use dataclass_transform!

selfdrive/car/data_structures.py

@@ -1,6 +1,6 @@
-from dataclasses import dataclass, field, is_dataclass
+from dataclasses import dataclass as _dataclass, field, is_dataclass
 from enum import Enum, StrEnum as _StrEnum, auto
-from typing import get_origin
+from typing import dataclass_transform, get_origin
 
 auto_obj = object()
 
@@ -9,7 +9,8 @@ def auto_field():
   return auto_obj
 
 
-def apply_auto_fields(cls=None, /, **kwargs):
+@dataclass_transform()
+def auto_dataclass(cls=None, /, **kwargs):
   cls_annotations = cls.__dict__.get('__annotations__', {})
   for name, typ in cls_annotations.items():
     current_value = getattr(cls, name, None)
@@ -25,7 +26,8 @@ def apply_auto_fields(cls=None, /, **kwargs):
         setattr(cls, name, field(default=next(iter(origin_typ))))
       else:
         raise TypeError(f"Unsupported type for auto_field: {origin_typ}")
-  return cls
+
+  return _dataclass(cls, **kwargs)
 
 
 class StrEnum(_StrEnum):
@@ -35,8 +37,7 @@ class StrEnum(_StrEnum):
     return name
 
 
-@dataclass
-@apply_auto_fields
+@auto_dataclass
 class RadarData:
   errors: list['Error'] = auto_field()
   points: list['RadarPoint'] = auto_field()
@@ -46,8 +47,7 @@ class RadarData:
     fault = auto()
     wrongConfig = auto()
 
-  @dataclass
-  @apply_auto_fields
+  @auto_dataclass
   class RadarPoint:
     trackId: int = auto_field()  # no trackId reuse
 
@@ -64,8 +64,7 @@ class RadarData:
     measured: bool = auto_field()
 
 
-@dataclass
-@apply_auto_fields
+@auto_dataclass
 class CarParams:
   carName: str = auto_field()
   carFingerprint: str = auto_field()
@@ -102,8 +101,7 @@ class CarParams:
   lateralParams: 'CarParams.LateralParams' = field(default_factory=lambda: CarParams.LateralParams())
   lateralTuning: 'CarParams.LateralTuning' = field(default_factory=lambda: CarParams.LateralTuning())
 
-  @dataclass
-  @apply_auto_fields
+  @auto_dataclass
   class LateralTuning:
     def init(self, which: str):
       assert which in ('pid', 'torque'), 'Invalid union type'
@@ -114,20 +112,17 @@ class CarParams:
     pid: 'CarParams.LateralPIDTuning' = field(default_factory=lambda: CarParams.LateralPIDTuning())
     torque: 'CarParams.LateralTorqueTuning' = field(default_factory=lambda: CarParams.LateralTorqueTuning())
 
-  @dataclass
-  @apply_auto_fields
+  @auto_dataclass
   class SafetyConfig:
     safetyModel: 'CarParams.SafetyModel' = field(default_factory=lambda: CarParams.SafetyModel.silent)
     safetyParam: int = auto_field()
 
-  @dataclass
-  @apply_auto_fields
+  @auto_dataclass
   class LateralParams:
     torqueBP: list[int] = auto_field()
     torqueV: list[int] = auto_field()
 
-  @dataclass
-  @apply_auto_fields
+  @auto_dataclass
   class LateralPIDTuning:
     kpBP: list[float] = auto_field()
     kpV: list[float] = auto_field()
@@ -135,8 +130,7 @@ class CarParams:
     kiV: list[float] = auto_field()
     kf: float = auto_field()
 
-  @dataclass
-  @apply_auto_fields
+  @auto_dataclass
   class LateralTorqueTuning:
     useSteeringAngle: bool = auto_field()
     kp: float = auto_field()
@@ -176,8 +170,7 @@ class CarParams:
 
   wheelSpeedFactor: float = auto_field()  # Multiplier on wheels speeds to computer actual speeds
 
-  @dataclass
-  @apply_auto_fields
+  @auto_dataclass
   class LongitudinalPIDTuning:
     kpBP: list[float] = auto_field()
     kpV: list[float] = auto_field()
@@ -230,8 +223,7 @@ class CarParams:
     direct = auto()  # Electric vehicle or other direct drive
     cvt = auto()
 
-  @dataclass
-  @apply_auto_fields
+  @auto_dataclass
   class CarFw:
     ecu: 'CarParams.Ecu' = field(default_factory=lambda: CarParams.Ecu.unknown)
     fwVersion: bytes = auto_field()