Handle let in for/while/etc. statements

Author: kylekatarnls

examples/for.js

@@ -0,0 +1,7 @@
+let n = 1;
+
+for (let i = 0; i < 3; i++) {
+    n *= 2;
+}
+
+return n;

examples/for.return

@@ -0,0 +1 @@
+8

src/JsPhpize/Lexer/DataBag.php

@@ -21,12 +21,12 @@ public function is($value)
         return in_array($value, [$this->type, $this->value]);
     }
 
-    protected function typeIn($values)
+    public function typeIn($values)
     {
         return in_array($this->type, $values);
     }
 
-    protected function valueIn($values)
+    public function valueIn($values)
     {
         return in_array($this->value, $values);
     }

src/JsPhpize/Parser/Parser.php

@@ -104,7 +104,12 @@ protected function parseParentheses($allowedSeparators = [',', ';'])
                 continue;
             }
 
-            if ($token->is('var')) {
+            if ($token->type === 'keyword' && $token->valueIn(['var', 'const', 'let'])) {
+                // @TODO handle let scope here
+                // if ($token->value === 'let') {
+                //     $this->letForNextBlock = $this->parseLet();
+                // }
+
                 continue;
             }
 
@@ -367,7 +372,7 @@ protected function parseKeywordStatement($token)
         $keyword = new Block($name);
         switch ($name) {
             case 'typeof':
-                exit('ici');
+                throw new Exception('typeof keyword not supported', 26);
                 break;
             case 'new':
             case 'clone':
@@ -430,7 +435,7 @@ protected function parseInstruction($block, $token, &$initNext)
 
             if ($token->value === 'let') {
                 $initNext = true;
-                $block->let($this->parseLet($token));
+                $block->let($this->parseLet());
 
                 return true;
             }
@@ -473,6 +478,10 @@ protected function parseInstructions($block)
         }
     }
 
+    /**
+     * @param Block $block
+     * @throws \JsPhpize\Lexer\Exception
+     */
     public function parseBlock($block)
     {
         $this->stack[] = $block;