feat(dataclasses): Remove PyClass

README.md

@@ -36,7 +36,7 @@ MLC provides Pythonic dataclasses:
 import mlc.dataclasses as mlcd
 
 @mlcd.py_class("demo.MyClass")
-class MyClass(mlcd.PyClass):
+class MyClass:
   a: int
   b: str
   c: float | None
@@ -60,10 +60,10 @@ AttributeError: 'MyClass' object has no attribute 'non_exist' and no __dict__ fo
 **Serialization**. MLC dataclasses are picklable and JSON-serializable.
 
 ```python
->>> MyClass.from_json(instance.json())
+>>> mlc.json_loads(mlc.json_dumps(instance))
 demo.MyClass(a=12, b='test', c=None)
 
->>> import pickle; pickle.loads(pickle.dumps(instance))
+>>> pickle.loads(pickle.dumps(instance))
 demo.MyClass(a=12, b='test', c=None)
 ```
 
@@ -114,10 +114,11 @@ By annotating IR definitions with `structure`, MLC supports structural equality
 <details><summary> Define a toy IR with `structure`. </summary>
 
 ```python
+import mlc
 import mlc.dataclasses as mlcd
 
 @mlcd.py_class
-class Expr(mlcd.PyClass):
+class Expr:
   def __add__(self, other):
     return Add(a=self, b=other)
 
@@ -146,16 +147,16 @@ class Let(Expr):
 >>> L1 = Let(rhs=x + y, lhs=z, body=z)  # let z = x + y; z
 >>> L2 = Let(rhs=y + z, lhs=x, body=x)  # let x = y + z; x
 >>> L3 = Let(rhs=x + x, lhs=z, body=z)  # let z = x + x; z
->>> L1.eq_s(L2)
+>>> mlc.eq_s(L1, L2)
 True
->>> L1.eq_s(L3, assert_mode=True)
+>>> mlc.eq_s(L1, L3, assert_mode=True)
 ValueError: Structural equality check failed at {root}.rhs.b: Inconsistent binding. RHS has been bound to a different node while LHS is not bound
 ```
 
 **Structural hashing**. The structure of MLC dataclasses can be hashed via `hash_s`, which guarantees if two dataclasses are alpha-equivalent, they will share the same structural hash:
 
 ```python
->>> L1_hash, L2_hash, L3_hash = L1.hash_s(), L2.hash_s(), L3.hash_s()
+>>> L1_hash, L2_hash, L3_hash = mlc.hash_s(L1), mlc.hash_s(L2), mlc.hash_s(L3)
 >>> assert L1_hash == L2_hash
 >>> assert L1_hash != L3_hash
 ```

cpp/registry.h

@@ -18,7 +18,7 @@
 namespace mlc {
 namespace registry {
 
-Any JSONLoads(AnyView json_str);
+Any JSONParse(AnyView json_str);
 Any JSONDeserialize(AnyView json_str, FuncObj *fn_opaque_deserialize);
 Str JSONSerialize(AnyView source, FuncObj *fn_opaque_serialize);
 bool StructuralEqual(AnyView lhs, AnyView rhs, bool bind_free_vars, bool assert_mode);
@@ -646,7 +646,7 @@ inline TypeTable *TypeTable::New() {
   self->SetFunc("mlc.base.DeviceTypeRegister",
                 Func([self](const char *name) { return self->DeviceTypeRegister(name); }).get());
   self->SetFunc("mlc.core.Stringify", Func(::mlc::core::StringifyWithFields).get());
-  self->SetFunc("mlc.core.JSONLoads", Func(::mlc::registry::JSONLoads).get());
+  self->SetFunc("mlc.core.JSONParse", Func(::mlc::registry::JSONParse).get());
   self->SetFunc("mlc.core.JSONSerialize", Func(::mlc::registry::JSONSerialize).get());
   self->SetFunc("mlc.core.JSONDeserialize", Func(::mlc::registry::JSONDeserialize).get());
   self->SetFunc("mlc.core.StructuralEqual", Func(::mlc::registry::StructuralEqual).get());

cpp/structure.cc

@@ -23,7 +23,7 @@ using mlc::core::VisitStructure;
 
 /****************** JSON ******************/
 
-inline Any JSONLoads(const char *json_str, int64_t json_str_len) {
+inline Any JSONParse(const char *json_str, int64_t json_str_len) {
   struct JSONParser {
     Any Parse() {
       SkipWhitespace();
@@ -1552,7 +1552,7 @@ inline Any Deserialize(const char *json_str, int64_t json_str_len, FuncObj *fn_o
   int32_t json_type_index_tensor = -1;
   int32_t json_type_index_opaque = -1;
   // Step 0. Parse JSON string
-  UDict json_obj = JSONLoads(json_str, json_str_len);
+  UDict json_obj = JSONParse(json_str, json_str_len);
   // Step 1. type_key => constructors
   UList type_keys = json_obj->at("type_keys");
   std::vector<FuncObj *> constructors;
@@ -1700,12 +1700,12 @@ Any CopyShallow(AnyView source) { return CopyShallowImpl(source); }
 Any CopyDeep(AnyView source) { return CopyDeepImpl(source); }
 void CopyReplace(int32_t num_args, const AnyView *args, Any *ret) { CopyReplaceImpl(num_args, args, ret); }
 
