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Added check for the use of a NewType in a class pattern. This addre…#10969

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erictraut merged 1 commit intomainfrom
issue-10784
Sep 28, 2025
Merged

Added check for the use of a NewType in a class pattern. This addre…#10969
erictraut merged 1 commit intomainfrom
issue-10784

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…sses #10784.

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Diff from mypy_primer, showing the effect of this PR on open source code:

sympy (https://github.com/sympy/sympy)
-   .../projects/sympy/sympy/solvers/ode/subscheck.py:149:48 - error: Argument of type "int | Unknown | str" cannot be assigned to parameter "order" of type "str" in function "checkodesol"
-     Type "int | Unknown | str" is not assignable to type "str"
-       "int" is not assignable to "str" (reportArgumentType)
-   .../projects/sympy/sympy/solvers/tests/test_solveset.py:619:16 - error: No overloads for "__new__" match the provided arguments (reportCallIssue)
-   .../projects/sympy/sympy/solvers/tests/test_solveset.py:619:19 - error: Argument of type "Expr | Unknown | float" cannot be assigned to parameter "arg" of type "Expr" in function "__new__"
-     Type "Expr | Unknown | float" is not assignable to type "Expr"
-       "float" is not assignable to "Expr" (reportArgumentType)
-   .../projects/sympy/sympy/solvers/tests/test_solveset.py:624:16 - error: No overloads for "__new__" match the provided arguments (reportCallIssue)
-   .../projects/sympy/sympy/solvers/tests/test_solveset.py:624:19 - error: Argument of type "Expr | Unknown | float" cannot be assigned to parameter "arg" of type "Expr" in function "__new__"
-     Type "Expr | Unknown | float" is not assignable to type "Expr"
-       "float" is not assignable to "Expr" (reportArgumentType)
-   .../projects/sympy/sympy/vector/implicitregion.py:187:18 - error: Operator "/" not supported for types "int | Unknown" and "Alg | Unknown | GaussianRational | MPQ | GaussianInteger | MPZ | Expr | Rational | One | NegativeOne | Zero | Integer | Number | Float | Poly"
+   .../projects/sympy/sympy/vector/implicitregion.py:187:18 - error: Operator "/" not supported for types "int | Unknown" and "Alg | Unknown | GaussianRational | MPQ | GaussianInteger | MPZ | Expr | Zero | Poly | Rational | One | NegativeOne | Integer | Number | Float"
-   .../projects/sympy/sympy/vector/implicitregion.py:188:18 - error: Operator "/" not supported for types "int | Unknown" and "Alg | Unknown | GaussianRational | MPQ | GaussianInteger | MPZ | Expr | Rational | One | NegativeOne | Zero | Integer | Number | Float | Poly"
+   .../projects/sympy/sympy/vector/implicitregion.py:188:18 - error: Operator "/" not supported for types "int | Unknown" and "Alg | Unknown | GaussianRational | MPQ | GaussianInteger | MPZ | Expr | Zero | Poly | Rational | One | NegativeOne | Integer | Number | Float"
-   .../projects/sympy/sympy/vector/implicitregion.py:189:18 - error: Operator "/" not supported for types "int | Unknown" and "Alg | Unknown | GaussianRational | MPQ | GaussianInteger | MPZ | Expr | Rational | One | NegativeOne | Zero | Integer | Number | Float | Poly"
+   .../projects/sympy/sympy/vector/implicitregion.py:189:18 - error: Operator "/" not supported for types "int | Unknown" and "Alg | Unknown | GaussianRational | MPQ | GaussianInteger | MPZ | Expr | Zero | Poly | Rational | One | NegativeOne | Integer | Number | Float"
-   .../projects/sympy/sympy/vector/implicitregion.py:205:18 - error: Operator "*" not supported for types "Unknown | Expr" and "Alg | Unknown | GaussianRational | MPQ | GaussianInteger | MPZ | Expr | Rational | One | NegativeOne | Zero | Integer | Number | Float | Poly"
+   .../projects/sympy/sympy/vector/implicitregion.py:205:18 - error: Operator "*" not supported for types "Unknown | Expr" and "Alg | Unknown | GaussianRational | MPQ | GaussianInteger | MPZ | Expr | Zero | Poly | Rational | One | NegativeOne | Integer | Number | Float"
-   .../projects/sympy/sympy/vector/implicitregion.py:209:18 - error: Operator "*" not supported for types "Unknown | Expr" and "Alg | Unknown | GaussianRational | MPQ | GaussianInteger | MPZ | Expr | Rational | One | NegativeOne | Zero | Integer | Number | Float | Poly"
+   .../projects/sympy/sympy/vector/implicitregion.py:209:18 - error: Operator "*" not supported for types "Unknown | Expr" and "Alg | Unknown | GaussianRational | MPQ | GaussianInteger | MPZ | Expr | Zero | Poly | Rational | One | NegativeOne | Integer | Number | Float"
-   .../projects/sympy/sympy/vector/implicitregion.py:213:18 - error: Operator "*" not supported for types "Unknown | Expr" and "Alg | Unknown | GaussianRational | MPQ | GaussianInteger | MPZ | Expr | Rational | One | NegativeOne | Zero | Integer | Number | Float | Poly"
+   .../projects/sympy/sympy/vector/implicitregion.py:213:18 - error: Operator "*" not supported for types "Unknown | Expr" and "Alg | Unknown | GaussianRational | MPQ | GaussianInteger | MPZ | Expr | Zero | Poly | Rational | One | NegativeOne | Integer | Number | Float"
-   .../projects/sympy/sympy/vector/vector.py:316:20 - error: Operator "*" not supported for types "Unknown | TypeError | Expr" and "Self@Vector"
+   .../projects/sympy/sympy/vector/vector.py:316:20 - error: Operator "*" not supported for types "Unknown | TypeError | Expr | NaN | ComplexInfinity | Rational | Zero | Infinity | NegativeInfinity | Float | _NotImplementedType" and "Self@Vector"
- 37255 errors, 77 warnings, 0 informations
+ 37250 errors, 77 warnings, 0 informations

@erictraut erictraut merged commit 907028c into main Sep 28, 2025
20 checks passed
@erictraut erictraut deleted the issue-10784 branch September 28, 2025 00:58
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