feat(compiler): 支持PHP变长参数展开语法

- 修改parseCallArgs方法以支持...操作符参数展开
- 添加对变长参数展开位置限制的验证逻辑
- 实现变长参数展开的临时变量生成机制
- 更新函数调用参数解析以兼容数组参数传递
- 添加parseArrayArg辅助方法处理数组参数解析
- 为变长参数展开功能增加单元测试用例
- 修复多处函数调用参数格式化问题

examples/vcall.php

@@ -0,0 +1,9 @@
+<?php
+function main()
+{
+    $a = 100;
+    $b = 'hello';
+    $c = [12.34, true, null];
+
+    var_dump($a, $b, ...$c);
+}

src/Php/CompilerBase.php

@@ -1956,7 +1956,7 @@ class CompilerBase extends \PhpAot\Core\Translator
         if (empty($expr->args)) {
             return $call . '(' . $fn . ')';
         }
-        return $call . '(' . $fn . ', {' . $this->parseCallArgs($expr->args, $name) . '})';
+        return $call . '(' . $fn . ', ' . $this->parseCallArgs($expr->args, $name) . ')';
     }
 
     protected function parseNativeCallArgs(array $callArgs, string $nativeFunc): string
@@ -2005,6 +2005,7 @@ class CompilerBase extends \PhpAot\Core\Translator
     protected function parseCallArgs(array $args, string $funcName = '', string $className = ''): string
     {
         $list_args = [];
+        $last = array_key_last($args);
         foreach ($args as $i => $arg) {
             if ($arg->name !== null) {
                 $this->fatalError($arg, 'Named arguments are not supported');
@@ -2050,21 +2051,42 @@ class CompilerBase extends \PhpAot\Core\Translator
                     continue;
                 }
             }
-            // 不支持变长参数展开的语法，例如：array_merge(...$arr)
+            // 变长参数展开的语法，例如：array_merge(...$arr)
             if ($arg->unpack) {
-                $this->fatalError($arg, 'The syntax for variable parameter expansion is not supported');
+                if ($i !== $last) {
+                    $this->fatalError($arg, 'The unpack expression for variadic arguments must be the last');
+                }
+                $tmpVar = $this->genTmpVarName();
+                $this->beforeStmtLines[] = self::TYPE_ARRAY . ' ' . $tmpVar . '{' . implode(', ', $list_args) . '};';
+                $this->beforeStmtLines[] = $tmpVar . '.merge(' . $this->parseArrayArg($arg) . ');';
+                return $tmpVar;
             }
             $list_args[] = $this->parseArg($arg);
         }
 
-        return implode(', ', $list_args);
+        return '{' . implode(', ', $list_args) . '}';
     }
 
-    protected function parseArg($arg): string
+    protected function parseArg(Node\Arg $arg): string
     {
         return $this->parseIdentifier($arg->value);
     }
 
+    protected function parseArrayArg(Node\Arg $expr): string
+    {
+        $value = $expr->value;
+        if ($this->isVarExpr($value)) {
+            $var = $this->parseIdentifier($value);
+            if (!$this->hasVar($var)) {
+                $this->errorUndefinedVariable($value);
+            }
+            if ($this->getVarType($var) === self::TYPE_ARRAY) {
+                return $var;
+            }
+        }
+        return $this->parseExpr($value);
+    }
+
     protected function parsePostOp($expr, string $op): string
     {
         if ($this->isVarExpr($expr->var) or $this->isPropertyFetch($expr->var) or $this->isArrayDimFetch($expr->var)) {
@@ -2448,7 +2470,7 @@ class CompilerBase extends \PhpAot\Core\Translator
         if (empty($args)) {
             return 'php::newObject(' . $cePtr . ')';
         }
-        return 'php::newObject(' . $cePtr . ', {' . $this->parseCallArgs($args) . '})';
+        return 'php::newObject(' . $cePtr . ', ' . $this->parseCallArgs($args) . ')';
     }
 
     protected function parseClone(Node\Expr\Clone_ $expr): string
@@ -3198,7 +3220,7 @@ class CompilerBase extends \PhpAot\Core\Translator
         if (empty($expr->args)) {
             return $object . '.exec(' . $method . ')';
         }
-        return $object . '.exec(' . $method . ', {' . $this->parseCallArgs($expr->args, $funcName, $class) . '})';
+        return $object . '.exec(' . $method . ', ' . $this->parseCallArgs($expr->args, $funcName, $class) . ')';
     }
 
     protected function identifierToStr(NodeAbstract $node, bool $require = true): string
@@ -3268,7 +3290,7 @@ class CompilerBase extends \PhpAot\Core\Translator
         if (empty($expr->args)) {
             return $call . '(' . $fn . ')';
         }
-        return $call . '(' . $fn . ', {' . $this->parseCallArgs($expr->args) . '})';
+        return $call . '(' . $fn . ', ' . $this->parseCallArgs($expr->args) . ')';
     }
 
     protected function findNativeStaticProperty(Node\Expr\StaticPropertyFetch $expr, ?string &$class, ?string &$namespace): ?PropertyDef
@@ -3655,7 +3677,7 @@ class CompilerBase extends \PhpAot\Core\Translator
         if (empty($expr->args)) {
             return 'this_.callParentMethod(' . $method . ')';
         }
-        return 'this_.callParentMethod(' . $method . ', {' . $this->parseCallArgs($expr->args) . '})';
+        return 'this_.callParentMethod(' . $method . ', ' . $this->parseCallArgs($expr->args) . ')';
     }
 
     protected function genDebugInfo(?NodeAbstract $stmt = null): string

src/cpp/php_aot_helper.h

@@ -4,18 +4,26 @@ extern zend_class_entry *php_get_class(int class_id, const php::Str &class_name)
 extern zend_function *php_get_func(int func_id, const php::Str &func_name);
 extern zend_function *php_get_method(int func_id, const php::Str &method_name, int class_id, const php::Str &class_name);
 
+static inline php::Variant CALL(int func_id, const php::Str &func_name) {
+    return php::call(php_get_func(func_id, func_name));
+}
+
 static inline php::Variant CALL(int func_id, const php::Str &func_name, const php::ArgList &args) {
     return php::call(php_get_func(func_id, func_name), args);
 }
 
-static inline php::Variant CALL(int func_id, const php::Str &func_name) {
-    return php::call(php_get_func(func_id, func_name));
+static inline php::Variant CALL(int func_id, const php::Str &func_name, php::Array &args) {
+    return php::call(php_get_func(func_id, func_name), args);
+}
+
+static inline php::Variant CALL_SILENT(int func_id, const php::Str &func_name) {
+    return php::silentCall(php_get_func(func_id, func_name));
 }
 
 static inline php::Variant CALL_SILENT(int func_id, const php::Str &func_name, const php::ArgList &args) {
     return php::silentCall(php_get_func(func_id, func_name), args);
 }
 
-static inline php::Variant CALL_SILENT(int func_id, const php::Str &func_name) {
-    return php::silentCall(php_get_func(func_id, func_name));
+static inline php::Variant CALL_SILENT(int func_id, const php::Str &func_name, php::Array &args) {
+    return php::call(php_get_func(func_id, func_name), args);
 }

tests/aot/args-unpack.phpt

@@ -0,0 +1,18 @@
+--TEST--
+args unpack
+--FILE--
+<?php
+function main()
+{
+    $a = 100;
+    $b = 'hello';
+    $c = [12.34, true, null];
+    var_dump($a, $b, ...$c);
+}
+?>
+--EXPECT--
+int(100)
+string(5) "hello"
+float(12.34)
+bool(true)
+NULL