Merge pull request #5 from Stillat/default-slot-value

Make `$slot` value always available for developer happiness

src/Compiler/TemplateCompiler.php

@@ -484,6 +484,7 @@ protected function compileNodes(array $nodes): string
 if ($__slotContainerVarSuffix->hasDefaultSlotContent()) { $__componentData['slot'] = $__slotContainerVarSuffix->getDefaultContent(); }
 
 (function () use ($__tmpVars, $__componentData) {
+$slot = \Stillat\Dagger\Runtime\SlotContainer::getEmptySlot();
 extract($__tmpVars);extract($componentVarName->getMacros());extract($__componentData);extract($componentVarName->data->toArray());
 ?>#inner#<?php
 })();

src/Runtime/SlotContainer.php

@@ -8,8 +8,19 @@ class SlotContainer
 {
     const DEFAULT_SLOT_KEY = '-default-';
 
+    protected static ?ComponentSlot $emptySlot = null;
+
     protected array $contents = [];
 
+    public static function getEmptySlot(): ComponentSlot
+    {
+        if (static::$emptySlot === null) {
+            static::$emptySlot = new ComponentSlot;
+        }
+
+        return static::$emptySlot;
+    }
+
     public function setSlotContent(string $slotName, string $contents, array $attributes = []): void
     {
         $this->contents[$slotName] = new ComponentSlot($contents, $attributes);

tests/Compiler/SlotsTest.php

@@ -239,3 +239,7 @@
         $this->render($template)
     );
 });
+
+test('default slot value is injected', function () {
+    $this->assertSame('<div></div>', $this->render('<c-empty_slot />'));
+});

tests/resources/components/empty_slot.blade.php

@@ -0,0 +1 @@
+<div>{{ $slot }}</div>