* Make mappingproxy's nb_or slot symmetric for dict | mp
CPython's mappingproxy_or (Objects/descrobject.c) unwraps a mappingproxy
on either side of '|' to its underlying mapping and delegates back to
PyNumber_Or. This makes 'dict | mp', 'mp | dict', and 'mp | mp' all
produce a plain dict result without dict's own nb_or having to know
about mappingproxy.
RustPython's 'or' slot in 'AsNumber for PyMappingProxy' only handled
the case where the left operand is a mappingproxy. When the slot fired
with a=dict, b=mp (because dict.nb_or returned NotImplemented), it
returned NotImplemented again — so 'dict | mp' raised TypeError. This
propagated to 'UserDict | mappingproxy' (which calls self.data | other).
Rewrite the slot to unwrap a mappingproxy on either side (or both)
before delegating to vm._or on the underlying mappings. The
inplace_or slot is unchanged — '|=' is still rejected.
Unmasks test_userdict.UserDictTest.test_mixed_or.
* Unmask test_types.MappingProxyTests.test_union
The slot fix in this PR also enables this test, which was marked
expectedFailure for the same dict|mappingproxy TypeError. Caught as
UNEXPECTED SUCCESS in CI.
This directory contains all of the Python files that make up the standard
library for RustPython.
Most of these files are copied over from the CPython repository (the 3.7
branch), with slight modifications to allow them to work under RustPython. The
current goal is to complete the standard library with as few modifications as
possible. Current modifications are just temporary workarounds for bugs/missing
feature within the RustPython implementation.
The first big module we are targeting is unittest, so we can leverage the
CPython test suite.
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