prompt: You will be provided with a partial code base and an issue statement explaining a problem to resolve.
  <issue>
  AttributeError: 'StructureTopLevel' object has no attribute 'contract'
  On 0x0cf55d57d241161e0ec68e72cbb175dbfe84173a
  
  Here there should be a different case for top-level elements and non-top-level:
  
  https://github.com/crytic/slither/blob/c0c581b3ba830b6ce8dc3f4be82592a7a42e9752/slither/core/solidity_types/user_defined_type.py#L65-L66
  AttributeError: 'StructureTopLevel' object has no attribute 'contract'
  On 0x0cf55d57d241161e0ec68e72cbb175dbfe84173a
  
  Here there should be a different case for top-level elements and non-top-level:
  
  https://github.com/crytic/slither/blob/c0c581b3ba830b6ce8dc3f4be82592a7a42e9752/slither/core/solidity_types/user_defined_type.py#L65-L66
  
  </issue>
  <code>
  [start of slither/core/solidity_types/user_defined_type.py]
  1 from typing import Union, TYPE_CHECKING, Tuple
  2 import math
  3 
  4 from slither.core.solidity_types.type import Type
  5 from slither.exceptions import SlitherException
  6 
  7 if TYPE_CHECKING:
  8     from slither.core.declarations.structure import Structure
  9     from slither.core.declarations.enum import Enum
  10     from slither.core.declarations.contract import Contract
  11 
  12 # pylint: disable=import-outside-toplevel
  13 class UserDefinedType(Type):
  14     def __init__(self, t):
  15         from slither.core.declarations.structure import Structure
  16         from slither.core.declarations.enum import Enum
  17         from slither.core.declarations.contract import Contract
  18 
  19         assert isinstance(t, (Contract, Enum, Structure))
  20         super().__init__()
  21         self._type = t
  22 
  23     @property
  24     def type(self) -> Union["Contract", "Enum", "Structure"]:
  25         return self._type
  26 
  27     @property
  28     def storage_size(self) -> Tuple[int, bool]:
  29         from slither.core.declarations.structure import Structure
  30         from slither.core.declarations.enum import Enum
  31         from slither.core.declarations.contract import Contract
  32 
  33         if isinstance(self._type, Contract):
  34             return 20, False
  35         if isinstance(self._type, Enum):
  36             return int(math.ceil(math.log2(len(self._type.values)) / 8)), False
  37         if isinstance(self._type, Structure):
  38             # todo there's some duplicate logic here and slither_core, can we refactor this?
  39             slot = 0
  40             offset = 0
  41             for elem in self._type.elems_ordered:
  42                 size, new_slot = elem.type.storage_size
  43                 if new_slot:
  44                     if offset > 0:
  45                         slot += 1
  46                         offset = 0
  47                 elif size + offset > 32:
  48                     slot += 1
  49                     offset = 0
  50 
  51                 if new_slot:
  52                     slot += math.ceil(size / 32)
  53                 else:
  54                     offset += size
  55             if offset > 0:
  56                 slot += 1
  57             return slot * 32, True
  58         to_log = f"{self} does not have storage size"
  59         raise SlitherException(to_log)
  60 
  61     def __str__(self):
  62         from slither.core.declarations.structure import Structure
  63         from slither.core.declarations.enum import Enum
  64 
  65         if isinstance(self.type, (Enum, Structure)):
  66             return str(self.type.contract) + "." + str(self.type.name)
  67         return str(self.type.name)
  68 
  69     def __eq__(self, other):
  70         if not isinstance(other, UserDefinedType):
  71             return False
  72         return self.type == other.type
  73 
  74     def __hash__(self):
  75         return hash(str(self))
  76
  [end of slither/core/solidity_types/user_defined_type.py]
  </code>
  
  I need you to solve this issue by generating a single patch file that I can apply directly to this repository using git apply. Please respond with a single patch file in the following format.
  <patch>
  diff --git a/file.py b/file.py
  --- a/file.py
  +++ b/file.py
  @@ -1,27 +1,35 @@
   def euclidean(a, b):
  -    while b:
  -        a, b = b, a % b
  -    return a
  +    if b == 0:
  +        return a
  +    return euclidean(b, a % b)
   
   
   def bresenham(x0, y0, x1, y1):
       points = []
       dx = abs(x1 - x0)
       dy = abs(y1 - y0)
  -    sx = 1 if x0 < x1 else -1
  -    sy = 1 if y0 < y1 else -1
  -    err = dx - dy
  +    x, y = x0, y0
  +    sx = -1 if x0 > x1 else 1
  +    sy = -1 if y0 > y1 else 1
   
  -    while True:
  -        points.append((x0, y0))
  -        if x0 == x1 and y0 == y1:
  -            break
  -        e2 = 2 * err
  -        if e2 > -dy:
  -            err -= dy
  -            x0 += sx
  -        if e2 < dx:
  -            err += dx
  -            y0 += sy
  +    if dx > dy:
  +        err = dx / 2.0
  +        while x != x1:
  +            points.append((x, y))
  +            err -= dy
  +            if err < 0:
  +                y += sy
  +                err += dx
  +            x += sx
  +    else:
  +        err = dy / 2.0
  +        while y != y1:
  +            points.append((x, y))
  +            err -= dx
  +            if err < 0:
  +                x += sx
  +                err += dy
  +            y += sy
  +
  +    points.append((x, y))
       return points
  
