snapshot before regression test

lib/core/Handles/HandlesBase.py

@@ -0,0 +1,832 @@
+from __future__ import annotations
+from typing import TYPE_CHECKING, List, Any
+if TYPE_CHECKING:
+    from lib.core.translator import Translator
+    from lib.core.LlvmCodeGenerator import LlvmCodeGenerator
+
+import ast
+from enum import IntFlag, auto
+
+from llvmlite import ir as _ir
+
+from lib.constants import config as _config
+from lib.includes import t
+from lib.includes.t import CTypeRegistry
+from lib.core.TypeSpec import TypeSpec, SymbolMeta, FIELD_ROUTES
+from lib.core.VLogger import get_logger as _vlog
+
+
+EXCEPTION_CODE_MAP: dict[str, int] = {
+    'ValueError': 1, 'TypeError': 2, 'RuntimeError': 3,
+    'ZeroDivisionError': 4, 'IndexError': 5, 'KeyError': 6,
+    'IOError': 7, 'OSError': 8, 'AssertionError': 9, 'Exception': 99,
+}
+
+
+class FuncMeta(IntFlag):
+    NONE = 0
+    STATIC_METHOD = auto()
+    PROPERTY_GETTER = auto()
+    PROPERTY_SETTER = auto()
+    PROPERTY_DELETER = auto()
+    CLASS_METHOD = auto()
+    ABSTRACT = auto()
+
+
+class _Delegated:
+    """CTypeInfo 旧字段名委托描述符 — 静态委托到 _ts/_sm 的字段
+
+    替代旧的 FIELD_ROUTES + __setattr__/__getattr__ 动态路由：
+    描述符在类创建时绑定，访问时直接走 __get__/__set__，
+    无 dict 查找和字符串比较的运行时开销。
+    """
+    __slots__ = ('_target_attr', '_field_name')
+
+    def __init__(self, target_attr: str, field_name: str) -> None:
+        self._target_attr: str = target_attr   # '_ts' or '_sm'
+        self._field_name: str = field_name
+
+    def __get__(self, obj: Any, objtype: type | None = None) -> Any:
+        if obj is None:
+            return self
+        target: Any = object.__getattribute__(obj, self._target_attr)
+        return getattr(target, self._field_name)
+
+    def __set__(self, obj: Any, value: Any) -> None:
+        target: Any = object.__getattribute__(obj, self._target_attr)
+        setattr(target, self._field_name, value)
+
+
+class CTypeInfo:
+    """
+    C 类型信息对象 - 统一符号表条目和类型计算
+
+    设计原则:
+    - BaseType 是 CType 实例（来自 t 模块），永远不使用硬编码字符串
+    - 描述符分为两种:
+      - VarConst/VarVolatile: 变量本身（指针）的限定符，如 int * const
+      - DataConst/DataVolatile: 指向数据的限定符，如 const int *
+
+    属性（类型计算）:
+    - BaseType: t.CType - 基础类型实例 (如 t.CInt(), t.CVoid())
+    - PtrCount: int - 指针层数
+    - VarConst: bool - 变量本身（指针）是否 const，如 int * const
+    - VarVolatile: bool - 变量本身（指针）是否 volatile
+    - DataConst: bool - 指向的数据是否 const，如 const int *
+    - DataVolatile: bool - 指向的数据是否 volatile
+    - ArrayDims: List[str] - 数组维度
+    - Storage: t.CType - 存储类 (static, extern 等)
+    - IsFuncPtr: bool - 是否函数指针
+    - FuncPtrParams: List[Tuple[str, CTypeInfo]] - 函数指针参数列表，每个元素是 (参数名, 参数类型)
+    - FuncPtrReturn: CTypeInfo - 函数指针返回类型
+    - IsBitField: bool - 是否位域
+    - BitWidth: int - 位域宽度
+    - IsTypedef/IsStruct/IsEnum/IsUnion: bool - 类型种类
+
+    属性（符号表元数据）:
+    - Name: str - 名称（struct/enum/union/typedef 名）
+    - Members: Dict[str, CTypeInfo] - 成员字典（用于 struct/union）
+    - OriginalType: str - typedef 的原始类型
+    - DeclaredType: str - 声明类型
+    - CreturnTypes: list - C 返回类型列表
+    - Lineno: int - 定义行号
+    - IsAnonymous: bool - 是否匿名类型
+    - IsCpythonObject: bool - 是否 CPython 对象
+    - IsEnumMember: bool - 是否枚举成员
+    """
+
+    def __init__(self) -> None:
+        object.__setattr__(self, '_ts', TypeSpec())
+        sm: SymbolMeta = SymbolMeta()
+        sm.meta_list = FuncMeta.NONE
+        object.__setattr__(self, '_sm', sm)
+
+    # --- 新公共 API：供新代码直接访问 TypeSpec / SymbolMeta / SymbolKind ---
+    @property
+    def ts(self) -> TypeSpec:
+        """TypeSpec — 纯类型描述（只读）"""
+        return self._ts
+
+    @property
+    def sm(self) -> SymbolMeta:
+        """SymbolMeta — 符号表元数据（只读）"""
+        return self._sm
+
+    @property
+    def kind(self) -> 'SymbolKind':
+        """SymbolKind — 符号类型种类枚举"""
