refactor(compiler): 替换 std::unsafe_cast 为对象方法调用并优化类型转换

- 将测试文件中的 std::unsafe_cast 调用替换为对应的 toStd* 方法
- 移除 std::unsafe_cast 函数实现，改为使用 $source->toStdMap 等方法
- 更新错误消息输出，移除函数名前缀
- 添加 TO_METHOD_TYPE_MAP 常量定义类型转换方法映射
- 修改变量赋值检查逻辑，支持新的 to* 转换方法
- 移除对 objval 函数的支持，统一使用 toObject 方法
- 新增 parseToStdAssign 方法处理标准容器转换分配
- 添加 genToObjectCall 和 genToConvertCall 代码生成方法
- 重构 UniversalMethodCall 类，移除重复的转换方法定义
- 优化类型检测逻辑，支持新的转换方法类型推断

src/Php/CompilerBase.php

@@ -75,6 +75,21 @@ class CompilerBase extends \PhpAot\Core\Translator
     public const string TYPE_BIGFLOAT = 'php::BigFloat';
     public const string TYPE_BOX = 'php::Box';
 
+    /**
+     * to* conversion methods are keywords with mandated return types. */
+    public const array TO_METHOD_TYPE_MAP = [
+        'toInt'      => self::TYPE_INT,
+        'toFloat'    => self::TYPE_FLOAT,
+        'toString'   => self::TYPE_STR,
+        'toBool'     => self::TYPE_BOOL,
+        'toArray'    => self::TYPE_ARRAY,
+        'toStream'   => self::TYPE_STREAM,
+        'toBigInt'   => self::TYPE_BIGINT,
+        'toBigFloat' => self::TYPE_BIGFLOAT,
+        'toDecimal'  => self::TYPE_DECIMAL,
+        'toObject'   => self::TYPE_OBJECT,
+    ];
+
     private const array STREAM_FUNCTIONS = [
         'fopen',
         'tmpfile',
@@ -1652,7 +1667,7 @@ class CompilerBase extends \PhpAot\Core\Translator
                     $this->addObject($var, $rightClass);
                 } elseif ($this->isTypedObject($var)) {
                     $leftClass = $this->getObjectType($var);
-                    // 对象的类不一致，不能互相赋值，必须使用 objval() 对齐类型
+                    // 对象的类不一致，不能互相赋值，必须使用 toObject() 对齐类型
                     // 注意这里必须使用绝对相等比较，即使存在继承关系，类的方法也可能不一致
                     if ($leftClass !== $rightClass) {
                         $this->fatalError($left, "Cannot re-assign typed object `\${$var}` from `{$leftClass}` to `{$rightClass}`");
@@ -1661,6 +1676,18 @@ class CompilerBase extends \PhpAot\Core\Translator
                     $this->checkVarAssignExpr($left, $this->getVarType($var), self::TYPE_OBJECT);
                 }
             } else {
+                if ($this->isMethodCall($right) and $this->isNamedMethod($right->name)) {
+                    $methodName = $right->name->toString();
+                    if (in_array($methodName, ['toStdArray', 'toStdVector', 'toStdMap', 'toStdUnorderedMap'], true)) {
+                        if ($this->hasVar($var)) {
+                            $this->fatalError($left, "Cannot re-assign `\${$var}` to {$methodName}()");
+                        }
+                        if ($this->context->scopeLevel > 1) {
+                            $this->fatalError($left, "Must use {$methodName}() in the top-level scope of the function");
+                        }
+                        return $this->parseToStdAssign($var, $right);
+                    }
+                }
                 if ($this->isFuncCallExpr($right) and $this->isNameExpr($right->name)) {
                     $fn = $this->parseIdentifier($right->name);
                     if (count($right->args) === 1 and $fn === 'any') {
@@ -1676,15 +1703,7 @@ class CompilerBase extends \PhpAot\Core\Translator
                 } elseif ($this->isStaticCall($right) and $this->isNameExpr($right->class) and $this->isIdExpr($right->name)) {
                     $class = $this->parseIdentifier($right->class);
                     if ($class === 'std') {
-                        if ($right->name->toString() === 'unsafe_cast') {
-                            if ($this->hasVar($var)) {
-                                $this->fatalError($left, "Cannot re-assign `\${$var}` to std::unsafe_cast()");
-                            }
-                            if ($this->context->scopeLevel > 1) {
-                                $this->fatalError($left, 'Must use std::unsafe_cast() in the top-level scope of the function');
-                            }
-                            return $this->parseStdUnsafeCastAssign($var, $right);
-                        } elseif (in_array($right->name->toString(), ['array', 'vector', 'map', 'unordered_map'], true)) {
+                        if (in_array($right->name->toString(), ['array', 'vector', 'map', 'unordered_map'], true)) {
                             if ($this->hasVar($var)) {
