Carl Meyer 13bdba5d28 [ty] support recursive type aliases (#19805) ... ## Summary Support recursive type aliases by adding a `Type::TypeAlias` type variant, which allows referring to a type alias directly as a type without eagerly unpacking it to its value. We still unpack type aliases when they are added to intersections and unions, so that we can simplify the intersection/union appropriately based on the unpacked value of the type alias. This introduces new possible recursive types, and so also requires expanding our usage of recursion-detecting visitors in Type methods. The use of these visitors is still not fully comprehensive in this PR, and will require further expansion to support recursion in more kinds of types (I already have further work on this locally), but I think it may be better to do this incrementally in multiple PRs. ## Test Plan Added some recursive type-alias tests and made them pass.		2025-08-12 09:03:10 -07:00
..
annotations	[ty] typing.Self is bound by the method, not the class (#19784)	2025-08-06 17:26:17 -04:00
assignment	[ty] Return Option<TupleType> from infer_tuple_type_expression (#19735)	2025-08-04 13:48:19 +01:00
binary	[ty] Remove special casing for string-literal-in-tuple __contains__ (#19642)	2025-07-31 11:28:03 +01:00
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
call	[ty] Remove Type::Tuple (#19669)	2025-08-11 22:03:32 +01:00
class
comparison	[ty] Enum literal types (#19328)	2025-07-15 21:31:53 +02:00
comprehensions	[ty] Async for loops and async iterables (#19634)	2025-07-30 17:40:24 +02:00
conditional	[ty] Support as-patterns in reachability analysis (#19728)	2025-08-04 20:13:50 +02:00
dataclasses	[ty] Add basic support for dataclasses.field (#19553)	2025-07-25 14:56:04 +02:00
declaration	[ty] Format conflicting types as an enumeration (#18956)	2025-06-26 14:29:33 +02:00
diagnostics	[ty] Async for loops and async iterables (#19634)	2025-07-30 17:40:24 +02:00
directives	[ty] Exhaustiveness checking & reachability for match statements (#19508)	2025-07-23 22:45:45 +02:00
doc	ty_python_semantic: add union type context to function call type errors	2025-05-09 13:40:51 -04:00
exception	[ty] Use separate Rust types for bound and unbound type variables (#19796)	2025-08-11 15:29:58 -04:00
expression	[ty] Support async/await, async with and yield from (#19595)	2025-07-30 11:51:21 +02:00
function	[ty] Short circuit ReachabilityConstraints::analyze_single for dynamic types (#19867)	2025-08-11 21:58:34 +02:00
generics	[ty] Remove Type::Tuple (#19669)	2025-08-11 22:03:32 +01:00
ide_support	[ty] Fix attribute access on TypedDicts (#19758)	2025-08-05 13:59:10 +02:00
import	[ty] Implement module-level __getattr__ support (#19791)	2025-08-08 10:39:37 -07:00
literal	[ty] Understand classes that inherit from subscripted Protocol[] as generic (#17832)	2025-05-09 17:39:15 +01:00
loops	[ty] Async for loops and async iterables (#19634)	2025-07-30 17:40:24 +02:00
narrow	[ty] more cases for the class body global fallback	2025-08-07 17:30:27 -07:00
regression
scopes	[ty] Remove Type::Tuple (#19669)	2025-08-11 22:03:32 +01:00
shadowing
snapshots	[ty] Validate writes to TypedDict keys (#19782)	2025-08-06 15:19:13 -07:00
stubs	[ty] Do not carry the generic context of Protocol or Generic in the ClassBase enum (#17989)	2025-05-22 21:37:03 -04:00
subscript	[ty] Remove Type::Tuple (#19669)	2025-08-11 22:03:32 +01:00
suppressions	[ty] Consistent use of American english (in rules) (#19488)	2025-07-22 16:10:38 +02:00
type_compendium	[ty] Remove Type::Tuple (#19669)	2025-08-11 22:03:32 +01:00
type_of	[ty] Improve the Display for generic type[] types (#19667)	2025-07-31 19:45:01 +01:00
type_properties	[ty] Remove Type::Tuple (#19669)	2025-08-11 22:03:32 +01:00
type_qualifiers	[ty] Keep track of type qualifiers in stub declarations without right-hand side (#19756)	2025-08-05 12:07:05 +02:00
unary
with	[ty] Diagnostics for async context managers (#19704)	2025-08-05 07:41:37 -07:00
.mdformat.toml
async.md	[ty] Support async/await, async with and yield from (#19595)	2025-07-30 11:51:21 +02:00
attributes.md	[ty] Infer type[tuple[int, str]] as the meta-type of tuple[int, str] (#19741)	2025-08-04 13:10:47 +00:00
cycle.md	[ty] Add cycle handling for unpacking targets (#18078)	2025-05-13 21:27:48 +00:00
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] Support __setitem__ and improve __getitem__ related diagnostics (#19578)	2025-08-01 09:23:27 +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] Fix descriptor lookups for most types that overlap with None (#19120)	2025-07-05 19:34:23 +01:00
enums.md	[ty] Exhaustiveness checking & reachability for match statements (#19508)	2025-07-23 22:45:45 +02:00
exhaustiveness_checking.md	[ty] Support as-patterns in reachability analysis (#19728)	2025-08-04 20:13:50 +02:00
final.md
instance_layout_conflict.md	[ty] Remove special casing for tuple addition (#19636)	2025-07-30 16:25:42 +00:00
intersection_types.md	[ty] Expansion of enums into unions of literals (#19382)	2025-07-21 19:37:55 +02:00
invalid_syntax.md
known_constants.md
mdtest_config.md
mdtest_custom_typeshed.md	[ty] Remove Type::Tuple (#19669)	2025-08-11 22:03:32 +01:00
metaclass.md
mro.md	[ty] Track different uses of legacy typevars, including context when rendering typevars (#19604)	2025-08-01 12:20:32 -04:00
named_tuple.md	[ty] typing.Self is bound by the method, not the class (#19784)	2025-08-06 17:26:17 -04:00
overloads.md	[ty] Track different uses of legacy typevars, including context when rendering typevars (#19604)	2025-08-01 12:20:32 -04:00
pep695_type_aliases.md	[ty] support recursive type aliases (#19805)	2025-08-12 09:03:10 -07:00
properties.md	ty_python_semantic: add union type context to function call type errors	2025-05-09 13:40:51 -04:00
protocols.md	[ty] Track different uses of legacy typevars, including context when rendering typevars (#19604)	2025-08-01 12:20:32 -04:00
public_types.md	[ty] improve lazy scope place lookup (#19321)	2025-07-25 07:11:11 +00:00
statically_known_branches.md	[ty] Infer nonlocal types as unions of all reachable bindings (#18750)	2025-06-26 12:24:40 +02:00
sys_platform.md
sys_version_info.md
terminal_statements.md	[ty] improve lazy scope place lookup (#19321)	2025-07-25 07:11:11 +00:00
ty_extensions.md	[ty] Rename type_api => ty_extensions (#19523)	2025-07-24 08:24:26 +00:00
typed_dict.md	[ty] Validate writes to TypedDict keys (#19782)	2025-08-06 15:19:13 -07:00
union_types.md	[ty] Expansion of enums into unions of literals (#19382)	2025-07-21 19:37:55 +02:00
unpacking.md	[ty] Remove Type::Tuple (#19669)	2025-08-11 22:03:32 +01:00
unreachable.md	[ty] improve lazy scope place lookup (#19321)	2025-07-25 07:11:11 +00:00