Initial Commit

dependencies/amphp/amp/lib/Producer.php

@@ -0,0 +1,38 @@
+<?php
+
+namespace WP_Ultimo\Dependencies\Amp;
+
+/**
+ * @template-covariant TValue
+ * @template-implements Iterator<TValue>
+ */
+final class Producer implements Iterator
+{
+    /**
+     * @use Internal\Producer<TValue>
+     */
+    use CallableMaker, Internal\Producer;
+    /**
+     * @param callable(callable(TValue):Promise):\Generator $producer
+     *
+     * @throws \Error Thrown if the callable does not return a Generator.
+     */
+    public function __construct(callable $producer)
+    {
+        $result = $producer($this->callableFromInstanceMethod("emit"));
+        if (!$result instanceof \Generator) {
+            throw new \Error("The callable did not return a Generator");
+        }
+        $coroutine = new Coroutine($result);
+        $coroutine->onResolve(function ($exception) {
+            if ($this->complete) {
+                return;
+            }
+            if ($exception) {
+                $this->fail($exception);
+                return;
+            }
+            $this->complete();
+        });
+    }
+}