                                 $this->fatalError($left, "Cannot re-assign `\${$var}` to std::{$right->name->toString()}");
                             }
@@ -2035,22 +2054,6 @@ class CompilerBase extends \PhpAot\Core\Translator
                 return $this->getObjectType($object);
             }
         }
-        if ($this->isFuncCallExpr($expr) and $this->isNameExpr($expr->name)) {
-            $fn = $this->parseIdentifier($expr->name);
-            if (count($expr->args) === 2 and $fn === 'objval') {
-                $argClass = $expr->args[1]->value;
-                if ($this->isScalarString($argClass)) {
-                    return $this->getNamespacedClassName($argClass->value);
-                }
-                if ($this->isClassConstFetch($argClass)) {
-                    if ($this->isNameExpr($argClass->class) and $this->isIdExpr($argClass->name) and $this->parseIdentifier($argClass->name) === 'class') {
-                        return $this->getNamespacedClassName($this->parseIdentifier($argClass->class));
-                    }
-                } else {
-                    $this->fatalError($expr, 'The second parameter of objval() function only supports string literals or `ClassName::class` constant');
-                }
-            }
-        }
         if ($this->isArrayDimFetch($expr) and $this->isStdContainerExpr($expr)) {
             if ($this->isStdArrayExpr($expr)) {
                 if (!$expr->hasAttribute('stdArrayDimFetch')) {
@@ -2068,14 +2071,28 @@ class CompilerBase extends \PhpAot\Core\Translator
             $attr = $expr->getAttribute('stdContainerDimFetch');
             return $this->context->stdContainers[$attr['var']]['class'] ?? '';
         }
-        if ($this->isMethodCall($expr) and $this->isVarExpr($expr->var) and $this->isNamedMethod($expr->name)) {
-            $object = $this->parseVariable($expr->var);
-            try {
-                $nativeFunc = $this->findNativeMethod($expr, $object, $this->parseIdentifier($expr->name));
-                if ($nativeFunc) {
-                    return $this->getFunction($nativeFunc)->returnClass;
+        if ($this->isMethodCall($expr) and $this->isNamedMethod($expr->name)) {
+            $method = $this->parseIdentifier($expr->name);
+            if ($method === 'toObject' and !empty($expr->args)) {
+                $argClass = $expr->args[0]->value;
+                if ($this->isScalarString($argClass)) {
+                    return $this->getNamespacedClassName($argClass->value);
+                }
+                if ($this->isClassConstFetch($argClass)) {
+                    if ($this->isNameExpr($argClass->class) and $this->isIdExpr($argClass->name) and $this->parseIdentifier($argClass->name) === 'class') {
+                        return $this->getNamespacedClassName($this->parseIdentifier($argClass->class));
+                    }
+                }
+            }
+            if ($this->isVarExpr($expr->var)) {
+                $object = $this->parseVariable($expr->var);
+                try {
+                    $nativeFunc = $this->findNativeMethod($expr, $object, $method);
+                    if ($nativeFunc) {
+                        return $this->getFunction($nativeFunc)->returnClass;
+                    }
+                } catch (DynamicCall) {
                 }
-            } catch (DynamicCall) {
             }
         }
         if ($this->isStaticCall($expr) and $this->isNameExpr($expr->class) and $this->isNamedMethod($expr->name)) {
@@ -2502,6 +2519,10 @@ class CompilerBase extends \PhpAot\Core\Translator
             case 'Expr_MethodCall':
                 if ($this->isNamedMethod($expr->name)) {
                     $method = $this->parseIdentifier($expr->name);
+                    // to* methods are keywords — their return type is mandated regardless of receiver
+                    if (isset(self::TO_METHOD_TYPE_MAP[$method])) {
+                        return self::TO_METHOD_TYPE_MAP[$method];
+                    }
                     // Class definition resolution (handles this_, typed VarExpr)
                     $classDef = $this->resolveObjectClassDef($expr->var);
                     if ($classDef !== null && $classDef->hasMethod($method)) {
@@ -5376,6 +5397,26 @@ class CompilerBase extends \PhpAot\Core\Translator
         return $left . ' = &' . $tmpVar;
     }
 
