Carl Meyer 0138cd238a [ty] avoid fixpoint unioning of types containing current-cycle Divergent (#21910) ... Partially addresses https://github.com/astral-sh/ty/issues/1732 ## Summary Don't union the previous type in fixpoint iteration if the previous type contains a `Divergent` from the current cycle and the latest type does not. The theory here, as outlined by @mtshiba at https://github.com/astral-sh/ty/issues/1732#issuecomment-3609937420, is that oscillation can't occur by removing and then reintroducing a `Divergent` type repeatedly, since `Divergent` types are only introduced at the start of fixpoint iteration. ## Test Plan Removes a `Divergent` type from the added mdtest, doesn't otherwise regress any tests.		2025-12-11 19:52:34 -08:00
..
annotations	[ty] support NewTypes of float and complex (#21886)	2025-12-12 00:43:09 +00:00
assignment	[ty] Uniformly use "not supported" in diagnostics (#21916)	2025-12-11 15:03:55 +00:00
binary	[ty] Uniformly use "not supported" in diagnostics (#21916)	2025-12-11 15:03:55 +00:00
boolean	Revert "[ty] Better control flow for boolean expressions that are inside if (#18010)" (#18150)	2025-05-17 08:27:32 -04:00
boundness_declaredness	[ty] Reformulation of public symbol inference test suite (#20667)	2025-10-01 14:26:17 +02:00
call	[ty] Support implicit type of cls in signatures (#21771)	2025-12-10 16:56:20 -05:00
class	[ty] Infer type of implicit cls parameter in method bodies (#21685)	2025-12-10 10:31:28 +01:00
comparison	[ty] Improve diagnostics for unsupported comparison operations (#21737)	2025-12-02 19:58:45 +00:00
comprehensions	[ty] fix global symbol lookup from eager scopes (#21317)	2025-11-12 10:15:51 -08:00
conditional	[ty] Uniformly use "not supported" in diagnostics (#21916)	2025-12-11 15:03:55 +00:00
dataclasses	[ty] Respect kw_only from parent class (#21820)	2025-12-10 10:12:18 +01:00
declaration	[ty] Format conflicting types as an enumeration (#18956)	2025-06-26 14:29:33 +02:00
diagnostics	[ty] Add subdiagnostic hint if the user wrote X = Any rather than X: Any (#21777)	2025-12-03 20:42:21 +00:00
directives	[ty] Minor improvements to assert_type diagnostics (#21811)	2025-12-05 12:33:30 +00:00
doc	ty_python_semantic: add union type context to function call type errors	2025-05-09 13:40:51 -04:00
exception	[ty] Improve diagnostics for invalid exceptions (#21475)	2025-11-15 22:12:00 +00:00
expression	[ty] Uniformly use "not supported" in diagnostics (#21916)	2025-12-11 15:03:55 +00:00
external	[ty] Type inference for @asynccontextmanager (#21876)	2025-12-09 22:49:00 +01:00
function	[ty] Improve the display of various special-form types (#21775)	2025-12-03 21:19:59 +00:00
generics	[ty] improve bad specialization results & error messages (#21840)	2025-12-11 19:21:34 -08:00
ide_support	[ty] Support type[T] with type variables (#21650)	2025-11-28 09:20:24 +01:00
import	[ty] cleanup test path (#21781)	2025-12-03 21:54:50 +00:00
libraries	[ty] Generic types aliases (implicit and PEP 613) (#21553)	2025-11-28 20:38:24 +01:00
literal	[ty] Type inference for genererator expressions (#21437)	2025-11-14 13:04:11 +00:00
loops	[ty] Uniformly use "not supported" in diagnostics (#21916)	2025-12-11 15:03:55 +00:00
narrow	[ty] Uniformly use "not supported" in diagnostics (#21916)	2025-12-11 15:03:55 +00:00
regression	[ty] Avoid diagnostic when typing_extensions.ParamSpec uses default parameter (#21839)	2025-12-08 12:34:30 +00:00
scopes	[ty] Make __getattr__ available for ModuleType instances (#21450)	2025-11-14 13:59:14 +01:00
shadowing
snapshots	[ty] Uniformly use "not supported" in diagnostics (#21916)	2025-12-11 15:03:55 +00:00
stubs	[ty] Better invalid-assignment diagnostics (#21476)	2025-11-18 14:31:04 +01:00
subscript	[ty] support type[tuple[...]] (#21652)	2025-12-01 11:49:26 +01:00
suppressions	[ty] Add code action to ignore diagnostic on the current line (#21595)	2025-11-29 15:41:54 +01:00
type_compendium	[ty] Improve literal promotion heuristics (#21439)	2025-11-14 16:13:56 -05:00
type_of	[ty] Fix disjointness checks with type-of @final classes (#21770)	2025-12-10 15:15:10 -05:00
type_properties	[ty] Fix disjointness checks with type-of @final classes (#21770)	2025-12-10 15:15:10 -05:00
type_qualifiers	[ty] Avoid double-analyzing tuple in Final subscript (#21828)	2025-12-07 14:27:14 +00:00
unary	[ty] Uniformly use "not supported" in diagnostics (#21916)	2025-12-11 15:03:55 +00:00
with	[ty] Type inference for @asynccontextmanager (#21876)	2025-12-09 22:49:00 +01:00
