From 9fe0020eda838c2d4599da0facf9fba09fcd5b2f Mon Sep 17 00:00:00 2001
From: Dave Liddament <dave@lampbristol.com>
Date: Mon, 12 Aug 2024 21:03:47 +0100
Subject: [PATCH] ADD examples of Friend with inheritance

---
 examples/friend/friendWIthInheritance.php  | 41 ++++++++++++++++++++
 examples/friend/friendWIthInheritance2.php | 45 ++++++++++++++++++++++
 2 files changed, 86 insertions(+)
 create mode 100644 examples/friend/friendWIthInheritance.php
 create mode 100644 examples/friend/friendWIthInheritance2.php

diff --git a/examples/friend/friendWIthInheritance.php b/examples/friend/friendWIthInheritance.php
new file mode 100644
index 0000000..092a870
--- /dev/null
+++ b/examples/friend/friendWIthInheritance.php
@@ -0,0 +1,41 @@
+<?php
+
+declare(strict_types=1);
+
+namespace FriendWithInheritance;
+
+use DaveLiddament\PhpLanguageExtensions\Friend;
+
+
+interface Emailer
+{
+    #[Friend(EmailQueueProcessor::class)]
+    public function sendEmail(): void;
+}
+
+class PhpMailer implements Emailer
+{
+    public function sendEmail(): void
+    {
+    }
+}
+
+
+class EmailQueueProcessor
+{
+    public function sendEmail(): void
+    {
+        $mailer = new PhpMailer();
+        $mailer->sendEmail(); // OK
+    }
+}
+
+class AnotherClass {
+    public function sendEmail(): void
+    {
+        $mailer = new PhpMailer();
+        $mailer->sendEmail(); // ERROR
+    }
+}
+
+
diff --git a/examples/friend/friendWIthInheritance2.php b/examples/friend/friendWIthInheritance2.php
new file mode 100644
index 0000000..d055869
--- /dev/null
+++ b/examples/friend/friendWIthInheritance2.php
@@ -0,0 +1,45 @@
+<?php
+
+declare(strict_types=1);
+
+namespace FriendWithInheritance2;
+
+use DaveLiddament\PhpLanguageExtensions\Friend;
+
+
+interface Command
+{
+    #[Friend(CommandProcessor::class)]
+    public function execute(): void;
+}
+
+class PrintCommand implements Command
+{
+
+    public function execute(): void
+    {
+    }
+}
+
+
+interface CommandProcessor
+{
+    public function process(Command $command);
+}
+
+class PrintCommandProcessor implements CommandProcessor
+{
+    public function process(Command $command): void
+    {
+        $command->execute(); // OK
+    }
+}
+
+
+class AnotherClass
+{
+    public function process(Command $command):  void
+    {
+        $command->execute(); // ERROR
+    }
+}
\ No newline at end of file