Add widget expression.

Handles the output of the executed widget allowing it both to be echoed as well as still accessed like an object

src/Expression.php

@@ -0,0 +1,44 @@
+<?php
+
+namespace Benrowe\Laravel\Widgets;
+
+use Arrilot\Widgets\AbstractWidget;
+use Illuminate\Support\HtmlString;
+
+/**
+ * Represents the widget after it has been executed.
+ *
+ * This expression allows the widets to be outputted (aka echo'd) or
+ * allows access to the public methods of the widget inside the view.
+ *
+ * @package Benrowe\Laravel\Widgets
+ */
+class Expression extends HtmlString
+{
+    protected $widget;
+
+    public function __construct($html, AbstractWidget $widget)
+    {
+        $this->widget = $widget;
+        parent::__construct($html);
+    }
+
+    public function getWidget()
+    {
+        return $this->widget;
+    }
+
+    public function __call($method, array $params = [])
+    {
+        if (is_callable($this->widget, $method)) {
+            return call_user_func_array([$this->widget, $method], $params);
+        }
+        throw new InvalidArgumentException(
+            sprintf(
+                '"%s" does not have a method of "%s"',
+                get_class($this->widget),
+                $method
+            )
+        );
+    }
+}