[ty] Use "cannot" consistently over "can not" (#21255)

crates/ruff_formatter/src/format_element.rs

@@ -487,7 +487,7 @@ pub trait FormatElements {
 /// Represents the width by adding 1 to the actual width so that the width can be represented by a [`NonZeroU32`],
 /// allowing [`TextWidth`] or [`Option<Width>`] fit in 4 bytes rather than 8.
 ///
-/// This means that 2^32 can not be precisely represented and instead has the same value as 2^32-1.
+/// This means that 2^32 cannot be precisely represented and instead has the same value as 2^32-1.
 /// This imprecision shouldn't matter in practice because either text are longer than any configured line width
 /// and thus, the text should break.
 #[derive(Copy, Clone, Debug, Eq, PartialEq)]

crates/ruff_python_formatter/src/pattern/mod.rs

@@ -299,7 +299,7 @@ impl<'a> CanOmitOptionalParenthesesVisitor<'a> {
                 }
 
                 // `case 4+3j:` or `case 4-3j:
-                // Can not contain arbitrary expressions. Limited to complex numbers.
+                // Cannot contain arbitrary expressions. Limited to complex numbers.
                 Expr::BinOp(_) => {
                     self.update_max_precedence(OperatorPrecedence::Additive, 1);
                 }

crates/ty_python_semantic/resources/mdtest/annotations/any.md

@@ -118,7 +118,7 @@ def takes_other_protocol(f: OtherProtocol): ...
 takes_other_protocol(SubclassOfAny())
 ```
 
-A subclass of `Any` cannot be assigned to literal types, since those can not be subclassed:
+A subclass of `Any` cannot be assigned to literal types, since those cannot be subclassed:
 
 ```py
 from typing import Any, Literal

crates/ty_python_semantic/resources/mdtest/attributes.md

@@ -1878,7 +1878,7 @@ date.day = 8
 date.month = 4
 date.year = 2025
 
-# error: [unresolved-attribute] "Can not assign object of type `Literal["UTC"]` to attribute `tz` on type `Date` with custom `__setattr__` method."
+# error: [unresolved-attribute] "Cannot assign object of type `Literal["UTC"]` to attribute `tz` on type `Date` with custom `__setattr__` method."
 date.tz = "UTC"
 ```
 
@@ -1894,10 +1894,10 @@ class Frozen:
     existing: int = 1
 
     def __setattr__(self, name, value) -> Never:
-        raise AttributeError("Attributes can not be modified")
+        raise AttributeError("Attributes cannot be modified")
 
 instance = Frozen()
-instance.non_existing = 2  # error: [invalid-assignment] "Can not assign to unresolved attribute `non_existing` on type `Frozen`"
+instance.non_existing = 2  # error: [invalid-assignment] "Cannot assign to unresolved attribute `non_existing` on type `Frozen`"
 instance.existing = 2  # error: [invalid-assignment] "Cannot assign to attribute `existing` on type `Frozen` whose `__setattr__` method returns `Never`/`NoReturn`"
 ```
 
@@ -1949,7 +1949,7 @@ def flag() -> bool:
 class Frozen:
     if flag():
         def __setattr__(self, name, value) -> Never:
-            raise AttributeError("Attributes can not be modified")
+            raise AttributeError("Attributes cannot be modified")
 
 instance = Frozen()
 instance.non_existing = 2  # error: [invalid-assignment]

crates/ty_python_semantic/resources/mdtest/call/dunder.md

@@ -194,7 +194,7 @@ class_with_descriptor_dunder = ClassWithDescriptorDunder()
 reveal_type(class_with_descriptor_dunder[0])  # revealed: str
 ```
 
-## Dunders can not be overwritten on instances
+## Dunders cannot be overwritten on instances
 
 If we attempt to overwrite a dunder method on an instance, it does not affect the behavior of
 implicit dunder calls:

crates/ty_python_semantic/resources/mdtest/call/getattr_static.md

@@ -84,7 +84,7 @@ class E(metaclass=Meta): ...
 reveal_type(inspect.getattr_static(E, "attr"))  # revealed: int
 ```
 
-Metaclass attributes can not be added when probing an instance of the class:
+Metaclass attributes cannot be added when probing an instance of the class:
 
 ```py
 reveal_type(inspect.getattr_static(E(), "attr", "non_existent"))  # revealed: Literal["non_existent"]

crates/ty_python_semantic/resources/mdtest/call/methods.md

@@ -308,7 +308,7 @@ reveal_type(C.f)  # revealed: bound method <class 'C'>.f(arg: int) -> str
 reveal_type(C.f(1))  # revealed: str
 ```
 
