feat(php): 添加对 trait 魔术常量 __TRAIT__ 的支持

- 在 CompilerBase 中添加 Scalar_MagicConst_Trait 的解析支持
- 为 __TRAIT__ 常量实现作用域检查逻辑
- 为 __CLASS__ 常量添加 trait 环境下的返回逻辑
- 在 Preprocessor 中添加类属性钩子不支持的错误提示
- 添加 trait 魔术常量的功能测试用例
- 更新 trait 示例代码以展示魔术常量使用

examples/property-hook.php

@@ -0,0 +1,24 @@
+<?php
+class Example
+{
+    private bool $modified = false;
+
+    public string $foo = 'default value' {
+        get {
+            if ($this->modified) {
+                return $this->foo . ' (modified)';
+            }
+            return $this->foo;
+        }
+        set(string $value) {
+            $this->foo = strtolower($value);
+            $this->modified = true;
+        }
+    }
+}
+
+function main()
+{
+    $example = new Example();
+    $example->foo = 'Hello World';
+}

examples/trait.php

@@ -3,6 +3,8 @@
 trait TraitA {
     public function sayHello() {
         echo 'Hello';
+        var_dump(__TRAIT__);
+        var_dump(__CLASS__);
     }
 }
 
@@ -24,5 +26,8 @@ class MyHelloWorld
     }
 }
 
+function main()
+{
     $obj = new MyHelloWorld();
     $obj->sayHelloWorld();
+}

src/Php/CompilerBase.php

@@ -478,6 +478,7 @@ class CompilerBase extends \PhpAot\Core\Translator
             case 'Scalar_MagicConst_Function':
             case 'Scalar_MagicConst_Method':
             case 'Scalar_MagicConst_Class':
+            case 'Scalar_MagicConst_Trait':
                 return $this->parseMagicConst($expr);
             case 'Scalar_InterpolatedString':
                 return $this->parseInterpolatedString($expr);
@@ -3472,6 +3473,17 @@ class CompilerBase extends \PhpAot\Core\Translator
             case 'Scalar_MagicConst_Function':
                 return '"' . $this->escapeString($function) . '"';
             case 'Scalar_MagicConst_Class':
+                if (!$this->classDef) {
+                    $this->fatalError($expr, 'The magic constant `__CLASS__` is not allowed in global scope');
+                }
+                if ($this->classDef->trait) {
+                    return Symbol::getCalledClass();
+                }
+                return '"' . $this->escapeString($class) . '"';
+            case 'Scalar_MagicConst_Trait':
+                if (!$this->classDef or !$this->classDef->trait) {
+                    $this->fatalError($expr, 'The magic constant `__TRAIT__` is not allowed in global scope');
+                }
                 return '"' . $this->escapeString($class) . '"';
             case 'Scalar_MagicConst_Method':
                 return '"' . $this->escapeString($class) . '::' . $this->escapeString($this->method) . '"';

src/Php/Preprocessor.php

@@ -546,6 +546,9 @@ class Preprocessor extends CompilerBase
 
     protected function parseClassPropertyDef(Node\Stmt\Property $v): void
     {
+        if ($v->hooks and count($v->hooks) > 0) {
+            $this->fatalError($v, 'The class property hooks are not supported');
+        }
         $oriCtx = $this->context;
         $this->context = $this->classDef->propertyContext;
         $flags = $this->parseModifiers($v->flags);

tests/aot/trait/magic-const.phpt

@@ -0,0 +1,28 @@
+--TEST--
+trait full class name
+--FILE--
+<?php
+trait TraitA {
+    public function sayHello() {
+        var_dump(__TRAIT__);
+        var_dump(__CLASS__);
+    }
+}
+
+class MyHelloWorld
+{
+    use TraitA;
+    public function sayHelloWorld() {
+        $this->sayHello();
+    }
+}
+
+function main()
+{
+    $obj = new MyHelloWorld();
+    $obj->sayHelloWorld();
+}
+?>
+--EXPECT--
+string(6) "TraitA"
+string(12) "MyHelloWorld"