⚡️♻️ remove redundant dtype.__new__ overloads for faster type-checking

Author: jorenham

src/numpy-stubs/@test/static/accept/dtype.pyi

@@ -1,66 +1,60 @@
 import ctypes as ct
-import datetime as dt
 from decimal import Decimal
 from fractions import Fraction
-from typing import Any, Literal, TypeAlias
 from typing_extensions import LiteralString, assert_type
 
 import numpy as np
 from numpy.dtypes import StringDType
 
-# a combination of likely `object` dtype-like candidates (no `_co`)
-_PyObjectLike: TypeAlias = Decimal | Fraction | dt.datetime | dt.timedelta
-
 dtype_U: np.dtype[np.str_]
 dtype_V: np.dtype[np.void]
 dtype_i8: np.dtype[np.int64]
 
-py_int_co: type[int | bool]
-py_float_co: type[float | int | bool]
-py_complex_co: type[complex | float | int | bool]
-py_object: type[_PyObjectLike]
+py_int_co: type[int]
+py_float_co: type[float]
+py_complex_co: type[complex]
+py_object: type
 py_character: type[str | bytes]
 py_flexible: type[str | bytes | memoryview]
 
 ct_floating: type[ct.c_float | ct.c_double | ct.c_longdouble]
 ct_number: type[ct.c_uint8 | ct.c_float]
 ct_generic: type[ct.c_bool | ct.c_char]
 
-cs_integer: Literal["u1", "<i2", "L"]
-cs_number: Literal["=L", "i", "c16"]
-cs_flex: Literal[">V", "S"]
-cs_generic: Literal["H", "U", "h", "|M8[Y]", "?"]
-
-dt_inexact: np.dtype[np.inexact]
 dt_string: StringDType
 
 assert_type(np.dtype(np.float64), np.dtype[np.float64])
 assert_type(np.dtype(np.float64, metadata={"test": "test"}), np.dtype[np.float64])
 assert_type(np.dtype(np.int64), np.dtype[np.int64])
 
 # String aliases
-assert_type(np.dtype("float64"), np.dtype[np.float64])
-assert_type(np.dtype("float32"), np.dtype[np.float32])
-assert_type(np.dtype("int64"), np.dtype[np.int64])
-assert_type(np.dtype("int32"), np.dtype[np.int32])
 assert_type(np.dtype("bool"), np.dtype[np.bool])
+assert_type(np.dtype("int32"), np.dtype[np.int32])
+assert_type(np.dtype("int64"), np.dtype[np.int64])
+assert_type(np.dtype("float32"), np.dtype[np.float32])
+assert_type(np.dtype("float64"), np.dtype[np.float64])
 assert_type(np.dtype("bytes"), np.dtype[np.bytes_])
 assert_type(np.dtype("str"), np.dtype[np.str_])
 
 # Python types
 assert_type(np.dtype(bool), np.dtype[np.bool])
-assert_type(np.dtype(py_int_co), np.dtype[np.int_ | np.bool])
-assert_type(np.dtype(int), np.dtype[np.int_ | np.bool])
-assert_type(np.dtype(py_float_co), np.dtype[np.float64 | np.int_ | np.bool])
-assert_type(np.dtype(float), np.dtype[np.float64 | np.int_ | np.bool])
-assert_type(np.dtype(py_complex_co), np.dtype[np.complex128 | np.float64 | np.int_ | np.bool])
-assert_type(np.dtype(complex), np.dtype[np.complex128 | np.float64 | np.int_ | np.bool])
-assert_type(np.dtype(py_object), np.dtype[np.object_ | Any])
+assert_type(np.dtype(int), np.dtype[np.int_])
+assert_type(np.dtype(float), np.dtype[np.float64])
+assert_type(np.dtype(complex), np.dtype[np.complex128])
+assert_type(np.dtype(object), np.dtype[np.object_])
 assert_type(np.dtype(str), np.dtype[np.str_])
 assert_type(np.dtype(bytes), np.dtype[np.bytes_])
-assert_type(np.dtype(py_character), np.dtype[np.character])
 assert_type(np.dtype(memoryview), np.dtype[np.void])
-assert_type(np.dtype(py_flexible), np.dtype[np.flexible])
+
+assert_type(np.dtype(np.signedinteger), np.dtype[np.signedinteger])
+assert_type(np.dtype(np.unsignedinteger), np.dtype[np.unsignedinteger])
+assert_type(np.dtype(np.integer), np.dtype[np.integer])
+assert_type(np.dtype(np.floating), np.dtype[np.floating])
+assert_type(np.dtype(np.complexfloating), np.dtype[np.complexfloating])
+assert_type(np.dtype(np.inexact), np.dtype[np.inexact])
+assert_type(np.dtype(np.number), np.dtype[np.number])
+# NOTE: `character` and `flexible` always fail on mypy because of some mypy bug
+assert_type(np.dtype(np.generic), np.dtype[np.generic])
 
 assert_type(np.dtype(Decimal), np.dtype[np.object_])
 assert_type(np.dtype(Fraction), np.dtype[np.object_])
@@ -70,25 +64,22 @@ assert_type(np.dtype("u1"), np.dtype[np.uint8])
 assert_type(np.dtype("int_"), np.dtype[np.intp])
 assert_type(np.dtype("longlong"), np.dtype[np.longlong])
 assert_type(np.dtype(">g"), np.dtype[np.longdouble])
-assert_type(np.dtype(cs_integer), np.dtype[np.integer])
-assert_type(np.dtype(cs_number), np.dtype[np.number])
-assert_type(np.dtype(cs_flex), np.dtype[np.flexible])
-assert_type(np.dtype(cs_generic), np.dtype[np.generic])
 
 # ctypes
-assert_type(np.dtype(ct.c_double), np.dtype[np.float64])
-assert_type(np.dtype(ct.c_longlong), np.dtype[np.longlong])
-assert_type(np.dtype(ct.c_uint32), np.dtype[np.uint32])
 assert_type(np.dtype(ct.c_bool), np.dtype[np.bool])
-assert_type(np.dtype(ct.c_char), np.dtype[np.bytes_])
+assert_type(np.dtype(ct.c_uint32), np.dtype[np.uint32])
+assert_type(np.dtype(ct.c_ssize_t), np.dtype[np.intp])
+assert_type(np.dtype(ct.c_longlong), np.dtype[np.longlong])
+assert_type(np.dtype(ct.c_double), np.dtype[np.double])
 assert_type(np.dtype(ct.py_object), np.dtype[np.object_])
+assert_type(np.dtype(ct.c_char), np.dtype[np.bytes_])
 
 # Special case for None
 assert_type(np.dtype(None), np.dtype[np.float64])
 
 # Dypes of dtypes
 assert_type(np.dtype(np.dtype(np.float64)), np.dtype[np.float64])
-assert_type(np.dtype(dt_inexact), np.dtype[np.inexact])
+assert_type(np.dtype(np.dtype(np.inexact)), np.dtype[np.inexact])
 
 # Parameterized dtypes
 assert_type(np.dtype("S8"), np.dtype)