Add support for chained functions based off of legacy PR:

d13r/laravel-breadcrumbs#210

(Original PR repo was deleted, so code had to be manually copy-pasted)

Closes #25

src/Generator.php

@@ -71,11 +71,14 @@ protected function call(string $name, array $params): void
      *
      * @param string $name The name of the parent page.
      * @param array ...$params The parameters to pass to the closure.
+     * @return self
      * @throws InvalidBreadcrumbException
      */
-    public function parent(string $name, ...$params): void
+    public function parent(string $name, ...$params): self
     {
         $this->call($name, $params);
+
+        return $this;
     }
 
     /**
@@ -86,9 +89,12 @@ public function parent(string $name, ...$params): void
      * @param string $title The title of the page.
      * @param string|null $url The URL of the page.
      * @param array $data Optional associative array of additional data to pass to the view.
+     * @return self
      */
-    public function push(string $title, ?string $url = null, array $data = []): void
+    public function push(string $title, ?string $url = null, array $data = []): self
     {
         $this->breadcrumbs->push((object)array_merge($data, compact('title', 'url')));
+
+        return $this;
     }
 }

tests/AdvancedUsageTest.php

@@ -283,4 +283,24 @@ public function testClearCurrentRoute()
 
         Breadcrumbs::render();
     }
+
+    public function testBreadcrumbsSupportForArrowFunctions()
+    {
+        Route::name('home')->get('/', function () { });
+        Route::name('blog.index')->get('/blog', function () { });
+
+        Breadcrumbs::for('home', function ($trail) {
+            $trail->push('Some Data')
+                ->push('Another Set');
+        });
+
+        Breadcrumbs::for('blog.index', function ($trail) {
+            $trail->parent('home')
+                ->push('Yet Another');
+        });
+
+        $breadcrumbs = Breadcrumbs::generate('blog.index');
+
+        $this->assertCount(3, $breadcrumbs);
+    }
 }