Douglas Creager 14fe1228e7 [ty] Perform assignability etc checks using new Constraints trait (#19838) ... "Why would you do this? This looks like you just replaced `bool` with an overly complex trait" Yes that's correct! This should be a no-op refactoring. It replaces all of the logic in our assignability, subtyping, equivalence, and disjointness methods to work over an arbitrary `Constraints` trait instead of only working on `bool`. The methods that `Constraints` provides looks very much like what we get from `bool`. But soon we will add a new impl of this trait, and some new methods, that let us express "fuzzy" constraints that aren't always true or false. (In particular, a constraint will express the upper and lower bounds of the allowed specializations of a typevar.) Even once we have that, most of the operations that we perform on constraint sets will be the usual boolean operations, just on sets. (`false` becomes empty/never; `true` becomes universe/always; `or` becomes union; `and` becomes intersection; `not` becomes negation.) So it's helpful to have this separate PR to refactor how we invoke those operations without introducing the new functionality yet. Note that we also have translations of `Option::is_some_and` and `is_none_or`, and of `Iterator::any` and `all`, and that the `and`, `or`, `when_any`, and `when_all` methods are meant to short-circuit, just like the corresponding boolean operations. For constraint sets, that depends on being able to implement the `is_always` and `is_never` trait methods. --------- Co-authored-by: Carl Meyer <carl@astral.sh> Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>		2025-08-21 09:30:09 -04:00
..
annotations	[ty] Track when type variables are inferable or not (#19786)	2025-08-16 18:25:03 -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	Update class literal display to use <class 'Foo'> style (#17889)	2025-05-06 20:11:25 -04:00
call	[ty] Avoid unnecessary argument type expansion (#19999)	2025-08-21 06:13:11 +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	[ty] Add diagnostics for invalid await expressions (#19711)	2025-08-14 14:38:33 -07:00
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] 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] Add link for namespaces being partial (#20015)	2025-08-20 21:28:57 -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] linear variance inference for PEP-695 type parameters (#18713)	2025-08-19 17:54:09 -07:00
regression	Rename Red Knot (#17820)	2025-05-03 19:49:15 +02:00
scopes	[ty] fix deferred name loading in PEP695 generic classes/functions (#19888)	2025-08-13 15:51:59 -07:00
shadowing	Rename Red Knot (#17820)	2025-05-03 19:49:15 +02:00
snapshots	[ty] Strict validation of protocol members (#17750)	2025-08-19 22:45:41 +00:00
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] Improve sys.version_info special casing (#19894)	2025-08-13 14:39:13 +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	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	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] 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] Infer the correct type of Enum __eq__ and __ne__ comparisions (#19666)	2025-08-18 19:45:44 +02:00
exhaustiveness_checking.md	[ty] Support as-patterns in reachability analysis (#19728)	2025-08-04 20:13:50 +02:00
final.md	Rename Red Knot (#17820)	2025-05-03 19:49:15 +02:00
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	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] 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] Detect NamedTuple classes where fields without default values follow fields with default values (#19945)	2025-08-19 08:56:08 +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] fix unpacking a type alias with detailed tuple spec (#19981)	2025-08-18 17:54:05 -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] Strict validation of protocol members (#17750)	2025-08-19 22:45:41 +00:00
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	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	[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