+        return self._sm.kind
+
+    # 注：旧字段名（PtrCount/IsStruct/Name 等）的委托通过 _Delegated 描述符实现，
+    # 在模块末尾从 FIELD_ROUTES 静态绑定，无需 __setattr__/__getattr__ 动态路由
+
+
+
+    @property
+    def BaseType(self) -> t.CType | tuple | None:
+        return self._ts._base_type
+
+    @BaseType.setter
+    def BaseType(self, value: t.CType | type | tuple | List | None) -> None:
+        """设置 BaseType，接受以下类型：
+
+        - None: 清空
+        - t.CType 实例: 单个类型，自动设置 IsStruct/IsEnum/IsUnion 标志
+        - type (CType 子类): 如 t.CStruct，自动实例化
+        - tuple/list of t.CType: 多个组合类型
+        """
+        ts: TypeSpec = self._ts
+        sm: SymbolMeta = self._sm
+
+        if value is None:
+            ts._base_type = None
+            sm.is_struct = False
+            sm.is_enum = False
+            sm.is_union = False
+            sm.is_renum = False
+            return
+
+        if isinstance(value, (tuple, list)):
+            ts._base_type = tuple(value)
+            for v in value:
+                if isinstance(v, t.CStruct):
+                    sm.is_struct = True
+                elif isinstance(v, t.CEnum):
+                    sm.is_enum = True
+                elif isinstance(v, t.CUnion):
+                    sm.is_union = True
+                elif isinstance(v, t.REnum):
+                    sm.is_renum = True
+                    sm.is_enum = True
+            return
+
+        if isinstance(value, type) and issubclass(value, t.CType):
+            ts._base_type = value()
+            return
+
+        if isinstance(value, t.CType):
+            ts._base_type = value
+            if isinstance(value, t.CStruct):
+                sm.is_struct = True
+                sm.is_enum = False
+                sm.is_union = False
+                sm.is_renum = False
+            elif isinstance(value, t.REnum):
+                sm.is_renum = True
+                sm.is_enum = True
+                sm.is_struct = False
+                sm.is_union = False
+            elif isinstance(value, t.CEnum):
+                sm.is_enum = True
+                sm.is_struct = False
+                sm.is_union = False
+                sm.is_renum = False
+            elif isinstance(value, t.CUnion):
+                sm.is_union = True
+                sm.is_struct = False
+                sm.is_enum = False
+                sm.is_renum = False
+            return
+
+        raise TypeError(f"BaseType must be t.CType instance, type subclass, or tuple of t.CType, got {type(value)}")
+
+    @property
+    def TypeCls(self) -> type | None:
+        """获取 CType 类（从 BaseType 推断）"""
+        bt: t.CType | tuple | None = self._ts._base_type
+        if bt:
+            return type(bt)
+        sm: SymbolMeta = self._sm
+        if sm.is_struct:
+            return t.CStruct
+        if sm.is_enum:
+            return t.CEnum
+        if sm.is_union:
+            return t.CUnion
+        if sm.is_typedef:
+            return t._CTypedef
+        return None
+
+    @property
+    def IsPtr(self) -> bool:
+        return self._ts.ptr_count > 0
+
+    @property
+    def IsVoid(self) -> bool:
+        return isinstance(self._ts._base_type, t.CVoid)
+
+    @property
+    def IsStr(self) -> bool:
+        return isinstance(self._ts._base_type, t.CChar) and self._ts.ptr_count > 0
+
+    @property
+    def IsInt(self) -> bool:
+        bt: t.CType | tuple | None = self._ts._base_type
+        return isinstance(bt, t.CType) and getattr(bt, 'IsSigned', None) is not None and bt.IsSigned is True and not isinstance(bt, t.CVoid)
+
+    @property
+    def IsUInt(self) -> bool:
+        bt: t.CType | tuple | None = self._ts._base_type
+        return isinstance(bt, t.CType) and getattr(bt, 'IsSigned', None) is False
+
+    @property
+    def IsFloat(self) -> bool:
