Alex Waygood 55bccf6680 [red-knot] Fix edge case for binary-expression inference where the lhs and rhs are the exact same type (#13823) ... ## Summary This fixes an edge case that @carljm and I missed when implementing https://github.com/astral-sh/ruff/pull/13800. Namely, if the left-hand operand is the _exact same type_ as the right-hand operand, the reflected dunder on the right-hand operand is never tried: ```pycon >>> class Foo: ... def __radd__(self, other): ... return 42 ... >>> Foo() + Foo() Traceback (most recent call last): File "<python-input-1>", line 1, in <module> Foo() + Foo() ~~~~~~^~~~~~~ TypeError: unsupported operand type(s) for +: 'Foo' and 'Foo' ``` This edge case _is_ covered in Brett's blog at https://snarky.ca/unravelling-binary-arithmetic-operations-in-python/, but I missed it amongst all the other subtleties of this algorithm. The motivations and history behind it were discussed in https://mail.python.org/archives/list/python-dev@python.org/thread/7NZUCODEAPQFMRFXYRMGJXDSIS3WJYIV/ ## Test Plan I added an mdtest for this cornercase.		2024-10-19 11:09:54 -07:00
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resources	[red-knot] Fix edge case for binary-expression inference where the lhs and rhs are the exact same type (#13823)	2024-10-19 11:09:54 -07:00
src	[red-knot] Fix edge case for binary-expression inference where the lhs and rhs are the exact same type (#13823)	2024-10-19 11:09:54 -07:00
tests	[red-knot] document test framework (#13695)	2024-10-10 12:02:01 -07:00
build.rs	[red-knot] Add a build.rs file to red_knot_python_semantic, and document pitfalls of using rstest in combination with mdtest (#13747)	2024-10-14 13:02:03 +01:00
Cargo.toml	[red knot] Use memmem::find instead of custom version (#13750)	2024-10-14 15:17:19 +02:00