How far are we from `@dataclass`

[junrushao]

Resolved by

• [Stacked PR] Introduce @tvm_ffi.dataclasses.c_class #477
• [Stacked PR] Introduce @tvm_ffi.dataclasses.py_class #499

---

• Init: generates __init__ (we implemented some of the logics in @c_class)

  • flag init=True in @dataclass
  • flag init=True in dataclasses.field
  • ✅ run __post_init__ if presents done
  • ✅ default=MISSING, default_factory=MISSING in dataclasses.field
  • InitVar
  • ClassVar
  • ✅ kw_only=False in @dataclass feat: add kw_only support for dataclass init generation #384
  • ✅ kw_only=MISSING in dataclasses.field feat: add kw_only support for dataclass init generation #384
  • ✅ dataclasses.KW_ONLY feat: add kw_only support for dataclass init generation #384

• Repr: generates __repr__ feat: add DFS-based ffi.ReprPrint for unified object repr #454

  • ✅ flag repr=True in @dataclass
  • ✅ flag repr=True in dataclasses.field

• Copy: Generate copy interface feat: add __copy__, __deepcopy__, and __replace__ for FFI objects #438

  • def __copy__(self)
  • def __deepcopy__(self, memo)
  • def __replace__(self, **changes) and dataclasses.replace

• Equality

  • eq=True in @dataclass: generates __eq__ and __ne__

• Comparison

  • order=False in @dataclass: generates __lt__, __le__, __gt__, and __ge__,
  • compare=True in dataclasses.field

• Mutability and extra slots:

  • ✅ slots: feat: Restrict __slots__=() for subclasses of tvm_ffi.Object by default #364
  • ❌ frozen=False: mutability
  • ❌ weakref_slot=False

• Hashing

  • unsafe_hash=False
  • hash=None

Misc

• match_args=True in @dataclass
• metadata=None in dataclasses.field
• doc=None in dataclasses.field
• dataclasses.fields
• dataclasses.asdict
• dataclasses.astuple
• dataclasses.make_dataclass
• dataclasses.is_dataclass