+        bt: t.CType | tuple | None = self._ts._base_type
+        return isinstance(bt, t.CType) and getattr(bt, 'IsSigned', None) is None and getattr(bt, 'Size', 0) in (32, 64, 128) and not isinstance(bt, t.CVoid)
+
+    def ToString(self) -> str:
+        ts: TypeSpec = self._ts
+        sm: SymbolMeta = self._sm
+        bt: t.CType | tuple | None = ts._base_type
+
+        if ts.is_func_ptr:
+            return 'Callable'
+        parts: list[str] = []
+
+        if ts.storage and not isinstance(ts.storage, t.CExport):
+            parts.append(type(ts.storage).__name__)
+
+        if ts.data_const or ts.data_volatile:
+            qualifiers: list[str] = []
+            if ts.data_const:
+                qualifiers.append("const")
+            if ts.data_volatile:
+                qualifiers.append("volatile")
+            parts.append("_".join(qualifiers))
+
+        if sm.is_typedef and sm.name:
+            return sm.name
+        elif sm.is_renum and sm.name:
+            base_name: str = sm.name
+        elif bt:
+            if isinstance(bt, str):
+                base_name = bt
+            elif isinstance(bt, type) and issubclass(bt, t.CType):
+                base_name = bt.__name__
+            elif isinstance(bt, t.CType):
+                # 对命名的 CType（CStruct/CEnum/CUnion/REnum），优先使用其 name 属性
+                # 否则回退到类名（如 'CInt'、'CChar'）
+                _named: str | None = getattr(bt, 'name', None)
+                base_name = _named if _named else type(bt).__name__
+            else:
+                base_name = str(bt)
+        else:
+            base_name = "void"
+
+        if ts.is_array_ptr:
+            ptr_str: str = ""
+            if ts.ptr_count > 0:
+                ptr_str = "*" * ts.ptr_count
+            if ts.array_ptr:
+                inner: str = ts.array_ptr.ToString()
+                if ptr_str:
+                    parts.append(f"{base_name} {ptr_str}({inner})")
+                else:
+                    parts.append(f"{base_name} ({inner})")
+            else:
+                if ptr_str:
+                    parts.append(f"{base_name} {ptr_str}()")
+                else:
+                    parts.append(f"{base_name} ()")
+        elif ts.array_ptr:
+            inner = ts.array_ptr.ToString()
+            if ts.ptr_count > 0:
+                parts.append(f"{base_name} {'*' * ts.ptr_count}({inner})")
+            else:
+                parts.append(f"{base_name} ({inner})")
+        else:
+            parts.append(base_name)
+            if ts.ptr_count > 0:
+                parts.append("*" * ts.ptr_count)
+                if ts.var_const:
+                    parts.append("const")
+                if ts.var_volatile:
+                    parts.append("volatile")
+
+        for dim in ts.array_dims:
+            if dim:
+                parts.append(f"[{dim}]")
+            else:
+                parts.append("[]")
+
+        return " ".join(parts) if parts else "void"
+
+    @staticmethod
+    def CreateFromTypeName(TypeName: str) -> "CTypeInfo":
+        """从类型名字符串创建 CTypeInfo（兼容旧 API）"""
+        info: CTypeInfo = CTypeInfo()
+        if TypeName.startswith('struct '):
+            info.BaseType = t.CStruct(name=TypeName[7:].strip()) if TypeName[7:].strip() else t.CStruct()
+        elif TypeName.startswith('enum '):
+            info.BaseType = t.CEnum(name=TypeName[5:].strip()) if TypeName[5:].strip() else t.CEnum()
+        elif TypeName.startswith('union '):
+            info.BaseType = t.CUnion(name=TypeName[6:].strip()) if TypeName[6:].strip() else t.CUnion()
+        else:
+            info.BaseType = t.CStruct(name=TypeName)
+        return info
+
+    # LLVM primitive type name → (CTypeClass, PtrCount) mapping
+    # Used when generic type inference produces LLVM type names like 'i64', 'double', etc.
