Carl Meyer 17dc2e4d80 [ty] don't assume that deferred type inference means deferred name resolution (#20160) ... ## Summary We have the ability to defer type inference of some parts of definitions, so as to allow us to create a type that may need to be recursively referenced in those other parts of the definition. We also have the ability to do type inference in a context where all name resolution should be deferred (that is, names should be looked up from all-reachable-definitions rather than from the location of use.) This is used for all annotations in stubs, or if `from __future__ import annotations` is active. Previous to this PR, these two concepts were linked: deferred-inference always implied deferred-name-resolution, though we also supported deferred-name-resolution without deferred-inference, via `DeferredExpressionState`. For the upcoming `typing.TypeAlias` support, I will defer inference of the entire RHS of the alias (so as to support cycles), but that doesn't imply deferred name resolution; at runtime, the RHS of a name annotated as `typing.TypeAlias` is executed eagerly. So this PR fully de-couples the two concepts, instead explicitly setting the `DeferredExpressionState` in those cases where we should defer name resolution. It also fixes a long-standing related bug, where we were deferring name resolution of all names in class bases, if any of the class bases contained a stringified annotation. ## Test Plan Added test that failed before this PR.		2025-08-29 16:19:45 -07:00
..
annotations	[ty] Preserve qualifiers when accessing attributes on unions/intersections (#20114)	2025-08-27 20:01:45 +02:00
assignment	[ty] Infer slightly more precise types for comprehensions (#20111)	2025-08-27 13:21:47 +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	Update class literal display to use <class 'Foo'> style (#17889)	2025-05-06 20:11:25 -04:00
call	[ty] Unpack variadic argument type in specialization (#20130)	2025-08-29 04:27:28 +00:00
class	[ty] Remove use of ClassBase::try_from_type from super() machinery (#19902)	2025-08-14 22:14:31 +01:00
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] correctly ignore field specifiers when not specified (#20002)	2025-08-20 11:33:23 -07:00
declaration	[ty] Format conflicting types as an enumeration (#18956)	2025-06-26 14:29:33 +02:00
diagnostics	Revert "[ty] Use invalid-assignment error code for invalid assignments to ClassVars" (#20158)	2025-08-29 19:48:45 +01:00
directives	[ty] Infer slightly more precise types for comprehensions (#20111)	2025-08-27 13:21:47 +01:00
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] Improve disambiguation of types via fully qualified names (#20141)	2025-08-29 08:44:18 +00:00
generics	[ty] Perform assignability etc checks using new Constraints trait (#19838)	2025-08-21 09:30:09 -04:00
ide_support	[ty] Fix attribute access on TypedDicts (#19758)	2025-08-05 13:59:10 +02:00
import	[ty] Infer slightly more precise types for comprehensions (#20111)	2025-08-27 13:21:47 +01:00
literal	[ty] Infer slightly more precise types for comprehensions (#20111)	2025-08-27 13:21:47 +01:00
loops	[ty] Add precise iteration and unpacking inference for string literals and bytes literals (#20023)	2025-08-22 19:33:08 +01:00
narrow	[ty] Infer slightly more precise types for comprehensions (#20111)	2025-08-27 13:21:47 +01:00
regression
scopes	[ty] fix deferred name loading in PEP695 generic classes/functions (#19888)	2025-08-13 15:51:59 -07:00
shadowing
snapshots	Revert "[ty] Use invalid-assignment error code for invalid assignments to ClassVars" (#20158)	2025-08-29 19:48:45 +01:00
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] Infer slightly more precise types for comprehensions (#20111)	2025-08-27 13:21:47 +01:00
suppressions	[ty] Consistent use of American english (in rules) (#19488)	2025-07-22 16:10:38 +02:00
type_compendium	[ty] Infer slightly more precise types for comprehensions (#20111)	2025-08-27 13:21:47 +01:00
type_of	[ty] Improve the Display for generic type[] types (#19667)	2025-07-31 19:45:01 +01:00
type_properties	[ty] Introduce a representation for the top/bottom materialization of an invariant generic (#20076)	2025-08-27 17:53:57 -07:00
type_qualifiers	Revert "[ty] Use invalid-assignment error code for invalid assignments to ClassVars" (#20158)	2025-08-29 19:48:45 +01:00
unary	Update class literal display to use <class 'Foo'> style (#17889)	2025-05-06 20:11:25 -04:00
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	Revert "[ty] Use invalid-assignment error code for invalid assignments to ClassVars" (#20158)	2025-08-29 19:48:45 +01:00
classes.md	[ty] don't assume that deferred type inference means deferred name resolution (#20160)	2025-08-29 16:19:45 -07:00
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] Infer slightly more precise types for comprehensions (#20111)	2025-08-27 13:21:47 +01:00
deprecated.md	[ty] Consistent use of American english (in rules) (#19488)	2025-07-22 16:10:38 +02:00
descriptor_protocol.md	[ty] Better error message for attempting to assign to a read-only property (#20150)	2025-08-29 13:22:23 +00:00
enums.md	[ty] Infer the correct type of Enum __eq__ and __ne__ comparisions (#19666)	2025-08-18 19:45:44 +02:00
exhaustiveness_checking.md	[ty] Add precise iteration and unpacking inference for string literals and bytes literals (#20023)	2025-08-22 19:33:08 +01:00
final.md
instance_layout_conflict.md	[ty] Add support for PEP 800 (#20084)	2025-08-25 19:39:05 +01:00
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	Update class literal display to use <class 'Foo'> style (#17889)	2025-05-06 20:11:25 -04:00
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] Better error message for attempting to assign to a read-only property (#20150)	2025-08-29 13:22:23 +00:00
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] ensure union normalization really normalizes (#20147)	2025-08-29 09:02:35 -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	Revert "[ty] Use invalid-assignment error code for invalid assignments to ClassVars" (#20158)	2025-08-29 19:48:45 +01:00
public_types.md	[ty] improve lazy scope place lookup (#19321)	2025-07-25 07:11:11 +00:00
statically_known_branches.md	[ty] Evaluate reachability of non-definitely-bound to Ambiguous (#19579)	2025-08-28 14:34:49 +02:00
sys_platform.md
sys_version_info.md
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] Rename type_api => ty_extensions (#19523)	2025-07-24 08:24:26 +00:00
typed_dict.md	[ty] typecheck dict methods for TypedDict (#19874)	2025-08-29 16:25:03 +02:00
union_types.md	[ty] Expansion of enums into unions of literals (#19382)	2025-07-21 19:37:55 +02:00
unpacking.md	[ty] Infer slightly more precise types for comprehensions (#20111)	2025-08-27 13:21:47 +01:00
unreachable.md	[ty] improve lazy scope place lookup (#19321)	2025-07-25 07:11:11 +00:00