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Shunsuke Shibayama ef564094a9
[ty] support del statement and deletion of except handler names (#18593) 
## Summary

This PR closes https://github.com/astral-sh/ty/issues/238.

Since `DefinitionState::Deleted` was introduced in #18041, support for
the `del` statement (and deletion of except handler names) is
straightforward.

However, it is difficult to determine whether references to attributes
or subscripts are unresolved after they are deleted. This PR only
invalidates narrowing by assignment if the attribute or subscript is
deleted.

## Test Plan

`mdtest/del.md` is added.

---------

Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>
 		2025-06-12 07:44:42 -07:00
..
annotations [ty] Pull types on synthesized Python files created by mdtest (#18539) 2025-06-12 10:32:17 +01:00
assignment [ty] Add hint that PEP 604 union syntax is only available in 3.10+ (#18192) 2025-05-19 19:47:31 +02:00
binary [ty] Minor tweaks to "list all members" docs and tests (#18388) 2025-05-30 13:36:57 -04:00
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] Argument type expansion for overload call evaluation (#18382) 2025-06-04 02:12:00 +00:00
class Update class literal display to use `<class 'Foo'>` style (#17889) 2025-05-06 20:11:25 -04:00
comparison [ty] Fix binary intersection comparison inference logic (#18266) 2025-05-23 12:55:17 +02:00
comprehensions Rename Red Knot (#17820) 2025-05-03 19:49:15 +02:00
conditional Rename Red Knot (#17820) 2025-05-03 19:49:15 +02:00
declaration Rename Red Knot (#17820) 2025-05-03 19:49:15 +02:00
diagnostics [ty] Don't warn `yield` not in function when `yield` is in function (#18008) 2025-05-21 18:16:25 +02:00
directives [ty] Fix normalization of unions containing instances parameterized with unions (#18112) 2025-05-14 22:48:33 -04:00
doc ty_python_semantic: add union type context to function call type errors 2025-05-09 13:40:51 -04:00
exception [ty] support del statement and deletion of except handler names (#18593) 2025-06-12 07:44:42 -07:00
expression [ty] Treat lambda functions as instances of types.FunctionType (#18431) 2025-06-02 16:46:26 +01:00
function [ty] Add diagnosis for function with no return statement but with return type annotation (#18359) 2025-05-29 23:17:18 +00:00
generics [ty] Add meta-type tests for legavy TypeVars (#18453) 2025-06-04 07:44:44 +00:00
ide_support [ty] Minor tweaks to "list all members" docs and tests (#18388) 2025-05-30 13:36:57 -04:00
import [ty] Improve diagnostics if the user attempts to import a stdlib module that does not exist on their configured Python version (#18403) 2025-06-02 10:52:26 +00:00
literal [ty] Understand classes that inherit from subscripted `Protocol[]` as generic (#17832) 2025-05-09 17:39:15 +01:00
loops Rename Red Knot (#17820) 2025-05-03 19:49:15 +02:00
narrow [ty] type narrowing by attribute/subscript assignments (#18041) 2025-06-04 17:24:27 -07:00
regression Rename Red Knot (#17820) 2025-05-03 19:49:15 +02:00
scopes [ty] Add support for global __debug__ constant (#18540) 2025-06-10 06:48:59 +00:00
shadowing Rename Red Knot (#17820) 2025-05-03 19:49:15 +02:00
snapshots [ty] Add hints to `invalid-type-form` for common mistakes (#18543) 2025-06-09 00:40:05 +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] Do not carry the generic context of `Protocol` or `Generic` in the `ClassBase` enum (#17989) 2025-05-22 21:37:03 -04:00
suppressions Rename Red Knot (#17820) 2025-05-03 19:49:15 +02:00
type_compendium [ty] Type compendium (#18263) 2025-05-23 11:41:31 +02:00
type_of Update class literal display to use `<class 'Foo'>` style (#17889) 2025-05-06 20:11:25 -04:00
type_properties [ty] Generate the top and bottom materialization of a type (#18594) 2025-06-12 12:06:16 +05:30
type_qualifiers [ty] Pull types on synthesized Python files created by mdtest (#18539) 2025-06-12 10:32:17 +01:00
unary Update class literal display to use `<class 'Foo'>` style (#17889) 2025-05-06 20:11:25 -04:00
with [ty] Add hint if async context manager is used in non-async with statement (#18299) 2025-05-26 21:34:47 +02:00
.mdformat.toml Rename Red Knot (#17820) 2025-05-03 19:49:15 +02:00
attributes.md [ty] type narrowing by attribute/subscript assignments (#18041) 2025-06-04 17:24:27 -07:00
cycle.md [ty] Add cycle handling for unpacking targets (#18078) 2025-05-13 21:27:48 +00:00
dataclass_transform.md [ty] Detect overloads decorated with `@dataclass_transform` (#17835) 2025-05-07 15:51:13 +02:00
dataclasses.md [ty] dataclasses: Allow using dataclasses.dataclass as a function. (#18440) 2025-06-03 09:50:29 -07:00
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 del statement and deletion of except handler names (#18593) 2025-06-12 07:44:42 -07:00
descriptor_protocol.md [ty] type narrowing by attribute/subscript assignments (#18041) 2025-06-04 17:24:27 -07:00
final.md Rename Red Knot (#17820) 2025-05-03 19:49:15 +02:00
intersection_types.md [ty] Unify `Type::is_subtype_of()` and `Type::is_assignable_to()` (#18430) 2025-06-06 17:28:55 +00:00
invalid_syntax.md Rename Red Knot (#17820) 2025-05-03 19:49:15 +02:00
known_constants.md Rename Red Knot (#17820) 2025-05-03 19:49:15 +02:00
mdtest_config.md Rename Red Knot (#17820) 2025-05-03 19:49:15 +02:00
mdtest_custom_typeshed.md [ty] Fix duplicate diagnostics for unresolved module when an `import from` statement imports multiple members (#17886) 2025-05-06 12:37:10 +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] Implement implicit inheritance from `Generic[]` for PEP-695 generic classes (#18283) 2025-05-26 20:40:16 +01:00
named_tuple.md [ty] Add generic inference for dataclasses (#18443) 2025-06-03 09:59:43 -07:00
overloads.md Rename Red Knot (#17820) 2025-05-03 19:49:15 +02:00
pep695_type_aliases.md [ty] Support `typing.TypeAliasType` (#18156) 2025-05-19 16:36:49 +02:00
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] Unify `Type::is_subtype_of()` and `Type::is_assignable_to()` (#18430) 2025-06-06 17:28:55 +00:00
slots.md Rename Red Knot (#17820) 2025-05-03 19:49:15 +02:00
statically_known_branches.md Fix typos (#17988) 2025-05-09 14:57:14 -04:00
sys_platform.md Rename Red Knot (#17820) 2025-05-03 19:49:15 +02:00
sys_version_info.md Rename Red Knot (#17820) 2025-05-03 19:49:15 +02:00
terminal_statements.md Rename Red Knot (#17820) 2025-05-03 19:49:15 +02:00
type_api.md [ty] Pull types on synthesized Python files created by mdtest (#18539) 2025-06-12 10:32:17 +01:00
typed_dict.md Rename Red Knot (#17820) 2025-05-03 19:49:15 +02:00
union_types.md Rename Red Knot (#17820) 2025-05-03 19:49:15 +02:00
unpacking.md [ty] Add tests for empty list/tuple unpacking (#18451) 2025-06-04 02:40:26 +00:00
unreachable.md Rename Red Knot (#17820) 2025-05-03 19:49:15 +02:00