+    _LLVM_PRIMITIVE_MAP: dict[str, tuple[type, int]] | None = None
+
+    @classmethod
+    def _get_llvm_primitive_map(cls) -> dict[str, tuple[type, int]]:
+        if cls._LLVM_PRIMITIVE_MAP is not None:
+            return cls._LLVM_PRIMITIVE_MAP
+        cls._LLVM_PRIMITIVE_MAP = {
+            'void': (t.CVoid, 0),
+            'i1': (t.CInt, 0),
+            'i8': (t.CChar, 0),
+            'i16': (t.CShort, 0),
+            'i32': (t.CInt, 0),
+            'i64': (t.CLong, 0),
+            'i128': (t.CInt, 0),
+            'float': (t.CFloat, 0),
+            'double': (t.CDouble, 0),
+            'fp128': (t.CFloat128T, 0),
+        }
+        return cls._LLVM_PRIMITIVE_MAP
+
+    @staticmethod
+    def FromTypeName(TypeName: str) -> "CTypeInfo":
+        """从简单类型名构造 CTypeInfo（不经过 FromStr 字符串解析）"""
+        from lib.core.TypeAnnotationResolver import TypeAnnotationResolver
+        return TypeAnnotationResolver.from_type_name(TypeName)
+
+    # FromStr 已移除 - 类型解析不再经过中间字符串格式
+    # typedef 展开直接走 CTypeInfo 对象，不经过字符串解析
+
+    @staticmethod
+    def TryEvalConstExpr(node: ast.AST, SymbolTable: Any) -> Any:
+        from lib.core.TypeAnnotationResolver import TypeAnnotationResolver
+        return TypeAnnotationResolver.try_eval_const_expr(node, SymbolTable)
+
+    @classmethod
+    def FromNode(cls, Node: ast.AST, SymbolTable: Any) -> "CTypeInfo":
+        """从 AST 节点解析 CTypeInfo（类方法）
+
+        Args:
+            Node: AST 节点（如 ast.Name, ast.Attribute 等）
+            SymbolTable: 符号表字典
+        """
+        from lib.core.TypeAnnotationResolver import TypeAnnotationResolver
+        return TypeAnnotationResolver.from_node(Node, SymbolTable)
+
+
+    def Copy(self) -> "CTypeInfo":
+        NewInfo: CTypeInfo = CTypeInfo()
+        NewInfo._ts = self._ts.copy()
+        NewInfo._sm = self._sm.copy()
+        # CTypeInfo 引用字段需要深拷贝
+        if isinstance(NewInfo._ts.func_ptr_return, CTypeInfo):
+            NewInfo._ts.func_ptr_return = NewInfo._ts.func_ptr_return.Copy()
+        if isinstance(NewInfo._ts.original_type, CTypeInfo):
+            NewInfo._ts.original_type = NewInfo._ts.original_type.Copy()
+        if NewInfo._ts.array_ptr:
+            NewInfo._ts.array_ptr = NewInfo._ts.array_ptr.Copy()
+        return NewInfo
+
+    def get(self, key: str, default: Any = None) -> Any:
+        """获取额外属性"""
+        return self._sm._extra.get(key, default)
+
+    def set(self, key: str, value: Any) -> None:
+        """设置额外属性"""
+        self._sm._extra[key] = value
+
+    @staticmethod
+    def VoidTypeInfo() -> "CTypeInfo":
+        info: CTypeInfo = CTypeInfo()
+        info.BaseType = t.CVoid()
+        return info
+
+    def ToLLVM(self, Gen: LlvmCodeGenerator) -> _ir.Type:
+        if Gen is None:
+            return _ir.IntType(32)
+        return Gen._ctype_to_llvm(self)
+
+    def __str__(self) -> str:
+        return self.ToString()
+
+    def __repr__(self) -> str:
+        ts: TypeSpec = self._ts
+        sm: SymbolMeta = self._sm
+        return f"CTypeInfo(BaseType={ts._base_type}, PtrCount={ts.ptr_count}, IsTypedef={sm.is_typedef}, OriginalType={ts.original_type!r}, VarConst={ts.var_const}, DataConst={ts.data_const})"
+
+
+# 从 FIELD_ROUTES 静态绑定 _Delegated 描述符到 CTypeInfo 类
+# 这是一次性配置（类创建期执行），替代运行时 __setattr__/__getattr__ 动态路由
+for _old_name, (_target, _field) in FIELD_ROUTES.items():
+    setattr(CTypeInfo, _old_name, _Delegated('_' + _target, _field))
+del _old_name, _target, _field
+
+
+class CTypeHelper:
+
+    @staticmethod
+    def GetTModuleCType(TypeName: str) -> type | None:
+        result: type | None = CTypeRegistry.GetClassByName(TypeName)
+        if result is not None:
+            return result
+        TypeClass: type | None = getattr(t, TypeName, None)
+        if TypeClass and isinstance(TypeClass, type) and issubclass(TypeClass, t.CType):
+            return TypeClass
+        FallbackClass: type | None = getattr(t, f'_{TypeName}', None)
+        if FallbackClass and isinstance(FallbackClass, type) and issubclass(FallbackClass, t.CType):
+            return FallbackClass
+        return None
+
+    @staticmethod
+    def GetCName(type_or_name: str | type) -> str:
