diff --git a/examples/EightQueue.php b/examples/EightQueue.php
new file mode 100644
index 00000000..22872c26
--- /dev/null
+++ b/examples/EightQueue.php
@@ -0,0 +1,123 @@
+<?php
+
+
+class EightQueensOptimized
+{
+    private $solutions = [];
+    private $n = 8;
+    private $cols = [];      // 记录每行皇后的列位置
+
+    public function __construct($n = 8)
+    {
+        $this->n = $n;
+        $this->cols = array_fill(0, $n, -1);
+    }
+
+    /**
+     * 检查在 (row, col) 位置放置皇后是否安全
+     */
+    private function isSafe($row, $col)
+    {
+        for ($i = 0; $i < $row; $i++) {
+            // 检查列冲突和对角线冲突
+            if ($this->cols[$i] == $col ||
+                abs($this->cols[$i] - $col) == abs($i - $row)) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    /**
+     * 回溯求解
+     */
+    private function solve($row)
+    {
+        if ($row == $this->n) {
+            $this->solutions[] = array_slice($this->cols, 0);
+            return;
+        }
+
+        for ($col = 0; $col < $this->n; $col++) {
+            if ($this->isSafe($row, $col)) {
+                $this->cols[$row] = $col;
+                $this->solve($row + 1);
+                $this->cols[$row] = -1;
+            }
+        }
+    }
+
+    /**
+     * 获取所有解决方案
+     */
+    public function getSolutions()
+    {
+        $this->solutions = [];
+        $this->solve(0);
+        return $this->solutions;
+    }
+
+    /**
+     * 打印解决方案
+     */
+    public function printSolution($solution)
+    {
+        echo str_repeat('-', $this->n * 4 + 1) . "\n";
+        for ($row = 0; $row < $this->n; $row++) {
+            echo '| ';
+            for ($col = 0; $col < $this->n; $col++) {
+                echo ($solution[$row] == $col ? 'Q' : '.') . ' | ';
+            }
+            echo "\n" . str_repeat('-', $this->n * 4 + 1) . "\n";
+        }
+    }
+
+    /**
+     * 打印所有解决方案
+     */
+    public function printAllSolutions()
+    {
+        $solutions = $this->getSolutions();
+        echo "找到 " . count($solutions) . " 个解决方案\n\n";
+
+        foreach ($solutions as $index => $solution) {
+            echo "解决方案 #" . ($index + 1) . ": [" .
+                implode(', ', $solution) . "]\n";
+            $this->printSolution($solution);
+            echo "\n";
+        }
+    }
+
+    /**
+     * 只统计解的数量（不保存所有解）
+     */
+    public function countSolutions()
+    {
+        return count($this->getSolutions());
+    }
+}
+
+function main()
+{
+    // 使用示例
+    echo "=== 8 皇后问题 ===\n\n";
+    $queens = new EightQueensOptimized(8);
+
+    // 只显示前3个解决方案
+    $solutions = $queens->getSolutions();
+    echo "总共找到 " . count($solutions) . " 个解决方案\n\n";
+
+    for ($i = 0; $i < min(3, count($solutions)); $i++) {
+        echo "解决方案 #" . ($i + 1) . ":\n";
+        $queens->printSolution($solutions[$i]);
+        echo "\n";
+    }
+
+// 测试不同规模
+    echo "\n=== 不同规模的皇后问题 ===\n";
+    for ($n = 4; $n <= 10; $n++) {
+        $q = new EightQueensOptimized($n);
+        $count = $q->countSolutions();
+        echo "{$n} 皇后问题有 {$count} 个解\n";
+    }
+}
diff --git a/src/Php/CompilerBase.php b/src/Php/CompilerBase.php
index a74741b9..e0b22f73 100644
--- a/src/Php/CompilerBase.php
+++ b/src/Php/CompilerBase.php
@@ -429,6 +429,7 @@ class CompilerBase extends \PhpAot\Core\Translator
             $class = $v->getType();
             $this->beforeStmtLines = [];
             $this->afterStmtLines = [];
+            $result = '';
             $this->writeLog('Line ' . $this->getLine($v) . ': ' . $class);
 
             $lines[] = $this->getComment($v, $class);
@@ -483,7 +484,6 @@ class CompilerBase extends \PhpAot\Core\Translator
                     $result = $this->parseContinue($v);
                     break;
                 case 'Stmt_Nop':
-                    $result = '';
                     break;
                 case 'Stmt_Global':
                     $result = $this->parseGlobal($v);
@@ -505,9 +505,13 @@ class CompilerBase extends \PhpAot\Core\Translator
             }
             $lines = array_merge($lines, $this->beforeStmtLines);
             $this->beforeStmtLines = [];
-            $lines[] = $result;
-            $lines = array_merge($lines, $this->afterStmtLines);
-            $this->afterStmtLines = [];
+            if ($result) {
+                $lines[] = $result;
+            }
+            if ($this->afterStmtLines) {
+                $lines = array_merge($lines, $this->afterStmtLines);
+                $this->afterStmtLines = [];
+            }
         }
 