+    protected function genToObjectCall(Expr\MethodCall $expr, string $receiver): string
+    {
+        if (empty($expr->args)) {
+            return 'php::toObject(' . $receiver . ')';
+        }
+        $argClass = $expr->args[0]->value;
+        if ($this->isScalarString($argClass)) {
+            $className = $this->getNamespacedClassName($argClass->value);
+        } elseif ($this->isClassConstFetch($argClass)) {
+            if ($this->isNameExpr($argClass->class) and $this->isIdExpr($argClass->name) and $this->parseIdentifier($argClass->name) === 'class') {
+                $className = $this->getNamespacedClassName($this->parseIdentifier($argClass->class));
+            } else {
+                $this->fatalError($expr, 'The first parameter of toObject() only supports string literals or `ClassName::class` constant');
+            }
+        } else {
+            $this->fatalError($expr, 'The first parameter of toObject() only supports string literals or `ClassName::class` constant');
+        }
+        return 'php::toObject(' . $receiver . ', ' . $this->getClassEntryPtr($className) . ', true)';
+    }
+
     protected function parseMethodCall(Expr\MethodCall $expr): string
     {
         $class = '';
@@ -5392,6 +5433,22 @@ class CompilerBase extends \PhpAot\Core\Translator
         $magicMethod = false;
         $method = $this->identifierToStr($expr->name, literal: true);
 
+        // to* conversion methods are language keywords — always dispatched directly
+        if ($this->isNamedMethod($expr->name)) {
+            $methodName = $expr->name->toString();
+            if (isset(self::TO_METHOD_TYPE_MAP[$methodName])) {
+                if ($this->isVarExpr($expr->var)) {
+                    $receiverType = $this->getVarType($object);
+                } else {
+                    $receiverType = $this->detectTypeOfExpr($expr->var);
+                }
+                if ($methodName === 'toObject') {
+                    return $this->genToObjectCall($expr, $object);
+                }
+                return $this->genToConvertCall($object, $methodName, $receiverType);
+            }
+        }
+
         // 可转为原生调用的 MethodCall
         if ($this->isVarExpr($expr->var) and $this->isNamedMethod($expr->name)) {
             $type = $this->getVarType($object);

src/Php/FuncCallOptimizer.php

@@ -87,11 +87,6 @@ trait FuncCallOptimizer
             }
         } elseif (count($expr->args) == 2) {
             switch ($name) {
-                case 'objval':
-                    $arg1 = $expr->args[0]->value;
-                    $arg2 = $expr->args[1]->value;
-                    return $this->convertObjectExpr($this->parseExpr($arg1), $this->parseExpr($arg2));
-
                 case 'define':
                     $arg1 = $expr->args[0]->value;
                     if ($this->isScalarString($arg1) and !$this->isValidDefineName($arg1->value)) {

src/Php/Parser/StdContainerParser.php

@@ -10,6 +10,9 @@ namespace PhpAot\Php\Parser;
 
 use PhpAot\Php\Symbol;
 use PhpParser\Node\Expr;
+use PhpParser\Node\Expr\StaticCall;
+use PhpParser\Node\Name;
+use PhpParser\Node\Identifier;
 use PhpParser\Node\Stmt\Foreach_;
 use PhpParser\NodeAbstract;
 
@@ -589,43 +592,44 @@ trait StdContainerParser
         return $valueExpr;
     }
 
-    protected function parseStdUnsafeCastAssign(string $var, Expr\StaticCall $expr): string
+    protected function parseToStdAssign(string $var, Expr\MethodCall $expr): string
     {
-        if (count($expr->args) !== 2) {
-            $this->fatalError($expr, 'std::unsafe_cast() expects two arguments');
-        }
-        $typeExpr = $expr->args[0]->value;
-        if (!$this->isStaticCall($typeExpr) || !$this->isNameExpr($typeExpr->class) || !$this->isIdExpr($typeExpr->name) || $typeExpr->class->toString() !== 'std') {
-            $this->fatalError($expr->args[0]->value, 'std::unsafe_cast() expects first argument to be a std container type expression');
-        }
-        $containerType = $typeExpr->name->toString();
-        if (!in_array($containerType, ['array', 'vector', 'map', 'unordered_map'], true)) {
-            $this->fatalError($expr->args[0]->value, 'std::unsafe_cast() expects first argument to be a std container type expression');
-        }
-        if (!$this->isVarExpr($expr->args[1]->value)) {
-            $this->fatalError($expr->args[1]->value, 'std::unsafe_cast() expects second argument to be a variable');
+        $methodName = $expr->name->toString();
+        $containerType = match ($methodName) {
+            'toStdArray'        => 'array',
+            'toStdVector'       => 'vector',
+            'toStdMap'          => 'map',
+            'toStdUnorderedMap' => 'unordered_map',
+        };
+
+        if (!$this->isVarExpr($expr->var)) {
+            $this->fatalError($expr->var, "{$methodName}() must be called on a variable");
         }
-        $sourceVar = $this->parseVariable($expr->args[1]->value);
+        $sourceVar = $this->parseVariable($expr->var);
         if (!$this->hasVar($sourceVar)) {
-            $this->fatalError($expr->args[1]->value, 'Undefined variable `$' . $sourceVar . '`');
+            $this->fatalError($expr->var, 'Undefined variable `$' . $sourceVar . '`');
         }
 