+        if isinstance(type_or_name, str):
+            cls: type | None = CTypeRegistry.GetClassByName(type_or_name)
+            if cls is None:
+                cls = CTypeHelper.GetTModuleCType(type_or_name)
+            if cls:
+                return cls.__name__
+            return type_or_name
+        elif isinstance(type_or_name, type) and issubclass(type_or_name, t.CType):
+            return type_or_name.__name__
+        return ''
+
+
+class BuiltinTypeMap:
+    """
+    内置类型映射表 - 字符串到 (CType类, PtrCount) 的映射
+
+    用法：BuiltinTypeMap.Get('int') -> (t.CInt, 0)
+         BuiltinTypeMap.Get('BYTEPTR') -> (t.CUnsignedChar, 1)
+    """
+
+    _map: dict[str, tuple[type, int]] | None = None
+
+    @classmethod
+    def _build_map(cls) -> dict[str, tuple[type, int]]:
+        if cls._map is not None:
+            return cls._map
+        CTypeRegistry._build()
+        cls._map = {}
+        # 仅使用 Python 类名 → (CType 类, ptr_level) 映射。
+        # C 类型名（如 'int'、'int32_t'）不再通过 _cname_to_class 提供。
+        # C 头文件 stub 生成器使用独立的硬编码表（CTypeMapper._CNAME_TO_PY）。
+        for pyname, ctype_cls in CTypeRegistry._name_to_class.items():
+            pos: frozenset = getattr(ctype_cls, 'position', frozenset())
+            if t.CType.POINTER in pos and t.CType.BASE not in pos:
+                cls._map[pyname] = (ctype_cls, 1)
+            else:
+                cls._map[pyname] = (ctype_cls, 0)
+        # 保留一些常用的字符串速记（这些不是 CName，而是硬编码的便捷别名）。
+        # 包含 Python 内置类型名（int/float/bool）和 C 类型名速记（char/short/long 等）。
+        _SPECIAL: dict[str, tuple[type, int]] = {
+            # Python 内置类型名
+            'str': (t.CChar, 1), 'bytes': (t.CChar, 1),
+            'int': (t.CInt, 0), 'float': (t.CFloat, 0), 'bool': (t.CBool, 0),
+            # C 类型名速记
+            'char': (t.CChar, 0), 'short': (t.CShort, 0),
+            'long': (t.CLong, 0), 'long long': (t.CLongLong, 0),
+            'double': (t.CDouble, 0),
+            'unsigned': (t.CUnsigned, 0),
+            'signed': (t.CInt, 0), 'signed int': (t.CInt, 0),
+            'signed char': (t.CSignedChar, 0),
+            'void': (t.CVoid, 0), 'Void': (t.CVoid, 0),
+        }
+        for k, v in _SPECIAL.items():
+            if k not in cls._map:
+                cls._map[k] = v
+        _FLOAT_ALIASES: dict[str, tuple[type, int]] = {
+            'FLOAT8': (t.CFloat8T, 0), 'FLOAT16': (t.CFloat16T, 0),
+            'FLOAT32': (t.CFloat32T, 0), 'FLOAT64': (t.CFloat64T, 0),
+            'FLOAT128': (t.CFloat128T, 0),
+        }
+        for k, v in _FLOAT_ALIASES.items():
+            if k not in cls._map:
+                cls._map[k] = v
+        return cls._map
+
+    @classmethod
+    def Get(cls, type_name: str) -> tuple[type, int] | None:
+        """获取类型类和指针层级"""
+        return cls._build_map().get(type_name)
+
+
+class BaseHandle:
+    def __init__(self, translator: "Translator") -> None:
+        self.Trans: Translator = translator
+        self._CurrentCpythonObjectClass: str | None = None
+
+    @staticmethod
+    def _is_char_pointer(val: _ir.Value) -> bool:
+        """检查值是否为 char* (i8*) 指针"""
+        if not isinstance(val.type, _ir.PointerType):
+            return False
+        pointee: _ir.Type = val.type.pointee
+        return isinstance(pointee, _ir.IntType) and pointee.width == 8
+
+    def HandleExprLlvm(self, Node: ast.AST, VarType: _ir.Type | str | None = None) -> _ir.Value | None:
+        return self.Trans.ExprHandler.HandleExprLlvm(Node, VarType)
+
+    def HandleBodyLlvm(self, Body: ast.AST | list[ast.stmt]) -> Any:
+        return self.Trans.BodyHandler.HandleBodyLlvm(Body)
+
+    def _get_int_ptr(self, Node: ast.AST) -> _ir.Value | None:
+        Gen: LlvmCodeGenerator = self.Trans.LlvmGen
+        if isinstance(Node, ast.Name):
+            if Node.id in Gen.variables:
+                return Gen.variables[Node.id]
+        elif isinstance(Node, ast.Attribute):
+            obj_val: Any = self.HandleExprLlvm(Node.value)
+            if not obj_val:
+                return None
+            if isinstance(obj_val.type, _ir.PointerType):
+                pointee: _ir.Type = obj_val.type.pointee
