Dhruv Manilawala c7107a5a90 [ty] Use `zip` to perform explicit specialization (#21635) ... ## Summary This PR updates the explicit specialization logic to avoid using the call machinery. Previously, the logic would use the call machinery by converting the list of type variables into a `Binding` with a single `Signature` where all the type variables are positional-only parameters with bounds and constraints as the annotated type and the default type as the default parameter value. This has the advantage that it doesn't need to implement any specific logic but the disadvantages are subpar diagnostic messages as it would use the ones specific to a function call. But, an important disadvantage is that the kind of type variable is lost in this translation which becomes important in #21445 where a `ParamSpec` can specialize into a list of types which is provided using list literal. For example, ```py class Foo[T, **P]: ... Foo[int, [int, str]] ``` This PR converts the logic to use a simple loop using `zip_longest` as all type variables and their corresponding type argument maps on a 1-1 basis. They cannot be specified using keyword argument either e.g., `dict[_VT=str, _KT=int]` is invalid. This PR also makes an initial attempt to improve the diagnostic message to specifically target the specialization part by using words like "type argument" instead of just "argument" and including information like the type variable, bounds, and constraints. Further improvements can be made by highlighting the type variable definition or the bounds / constraints as a sub-diagnostic but I'm going to leave that as a follow-up. ## Test Plan Update messages in existing test cases.		2025-11-27 03:52:22 +00:00
..
annotations	[ty] Improve several "Did you mean?" suggestions (#21597)	2025-11-25 10:29:01 +00:00
assignment	[ty] Avoid expression reinference for diagnostics (#21267)	2025-11-25 09:24:00 -08:00
binary	[ty] support PEP 613 type aliases (#21394)	2025-11-20 17:59:35 -08:00
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] Avoid expression reinference for diagnostics (#21267)	2025-11-25 09:24:00 -08:00
class	[ty] Check method definitions on subclasses for Liskov violations (#21436)	2025-11-23 18:08:15 +00:00
comparison	[ty] Check method definitions on subclasses for Liskov violations (#21436)	2025-11-23 18:08:15 +00:00
comprehensions	[ty] fix global symbol lookup from eager scopes (#21317)	2025-11-12 10:15:51 -08:00
conditional	[ty] Support as-patterns in reachability analysis (#19728)	2025-08-04 20:13:50 +02:00
dataclasses	[ty] Dataclasses: `__hash__` semantics and `unsafe_hash` (#21470)	2025-11-16 09:52:30 +00:00
declaration	[ty] Format conflicting types as an enumeration (#18956)	2025-06-26 14:29:33 +02:00
diagnostics	[ty] support generic aliases in `type[...]`, like `type[C[int]]` (#21552)	2025-11-24 13:56:42 -08:00
directives	[ty] Custom concise diagnostic messages (#21498)	2025-11-18 09:35:40 +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] Improve diagnostics for invalid exceptions (#21475)	2025-11-15 22:12:00 +00:00
expression	[ty] Check method definitions on subclasses for Liskov violations (#21436)	2025-11-23 18:08:15 +00:00
function	[ty] Sync vendored typeshed stubs (#21466)	2025-11-15 17:12:32 +00:00
generics	[ty] Use `zip` to perform explicit specialization (#21635)	2025-11-27 03:52:22 +00:00
ide_support	[ty] Fixup a few details around version-specific dataclass features (#21453)	2025-11-14 15:04:55 +00:00
import	[ty] handle recursive type inference properly (#20566)	2025-11-26 08:50:26 -08:00
literal	[ty] Type inference for genererator expressions (#21437)	2025-11-14 13:04:11 +00:00
loops	[ty] Fix bug where ty would think all types had an `__mro__` attribute (#20995)	2025-10-27 11:19:12 +00:00
narrow	[ty] Eagerly evaluate `types.UnionType` elements as type expressions (#21531)	2025-11-20 17:28:48 +01:00
regression	[ty] handle recursive type inference properly (#20566)	2025-11-26 08:50:26 -08:00
