[ty] Don't suggest things that aren't subclasses of BaseException after raise

This only applies to items that have a type associated with them. That
is, things that are already in scope. For items that don't have a type
associated with them (i.e., suggestions from auto-import), we still
suggest them since we can't know if they're appropriate or not. It's not
quite clear on how best to improve here for the auto-import case. (Short
of, say, asking for the type of each such symbol. But the performance
implications of that aren't known yet.)

Note that because of auto-import, we were still suggesting
`NotImplemented` even though astral-sh/ty#1262 specifically cites it as
the motivating example that we *shouldn't* suggest. This was occuring
because auto-import was including symbols from the `builtins` module,
even though those are actually already in scope. So this PR also gets
rid of those suggestions from auto-import.

Overall, this means that, at least, `raise NotImpl` won't suggest
`NotImplemented`.

Fixes astral-sh/ty#1262

crates/ty_python_semantic/src/lib.rs

@@ -12,8 +12,8 @@ pub use db::Db;
 pub use diagnostic::add_inferred_python_version_hint_to_diagnostic;
 pub use module_name::{ModuleName, ModuleNameResolutionError};
 pub use module_resolver::{
-    Module, SearchPath, SearchPathValidationError, SearchPaths, all_modules, list_modules,
-    resolve_module, resolve_real_module, system_module_search_paths,
+    KnownModule, Module, SearchPath, SearchPathValidationError, SearchPaths, all_modules,
+    list_modules, resolve_module, resolve_real_module, system_module_search_paths,
 };
 pub use program::{
     Program, ProgramSettings, PythonVersionFileSource, PythonVersionSource,

crates/ty_python_semantic/src/module_resolver/mod.rs

@@ -1,7 +1,7 @@
 use std::iter::FusedIterator;
 
 pub use list::{all_modules, list_modules};
-pub(crate) use module::KnownModule;
+pub use module::KnownModule;
 pub use module::Module;
 pub use path::{SearchPath, SearchPathValidationError};
 pub use resolver::SearchPaths;

crates/ty_python_semantic/src/module_resolver/module.rs

@@ -67,7 +67,7 @@ impl<'db> Module<'db> {
     }
 
     /// Does this module represent the given known module?
-    pub(crate) fn is_known(self, db: &'db dyn Database, known_module: KnownModule) -> bool {
+    pub fn is_known(self, db: &'db dyn Database, known_module: KnownModule) -> bool {
         self.known(db) == Some(known_module)
     }
 

crates/ty_python_semantic/src/types.rs

@@ -74,7 +74,8 @@ use crate::types::variance::VarianceInferable;
 use crate::types::visitor::{any_over_type, exceeds_max_specialization_depth};
 use crate::unpack::EvaluationMode;
 use crate::{Db, FxOrderSet, Module, Program};
-pub(crate) use class::{ClassLiteral, ClassType, GenericAlias, KnownClass};
+pub use class::KnownClass;
+pub(crate) use class::{ClassLiteral, ClassType, GenericAlias};
 use instance::Protocol;
 pub use instance::{NominalInstanceType, ProtocolInstanceType};
 pub use special_form::SpecialFormType;
@@ -892,7 +893,7 @@ impl<'db> Type<'db> {
         !(check_dunder("__eq__", true) && check_dunder("__ne__", false))
     }
 
-    pub(crate) fn is_notimplemented(&self, db: &'db dyn Db) -> bool {
+    pub fn is_notimplemented(&self, db: &'db dyn Db) -> bool {
         self.is_instance_of(db, KnownClass::NotImplementedType)
     }
 
@@ -1670,8 +1671,8 @@ impl<'db> Type<'db> {
 
     /// Return true if this type is assignable to type `target`.
     ///
-    /// See [`TypeRelation::Assignability`] for more details.
-    pub(crate) fn is_assignable_to(self, db: &'db dyn Db, target: Type<'db>) -> bool {
+    /// See `TypeRelation::Assignability` for more details.
+    pub fn is_assignable_to(self, db: &'db dyn Db, target: Type<'db>) -> bool {
         self.when_assignable_to(db, target, InferableTypeVars::None)
             .is_always_satisfied(db)
     }
@@ -12108,7 +12109,7 @@ impl get_size2::GetSize for UnionType<'_> {}
 impl<'db> UnionType<'db> {
     /// Create a union from a list of elements
     /// (which may be eagerly simplified into a different variant of [`Type`] altogether).
-    pub(crate) fn from_elements<I, T>(db: &'db dyn Db, elements: I) -> Type<'db>
+    pub fn from_elements<I, T>(db: &'db dyn Db, elements: I) -> Type<'db>
     where
         I: IntoIterator<Item = T>,
         T: Into<Type<'db>>,

crates/ty_python_semantic/src/types/class.rs

@@ -4743,7 +4743,7 @@ impl KnownClass {
     ///
     /// If the class cannot be found in typeshed, a debug-level log message will be emitted stating this.
     #[track_caller]
-    pub(crate) fn to_instance(self, db: &dyn Db) -> Type<'_> {
+    pub fn to_instance(self, db: &dyn Db) -> Type<'_> {
         debug_assert_ne!(
             self,
             KnownClass::Tuple,
@@ -4896,7 +4896,7 @@ impl KnownClass {
     /// representing that class and all possible subclasses of the class.
     ///
     /// If the class cannot be found in typeshed, a debug-level log message will be emitted stating this.
-    pub(crate) fn to_subclass_of(self, db: &dyn Db) -> Type<'_> {
+    pub fn to_subclass_of(self, db: &dyn Db) -> Type<'_> {
         self.to_class_literal(db)
             .to_class_type(db)
             .map(|class| SubclassOfType::from(db, class))