+                if isinstance(pointee, (_ir.IdentifiedStructType, _ir.LiteralStructType)):
+                    StructName: str | None = None
+                    if isinstance(pointee, _ir.IdentifiedStructType):
+                        StructName = pointee.name
+                    if not StructName:
+                        for ClassName, struct_type in Gen.structs.items():
+                            if struct_type == pointee:
+                                StructName = ClassName
+                                break
+                    if StructName and StructName in Gen.structs:
+                        offset: int = self.Trans.ExprHandler._get_llvm_member_offset(Node.attr, StructName, Gen)
+                        member_ptr: Any = Gen.builder.gep(obj_val, [_ir.Constant(_ir.IntType(32), 0), _ir.Constant(_ir.IntType(32), offset)], name=f"{Node.attr}_ptr")
+                        return member_ptr
+        return None
+
+    def _IsTModuleType(self, TypeName: str) -> bool:
+        if TypeName in ('t', 'State', 'Bit', 'Anonymous', 'Postdefinition'):
+            return True
+        TypeClass: type | None = getattr(t, TypeName, None)
+        if TypeClass and isinstance(TypeClass, type):
+            if issubclass(TypeClass, t.CType):
+                return True
+        FallbackClass: type | None = getattr(t, f'_{TypeName}', None)
+        if FallbackClass and isinstance(FallbackClass, type):
+            if issubclass(FallbackClass, t.CType):
+                return True
+        return False
+
+    def ResolveListElementType(
+        self,
+        elem_type_node: ast.expr,
+        Gen: Any,
+        *,
+        check_func_ptr: bool = False,
+        handle_str: bool = False,
+        void_fallback_width: int = 32,
+        fallback_to_cint: bool = False,
+    ) -> tuple[Any, CTypeInfo | None]:
+        """解析 list 元素类型，返回 (LLVM类型, CTypeInfo|None)。
+
+        统一处理结构体、str、函数指针、VoidType 回退等变体。
+
+        Args:
+            check_func_ptr: 是否检查函数指针（全局变量路径需要）
+            handle_str: 是否处理 str → i8*（局部变量路径需要）
+            void_fallback_width: VoidType 回退宽度 (32 或 8)
+            fallback_to_cint: 无类型信息时回退到 CInt
+        """
+        elem_type_info: CTypeInfo | None = CTypeInfo.FromNode(elem_type_node, self.Trans.SymbolTable)
+
+        # 结构体类型
+        if isinstance(elem_type_node, ast.Name) and elem_type_node.id in Gen.structs:
+            if check_func_ptr:
+                sym_entry: CTypeInfo | None = self.Trans.SymbolTable.lookup(elem_type_node.id)
+                if sym_entry and isinstance(sym_entry, CTypeInfo) and sym_entry.IsFuncPtr:
+                    return _ir.IntType(8).as_pointer(), elem_type_info
+            return Gen.structs[elem_type_node.id], elem_type_info
+
+        # str → i8*
+        if handle_str and isinstance(elem_type_node, ast.Name) and elem_type_node.id == 'str':
+            return _ir.PointerType(_ir.IntType(8)), elem_type_info
+
+        # 函数指针检查
+        if check_func_ptr and elem_type_info and elem_type_info.IsFuncPtr:
+            return _ir.IntType(8).as_pointer(), elem_type_info
+
+        # 回退到 CInt
+        if elem_type_info is None and fallback_to_cint:
+            elem_type_info = CTypeInfo()
+            elem_type_info.BaseType = t.CInt()
+
+        elem_type: Any = Gen._ctype_to_llvm(elem_type_info)
+        if isinstance(elem_type, _ir.VoidType):
+            elem_type = _ir.IntType(void_fallback_width)
+
+        return elem_type, elem_type_info
+
+    def ParseArrayCount(
+        self,
+        count_node: ast.expr | None,
+        Gen: Any,
+        value_node: ast.expr | None = None,
+        *,
+        mode: str = 'global',
+    ) -> int:
+        """解析数组计数，返回计数（默认 1）。
+
+        统一处理 Constant/Name/Attribute/BinOp/None 等形式。
+        None 或 Constant(None) 时从 value_node 推断（List 长度或 str 长度+1）。
+
+        Args:
+            count_node: 计数 AST 节点
+            value_node: 赋值右侧值节点（用于 count_node 为 None 时推断）
+            mode: 'global' 使用 _eval_global_count + SymbolTable + _define_constants；
+                  'local' 使用 TryEvalConstExpr
+        """
+        # None 或 Constant(None) → 从 value_node 推断