-Any JSONLoads(AnyView json_str) {
+Any JSONParse(AnyView json_str) {
   if (json_str.type_index == kMLCRawStr) {
-    return ::mlc::JSONLoads(json_str.operator const char *(), -1);
+    return ::mlc::JSONParse(json_str.operator const char *(), -1);
   } else {
     StrObj *js = json_str.operator StrObj *();
-    return ::mlc::JSONLoads(js->data(), js->size());
+    return ::mlc::JSONParse(js->data(), js->size());
   }
 }
 

python/mlc/__init__.py

@@ -13,11 +13,17 @@
     Tensor,
     build_info,
     dep_graph,
+    eq_ptr,
+    eq_s,
+    eq_s_fail_reason,
+    hash_s,
+    json_dumps,
     json_loads,
+    json_parse,
     typing,
 )
 from .core.dep_graph import DepGraph, DepNode
-from .dataclasses import PyClass, c_class, py_class
+from .dataclasses import c_class, py_class
 
 try:
     from ._version import __version__, __version_tuple__  # type: ignore[import-not-found]

python/mlc/core/__init__.py

@@ -3,9 +3,9 @@
 from .dict import Dict
 from .dtype import DataType
 from .error import Error
-from .func import Func, build_info, json_loads
+from .func import Func, build_info, json_parse
 from .list import List
-from .object import Object
+from .object import Object, eq_ptr, eq_s, eq_s_fail_reason, hash_s, json_dumps, json_loads
 from .object_path import ObjectPath
 from .opaque import Opaque
 from .tensor import Tensor

python/mlc/core/func.py

@@ -51,13 +51,13 @@ def decorator(func: _CallableType) -> _CallableType:
         return decorator
 
 
-def json_loads(s: str) -> Any:
-    return _json_loads(s)
+def json_parse(s: str) -> Any:
+    return _json_parse(s)
 
 
 def build_info() -> dict[str, Any]:
     return _build_info()
 
 
-_json_loads = Func.get("mlc.core.JSONLoads")
+_json_parse = Func.get("mlc.core.JSONParse")
 _build_info = Func.get("mlc.core.BuildInfo")

python/mlc/core/object.py

@@ -5,6 +5,11 @@
 
 from mlc._cython import PyAny, TypeInfo, c_class_core
 
+try:
+    from warnings import deprecated  # type: ignore[attr-defined]
+except ImportError:
+    from typing_extensions import deprecated
+
 
 @c_class_core("object.Object")
 class Object(PyAny):
@@ -21,42 +26,6 @@ def id_(self) -> int:
     def is_(self, other: Object) -> bool:
         return isinstance(other, Object) and self._mlc_address == other._mlc_address
 
-    def json(
-        self,
-        fn_opaque_serialize: Callable[[list[typing.Any]], str] | None = None,
-    ) -> str:
-        return super()._mlc_json(fn_opaque_serialize)
-
-    @staticmethod
-    def from_json(
-        json_str: str,
-        fn_opaque_deserialize: Callable[[str], list[typing.Any]] | None = None,
-    ) -> Object:
-        return PyAny._mlc_from_json(json_str, fn_opaque_deserialize)  # type: ignore[attr-defined]
-
-    def eq_s(
-        self,
-        other: Object,
-        *,
-        bind_free_vars: bool = True,
-        assert_mode: bool = False,
-    ) -> bool:
-        return PyAny._mlc_eq_s(self, other, bind_free_vars, assert_mode)  # type: ignore[attr-defined]
-
-    def eq_s_fail_reason(
-        self,
-        other: Object,
-        *,
-        bind_free_vars: bool = True,
-    ) -> tuple[bool, str]:
-        return PyAny._mlc_eq_s_fail_reason(self, other, bind_free_vars)
-
-    def hash_s(self) -> int:
-        return PyAny._mlc_hash_s(self)  # type: ignore[attr-defined]
-
-    def eq_ptr(self, other: typing.Any) -> bool:
-        return isinstance(other, Object) and self._mlc_address == other._mlc_address
-
     def __copy__(self: Object) -> Object:
         return PyAny._mlc_copy_shallow(self)  # type: ignore[attr-defined]
 
