[ty] Report deprecated unary operations

crates/ty_python_semantic/resources/mdtest/deprecated.md

@@ -412,6 +412,31 @@ y = MyInt(2)
 z = x + y  # TODO error: [deprecated] "MyInt `+` support is broken"
 ```
 
+Unlike binary operators, unary operators like `~` already fire a diagnostic when their dunder is
+deprecated.
+
+```py
+from typing_extensions import deprecated
+
+class MyBits:
+    @deprecated("MyBits `~` support is broken")
+    def __invert__(self):
+        return self
+
+x = MyBits()
+~x  # error: [deprecated] "MyBits `~` support is broken"
+```
+
+`bool.__invert__` is one such case in typeshed: `~` on a `bool` is deprecated and will be removed in
+Python 3.16. This applies both to `bool` literals and to arbitrary values of type `bool`.
+
+```py
+~True  # error: [deprecated]
+
+def f(x: bool):
+    ~x  # error: [deprecated]
+```
+
 ## Overloads
 
 Overloads can be deprecated, but only trigger warnings when invoked.

crates/ty_python_semantic/resources/mdtest/unary/integers.md

@@ -21,5 +21,9 @@ reveal_type(-True)  # revealed: Literal[-1]
 ```py
 reveal_type(~0)  # revealed: Literal[-1]
 reveal_type(~1)  # revealed: Literal[-2]
-reveal_type(~True)  # revealed: Literal[-2]
+
+# `~` on a `bool` is deprecated and will be removed in Python 3.16.
+# error: [deprecated]
+# revealed: Literal[-2]
+reveal_type(~True)
 ```

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

@@ -10702,7 +10702,12 @@ impl<'db, 'ast> TypeInferenceBuilder<'db, 'ast> {
                 CallArguments::none(),
                 TypeContext::default(),
             ) {
-                Ok(outcome) => outcome.return_type(db, env),
+                Ok(outcome) => {
+                    for callable in outcome.iter_flat() {
+                        self.check_deprecated(unary, callable.callable_type);
+                    }
+                    outcome.return_type(db, env)
+                }
                 Err(e) => {
                     self.report_unsupported_unary_operator(
                         unary,
@@ -10743,7 +10748,26 @@ impl<'db, 'ast> TypeInferenceBuilder<'db, 'ast> {
 
             (ast::UnaryOp::Invert, Type::LiteralValue(literal)) => match literal.kind() {
                 LiteralValueTypeKind::Int(value) => Type::int_literal(!value.as_i64()),
-                LiteralValueTypeKind::Bool(value) => Type::int_literal(!i64::from(value)),
+                LiteralValueTypeKind::Bool(value) => {
+                    // `~bool` is deprecated and will be removed in Python 3.16.
+                    // Then it will become unavailable and the fallback will report it
+                    // as `unsupported-operator`.
+                    if let Some(dunder) = operand_type
+                        .member_lookup_with_policy(
+                            db,
+                            env,
+                            "__invert__",
+                            MemberLookupPolicy::NO_INSTANCE_FALLBACK,
+                        )
+                        .place
+                        .ignore_possibly_undefined()
+                    {
+                        self.check_deprecated(unary, dunder);
+                        Type::int_literal(!i64::from(value))
+                    } else {
+                        fallback_unary_expression_type()
+                    }
+                }
                 _ => fallback_unary_expression_type(),
             },