feat(php): 实现PHP编译器对引用参数的支持

- 修改CompilerBase.php以支持函数引用参数的正确处理
- 添加Reflection::isReferenceArg方法用于检查函数参数是否为引用类型
- 在处理函数调用时针对引用参数创建临时变量并正确传递引用
- 扩展支持对象属性获取作为引用参数的功能
- 添加iterators_006.phpt和iterators_007.phpt测试用例验证迭代器功能
- 添加ref_prop.php示例文件展示引用属性功能
- 重构多个算法示例文件以改进代码结构和可读性

examples/ref_prop.php

@@ -0,0 +1,7 @@
+<?php
+$o = new StdClass();
+$o->a = 1999;
+parse_str("c=2000", $o->a);
+$prop = $o->a;
+$prop = 111;
+var_dump($o->a);

src/Php/CompilerBase.php

@@ -1402,17 +1402,20 @@ class CompilerBase extends \PhpAot\Core\Translator
                 if (!$this->hasVar($name)) {
                     $this->addLocalVar($name, self::TYPE_REF);
                     $this->beforeStmtLines[] = $name . ' = php::newReference();';
-                } elseif (!$nativeFunction and $funcName) {
+                } elseif (!$nativeFunction and $funcName and Reflection::isReferenceArg($funcName, $i)) {
-                    $funcArg = Reflection::getFunctionParameter($funcName, $i);
                     // 需要引用类型的参数，使用临时变量作为引用，并替换掉实际的参数
-                    if ($funcArg and $funcArg->isPassedByReference()) {
+                    $tmpVar = $this->genTmpVarName();
-                        $tmpVar = $this->genTmpVarName();
+                    $this->addLocalVar($tmpVar, self::TYPE_REF);
-                        $this->addLocalVar($tmpVar, self::TYPE_REF);
+                    $this->beforeStmtLines[] = $tmpVar . ' = ' . $this->parseExpr($arg->value) . '.toReference();';
-                        $this->beforeStmtLines[] = $tmpVar . ' = ' . $this->parseExpr($arg->value) . '.toReference();';
+                    $this->afterStmtLines[] = $name . ' = *' . $tmpVar . ';';
-                        $this->afterStmtLines[] = $name . ' = *' . $tmpVar . ';';
+                    $list_args[] = $tmpVar;
-                        $list_args[] = $tmpVar;
+                    continue;
-                        continue;
+                }
-                    }
+            } elseif ($this->isPropertyFetch($arg->value)) {
+                if (!$nativeFunction and $funcName and Reflection::isReferenceArg($funcName, $i)) {
+                    $obj = $this->parseIdentifier($arg->value->var);
+                    $list_args[] = $obj . '.getPropertyReference(' . $this->identifierToStr($arg->value->name) . ')';
+                    continue;
                 }
             }
             // 不支持变长参数展开的语法，例如：array_merge(...$arr)

src/Php/Reflection.php

@@ -52,4 +52,13 @@ class Reflection
         }
         return $args[$index];
     }
+
+    public static function isReferenceArg(string $fn, int $index): ?string
+    {
+        $param = self::getFunctionParameter($fn, $index);
+        if (!$param) {
+            return null;
+        }
+        return $param->isPassedByReference() ? $param->getName() : null;
+    }
 }

tests/core/classes/iterators_006.phpt

@@ -0,0 +1,85 @@
+--TEST--
+ZE2 iterators and array wrapping
+--FILE--
+<?php
+
+class ai implements Iterator {
+
+    private $array;
+    private $key;
+    private $current;
+
+    function __construct() {
+        $this->array = array('foo', 'bar', 'baz');
+    }
+
+    function rewind(): void {
+        reset($this->array);
+        $this->next();
+    }
+
+    function valid(): bool {
+        return $this->key !== NULL;
+    }
+
+    function key(): mixed {
+        return $this->key;
+    }
+
+    function current(): mixed {
+        return $this->current;
+    }
+
+    function next(): void {
+        $this->key = key($this->array);
+        $this->current = current($this->array);
+        next($this->array);
+    }
+}
+
+class a implements IteratorAggregate {
+
+    public function getIterator(): Traversable {
+        return new ai();
+    }
+}
+
+function main() {
+    $array = new a();
+
+    foreach ($array as $property => $value) {
+        print "$property: $value\n";
+    }
+
+    #$array = $array->getIterator();
+    #$array->rewind();
+    #$array->valid();
+    #var_dump($array->key());
+    #var_dump($array->current());
+    echo "===2nd===\n";
+
+    $array = new ai();
+
+    foreach ($array as $property => $value) {
+        print "$property: $value\n";
+    }
+
+    echo "===3rd===\n";
+
+    foreach ($array as $property => $value) {
+        print "$property: $value\n";
+    }
+}
+?>
+--EXPECT--
+0: foo
+1: bar
+2: baz
+===2nd===
+0: foo
+1: bar
+2: baz
+===3rd===
+0: foo
+1: bar
+2: baz

tests/core/classes/iterators_007.phpt

@@ -0,0 +1,41 @@
+--TEST--
+ZE2 iterators and exceptions
+--FILE--
+<?php
+class Test implements Iterator
+{
+    public $arr = array(1, 2, 3);
+    public $x = 0;
+
+    public function rewind(): void    { if ($this->x == 0) throw new Exception(__METHOD__); reset($this->arr); }
+    public function current(): mixed   { if ($this->x == 1) throw new Exception(__METHOD__); return current($this->arr); }
+    public function key(): mixed       { if ($this->x == 2) throw new Exception(__METHOD__); return key($this->arr); }
+    public function next(): void      { if ($this->x == 3) throw new Exception(__METHOD__); next($this->arr); }
+    public function valid(): bool     { if ($this->x == 4) throw new Exception(__METHOD__); return (key($this->arr) !== NULL); }
+}
+function main() {
+    $t = new Test();
+    while($t->x < 5)
+    {
+        try
+        {
+            foreach($t as $k => $v)
+            {
+                echo "Current\n";
+            }
+        }
+        catch(Exception $e)
+        {
+            echo "Caught in " . $e->getMessage() . "()\n";
+        }
+        $t->x++;
+    }
+}
+?>
+--EXPECT--
+Caught in Test::rewind()
+Caught in Test::current()
+Caught in Test::key()
+Current
+Caught in Test::next()
+Caught in Test::valid()