+        $name = new Name('std');
+        $method = new Identifier($containerType);
+        $fakeCall = new StaticCall($name, $method, $expr->args);
+
         if ($containerType === 'array') {
             $this->addLocalVar($var, self::TYPE_STD_ARRAY);
-            $this->parseStdArray($var, $typeExpr);
+            $this->parseStdArray($var, $fakeCall);
             $this->context->stdArrays[$var]['unsafePtr'] = $sourceVar;
             return '// php_unsafe_cast<' . $this->context->stdArrays[$var]['decl'] . '>(' . $sourceVar . ')';
         }
 
         if ($containerType === 'vector') {
             $this->addLocalVar($var, self::TYPE_STD_VECTOR);
-            $this->parseStdVector($var, $typeExpr);
+            $this->parseStdVector($var, $fakeCall);
         } elseif ($containerType === 'map') {
             $this->addLocalVar($var, self::TYPE_STD_MAP);
-            $this->parseStdMap($var, $typeExpr);
+            $this->parseStdMap($var, $fakeCall);
         } else {
             $this->addLocalVar($var, self::TYPE_STD_UNORDERED_MAP);
-            $this->parseStdUnorderedMap($var, $typeExpr);
+            $this->parseStdUnorderedMap($var, $fakeCall);
         }
         $this->context->stdContainers[$var]['unsafePtr'] = $sourceVar;
         return '// php_unsafe_cast<' . $this->context->stdContainers[$var]['decl'] . '>(' . $sourceVar . ')';