.mdformat.toml
async.md	[ty] Generic types aliases (implicit and PEP 613) (#21553)	2025-11-28 20:38:24 +01:00
attributes.md	[ty] Support type[T] with type variables (#21650)	2025-11-28 09:20:24 +01:00
bidirectional.md	[ty] Improve diagnostics for unsupported comparison operations (#21737)	2025-12-02 19:58:45 +00:00
classes.md	[ty] Fix bug where ty would think all types had an __mro__ attribute (#20995)	2025-10-27 11:19:12 +00:00
cycle.md	[ty] avoid fixpoint unioning of types containing current-cycle Divergent (#21910)	2025-12-11 19:52:34 -08:00
decorators.md	ty_python_semantic: add union type context to function call type errors	2025-05-09 13:40:51 -04:00
del.md	[ty] No union with Unknown for module-global symbols (#20664)	2025-10-01 16:40:30 +02:00
deprecated.md	[ty] Consistent use of American english (in rules) (#19488)	2025-07-22 16:10:38 +02:00
descriptor_protocol.md	[ty] Use the return type of __get__ for descriptor lookups even when __get__ is called with incorrect arguments (#21424)	2025-11-13 12:05:10 +00:00
enums.md	[ty] Support type[T] with type variables (#21650)	2025-11-28 09:20:24 +01:00
exhaustiveness_checking.md	[ty] Exhaustiveness checking for generic classes (#21726)	2025-12-01 13:52:36 +01:00
final.md	[ty] Improve @override, @final and Liskov checks in cases where there are multiple reachable definitions (#21767)	2025-12-03 12:51:36 +00:00
implicit_type_aliases.md	[ty] improve bad specialization results & error messages (#21840)	2025-12-11 19:21:34 -08:00
instance_layout_conflict.md	[ty] initial support for slots=True in dataclasses (#20278)	2025-09-07 18:25:35 +01:00
intersection_types.md	[ty] Use "cannot" consistently over "can not" (#21255)	2025-11-03 10:38:20 -05:00
invalid_syntax.md	[ty] Avoid double-inference on non-tuple argument to Annotated (#21837)	2025-12-08 10:24:05 -05:00
known_constants.md
liskov.md	[ty] Carry generic context through when converting class into Callable (#21798)	2025-12-05 08:57:21 -05:00
literal_promotion.md	[ty] Narrow type context during literal promotion in generic class constructors (#21574)	2025-11-21 17:05:32 -05:00
mdtest_config.md
mdtest_custom_typeshed.md	[ty] Remove Type::Tuple (#19669)	2025-08-11 22:03:32 +01:00
metaclass.md	Update class literal display to use <class 'Foo'> style (#17889)	2025-05-06 20:11:25 -04:00
mro.md	[ty] Improve the display of various special-form types (#21775)	2025-12-03 21:19:59 +00:00
named_tuple.md	[ty] Support implicit type of cls in signatures (#21771)	2025-12-10 16:56:20 -05:00
overloads.md	[ty] Infer type of self for decorated methods and properties (#21123)	2025-10-29 21:22:38 +00:00
override.md	[ty] Improve @override, @final and Liskov checks in cases where there are multiple reachable definitions (#21767)	2025-12-03 12:51:36 +00:00
pep613_type_aliases.md	[ty] Improve the display of various special-form types (#21775)	2025-12-03 21:19:59 +00:00
pep695_type_aliases.md	[ty] Support typevar-specialized dynamic types in generic type aliases (#21730)	2025-12-03 10:00:02 +01:00
properties.md	[ty] Use the return type of __get__ for descriptor lookups even when __get__ is called with incorrect arguments (#21424)	2025-11-13 12:05:10 +00:00
protocols.md	Fix stack overflow with recursive generic protocols (depth limit) (#21858)	2025-12-09 09:05:18 -08:00
public_types.md	[ty] Disambiguate classes that live in different modules but have the same fully qualified names (#20756)	2025-10-08 18:27:40 +01:00
statically_known_branches.md	[ty] Rename "possibly unbound" diagnostics to "possibly missing" (#20492)	2025-09-23 14:26:55 +00:00
sys_platform.md
sys_version_info.md	[ty] support PEP 613 type aliases (#21394)	2025-11-20 17:59:35 -08:00
t_strings.md	[ty] Add support for PEP 750 t-strings (#20085)	2025-08-25 18:49:49 +00:00
terminal_statements.md	[ty] improve lazy scope place lookup (#19321)	2025-07-25 07:11:11 +00:00
ty_extensions.md	[ty] Uniformly use "not supported" in diagnostics (#21916)	2025-12-11 15:03:55 +00:00
typed_dict.md	[ty] add SyntheticTypedDictType and implement normalized and is_equivalent_to (#21784)	2025-12-10 20:36:36 +00:00
union_types.md	[ty] Introduce TypeRelation::Redundancy (#20602)	2025-10-03 18:35:30 +01:00
unpacking.md	[ty] Infer more precise types for collection literals (#20360)	2025-09-17 18:51:50 -04:00
unreachable.md	[ty] Add subdiagnostic hint if a variable with type Never is used in a type expression (#21660)	2025-11-27 12:48:18 +00:00