         $code = '';
@@ -694,6 +698,20 @@ class CompilerBase extends \PhpAot\Core\Translator
         }
     }
 
+    private function parseAssignPropertyArrayDim(Node $left, Node $right): string
+    {
+        $obj = $this->parseIdentifier($left->var->var);
+        $propName = $this->identifierToStr($left->var->name);
+        $code = '';
+        $value = $this->trimBrackets($this->parseExpr($right));
+        if ($left->dim === null) {
+            return $code . "$obj.appendArrayProperty($propName, $value)";
+        } else {
+            $dim = $this->trimBrackets($this->parseIdentifier($left->dim));
+            return $code . "$obj.updateArrayProperty($propName, $dim, $value)";
+        }
+    }
+
     protected function parseAssign(Node $v): string
     {
         $left = $v->var;
@@ -707,6 +725,11 @@ class CompilerBase extends \PhpAot\Core\Translator
                 $this->addLocalVar($array, self::TYPE_ARRAY);
             }
 
+            // 这是属性赋值操作
+            if ($this->isPropertyFetch($left->var)) {
+                return $this->parseAssignPropertyArrayDim($left, $right);
+            }
+
             $value = $this->trimBrackets($this->parseExpr($right));
             if ($left->dim === null) {
                 return $code . "$array.offsetSet(php::null, $value)";
@@ -1291,6 +1314,13 @@ class CompilerBase extends \PhpAot\Core\Translator
         exit(255);
     }
 
+    protected function dump(NodeAbstract $v): void
+    {
+        if ($this->debugLine == $v->getStartLine()) {
+            var_dump($v);
+        }
+    }
+
     protected function parseArrayDimFetch($node): string
     {
         $var = $this->parseIdentifier($node->var);
diff --git a/src/Php/Preprocessor.php b/src/Php/Preprocessor.php
index ae554aab..970d8139 100644
--- a/src/Php/Preprocessor.php
+++ b/src/Php/Preprocessor.php
@@ -103,6 +103,7 @@ class Preprocessor extends CompilerBase
                     $this->prepareNamespaceDef($v);
                     break;
                 case 'Stmt_Class':
+                case 'Stmt_Trait':
                     $this->prepareClass($v);
                     break;
                 case 'Stmt_Function':
@@ -146,7 +147,7 @@ class Preprocessor extends CompilerBase
     }
 
 
-    protected function prepareClass(Node\Stmt\Class_ $class): string
+    protected function prepareClass(Node\Stmt\Class_|Node\Stmt\Trait_ $class): string
     {
         $this->class = $this->parseIdentifier($class->name);
         $code = '';
@@ -156,6 +157,7 @@ class Preprocessor extends CompilerBase
                 case 'Stmt_ClassConst':
                 case 'Stmt_Property':
                 case 'Stmt_Nop':
+                case 'Stmt_TraitUse':
                     break;
                 case 'Stmt_ClassMethod':
                     $code .= $this->prepareFunction($v) . PHP_EOL;
diff --git a/src/Php/Translator.php b/src/Php/Translator.php
index 49a7b877..c9ddf173 100644
--- a/src/Php/Translator.php
+++ b/src/Php/Translator.php
@@ -218,6 +218,7 @@ class Translator extends Preprocessor
                     $cppCode .= $this->parseNamespace($v);
                     break;
                 case 'Stmt_Class':
+                case 'Stmt_Trait':
                     $cppCode .= $this->parseClass($v);
                     break;
                 case 'Stmt_Use':
@@ -494,7 +495,7 @@ class Translator extends Preprocessor
         return $code;
     }
 
-    protected function genClassStubFile(Node\Stmt\Class_ $class, string $file): void
+    protected function genClassStubFile(Node\Stmt\Class_|Node\Stmt\Trait_ $class, string $file): void
     {
         $genStubCmd = PHP_BINARY. ' ' . $this->rootPath . '/bin/gen_stub.php --gen-class-info -f ' . $file;
         $output = shell_exec($genStubCmd);
@@ -509,7 +510,7 @@ class Translator extends Preprocessor
         $this->stubFileIncluded = true;
     }
 
-    protected function parseClass(Node\Stmt\Class_ $class): string
+    protected function parseClass(Node\Stmt\Class_|Node\Stmt\Trait_ $class): string
     {
         $this->class = $this->parseIdentifier($class->name);
         if (!$this->stubFileIncluded) {