src/Php/UniversalMethodCall.php

@@ -17,9 +17,6 @@ trait UniversalMethodCall
             'mod'      => ['handler' => 'calc_op', 'op' => '%', 'return_type' => CompilerBase::TYPE_INT, 'min_args' => 1, 'max_args' => 1],
             'inc'      => ['handler' => 'calc_inc', 'return_type' => CompilerBase::TYPE_INT, 'min_args' => 0, 'max_args' => 0],
             'dec'      => ['handler' => 'calc_dec', 'return_type' => CompilerBase::TYPE_INT, 'min_args' => 0, 'max_args' => 0],
-            'toFloat'  => ['handler' => 'convert_fn', 'fn' => 'toFloat', 'return_type' => CompilerBase::TYPE_FLOAT, 'min_args' => 0, 'max_args' => 0],
-            'toString' => ['handler' => 'convert_fn', 'fn' => 'toString', 'return_type' => CompilerBase::TYPE_STR, 'min_args' => 0, 'max_args' => 0],
-            'toBool'   => ['handler' => 'convert_fn', 'fn' => 'toBool', 'return_type' => CompilerBase::TYPE_BOOL, 'min_args' => 0, 'max_args' => 0],
             // math
             'abs'     => ['handler' => 'php_fn', 'fn' => 'abs', 'return_type' => CompilerBase::TYPE_INT, 'min_args' => 0, 'max_args' => 0],
             'ceil'    => ['handler' => 'php_fn', 'fn' => 'ceil', 'return_type' => CompilerBase::TYPE_FLOAT, 'min_args' => 0, 'max_args' => 0],
@@ -49,9 +46,6 @@ trait UniversalMethodCall
             'div'      => ['handler' => 'calc_op', 'op' => '/', 'return_type' => CompilerBase::TYPE_FLOAT, 'min_args' => 1, 'max_args' => 1],
             'inc'      => ['handler' => 'calc_inc', 'return_type' => CompilerBase::TYPE_FLOAT, 'min_args' => 0, 'max_args' => 0],
             'dec'      => ['handler' => 'calc_dec', 'return_type' => CompilerBase::TYPE_FLOAT, 'min_args' => 0, 'max_args' => 0],
-            'toInt'    => ['handler' => 'convert_fn', 'fn' => 'toInt', 'return_type' => CompilerBase::TYPE_INT, 'min_args' => 0, 'max_args' => 0],
-            'toString' => ['handler' => 'convert_fn', 'fn' => 'toString', 'return_type' => CompilerBase::TYPE_STR, 'min_args' => 0, 'max_args' => 0],
-            'toBool'   => ['handler' => 'convert_fn', 'fn' => 'toBool', 'return_type' => CompilerBase::TYPE_BOOL, 'min_args' => 0, 'max_args' => 0],
             // math
             'abs'     => ['handler' => 'php_fn', 'fn' => 'abs', 'return_type' => CompilerBase::TYPE_FLOAT, 'min_args' => 0, 'max_args' => 0],
             'ceil'    => ['handler' => 'php_fn', 'fn' => 'ceil', 'return_type' => CompilerBase::TYPE_FLOAT, 'min_args' => 0, 'max_args' => 0],
@@ -75,8 +69,6 @@ trait UniversalMethodCall
             'min'     => ['handler' => 'php_fn', 'fn' => 'min', 'return_type' => CompilerBase::TYPE_FLOAT, 'min_args' => 1, 'max_args' => 1],
         ],
         CompilerBase::TYPE_BOOL => [
-            'toInt'    => ['handler' => 'convert_fn', 'fn' => 'toInt', 'return_type' => CompilerBase::TYPE_INT, 'min_args' => 0, 'max_args' => 0],
-            'toString' => ['handler' => 'convert_fn', 'fn' => 'toString', 'return_type' => CompilerBase::TYPE_STR, 'min_args' => 0, 'max_args' => 0],
         ],
         CompilerBase::TYPE_STR => [
             // --- stdext string_methods (all use PHP standard functions) ---
@@ -173,10 +165,6 @@ trait UniversalMethodCall
             'jsonDecodeToObject'    => ['handler' => 'php_fn', 'fn' => 'json_decode', 'return_type' => CompilerBase::TYPE_OBJECT, 'min_args' => 0, 'max_args' => 2, 'const_args' => [1 => 'false']],
             // phpx C++ methods (no PHP function equivalent)
             'equals'                => ['handler' => 'direct_method', 'method' => 'equals', 'return_type' => CompilerBase::TYPE_BOOL, 'min_args' => 1, 'max_args' => 2],
-            // conversions
-            'toInt'                 => ['handler' => 'convert_fn', 'fn' => 'toInt', 'return_type' => CompilerBase::TYPE_INT, 'min_args' => 0, 'max_args' => 0],
-            'toFloat'               => ['handler' => 'convert_fn', 'fn' => 'toFloat', 'return_type' => CompilerBase::TYPE_FLOAT, 'min_args' => 0, 'max_args' => 0],
-            'toBool'                => ['handler' => 'convert_fn', 'fn' => 'toBool', 'return_type' => CompilerBase::TYPE_BOOL, 'min_args' => 0, 'max_args' => 0],
         ],
         CompilerBase::TYPE_ARRAY => [
             // --- stdext array_methods (all use PHP standard functions) ---
@@ -240,11 +228,6 @@ trait UniversalMethodCall
             'get'               => ['handler' => 'direct_method', 'method' => 'get', 'return_type' => CompilerBase::TYPE_VAR, 'min_args' => 1, 'max_args' => 1],
             'del'               => ['handler' => 'direct_method_mutate', 'method' => 'del', 'return_type' => CompilerBase::TYPE_ARRAY, 'min_args' => 1, 'max_args' => 1],
