From eb7b9d585e5832a691e84df7cc9a3e9e0277b5e8 Mon Sep 17 00:00:00 2001
From: Stanislav Kiryukhin <korsar.zn@gmail.com>
Date: Fri, 2 Oct 2015 20:46:01 +0300
Subject: [PATCH] Added compiling for operator assign-bitwise only
 "assign-type: variable"

---
 .../Operators/AssignVariableOperator.php      | 16 ++++++
 Library/Statements/LetStatement.php           | 57 +++++++++++++++++++
 2 files changed, 73 insertions(+)

diff --git a/Library/Expression/Builder/Operators/AssignVariableOperator.php b/Library/Expression/Builder/Operators/AssignVariableOperator.php
index 40c80a2e94..daba3f7367 100644
--- a/Library/Expression/Builder/Operators/AssignVariableOperator.php
+++ b/Library/Expression/Builder/Operators/AssignVariableOperator.php
@@ -46,6 +46,22 @@ class AssignVariableOperator extends AbstractOperator
     // %=
     const OPERATOR_MOD = 'mod-assign';
 
+    // &=
+    const OPERATOR_BITWISE_AND = 'bitwise-and-assign';
+
+    // |=
+    const OPERATOR_BITWISE_OR = 'bitwise-or-assign';
+
+    // ^=
+    const OPERATOR_BITWISE_XOR = 'bitwise-xor-assign';
+
+    // <<=
+    const OPERATOR_BITWISE_SHIFTLEFT = 'bitwise-shiftleft-assign';
+
+    // >>=
+    const OPERATOR_BITWISE_SHIFTRIGHT = 'bitwise-shiftright-assign';
+
+
 
     private $variable;
     private $operator = self::OPERATOR_ASSIGN;
diff --git a/Library/Statements/LetStatement.php b/Library/Statements/LetStatement.php
index 4a72254861..d590bdc416 100644
--- a/Library/Statements/LetStatement.php
+++ b/Library/Statements/LetStatement.php
@@ -48,6 +48,9 @@
 use Zephir\Statements\Let\Incr as LetIncr;
 use Zephir\Statements\Let\ExportSymbol as LetExportSymbol;
 use Zephir\Statements\Let\ExportSymbolString as LetExportSymbolString;
+use Zephir\Expression\Builder\BuilderFactory;
+use Zephir\Expression\Builder\Operators\AssignVariableOperator;
+use Zephir\Expression\Builder\Operators\BinaryOperator;
 
 /**
  * LetStatement
@@ -98,6 +101,12 @@ public function compile(CompilationContext $compilationContext)
              * Incr/Decr assignments don't require an expression
              */
             if (isset($assignment['expr'])) {
+                /**
+                 * Replace on direct-assignment if this bitwise-assignment
+                 * @Todo: Replace on supported native bitwise-assignment
+                 */
+                $assignment = $this->replaceAssignBitwiseOnDirect($assignment);
+
                 $expr = new Expression($assignment['expr']);
 
                 switch ($assignment['assign-type']) {
@@ -249,4 +258,52 @@ public function compile(CompilationContext $compilationContext)
             }
         }
     }
+
+    /**
+     * @param $assignment
+     * @return mixed
+     * @throws CompilerException
+     */
+    protected function replaceAssignBitwiseOnDirect($assignment)
+    {
+        switch ($assignment['operator']) {
+            case AssignVariableOperator::OPERATOR_BITWISE_AND:
+                $operator = BinaryOperator::OPERATOR_BITWISE_AND;
+                break;
+
+            case AssignVariableOperator::OPERATOR_BITWISE_OR:
+                $operator = BinaryOperator::OPERATOR_BITWISE_OR;
+                break;
+
+            case AssignVariableOperator::OPERATOR_BITWISE_XOR:
+                $operator = BinaryOperator::OPERATOR_BITWISE_XOR;
+                break;
+
+            case AssignVariableOperator::OPERATOR_BITWISE_SHIFTLEFT:
+                $operator = BinaryOperator::OPERATOR_BITWISE_SHIFT_LEFT;
+                break;
+
+            case AssignVariableOperator::OPERATOR_BITWISE_SHIFTRIGHT:
+                $operator = BinaryOperator::OPERATOR_BITWISE_SHIFT_RIGHT;
+                break;
+
+            default:
+                return $assignment;
+        }
+
+        if ($assignment['assign-type'] != 'variable') {
+            throw new CompilerException("Operator '" . $assignment['operator'] . "' is not supported assign-type: " . $assignment['assign-type']);
+        }
+
+        $builderExpr = BuilderFactory::getInstance();
+
+        $leftExpression = $builderExpr->variable($assignment['variable']);
+
+        $assignment['expr'] = $builderExpr->operators()
+            ->binary($operator, $leftExpression, $builderExpr->raw($assignment['expr']))
+            ->build();
+
+        $assignment['operator'] = AssignVariableOperator::OPERATOR_ASSIGN;
+        return $assignment;
+    }
 }