+        if count_node is None or (isinstance(count_node, ast.Constant) and count_node.value is None):
+            if value_node and isinstance(value_node, ast.List):
+                return len(value_node.elts)
+            if value_node and isinstance(value_node, ast.Constant) and isinstance(value_node.value, str):
+                return len(value_node.value) + 1
+            return 1
+
+        # Constant(int)
+        if isinstance(count_node, ast.Constant) and isinstance(count_node.value, int):
+            return count_node.value
+
+        if mode == 'global':
+            # Name → SymbolTable + _define_constants
+            if isinstance(count_node, ast.Name):
+                ArrayCount: int = 1
+                if self.Trans.SymbolTable.has(count_node.id):
+                    sym_info: Any = self.Trans.SymbolTable[count_node.id]
+                    if isinstance(sym_info.value, int):
+                        ArrayCount = sym_info.value
+                if ArrayCount == 1 and count_node.id in Gen._define_constants:
+                    def_val: Any = Gen._define_constants[count_node.id]
+                    if isinstance(def_val, int):
+                        ArrayCount = def_val
+                return ArrayCount
+            # Attribute / BinOp → _eval_global_count
+            if isinstance(count_node, (ast.Attribute, ast.BinOp)):
+                eval_fn: Any = getattr(self, '_eval_global_count', None)
+                if eval_fn is not None:
+                    ev: int | None = eval_fn(count_node, Gen)
+                    if ev is not None:
+                        return ev
+                return 1
+        else:
+            # local mode → TryEvalConstExpr
+            eval_count: Any = CTypeInfo.TryEvalConstExpr(count_node, self.Trans.SymbolTable)
+            if eval_count is not None and isinstance(eval_count, int) and eval_count > 0:
+                return eval_count
+            return 1
+
+        return 1
+
+    def ResolveAnnotationType(self, annotation: ast.expr) -> CTypeInfo | None:
+        """解析注解类型，BinOp(BitOr) 优先使用 MergeTypes，其他使用 FromNode。
+
+        统一处理函数返回类型和参数类型的 BinOp 联合类型解析。
+        """
+        if isinstance(annotation, ast.BinOp) and isinstance(annotation.op, ast.BitOr):
+            merger: Any = getattr(self.Trans, 'TypeMergeHandler', None)
+            if merger:
+                info: CTypeInfo | None = merger.MergeTypes(annotation)
+                if info is not None and isinstance(info, CTypeInfo):
+                    return info
+        return CTypeInfo.FromNode(annotation, self.Trans.SymbolTable)
+
+    def CollectAnnAssignMember(
+        self, item: ast.AST, Gen: Any
+    ) -> tuple[str, _ir.Type, CTypeInfo | None] | None:
+        """从 ast.AnnAssign 节点解析成员信息。
+
+        返回 (VarName, MemberType, TypeInfo)；TypeInfo 为 None 表示解析回退到 i32。
+        非 AnnAssign/Name 目标时返回 None。
+        """
+        if not isinstance(item, ast.AnnAssign) or not isinstance(item.target, ast.Name):
+            return None
+        VarName: str = item.target.id
+        try:
+            TypeInfo: CTypeInfo | None = self.ResolveAnnotationType(item.annotation)
+            if TypeInfo is None:
+                TypeInfo = CTypeInfo()
+                TypeInfo.BaseType = t.CInt()
+            MemberType: _ir.Type = Gen._ctype_to_llvm(TypeInfo)
+            if isinstance(MemberType, _ir.VoidType):
+                MemberType = _ir.PointerType(_ir.IntType(8))
+            return VarName, MemberType, TypeInfo
+        except Exception as e:
+            _vlog().warning(f"HandlesBase: 忽略异常 {e}", exc_info=e)
+            return VarName, _ir.IntType(32), None
+
+    def LookupFunctionSymbol(self, name: str, *, module_path: str | None = None) -> CTypeInfo | None:
+        """查找函数符号，先尝试 module_path.name，再回退到 name。
+
+        统一处理 HandlesExprCall / HandlesAssign 中重复的二级查找模式。
+        返回 CTypeInfo（不限定 IsFunction），由调用方检查标志位。
+        """
+        st = self.Trans.SymbolTable
+        if module_path:
+            sym: CTypeInfo | None = st.lookup(f'{module_path}.{name}')
+            if sym:
+                return sym
+        return st.lookup(name)
+
