refactor(parser): 重构赋值操作符解析逻辑并调整测试文件结构

- 调整 AssignOpTrait.php 中变量解析顺序，优化代码执行流程
- 将 inAssignExpr 上下文切换移到属性写入检查之后
- 移除比较操作符测试文件中的太空船操作符测试用例
- 创建独立的太空船操作符测试文件 spaceship.phpt
- 重新组织测试用例结构以提高可维护性

src/Php/Parser/AssignOpTrait.php

@@ -142,20 +142,20 @@ trait AssignOpTrait
             return $this->parseAssignToList($left, $right);
         }
 
-        $oriInAssignExpr = $this->context->inAssignExpr;
-        $this->context->inAssignExpr = true;
-        $var = $this->parseIdentifier($left);
-        $this->context->inAssignExpr = $oriInAssignExpr;
         $propertyWriteTarget = $this->preparePropertyWriteTarget($left);
-        if ($var === 'this_') {
-            $this->fatalError($left, 'Cannot re-assign $this');
-        }
         $finalVarType = $type = $this->detectTypeOfExpr($right);
         if ($type === self::TYPE_VOID) {
             $finalVarType = $type = self::TYPE_VAR;
         }
 
         if ($this->isVarExpr($left)) {
+            $oriInAssignExpr = $this->context->inAssignExpr;
+            $this->context->inAssignExpr = true;
+            $var = $this->parseIdentifier($left);
+            $this->context->inAssignExpr = $oriInAssignExpr;
+            if ($var === 'this_') {
+                $this->fatalError($left, 'Cannot re-assign $this');
+            }
             if ($this->isStdContainer($var)) {
                 $copyAssign = $this->parseStdContainerCopyAssign($var, $right);
                 if ($copyAssign !== null) {
@@ -274,6 +274,10 @@ trait AssignOpTrait
             $this->assertCanAssignPropertyWrite($propertyWriteTarget, $right);
         }
 
+        $oriInAssignExpr = $this->context->inAssignExpr;
+        $this->context->inAssignExpr = true;
+        $var = $this->parseIdentifier($left);
+        $this->context->inAssignExpr = $oriInAssignExpr;
         $rightExpr = $this->parseAssignRightExpr($right);
         if ($propertyWriteTarget !== null) {
             $rightExpr = $this->wrapPropertyWriteTypeCheck($propertyWriteTarget, $right, $rightExpr);

tests/aot/operator/comparison_operators.phpt

@@ -47,16 +47,6 @@ $int_num = 10;
 var_dump($str_num == $int_num); // true (loose comparison)
 var_dump($str_num === $int_num); // false (strict comparison)
 
-// Test spaceship operator (PHP 7+)
-$spaceship1 = 5 <=> 10; // -1
-var_dump($spaceship1);
-
-$spaceship2 = 10 <=> 10; // 0
-var_dump($spaceship2);
-
-$spaceship3 = 15 <=> 10; // 1
-var_dump($spaceship3);
-
 // Test comparisons with strings
 $str1 = "apple";
 $str2 = "banana";
@@ -149,9 +139,6 @@ bool(true)
 bool(false)
 bool(true)
 bool(false)
-int(-1)
-int(0)
-int(1)
 bool(true)
 bool(true)
 bool(false)

tests/aot/operator/spaceship.phpt

@@ -0,0 +1,18 @@
+--TEST--
+assign compare
+--FILE--
+<?php
+// Test spaceship operator (PHP 7+)
+$spaceship1 = 5 <=> 10; // -1
+var_dump($spaceship1);
+
+$spaceship2 = 10 <=> 10; // 0
+var_dump($spaceship2);
+
+$spaceship3 = 15 <=> 10; // 1
+var_dump($spaceship3);
+?>
+--EXPECT--
+int(-1)
+int(0)
+int(1)