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--- rfc:immutability [2018/02/19 21:09] – marijic.silvio
+++ rfc:immutability [2018/02/19 21:13] – marijic.silvio
@@ Line 134: / Line 134: @@
 </code>
+==== Comparison ====
+Identity of immutable object is based on its value. So two immutable are identical if they are of the same type and contain same value.
+<code php>
+immutable class Email {
+  public $email;
+  public function __construct ($email) {
+    // validation
+    $this->email = $email;
+  }
+}
+$email1 = new Email("foo@php.net");
+$email2 = new Email("foo@php.net");
+var_dump($email1 === $email2); // bool(true)
+</code>
 ===== Examples =====