-The method `f` can not be accessed from an instance of the class:
+The method `f` cannot be accessed from an instance of the class:
 
 ```py
 # error: [unresolved-attribute] "Object of type `C` has no attribute `f`"

crates/ty_python_semantic/resources/mdtest/dataclasses/dataclasses.md

@@ -424,7 +424,7 @@ from dataclasses import dataclass
 class MyFrozenClass: ...
 
 frozen = MyFrozenClass()
-frozen.x = 2  # error: [invalid-assignment] "Can not assign to unresolved attribute `x` on type `MyFrozenClass`"
+frozen.x = 2  # error: [invalid-assignment] "Cannot assign to unresolved attribute `x` on type `MyFrozenClass`"
 ```
 
 A diagnostic is also emitted if a frozen dataclass is inherited, and an attempt is made to mutate an

crates/ty_python_semantic/resources/mdtest/expression/yield_and_yield_from.md

@@ -26,7 +26,7 @@ def outer_generator():
 ## `yield from` with a custom iterable
 
 `yield from` can also be used with custom iterable types. In that case, the type of the `yield from`
-expression can not be determined
+expression cannot be determined
 
 ```py
 from typing import Generator, TypeVar, Generic

crates/ty_python_semantic/resources/mdtest/ide_support/all_members.md

@@ -130,7 +130,7 @@ static_assert(has_member(C, "base_attr"))
 static_assert(not has_member(C, "non_existent"))
 ```
 
-But instance attributes can not be accessed this way:
+But instance attributes cannot be accessed this way:
 
 ```py
 static_assert(not has_member(C, "instance_attr"))

crates/ty_python_semantic/resources/mdtest/intersection_types.md

@@ -444,7 +444,7 @@ def _(
     reveal_type(i07)  # revealed: Never
     reveal_type(i08)  # revealed: Never
 
-# `bool` is final and can not be subclassed, so `type[bool]` is equivalent to `Literal[bool]`, which
+# `bool` is final and cannot be subclassed, so `type[bool]` is equivalent to `Literal[bool]`, which
 # is disjoint from `type[str]`:
 def example_type_bool_type_str(
     i: Intersection[type[bool], type[str]],

crates/ty_python_semantic/resources/mdtest/ty_extensions.md

@@ -390,7 +390,7 @@ static_assert(not is_single_valued(Literal["a"] | Literal["b"]))
 
 We use `TypeOf` to get the inferred type of an expression. This is useful when we want to refer to
 it in a type expression. For example, if we want to make sure that the class literal type `str` is a
-subtype of `type[str]`, we can not use `is_subtype_of(str, type[str])`, as that would test if the
+subtype of `type[str]`, we cannot use `is_subtype_of(str, type[str])`, as that would test if the
 type `str` itself is a subtype of `type[str]`. Instead, we can use `TypeOf[str]` to get the type of
 the expression `str`:
 

crates/ty_python_semantic/resources/mdtest/type_compendium/any.md

@@ -54,7 +54,7 @@ class Small(Medium): ...
 static_assert(is_assignable_to(Any | Medium, Big))
 static_assert(is_assignable_to(Any | Medium, Medium))
 
-# `Any | Medium` is at least as large as `Medium`, so we can not assign it to `Small`:
+# `Any | Medium` is at least as large as `Medium`, so we cannot assign it to `Small`:
 static_assert(not is_assignable_to(Any | Medium, Small))
 ```
 
@@ -84,7 +84,7 @@ static_assert(is_assignable_to(Small, Intersection[Any, Medium]))
 static_assert(is_assignable_to(Medium, Intersection[Any, Medium]))
 ```
 
-`Any & Medium` is no larger than `Medium`, so we can not assign `Big` to it. There is no possible
+`Any & Medium` is no larger than `Medium`, so we cannot assign `Big` to it. There is no possible
 materialization of `Any & Medium` that would make it as big as `Big`:
 
 ```py

crates/ty_python_semantic/resources/mdtest/type_compendium/integer_literals.md

@@ -32,8 +32,8 @@ static_assert(not is_singleton(Literal[1]))
 static_assert(not is_singleton(Literal[54165]))
 ```
 
-This has implications for type-narrowing. For example, you can not use the `is not` operator to
+This has implications for type-narrowing. For example, you cannot use the `is not` operator to check
-check whether a variable has a specific integer literal type, but this is not a recommended practice
+whether a variable has a specific integer literal type, but this is not a recommended practice
 anyway.
 