+    def BuildLLVMFuncTypeFromSig(
+        self,
+        sym_info: CTypeInfo,
+        Gen: Any,
+        *,
+        mangled_name: str | None = None,
+        use_infer_fallback: bool = False,
+    ) -> tuple[Any, list[Any], bool] | None:
+        """从 CTypeInfo 函数签名构建 LLVM 函数类型。
+
+        返回 (ret_type, llvm_param_types, is_variadic)，非函数返回 None。
+        统一处理 FuncPtrReturn/FuncPtrParams → ToLLVM 转换、VoidType 回退。
+
+        Args:
+            mangled_name: 用于 _infer_return_type + stub 查找回退
+            use_infer_fallback: 为 True 时启用 _infer_return_type + stub 查找回退链
+        """
+        if not sym_info.IsFunction:
+            return None
+        is_variadic: bool = sym_info.IsVariadic
+        ret_type_info = sym_info.FuncPtrReturn
+        if isinstance(ret_type_info, CTypeInfo) and ret_type_info.BaseType:
+            ret_type: Any = ret_type_info.ToLLVM(Gen)
+        elif use_infer_fallback and mangled_name:
+            inferred: Any = Gen._infer_return_type(mangled_name)
+            if isinstance(inferred, _ir.IntType) and inferred.width == 32:
+                try:
+                    stub_ft: Any = self.Trans.ImportHandler._LookupStubFuncType(mangled_name, Gen)
+                    if stub_ft and hasattr(stub_ft, 'return_type'):
+                        inferred = stub_ft.return_type
+                except Exception:
+                    pass
+            ret_type = inferred
+        else:
+            ret_type = Gen._CType2LLVM('i32', False)
+        param_type_infos = [pt for _, pt in (sym_info.FuncPtrParams or [])]
+        if isinstance(ret_type, _ir.VoidType):
+            ret_type = _ir.IntType(32)
+        llvm_param_types: list[Any] = []
+        for pt in param_type_infos:
+            if isinstance(pt, CTypeInfo) and pt.BaseType:
+                lp: Any = pt.ToLLVM(Gen)
+            else:
+                lp = Gen._CType2LLVM(pt if isinstance(pt, str) else 'i32', '*' in pt if isinstance(pt, str) else False)
+            if isinstance(lp, _ir.VoidType):
+                lp = _ir.IntType(8).as_pointer()
+            llvm_param_types.append(lp)
+        return ret_type, llvm_param_types, is_variadic
+
+    def GetOrCreateFuncDecl(
+        self,
+        name: str,
+        ret_type: Any,
+        param_types: list[Any],
+        Gen: Any,
+        *,
+        is_variadic: bool = False,
+        replace_name: str | None = None,
+    ) -> Any:
+        """创建或替换 LLVM 函数声明。
+
+        若 name 已存在且类型不匹配，通过 _replace_function_decl 替换。
+        replace_name 传递给 _replace_function_decl（通常为未 mangle 的 func_name）。
+        """
+        if name not in Gen.functions:
+            func_type = _ir.FunctionType(ret_type, param_types, var_arg=is_variadic)
+            func_decl = _ir.Function(Gen.module, func_type, name=name)
+            Gen.functions[name] = func_decl
+        else:
+            existing = Gen.functions[name]
+            existing_type = getattr(existing, 'ftype', None)
+            new_type = _ir.FunctionType(ret_type, param_types, var_arg=is_variadic)
+            if existing_type and existing_type != new_type:
+                replaced = self.Trans.FunctionHandler._replace_function_decl(Gen, replace_name or name, new_type)
+                if replaced and replaced != existing:
+                    Gen.functions[name] = replaced
+        return Gen.functions[name]
+
+    def GetOrCreateStubFuncDecl(
+        self,
+        decl_name: str,
+        stub_func_type: Any,
+        Gen: Any,
+        *,
+        alias: str | None = None,
+        check_existing: bool = True,
+    ) -> Any:
+        """创建 stub 函数声明，可选注册别名。
+
+        check_existing=False 时跳过存在性检查（用于确定不存在的场景）。
+        """
+        if check_existing and decl_name in Gen.functions:
+            func_decl = Gen.functions[decl_name]
+        else:
+            func_decl = _ir.Function(Gen.module, stub_func_type, name=decl_name)
+            Gen.functions[decl_name] = func_decl
+        if alias and alias != decl_name:
+            if not check_existing or alias not in Gen.functions:
+                Gen.functions[alias] = func_decl
+        return func_decl
+
+
+StrictMode: bool = _config.mode == 'strict'