scopes	[ty] Make `__getattr__` available for `ModuleType` instances (#21450)	2025-11-14 13:59:14 +01:00
shadowing	Rename Red Knot (#17820)	2025-05-03 19:49:15 +02:00
snapshots	[ty] Implement `typing.override` (#21627)	2025-11-25 10:42:40 -08:00
stubs	[ty] Better invalid-assignment diagnostics (#21476)	2025-11-18 14:31:04 +01:00
subscript	[ty] implement `TypedDict` structural assignment (#21467)	2025-11-20 13:15:28 -08:00
suppressions	[ty] Add 'remove unused ignore comment' code action (#21582)	2025-11-25 08:08:21 -05:00
type_compendium	[ty] Improve literal promotion heuristics (#21439)	2025-11-14 16:13:56 -05:00
type_of	[ty] support generic aliases in `type[...]`, like `type[C[int]]` (#21552)	2025-11-24 13:56:42 -08:00
type_properties	[ty] support generic aliases in `type[...]`, like `type[C[int]]` (#21552)	2025-11-24 13:56:42 -08:00
type_qualifiers	[ty] Fix false positive for Final attribute assignment in __init__ (#21158)	2025-11-11 12:54:05 -08:00
unary	Update class literal display to use `<class 'Foo'>` style (#17889)	2025-05-06 20:11:25 -04:00
with	[ty] Use `typing.Self` for the first parameter of instance methods (#20517)	2025-09-29 21:08:08 +02:00
.mdformat.toml	Rename Red Knot (#17820)	2025-05-03 19:49:15 +02:00
async.md	[ty] Support `async`/`await`, `async with` and `yield from` (#19595)	2025-07-30 11:51:21 +02:00
attributes.md	[ty] handle recursive type inference properly (#20566)	2025-11-26 08:50:26 -08:00
bidirectional.md	[ty] Avoid expression reinference for diagnostics (#21267)	2025-11-25 09:24:00 -08:00
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] handle recursive type inference properly (#20566)	2025-11-26 08:50:26 -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] Custom concise diagnostic messages (#21498)	2025-11-18 09:35:40 +01:00
exhaustiveness_checking.md	[ty] Improve exhaustiveness analysis for type variables with bounds or constraints (#21172)	2025-10-31 16:51:11 -04:00
final.md	Rename Red Knot (#17820)	2025-05-03 19:49:15 +02:00
implicit_type_aliases.md	[ty] Add type definitions for `Type::SpecialForm`s (#21544)	2025-11-20 18:14:30 +00:00
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] Implicit type aliases: Add support for `typing.Union` (#21363)	2025-11-12 12:59:14 +01:00
known_constants.md	Rename Red Knot (#17820)	2025-05-03 19:49:15 +02:00
liskov.md	[ty] Extend Liskov checks to also cover classmethods and staticmethods (#21598)	2025-11-24 23:14:06 +00:00
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	Rename Red Knot (#17820)	2025-05-03 19:49:15 +02:00
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] Sync vendored typeshed stubs (#21466)	2025-11-15 17:12:32 +00:00
named_tuple.md	[ty] Fix bug where ty would think all types had an `__mro__` attribute (#20995)	2025-10-27 11:19:12 +00:00
overloads.md	[ty] Infer type of `self` for decorated methods and properties (#21123)	2025-10-29 21:22:38 +00:00
override.md	[ty] Implement `typing.override` (#21627)	2025-11-25 10:42:40 -08:00
paramspec.md	[ty] Ensure annotation/type expressions in stub files are always deferred (#21401)	2025-11-13 17:14:54 +00:00
pep613_type_aliases.md	[ty] handle recursive type inference properly (#20566)	2025-11-26 08:50:26 -08:00
pep695_type_aliases.md	[ty] handle recursive type inference properly (#20566)	2025-11-26 08:50:26 -08:00
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	[ty] Substitute for `typing.Self` when checking protocol members (#21569)	2025-11-24 14:05:09 -05:00
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	Rename Red Knot (#17820)	2025-05-03 19:49:15 +02:00
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] Use "cannot" consistently over "can not" (#21255)	2025-11-03 10:38:20 -05:00
typed_dict.md	[ty] Improve several "Did you mean?" suggestions (#21597)	2025-11-25 10:29:01 +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] Use "cannot" consistently over "can not" (#21255)	2025-11-03 10:38:20 -05:00