@@ -74,7 +43,7 @@ def __hash__(self) -> int:
         return hash((type(self), self._mlc_address))
 
     def __eq__(self, other: typing.Any) -> bool:
-        return self.eq_ptr(other)
+        return eq_ptr(self, other)
 
     def __ne__(self, other: typing.Any) -> bool:
         return not self == other
@@ -103,3 +72,112 @@ def swap(self, other: typing.Any) -> None:
             self._mlc_swap(other)
         else:
             raise TypeError(f"Cannot different types: `{type(self)}` and `{type(other)}`")
+
+    @deprecated(
+        "Method `.json` is deprecated. Use `mlc.json_dumps` instead.",
+        stacklevel=2,
+    )
+    def json(
+        self,
+        fn_opaque_serialize: Callable[[list[typing.Any]], str] | None = None,
+    ) -> str:
+        return json_dumps(self, fn_opaque_serialize)
+
+    @staticmethod
+    @deprecated(
+        "Method `.from_json` is deprecated. Use `mlc.json_loads` instead.",
+        stacklevel=2,
+    )
+    def from_json(
+        json_str: str,
+        fn_opaque_deserialize: Callable[[str], list[typing.Any]] | None = None,
+    ) -> Object:
+        return json_loads(json_str, fn_opaque_deserialize)
+
+    @deprecated(
+        "Method `.eq_s` is deprecated. Use `mlc.eq_s` instead.",
+        stacklevel=2,
+    )
+    def eq_s(
+        self,
+        other: Object,
+        *,
+        bind_free_vars: bool = True,
+        assert_mode: bool = False,
+    ) -> bool:
+        return eq_s(self, other, bind_free_vars=bind_free_vars, assert_mode=assert_mode)
+
+    @deprecated(
+        "Method `.eq_s_fail_reason` is deprecated. Use `mlc.eq_s_fail_reason` instead.",
+        stacklevel=2,
+    )
+    def eq_s_fail_reason(
+        self,
+        other: Object,
+        *,
+        bind_free_vars: bool = True,
+    ) -> tuple[bool, str]:
+        return eq_s_fail_reason(self, other, bind_free_vars=bind_free_vars)
+
+    @deprecated(
+        "Method `.hash_s` is deprecated. Use `mlc.hash_s` instead.",
+        stacklevel=2,
+    )
+    def hash_s(self) -> int:
+        return hash_s(self)
+
+    @deprecated(
+        "Method `.eq_ptr` is deprecated. Use `mlc.eq_ptr` instead.",
+        stacklevel=2,
+    )
+    def eq_ptr(self, other: typing.Any) -> bool:
+        return eq_ptr(self, other)
+
+
+def json_dumps(
+    object: typing.Any,
+    fn_opaque_serialize: Callable[[list[typing.Any]], str] | None = None,
+) -> str:
+    assert isinstance(object, Object), f"Expected `mlc.Object`, got `{type(object)}`"
+    return object._mlc_json(fn_opaque_serialize)  # type: ignore[attr-defined]
+
+
+def json_loads(
+    json_str: str,
+    fn_opaque_deserialize: Callable[[str], list[typing.Any]] | None = None,
+) -> Object:
+    return PyAny._mlc_from_json(json_str, fn_opaque_deserialize)  # type: ignore[attr-defined]
+
+
+def eq_s(
+    lhs: typing.Any,
+    rhs: typing.Any,
+    *,
+    bind_free_vars: bool = True,
+    assert_mode: bool = False,
+) -> bool:
+    assert isinstance(lhs, Object), f"Expected `mlc.Object`, got `{type(lhs)}`"
+    assert isinstance(rhs, Object), f"Expected `mlc.Object`, got `{type(rhs)}`"
+    return PyAny._mlc_eq_s(lhs, rhs, bind_free_vars, assert_mode)  # type: ignore[attr-defined]
+
+
+def eq_s_fail_reason(
+    lhs: typing.Any,
+    rhs: typing.Any,
+    *,
+    bind_free_vars: bool = True,
+) -> tuple[bool, str]:
+    assert isinstance(lhs, Object), f"Expected `mlc.Object`, got `{type(lhs)}`"
+    assert isinstance(rhs, Object), f"Expected `mlc.Object`, got `{type(rhs)}`"
+    return PyAny._mlc_eq_s_fail_reason(lhs, rhs, bind_free_vars)
+
+
+def hash_s(obj: typing.Any) -> int:
+    assert isinstance(obj, Object), f"Expected `mlc.Object`, got `{type(obj)}`"
+    return PyAny._mlc_hash_s(obj)  # type: ignore[attr-defined]
+
+
+def eq_ptr(lhs: typing.Any, rhs: typing.Any) -> bool:
+    assert isinstance(lhs, Object), f"Expected `mlc.Object`, got `{type(lhs)}`"
+    assert isinstance(rhs, Object), f"Expected `mlc.Object`, got `{type(rhs)}`"
+    return lhs._mlc_address == rhs._mlc_address

python/mlc/dataclasses/__init__.py

@@ -1,5 +1,7 @@
+from mlc.core.object import Object as PyClass  # for backward compatibility
+
 from .c_class import c_class
-from .py_class import PyClass, py_class
+from .py_class import py_class
 from .utils import (
     Structure,
     add_vtable_method,