             'clean'             => ['handler' => 'direct_method_mutate', 'method' => 'clean', 'return_type' => CompilerBase::TYPE_ARRAY, 'min_args' => 0, 'max_args' => 0],
-            // conversions
-            'toInt'             => ['handler' => 'convert_fn', 'fn' => 'toInt', 'return_type' => CompilerBase::TYPE_INT, 'min_args' => 0, 'max_args' => 0],
-            'toFloat'           => ['handler' => 'convert_fn', 'fn' => 'toFloat', 'return_type' => CompilerBase::TYPE_FLOAT, 'min_args' => 0, 'max_args' => 0],
-            'toBool'            => ['handler' => 'convert_fn', 'fn' => 'toBool', 'return_type' => CompilerBase::TYPE_BOOL, 'min_args' => 0, 'max_args' => 0],
-            'toString'          => ['handler' => 'convert_fn', 'fn' => 'toString', 'return_type' => CompilerBase::TYPE_STR, 'min_args' => 0, 'max_args' => 0],
         ],
         CompilerBase::TYPE_STREAM => [
             // --- stdext stream_methods ---
@@ -299,9 +282,6 @@ trait UniversalMethodCall
             'divmod'       => ['handler' => 'cpp_fn', 'fn' => 'php::BigInt::divmod', 'return_type' => CompilerBase::TYPE_ARRAY, 'min_args' => 1, 'max_args' => 1],
             'powmod'       => ['handler' => 'cpp_fn', 'fn' => 'php::BigInt::powmod', 'return_type' => CompilerBase::TYPE_BIGINT, 'min_args' => 2, 'max_args' => 2],
             'sqrt'         => ['handler' => 'cpp_fn', 'fn' => 'php::BigInt::sqrt', 'return_type' => CompilerBase::TYPE_BIGINT, 'min_args' => 0, 'max_args' => 0],
-            'toString'     => ['handler' => 'cpp_fn', 'fn' => 'php::BigInt::toString', 'return_type' => CompilerBase::TYPE_STR, 'min_args' => 0, 'max_args' => 0],
-            'toInt'        => ['handler' => 'cpp_fn', 'fn' => 'php::BigInt::toInt', 'return_type' => CompilerBase::TYPE_INT, 'min_args' => 0, 'max_args' => 0],
-            'toFloat'      => ['handler' => 'cpp_fn', 'fn' => 'php::BigInt::toFloat', 'return_type' => CompilerBase::TYPE_FLOAT, 'min_args' => 0, 'max_args' => 0],
             'bitAnd'       => ['handler' => 'cpp_fn', 'fn' => 'php::BigInt::bitAnd', 'return_type' => CompilerBase::TYPE_BIGINT, 'min_args' => 1, 'max_args' => 1],
             'bitOr'        => ['handler' => 'cpp_fn', 'fn' => 'php::BigInt::bitOr', 'return_type' => CompilerBase::TYPE_BIGINT, 'min_args' => 1, 'max_args' => 1],
             'bitXor'       => ['handler' => 'cpp_fn', 'fn' => 'php::BigInt::bitXor', 'return_type' => CompilerBase::TYPE_BIGINT, 'min_args' => 1, 'max_args' => 1],
@@ -327,9 +307,6 @@ trait UniversalMethodCall
             'floor'    => ['handler' => 'cpp_fn', 'fn' => 'php::Decimal::floor', 'return_type' => CompilerBase::TYPE_DECIMAL, 'min_args' => 0, 'max_args' => 0],
             'ceil'     => ['handler' => 'cpp_fn', 'fn' => 'php::Decimal::ceil', 'return_type' => CompilerBase::TYPE_DECIMAL, 'min_args' => 0, 'max_args' => 0],
             'round'    => ['handler' => 'cpp_fn', 'fn' => 'php::Decimal::round', 'return_type' => CompilerBase::TYPE_DECIMAL, 'min_args' => 0, 'max_args' => 1],
-            'toString' => ['handler' => 'cpp_fn', 'fn' => 'php::Decimal::toString', 'return_type' => CompilerBase::TYPE_STR, 'min_args' => 0, 'max_args' => 0],
-            'toInt'    => ['handler' => 'cpp_fn', 'fn' => 'php::Decimal::toInt', 'return_type' => CompilerBase::TYPE_INT, 'min_args' => 0, 'max_args' => 0],
-            'toFloat'  => ['handler' => 'cpp_fn', 'fn' => 'php::Decimal::toFloat', 'return_type' => CompilerBase::TYPE_FLOAT, 'min_args' => 0, 'max_args' => 0],
         ],
         CompilerBase::TYPE_BIGFLOAT => [
             'add'      => ['handler' => 'cpp_fn', 'fn' => 'php::BigFloat::add', 'return_type' => CompilerBase::TYPE_BIGFLOAT, 'min_args' => 1, 'max_args' => 1],
@@ -339,9 +316,6 @@ trait UniversalMethodCall
             'neg'      => ['handler' => 'cpp_fn', 'fn' => 'php::BigFloat::neg', 'return_type' => CompilerBase::TYPE_BIGFLOAT, 'min_args' => 0, 'max_args' => 0],
             'cmp'      => ['handler' => 'cpp_fn', 'fn' => 'php::BigFloat::cmp', 'return_type' => CompilerBase::TYPE_INT, 'min_args' => 1, 'max_args' => 1],
             'abs'      => ['handler' => 'cpp_fn', 'fn' => 'php::BigFloat::abs', 'return_type' => CompilerBase::TYPE_BIGFLOAT, 'min_args' => 0, 'max_args' => 0],
-            'toString' => ['handler' => 'cpp_fn', 'fn' => 'php::BigFloat::toString', 'return_type' => CompilerBase::TYPE_STR, 'min_args' => 0, 'max_args' => 0],
-            'toInt'    => ['handler' => 'cpp_fn', 'fn' => 'php::BigFloat::toInt', 'return_type' => CompilerBase::TYPE_INT, 'min_args' => 0, 'max_args' => 0],
-            'toFloat'  => ['handler' => 'cpp_fn', 'fn' => 'php::BigFloat::toFloat', 'return_type' => CompilerBase::TYPE_FLOAT, 'min_args' => 0, 'max_args' => 0],
         ],
     ];
 