 ```py
@@ -44,7 +44,7 @@ def f(x: int):
         reveal_type(x)  # revealed: Literal[54165]
 
     if x is not 54165:
-        # But here, we can not narrow the type (to `int & ~Literal[54165]`), because `x` might also
+        # But here, we cannot narrow the type (to `int & ~Literal[54165]`), because `x` might also
         # have the value `54165`, but a different object identity.
         reveal_type(x)  # revealed: int
 ```

crates/ty_python_semantic/resources/mdtest/type_properties/is_disjoint_from.md

@@ -45,7 +45,7 @@ class C(B1, B2): ...
 # ... which lies in their intersection:
 static_assert(is_subtype_of(C, Intersection[B1, B2]))
 
-# However, if a class is marked final, it can not be subclassed ...
+# However, if a class is marked final, it cannot be subclassed ...
 @final
 class FinalSubclass(A): ...
 

crates/ty_python_semantic/resources/mdtest/typed_dict.md

@@ -680,7 +680,7 @@ def _(p: Person) -> None:
     reveal_type(p.__class__)  # revealed: <class 'dict[str, object]'>
 ```
 
-Also, the "attributes" on the class definition can not be accessed. Neither on the class itself, nor
+Also, the "attributes" on the class definition cannot be accessed. Neither on the class itself, nor
 on inhabitants of the type defined by the class:
 
 ```py
@@ -714,7 +714,7 @@ reveal_type(Person.__required_keys__)  # revealed: frozenset[str]
 reveal_type(Person.__optional_keys__)  # revealed: frozenset[str]
 ```
 
-These attributes can not be accessed on inhabitants:
+These attributes cannot be accessed on inhabitants:
 
 ```py
 def _(person: Person) -> None:
@@ -723,7 +723,7 @@ def _(person: Person) -> None:
     person.__optional_keys__  # error: [unresolved-attribute]
 ```
 
