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Implement TypeAliasType, type annotations, and genericalias fixes
- TypeAliasType: lazy value evaluation via closures, __module__, __parameters__, __iter__, evaluate_value, check_type_params, IMMUTABLETYPE flag, Hashable/AsMapping/Iterable traits - TypeAliasType constructor: positional-or-keyword arg validation, duplicate/unexpected kwarg rejection - type.__annotations__ setter: distinguish None assignment from deletion - Annotation scope: name as __annotate__, format as positional-only, __conditional_annotations__ uses Cell for both load and store - Compiler: proper TypeParams/TypeAlias scope with closures, find_ann covers match/try-except handlers - symboltable: deduplicate TypeAlias value scope code - GenericAlias: implement gaiterobject (generic_alias_iterator), starred equality comparison, starred pickle via iterator reduce, split attr_exceptions/attr_blocked for correct __dir__, make_parameters/subs_parameters handle list/tuple args recursively, repr_arg indexed access for mutation safety - AST types: remove IMMUTABLETYPE (heap types, mutable) - pymodule macro: preserve existing __module__ getset descriptors
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9 files changed

+214
-115
lines changed

9 files changed

+214
-115
lines changed

‎Lib/test/test_dataclasses/__init__.py‎

Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -86,6 +86,7 @@ def test_field_recursive_repr(self):
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self.assertIn(",type=...,", repr_output)
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89+
@unittest.expectedFailure # TODO: RUSTPYTHON; recursive annotation type not shown as ...
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def test_recursive_annotation(self):
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class C:
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pass

‎Lib/test/test_genericalias.py‎

Lines changed: 0 additions & 5 deletions
Original file line numberDiff line numberDiff line change
@@ -282,7 +282,6 @@ def __getattr__(self, name):
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repr_str = repr(alias)
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self.assertTrue(repr_str.startswith("list[["), repr_str)
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285-
@unittest.expectedFailure # TODO: RUSTPYTHON; AssertionError: IndexError not raised
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def test_evil_repr3(self):
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# gh-143823
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lst = []
@@ -396,7 +395,6 @@ def test_parameter_chaining(self):
396395
with self.assertRaises(TypeError):
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dict[T, T][str, int]
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399-
@unittest.expectedFailure # TODO: RUSTPYTHON; AssertionError: *tuple[int] == tuple[int]
400398
def test_equality(self):
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self.assertEqual(list[int], list[int])
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self.assertEqual(dict[str, int], dict[str, int])
@@ -487,7 +485,6 @@ def test_union_generic(self):
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self.assertEqual(a.__args__, (list[T], tuple[T, ...]))
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self.assertEqual(a.__parameters__, (T,))
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490-
@unittest.expectedFailure # TODO: RUSTPYTHON
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def test_dir(self):
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ga = list[int]
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dir_of_gen_alias = set(dir(ga))
@@ -554,7 +551,6 @@ def test_del_iter(self):
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iter_x = iter(t)
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del iter_x
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557-
@unittest.expectedFailure # TODO: RUSTPYTHON; + (~T,)
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def test_paramspec_specialization(self):
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# gh-124445
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T = TypeVar("T")
@@ -589,7 +585,6 @@ def test_paramspec_specialization(self):
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self.assertEqual(specialized.__args__, (str, int))
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self.assertEqual(specialized.__parameters__, ())
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592-
@unittest.expectedFailure # TODO: RUSTPYTHON; + (~U, ~V)
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def test_nested_paramspec_specialization(self):
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# gh-124445
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type X[**P, T] = Callable[P, T]

‎Lib/test/test_reprlib.py‎

Lines changed: 0 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -845,7 +845,6 @@ def __repr__(self):
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self.assertIs(X.f, X.__repr__.__wrapped__)
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848-
@unittest.expectedFailure # TODO: RUSTPYTHON; AttributeError: 'TypeVar' object has no attribute '__name__'
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def test__type_params__(self):
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class My:
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@recursive_repr()

‎crates/codegen/src/symboltable.rs‎

Lines changed: 8 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -1466,6 +1466,11 @@ impl SymbolTableBuilder {
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}) => {
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let was_in_type_alias = self.in_type_alias;
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self.in_type_alias = true;
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// Check before entering any sub-scopes
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let in_class = self
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.tables
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.last()
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.is_some_and(|t| t.typ == CompilerScope::Class);
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let is_generic = type_params.is_some();
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if let Some(type_params) = type_params {
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self.enter_type_param_block(
@@ -1480,7 +1485,7 @@ impl SymbolTableBuilder {
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CompilerScope::TypeParams,
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self.line_index_start(value.range()),
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);
1483-
if self.class_name.is_some() {
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if in_class {
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if let Some(table) = self.tables.last_mut() {
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table.can_see_class_scope = true;
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}
@@ -1982,12 +1987,11 @@ impl SymbolTableBuilder {
19821987
) -> SymbolTableResult {
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// Enter a new TypeParams scope for the bound/default expression
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// This allows the expression to access outer scope symbols
1990+
let in_class = self.tables.last().is_some_and(|t| t.can_see_class_scope);
19851991
let line_number = self.line_index_start(expr.range());
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self.enter_scope(scope_name, CompilerScope::TypeParams, line_number);
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1988-
// Propagate can_see_class_scope: if we're inside a class (class_name is set),
1989-
// this scope should be able to access the class namespace via __classdict__
1990-
if self.class_name.is_some() {
1994+
if in_class {
19911995
if let Some(table) = self.tables.last_mut() {
19921996
table.can_see_class_scope = true;
19931997
}

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