@@ -351,19 +325,6 @@ trait UniversalMethodCall
 
     protected function detectUniversalMethodReturnType(string $type, string $method): ?string
     {
-        if ($type === CompilerBase::TYPE_VAR) {
-            foreach (self::TYPE_SEARCH_ORDER as $searchType) {
-                $def = static::UNIVERSAL_METHODS[$searchType][$method] ?? null;
-                if ($def !== null) {
-                    return $def['return_type'];
-                }
-                $ext = $this->findExtensionMethod($searchType, $method);
-                if ($ext !== null) {
-                    return $ext['return_type'];
-                }
-            }
-            return null;
-        }
         $builtin = self::UNIVERSAL_METHODS[$type][$method]['return_type'] ?? null;
         if ($builtin !== null) {
             return $builtin;
@@ -390,24 +351,36 @@ trait UniversalMethodCall
         return strtolower(preg_replace('/([a-z])([A-Z])/', '$1_$2', $name));
     }
 
+    private const array TO_CONVERT_FN = [
+        CompilerBase::TYPE_BIGINT   => ['toInt' => 'php::BigInt::toInt', 'toFloat' => 'php::BigInt::toFloat', 'toString' => 'php::BigInt::toString'],
+        CompilerBase::TYPE_BIGFLOAT => ['toInt' => 'php::BigFloat::toInt', 'toFloat' => 'php::BigFloat::toFloat', 'toString' => 'php::BigFloat::toString'],
+        CompilerBase::TYPE_DECIMAL  => ['toInt' => 'php::Decimal::toInt', 'toFloat' => 'php::Decimal::toFloat', 'toString' => 'php::Decimal::toString'],
+    ];
+
     /**
-     * Search all type tables for a method. Returns [type, def] or null.
+     * Generate C++ code for a to* keyword conversion call.
      */
+    protected function genToConvertCall(string $receiver, string $method, string $receiverType = ''): string
+    {
+        if ($receiverType !== '' && isset(self::TO_CONVERT_FN[$receiverType][$method])) {
+            return self::TO_CONVERT_FN[$receiverType][$method] . '(' . $receiver . ')';
+        }
+        return match ($method) {
+            'toInt'       => 'php::toInt(' . $receiver . ')',
+            'toFloat'     => 'php::toFloat(' . $receiver . ')',
+            'toString'    => 'php::toString(' . $receiver . ')',
+            'toBool'      => 'php::toBool(' . $receiver . ')',
+            'toArray'     => 'php::toArray(' . $receiver . ')',
+            'toStream'    => 'php::toStream(' . $receiver . ')',
+            'toBigInt'    => 'php::BigInt::newInstance(' . $receiver . ')',
+            'toBigFloat'  => 'php::BigFloat::newInstance(' . $receiver . ')',
+            'toDecimal'   => 'php::Decimal::newInstance(' . $receiver . ')',
+            default       => $receiver,
+        };
+    }
+
     protected function findUniversalMethodAnyType(string $type, string $method): ?array
     {
-        if ($type === CompilerBase::TYPE_VAR) {
-            foreach (self::TYPE_SEARCH_ORDER as $searchType) {
-                $def = self::UNIVERSAL_METHODS[$searchType][$method] ?? null;
-                if ($def !== null) {
-                    return $def;
-                }
-                $ext = $this->findExtensionMethod($searchType, $method);
-                if ($ext !== null) {
-                    return $ext;
-                }
-            }
-            return null;
-        }
         $builtin = self::UNIVERSAL_METHODS[$type][$method] ?? null;
         if ($builtin !== null) {
             return $builtin;

src/polyfills.php

@@ -70,11 +70,6 @@ class std
         return null;
     }
 
-    public static function unsafe_cast(mixed $type, mixed $ptr): mixed
-    {
-        return $ptr;
-    }
-
     public static function fill(array $array, mixed $value): void
     {
         for ($i = 0; $i < count($array); $i++) {

tests/aot/std-array/007.phpt

@@ -4,7 +4,7 @@ std array: unsafe_cast
 <?php
 function std_array_unsafe_ptr_update($source): void
 {
-    $array = std::unsafe_cast(std::array(native_types::type_int, 3), $source);
+    $array = $source->toStdArray(native_types::type_int, 3);
     var_dump($array[1]);
     $array[2] = 9;
 }

