refactor(closure): 移除闭包生成器中的当前作用域参数

- 移除了 genClosure 方法中的 $useCurrentScope 参数
- 简化了闭包捕获逻辑，统一使用默认捕获方式
- 移除了条件性的上下文切换逻辑
- 简化了变量引用处理逻辑
- 在箭头函数解析中添加了变量查找和 use 子句生成功能
- 修复了闭包参数引用检查和变量作用域处理

src/Php/CompilerBase.php

@@ -34,6 +34,7 @@ use PhpParser\Node\Scalar\MagicConst;
 use PhpParser\Node\Stmt\Foreach_;
 use PhpParser\Node\UnionType;
 use PhpParser\NodeAbstract;
+use PhpParser\NodeFinder;
 use PhpParser\Parser;
 use PhpParser\ParserFactory;
 use PhpParser\PrettyPrinter;
@@ -4300,6 +4301,27 @@ class CompilerBase extends \PhpAot\Core\Translator
 
     protected function parseArrowFunction(Node\Expr\ArrowFunction $expr): string
     {
+        $nodeFinder = new NodeFinder();
+        $vars = $nodeFinder->findInstanceOf($expr->expr, Node\Expr\Variable::class);
+        $uses = [];
+        $params = [];
+
+        foreach ($expr->params as $i => $param) {
+            if ($param->byRef) {
+                $this->fatalError($expr, 'Closure cannot use reference parameter');
+            }
+            if ($param->var instanceof Node\Expr\Variable) {
+                $params[$param->var->name] = $i;
+            }
+        }
+
+        foreach ($vars as $var) {
+            if ($var->name === 'this' or !$this->hasLocalVar($var->name) or isset($params[$var->name])) {
+                continue;
+            }
+            $uses[] = new Node\ClosureUse($var);
+        }
+
         $cb = function () use ($expr) {
             $code = $this->parseExpr($expr->expr);
             if ($this->context->beforeStmtLines) {
@@ -4315,7 +4337,8 @@ class CompilerBase extends \PhpAot\Core\Translator
             }
             return $beforeCode . PHP_EOL . 'return ' . $code . ';';
         };
-        return $this->genClosure($expr, $expr->params, $cb, [], true);
+
+        return $this->genClosure($expr, $expr->params, $cb, $uses);
     }
 
     protected function parseClosure(Node\Expr\Closure $expr): string

src/Php/Generator/ClosureGenerator.php

@@ -22,29 +22,25 @@ trait ClosureGenerator
     }
 
     /**
-     * @param $useCurrentScope bool 直接使用当前作用域，C++ 函数将使用 & 捕获所有闭包变量
+     * @param NodeAbstract $expr
+     * @param array $params
+     * @param callable $bodyGenCb
+     * @param array $uses
+     * @return string
      */
-    protected function genClosure(NodeAbstract $expr, array $params, callable $bodyGenCb, array $uses = [], bool $useCurrentScope = false): string
+    protected function genClosure(NodeAbstract $expr, array $params, callable $bodyGenCb, array $uses = []): string
     {
         $tmpVar = $this->genTmpVarName();
-        // 必须使用 = 捕获，不能使用 & ，否则可能会出现悬空指针
-        // 在 PHP 中 = 赋值是浅拷贝，仅增加一次引用计数，和 zval (16 字节) 封装的赋值
-        $capture = $useCurrentScope ? '&' : '';
 
         $code = $this->getIndent() .
-            'php::ClosureFn ' . $tmpVar . ' = [' . $capture . ']('
+            'php::ClosureFn ' . $tmpVar . ' = []('
             . 'INTERNAL_FUNCTION_PARAMETERS, '
             . self::TYPE_OBJECT . ' &this_, '
             . self::TYPE_ARGS . ' &vars_) ' .
             '-> ' . self::TYPE_VAR . ' {' . PHP_EOL;
 
         $oriContext = $this->context;
-        if ($useCurrentScope) {
-            $oriBeforeStmtLines = $oriContext->beforeStmtLines;
-            $oriAfterStmtLines = $oriContext->afterStmtLines;
-        } else {
-            $this->context = new FunctionContext();
-        }
+        $this->context = new FunctionContext();
 
         $this->context->inClosure = true;
         $this->indentLevel++;
@@ -83,14 +79,8 @@ trait ClosureGenerator
                 }
                 if ($useItem->byRef) {
                     // 闭包的 use 语法，若为引用类型，可以就地创建变量
-                    if ($useCurrentScope) {
-                        if (!$this->hasVar($var)) {
-                            $this->addLocalVar($var, self::TYPE_REF);
-                        }
-                    } else {
-                        if (!isset($oriContext->localVars[$var])) {
-                            $oriContext->localVars[$var] = self::TYPE_REF;
-                        }
+                    if (!isset($oriContext->localVars[$var])) {
+                        $oriContext->localVars[$var] = self::TYPE_REF;
                     }
                     $useVars[] = $this->convertToRef($useItem->var);
                 } else {
@@ -103,10 +93,6 @@ trait ClosureGenerator
         }
 
         $this->context = $oriContext;
-        if ($useCurrentScope) {
-            $this->context->beforeStmtLines = $oriBeforeStmtLines;
-            $this->context->afterStmtLines = $oriAfterStmtLines;
-        }
         $this->context->beforeStmtLines[] = $code;
 
         if ($this->methodDef) {