Add support for array destructuring

README.md

@@ -42,6 +42,9 @@ $ php box.phar compile
 $ docker-compose run --rm php vendor/bin/phpunit
 ```
 
+## Zephir Docker Image
+
+If you want to compile your Zephir zep files for PHP Alpine 3.8 Docker images try my [Zephir Docker images](https://github.com/sandrokeil/docker-files/tree/master/zephir).
 
 ## Limitations
 

src/PhpParser/NodeVisitor/ArrayDestructuring.php

@@ -0,0 +1,50 @@
+<?php
+/**
+ * Sandro Keil (https://sandro-keil.de)
+ *
+ * @link      http://github.com/sandrokeil/php-to-zephir for the canonical source repository
+ * @copyright Copyright (c) 2018 Sandro Keil
+ * @license   http://github.com/sandrokeil/php-to-zephir/blob/master/LICENSE.md New BSD License
+ */
+declare(strict_types=1);
+
+namespace PhpToZephir\PhpParser\NodeVisitor;
+
+use PhpParser\NodeVisitorAbstract;
+use PhpParser\Node;
+
+class ArrayDestructuring extends NodeVisitorAbstract
+{
+    public function leaveNode(Node $node)
+    {
+        if ($node instanceof Node\Stmt\Expression
+            && $node->expr instanceof Node\Expr\Assign
+            && $node->expr->expr instanceof Node\Expr\Array_
+            && $node->expr->var instanceof Node\Expr\Array_
+        ) {
+            $stmts = array_map(function (Node\Expr\ArrayItem $item) {
+                return new Node\Expr\Variable($item->value->name);
+            }, $node->expr->var->items);
+
+            $arrayName = bin2hex(random_bytes(6));
+            $key = -1;
+            $destructuring = array_map(function (Node\Expr\ArrayItem $item) use ($stmts, $arrayName, &$key) {
+                $key++;
+                $name = clone $stmts[$key];
+                $name->setAttribute('init', false);
+                return new Node\Expr\Assign($name, new Node\Expr\ArrayDimFetch(
+                    new Node\Expr\Variable($arrayName, $item->getAttributes()),
+                    new Node\Scalar\LNumber($key)
+                ));
+            }, $node->expr->var->items);
+
+            $node->expr->var = new Node\Expr\Variable($arrayName, $node->getAttributes());
+
+            $stmts[] = $node;
+
+            $stmts = array_merge($stmts, $destructuring);
+
+            return $stmts;
+        }
+    }
+}

src/ZephirPrinter.php

@@ -16,6 +16,7 @@
 use PhpParser\Node\Stmt;
 use PhpParser\Node\Expr\AssignOp;
 use PhpParser\Node\Expr\BinaryOp;
+use PhpToZephir\PhpParser\NodeVisitor\InitLocalVariable;
 
 /**
  * Zephir Printer

test/ZephirPrinterTest.php

@@ -12,6 +12,7 @@
 
 use PhpParser\ParserFactory;
 use PhpParser\NodeTraverser;
+use PhpToZephir\PhpParser\NodeVisitor\ArrayDestructuring;
 use PhpToZephir\PhpParser\NodeVisitor\InitLocalVariable;
 use PhpToZephir\PhpParser\NodeVisitor\RemoveUseFunction;
 use PhpToZephir\PhpParser\NodeVisitor\UnsetSplitter;
@@ -42,6 +43,7 @@ protected function setUp()
         $this->traverser->addVisitor(new InitLocalVariable());
         $this->traverser->addVisitor(new RemoveUseFunction());
         $this->traverser->addVisitor(new UnsetSplitter());
+        $this->traverser->addVisitor(new ArrayDestructuring());
         $this->zephirPrinter = new ZephirPrinter();
     }
 
@@ -452,4 +454,31 @@ public function it_converts_unset(): void
 
         $this->assertEquals($expectedCode, $current, $current);
     }
+
+    /**
+     * @test
+     */
+    public function it_converts_array_destructuring(): void
+    {
+        $code = <<<'CODE'
+<?php
+[$firstName, $lastName] = ["John", "Doe"];
+CODE;
+
+        $ast = $this->parser->parse($code);
+        $ast = $this->traverser->traverse($ast);
+        $current = $this->zephirPrinter->prettyPrintFile($ast);
+
+        /**
+         * var firstName;
+         * var lastName;
+         * let db5910704831 = ["John", "Doe"];
+         * let firstName = db5910704831[0]
+         * let lastName = db5910704831[1]
+         */
+        $this->assertTrue(strpos($current, 'var firstName;') !== false, $current);
+        $this->assertTrue(strpos($current, 'var lastName;') !== false, $current);
+        $this->assertTrue(strpos($current, 'let firstName = ') !== false, $current);
+        $this->assertTrue(strpos($current, 'let lastName = ') !== false, $current);
+    }
 }