  </patch>
golden_diff: diff --git a/slither/core/solidity_types/user_defined_type.py b/slither/core/solidity_types/user_defined_type.py
  --- a/slither/core/solidity_types/user_defined_type.py
  +++ b/slither/core/solidity_types/user_defined_type.py
  @@ -59,12 +59,13 @@
           raise SlitherException(to_log)
   
       def __str__(self):
  -        from slither.core.declarations.structure import Structure
  -        from slither.core.declarations.enum import Enum
  +        from slither.core.declarations.structure_contract import StructureContract
  +        from slither.core.declarations.enum_contract import EnumContract
   
  -        if isinstance(self.type, (Enum, Structure)):
  -            return str(self.type.contract) + "." + str(self.type.name)
  -        return str(self.type.name)
  +        type_used = self.type
  +        if isinstance(type_used, (EnumContract, StructureContract)):
  +            return str(type_used.contract) + "." + str(type_used.name)
  +        return str(type_used.name)
   
       def __eq__(self, other):
           if not isinstance(other, UserDefinedType):
  
verification_info: {"golden_diff": "diff --git a/slither/core/solidity_types/user_defined_type.py b/slither/core/solidity_types/user_defined_type.py\n--- a/slither/core/solidity_types/user_defined_type.py\n+++ b/slither/core/solidity_types/user_defined_type.py\n@@ -59,12 +59,13 @@\n         raise SlitherException(to_log)\n \n     def __str__(self):\n-        from slither.core.declarations.structure import Structure\n-        from slither.core.declarations.enum import Enum\n+        from slither.core.declarations.structure_contract import StructureContract\n+        from slither.core.declarations.enum_contract import EnumContract\n \n-        if isinstance(self.type, (Enum, Structure)):\n-            return str(self.type.contract) + \".\" + str(self.type.name)\n-        return str(self.type.name)\n+        type_used = self.type\n+        if isinstance(type_used, (EnumContract, StructureContract)):\n+            return str(type_used.contract) + \".\" + str(type_used.name)\n+        return str(type_used.name)\n \n     def __eq__(self, other):\n         if not isinstance(other, UserDefinedType):\n", "issue": "AttributeError: 'StructureTopLevel' object has no attribute 'contract'\nOn 0x0cf55d57d241161e0ec68e72cbb175dbfe84173a\r\n\r\nHere there should be a different case for top-level elements and non-top-level:\r\n\r\nhttps://github.com/crytic/slither/blob/c0c581b3ba830b6ce8dc3f4be82592a7a42e9752/slither/core/solidity_types/user_defined_type.py#L65-L66\nAttributeError: 'StructureTopLevel' object has no attribute 'contract'\nOn 0x0cf55d57d241161e0ec68e72cbb175dbfe84173a\r\n\r\nHere there should be a different case for top-level elements and non-top-level:\r\n\r\nhttps://github.com/crytic/slither/blob/c0c581b3ba830b6ce8dc3f4be82592a7a42e9752/slither/core/solidity_types/user_defined_type.py#L65-L66\n", "before_files": [{"content": "from typing import Union, TYPE_CHECKING, Tuple\nimport math\n\nfrom slither.core.solidity_types.type import Type\nfrom slither.exceptions import SlitherException\n\nif TYPE_CHECKING:\n    from slither.core.declarations.structure import Structure\n    from slither.core.declarations.enum import Enum\n    from slither.core.declarations.contract import Contract\n\n# pylint: disable=import-outside-toplevel\nclass UserDefinedType(Type):\n    def __init__(self, t):\n        from slither.core.declarations.structure import Structure\n        from slither.core.declarations.enum import Enum\n        from slither.core.declarations.contract import Contract\n\n        assert isinstance(t, (Contract, Enum, Structure))\n        super().__init__()\n        self._type = t\n\n    @property\n    def type(self) -> Union[\"Contract\", \"Enum\", \"Structure\"]:\n        return self._type\n\n    @property\n    def storage_size(self) -> Tuple[int, bool]:\n        from slither.core.declarations.structure import Structure\n        from slither.core.declarations.enum import Enum\n        from slither.core.declarations.contract import Contract\n\n        if isinstance(self._type, Contract):\n            return 20, False\n        if isinstance(self._type, Enum):\n            return int(math.ceil(math.log2(len(self._type.values)) / 8)), False\n        if isinstance(self._type, Structure):\n            # todo there's some duplicate logic here and slither_core, can we refactor this?\n            slot = 0\n            offset = 0\n            for elem in self._type.elems_ordered:\n                size, new_slot = elem.type.storage_size\n                if new_slot:\n                    if offset > 0:\n                        slot += 1\n                        offset = 0\n                elif size + offset > 32:\n                    slot += 1\n                    offset = 0\n\n                if new_slot:\n                    slot += math.ceil(size / 32)\n                else:\n                    offset += size\n            if offset > 0:\n                slot += 1\n            return slot * 32, True\n        to_log = f\"{self} does not have storage size\"\n        raise SlitherException(to_log)\n\n    def __str__(self):\n        from slither.core.declarations.structure import Structure\n        from slither.core.declarations.enum import Enum\n\n        if isinstance(self.type, (Enum, Structure)):\n            return str(self.type.contract) + \".\" + str(self.type.name)\n        return str(self.type.name)\n\n    def __eq__(self, other):\n        if not isinstance(other, UserDefinedType):\n            return False\n        return self.type == other.type\n\n    def __hash__(self):\n        return hash(str(self))\n", "path": "slither/core/solidity_types/user_defined_type.py"}]}