-Also, they can not be accessed on `type(person)`, as that would be `dict` at runtime:
+Also, they cannot be accessed on `type(person)`, as that would be `dict` at runtime:
 
 ```py
 def _(person: Person) -> None:

crates/ty_python_semantic/resources/mdtest/unreachable.md

@@ -187,8 +187,8 @@ python-platform = "all"
 
 If `python-platform` is set to `all`, we treat the platform as unspecified. This means that we do
 not infer a literal type like `Literal["win32"]` for `sys.platform`, but instead fall back to
-`LiteralString` (the `typeshed` annotation for `sys.platform`). This means that we can not
+`LiteralString` (the `typeshed` annotation for `sys.platform`). This means that we cannot statically
-statically determine the truthiness of a branch like `sys.platform == "win32"`.
+determine the truthiness of a branch like `sys.platform == "win32"`.
 
 See <https://github.com/astral-sh/ruff/issues/16983#issuecomment-2777146188> for a plan on how this
 could be improved.

crates/ty_python_semantic/src/place.rs

@@ -733,7 +733,7 @@ pub(crate) fn place_by_id<'db>(
     };
 
     // If a symbol is undeclared, but qualified with `typing.Final`, we use the right-hand side
-    // inferred type, without unioning with `Unknown`, because it can not be modified.
+    // inferred type, without unioning with `Unknown`, because it cannot be modified.
     if let Some(qualifiers) = declared.is_bare_final() {
         let bindings = all_considered_bindings();
         return place_from_bindings_impl(db, bindings, requires_explicit_reexport)

crates/ty_python_semantic/src/semantic_index/reachability_constraints.rs

@@ -13,7 +13,7 @@
 //! of `test`. When evaluating a constraint, there are three possible outcomes: always true, always
 //! false, or ambiguous. For a simple constraint like this, always-true and always-false correspond
 //! to the case in which we can infer that the type of `test` is `Literal[True]` or `Literal[False]`.
-//! In any other case, like if the type of `test` is `bool` or `Unknown`, we can not statically
+//! In any other case, like if the type of `test` is `bool` or `Unknown`, we cannot statically
 //! determine whether `test` is truthy or falsy, so the outcome would be "ambiguous".
 //!
 //!
@@ -29,7 +29,7 @@
 //! Here, we would accumulate a reachability constraint of `test1 AND test2`. We can statically
 //! determine that this position is *always* reachable only if both `test1` and `test2` are
 //! always true. On the other hand, we can statically determine that this position is *never*
-//! reachable if *either* `test1` or `test2` is always false. In any other case, we can not
+//! reachable if *either* `test1` or `test2` is always false. In any other case, we cannot
 //! determine whether this position is reachable or not, so the outcome is "ambiguous". This
 //! corresponds to a ternary *AND* operation in [Kleene] logic:
 //!
@@ -60,7 +60,7 @@
 //! The third branch ends in a terminal statement [^1]. When we merge control flow, we need to consider
 //! the reachability through either the first or the second branch. The current position is only
 //! *definitely* unreachable if both `test1` and `test2` are always false. It is definitely
-//! reachable if *either* `test1` or `test2` is always true. In any other case, we can not statically
+//! reachable if *either* `test1` or `test2` is always true. In any other case, we cannot statically
 //! determine whether it is reachable or not. This operation corresponds to a ternary *OR* operation:
 //!
 //! ```text
@@ -91,7 +91,7 @@
 //! ## Explicit ambiguity
 //!
 //! In some cases, we explicitly record an “ambiguous” constraint. We do this when branching on
-//! something that we can not (or intentionally do not want to) analyze statically. `for` loops are
+//! something that we cannot (or intentionally do not want to) analyze statically. `for` loops are
 //! one example:
 //! ```py
 //! def _():

crates/ty_python_semantic/src/subscript.rs

@@ -27,7 +27,7 @@ fn from_negative_i32(index: i32) -> usize {
     static_assertions::const_assert!(usize::BITS >= 32);
 
     index.checked_neg().map(from_nonnegative_i32).unwrap_or({
-        // 'checked_neg' only fails for i32::MIN. We can not
+        // 'checked_neg' only fails for i32::MIN. We cannot
         // represent -i32::MIN as a i32, but we can represent
         // it as a usize, since usize is at least 32 bits.
         from_nonnegative_i32(i32::MAX) + 1

crates/ty_python_semantic/src/types.rs

@@ -297,7 +297,7 @@ impl AttributeKind {
 /// When invoked on a class object, the fallback type (a class attribute) can shadow a
 /// non-data descriptor of the meta-type (the class's metaclass). However, this is not
 /// true for instances. When invoked on an instance, the fallback type (an attribute on
-/// the instance) can not completely shadow a non-data descriptor of the meta-type (the
+/// the instance) cannot completely shadow a non-data descriptor of the meta-type (the
 /// class), because we do not currently attempt to statically infer if an instance
 /// attribute is definitely defined (i.e. to check whether a particular method has been
 /// called).
@@ -4412,7 +4412,7 @@ impl<'db> Type<'db> {
                 };
 
                 if result.is_class_var() && self.is_typed_dict() {
-                    // `ClassVar`s on `TypedDictFallback` can not be accessed on inhabitants of `SomeTypedDict`.
+                    // `ClassVar`s on `TypedDictFallback` cannot be accessed on inhabitants of `SomeTypedDict`.
                     // They can only be accessed on `SomeTypedDict` directly.
                     return Place::Undefined.into();
                 }
@@ -12050,7 +12050,7 @@ pub(crate) mod tests {
         assert!(todo1.is_assignable_to(&db, int));
 
         // We lose information when combining several `Todo` types. This is an
-        // acknowledged limitation of the current implementation. We can not
+        // acknowledged limitation of the current implementation. We cannot
         // easily store the meta information of several `Todo`s in a single
         // variant, as `TodoType` needs to implement `Copy`, meaning it can't
         // contain `Vec`/`Box`/etc., and can't be boxed itself.

crates/ty_python_semantic/src/types/diagnostic.rs

@@ -2000,7 +2000,7 @@ pub(super) fn report_slice_step_size_zero(context: &InferContext, node: AnyNodeR
     let Some(builder) = context.report_lint(&ZERO_STEPSIZE_IN_SLICE, node) else {
         return;
     };
-    builder.into_diagnostic("Slice step size can not be zero");
+    builder.into_diagnostic("Slice step size cannot be zero");
 }
 
 fn report_invalid_assignment_with_message(

crates/ty_python_semantic/src/types/generics.rs

@@ -714,7 +714,7 @@ fn is_subtype_in_invariant_position<'db>(
         // TODO:
         // This should be removed and properly handled in the respective
         // `(Type::TypeVar(_), _) | (_, Type::TypeVar(_))` branch of
-        // `Type::has_relation_to_impl`. Right now, we can not generally
+        // `Type::has_relation_to_impl`. Right now, we cannot generally
         // return `ConstraintSet::from(true)` from that branch, as that
         // leads to union simplification, which means that we lose track
         // of type variables without recording the constraints under which

crates/ty_python_semantic/src/types/infer/builder.rs

@@ -3804,7 +3804,7 @@ impl<'db, 'ast> TypeInferenceBuilder<'db, 'ast> {
 
                                     let msg = if !member_exists {
                                         format!(
-                                            "Can not assign to unresolved attribute `{attribute}` on type `{}`",
+                                            "Cannot assign to unresolved attribute `{attribute}` on type `{}`",
                                             object_ty.display(db)
                                         )
                                     } else if is_setattr_synthesized {
@@ -3840,7 +3840,7 @@ impl<'db, 'ast> TypeInferenceBuilder<'db, 'ast> {
                                 self.context.report_lint(&UNRESOLVED_ATTRIBUTE, target)
                             {
                                 builder.into_diagnostic(format_args!(
-                                    "Can not assign object of type `{}` to attribute \
+                                    "Cannot assign object of type `{}` to attribute \
                                      `{attribute}` on type `{}` with \
                                      custom `__setattr__` method.",
                                     value_ty.display(db),