tests/aot/std-array/008.phpt

@@ -4,7 +4,7 @@ std array: unsafe_cast type mismatch
 <?php
 function std_array_unsafe_ptr_type_mismatch($source): void
 {
-    $array = std::unsafe_cast(std::array(native_types::type_float, 3), $source);
+    $array = $source->toStdArray(native_types::type_float, 3);
 }
 
 function main() {
@@ -17,4 +17,4 @@ function main() {
 }
 ?>
 --EXPECT--
-std::unsafe_cast(): std container type mismatch
+std container type mismatch

tests/aot/std-map/005.phpt

@@ -4,7 +4,7 @@ std map: unsafe_cast
 <?php
 function std_map_unsafe_ptr_update($source): void
 {
-    $map = std::unsafe_cast(std::map(complex_types::type_str, native_types::type_int), $source);
+    $map = $source->toStdMap(complex_types::type_str, native_types::type_int);
     var_dump($map["b"]);
     $map["c"] = 9;
 

tests/aot/std-map/006.phpt

@@ -4,7 +4,7 @@ std map: unsafe_cast type mismatch
 <?php
 function std_map_unsafe_ptr_type_mismatch($source): void
 {
-    $map = std::unsafe_cast(std::map(complex_types::type_str, native_types::type_float), $source);
+    $map = $source->toStdMap(complex_types::type_str, native_types::type_float);
 }
 
 function main() {
@@ -17,4 +17,4 @@ function main() {
 }
 ?>
 --EXPECT--
-std::unsafe_cast(): std container type mismatch
+std container type mismatch

tests/aot/std-unordered-map/005.phpt

@@ -4,7 +4,7 @@ std unordered map: unsafe_cast
 <?php
 function std_unordered_map_unsafe_ptr_update($source): void
 {
-    $map = std::unsafe_cast(std::unordered_map(native_types::type_int, native_types::type_int), $source);
+    $map = $source->toStdUnorderedMap(native_types::type_int, native_types::type_int);
     var_dump($map[2]);
     $map[3] = 9;
 }

tests/aot/std-unordered-map/006.phpt

@@ -4,7 +4,7 @@ std unordered map: unsafe_cast type mismatch
 <?php
 function std_unordered_map_unsafe_ptr_type_mismatch($source): void
 {
-    $map = std::unsafe_cast(std::unordered_map(native_types::type_int, native_types::type_float), $source);
+    $map = $source->toStdUnorderedMap(native_types::type_int, native_types::type_float);
 }
 
 function main() {
@@ -17,4 +17,4 @@ function main() {
 }
 ?>
 --EXPECT--
-std::unsafe_cast(): std container type mismatch
+std container type mismatch

tests/aot/std-vector/006.phpt

@@ -4,7 +4,7 @@ std vector: unsafe_cast
 <?php
 function std_vector_unsafe_ptr_update($source): void
 {
-    $vector = std::unsafe_cast(std::vector(native_types::type_int), $source);
+    $vector = $source->toStdVector(native_types::type_int);
     var_dump($vector[1]);
     $vector[2] = 9;
 }

tests/aot/std-vector/007.phpt

@@ -4,7 +4,7 @@ std vector: unsafe_cast type mismatch
 <?php
 function std_vector_unsafe_ptr_type_mismatch($source): void
 {
-    $vector = std::unsafe_cast(std::vector(native_types::type_float), $source);
+    $vector = $source->toStdVector(native_types::type_float);
 }
 
 function main() {
@@ -17,4 +17,4 @@ function main() {
 }
 ?>
 --EXPECT--
-std::unsafe_cast(): std container type mismatch
+std container type mismatch

tests/aot/std-vector/008.phpt

@@ -12,7 +12,7 @@ class StdVectorUnsafeCastOther
 
 function std_vector_unsafe_ptr_class_type_mismatch($source): void
 {
-    $vector = std::unsafe_cast(std::vector(StdVectorUnsafeCastOther::class), $source);
+    $vector = $source->toStdVector(StdVectorUnsafeCastOther::class);
 }
 
 function main() {
@@ -25,4 +25,4 @@ function main() {
 }
 ?>
 --EXPECT--
-std::unsafe_cast(): std container type mismatch
+std container type mismatch

tests/aot/std-vector/009.phpt

@@ -7,7 +7,7 @@ namespace StdVectorUnsafeCastNs {
     {
         public static function update($source): void
         {
-            $vector = std::unsafe_cast(std::vector(self::class), $source);
+            $vector = $source->toStdVector(self::class);
             echo "ok\n";
         }