Initial Commit

dependencies/amphp/amp/lib/Deferred.php

@@ -0,0 +1,70 @@
+<?php
+
+namespace WP_Ultimo\Dependencies\Amp;
+
+/**
+ * Deferred is a container for a promise that is resolved using the resolve() and fail() methods of this object.
+ * The contained promise may be accessed using the promise() method. This object should not be part of a public
+ * API, but used internally to create and resolve a promise.
+ *
+ * @template TValue
+ */
+final class Deferred
+{
+    /** @var Promise<TValue> Has public resolve and fail methods. */
+    private $resolver;
+    /** @var Promise<TValue> Hides placeholder methods */
+    private $promise;
+    public function __construct()
+    {
+        $this->resolver = new class implements Promise
+        {
+            use Internal\Placeholder {
+                resolve as public;
+                fail as public;
+                isResolved as public;
+            }
+        };
+        $this->promise = new Internal\PrivatePromise($this->resolver);
+    }
+    /**
+     * @return Promise<TValue>
+     */
+    public function promise() : Promise
+    {
+        return $this->promise;
+    }
+    /**
+     * Fulfill the promise with the given value.
+     *
+     * @param mixed $value
+     *
+     * @psalm-param TValue|Promise<TValue> $value
+     *
+     * @return void
+     */
+    public function resolve($value = null)
+    {
+        /** @psalm-suppress UndefinedInterfaceMethod */
+        $this->resolver->resolve($value);
+    }
+    /**
+     * Fails the promise the the given reason.
+     *
+     * @param \Throwable $reason
+     *
+     * @return void
+     */
+    public function fail(\Throwable $reason)
+    {
+        /** @psalm-suppress UndefinedInterfaceMethod */
+        $this->resolver->fail($reason);
+    }
+    /**
+     * @return bool True if the promise has been resolved.
+     */
+    public function isResolved() : bool
+    {
+        return $this->resolver->isResolved();
+    }
+}