: «False␤» 
 
my $b = 'a';
say $b === 'a';             # OUTPUT: «True␤» 
 
# different types 
say 1 === 1.0;              # OUTPUT: «False␤»

=== uses the WHICH method to obtain the object identity.

If you want to create a class that should act as a value type, then that class must create an instance method WHICH, that should return a ValueObjAt object that won't change for the lifetime of the object.

role Enumeration

From Enumeration

(Enumeration) method ===

Defined as

multi infix:<===> (Enumeration:D \a, Enumeration:D \b)

Equality of Enumeration symbols:

say Norse-gods.pick() === Freija for ^3; # OUTPUT: «False␤False␤True␤»