Merge branch 'master' into fix/narrowing_unreachable_try_finally

# Conflicts:
#	mypy/checker.py

Author: tyralla

misc/self_compile_info.py

@@ -0,0 +1,45 @@
+"""Print list of files compiled when compiling self (mypy and mypyc)."""
+
+import argparse
+import sys
+from typing import Any
+
+import setuptools
+
+import mypyc.build
+
+
+class FakeExtension:
+    def __init__(self, *args: Any, **kwargs: Any) -> None:
+        pass
+
+
+def fake_mypycify(args: list[str], **kwargs: Any) -> list[FakeExtension]:
+    for target in sorted(args):
+        if not target.startswith("-"):
+            print(target)
+    return [FakeExtension()]
+
+
+def fake_setup(*args: Any, **kwargs: Any) -> Any:
+    pass
+
+
+def main() -> None:
+    parser = argparse.ArgumentParser(
+        description="Print list of files compiled when compiling self. Run in repository root."
+    )
+    parser.parse_args()
+
+    # Prepare fake state for running setup.py.
+    mypyc.build.mypycify = fake_mypycify  # type: ignore[assignment]
+    setuptools.Extension = FakeExtension  # type: ignore[misc, assignment]
+    setuptools.setup = fake_setup
+    sys.argv = [sys.argv[0], "--use-mypyc"]
+
+    # Run setup.py at the root of the repository.
+    import setup  # noqa: F401
+
+
+if __name__ == "__main__":
+    main()

mypy/checker.py

@@ -26,6 +26,7 @@
 from mypy.erasetype import erase_type, erase_typevars, remove_instance_last_known_values
 from mypy.errorcodes import TYPE_VAR, UNUSED_AWAITABLE, UNUSED_COROUTINE, ErrorCode
 from mypy.errors import (
+    ErrorInfo,
     Errors,
     ErrorWatcher,
     IterationErrorWatcher,
@@ -123,7 +124,6 @@
     TypeAlias,
     TypeAliasStmt,
     TypeInfo,
-    TypeVarExpr,
     UnaryExpr,
     Var,
     WhileStmt,
@@ -673,11 +673,9 @@ def _visit_overloaded_func_def(self, defn: OverloadedFuncDef) -> None:
             assert isinstance(defn.items[0], Decorator)
             self.visit_decorator(defn.items[0])
             if defn.items[0].var.is_settable_property:
-                # TODO: here and elsewhere we assume setter immediately follows getter.
-                assert isinstance(defn.items[1], Decorator)
                 # Perform a reduced visit just to infer the actual setter type.
-                self.visit_decorator_inner(defn.items[1], skip_first_item=True)
-                setter_type = defn.items[1].var.type
+                self.visit_decorator_inner(defn.setter, skip_first_item=True)
+                setter_type = defn.setter.var.type
                 # Check if the setter can accept two positional arguments.
                 any_type = AnyType(TypeOfAny.special_form)
                 fallback_setter_type = CallableType(
@@ -688,7 +686,7 @@ def _visit_overloaded_func_def(self, defn: OverloadedFuncDef) -> None:
                     fallback=self.named_type("builtins.function"),
                 )
                 if setter_type and not is_subtype(setter_type, fallback_setter_type):
-                    self.fail("Invalid property setter signature", defn.items[1].func)
+                    self.fail("Invalid property setter signature", defn.setter.func)
                 setter_type = self.extract_callable_type(setter_type, defn)
                 if not isinstance(setter_type, CallableType) or len(setter_type.arg_types) != 2:
                     # TODO: keep precise type for callables with tricky but valid signatures.
@@ -2147,7 +2145,7 @@ def check_setter_type_override(self, defn: OverloadedFuncDef, base: TypeInfo) ->
         assert typ is not None and original_type is not None
 
         if not is_subtype(original_type, typ):
-            self.msg.incompatible_setter_override(defn.items[1], typ, original_type, base)
+            self.msg.incompatible_setter_override(defn.setter, typ, original_type, base)
 
     def check_method_override_for_base_with_name(
         self, defn: FuncDef | OverloadedFuncDef | Decorator, name: str, base: TypeInfo
@@ -2836,29 +2834,6 @@ def check_multiple_inheritance(self, typ: TypeInfo) -> None:
                 if name in base2.names and base2 not in base.mro:
                     self.check_compatibility(name, base, base2, typ)
 
-    def determine_type_of_member(self, sym: SymbolTableNode) -> Type | None:
-        # TODO: this duplicates both checkmember.py and analyze_ref_expr(), delete.
-        if sym.type is not None:
-            return sym.type
-        if isinstance(sym.node, SYMBOL_FUNCBASE_TYPES):
-            return self.function_type(sym.node)
-        if isinstance(sym.node, TypeInfo):
-            if sym.node.typeddict_type:
-                # We special-case TypedDict, because they don't define any constructor.
-                return self.expr_checker.typeddict_callable(sym.node)
-            else:
-                return type_object_type(sym.node, self.named_type)
-        if isinstance(sym.node, TypeVarExpr):
-            # Use of TypeVars is rejected in an expression/runtime context, so
-            # we don't need to check supertype compatibility for them.
-            return AnyType(TypeOfAny.special_form)
-        if isinstance(sym.node, TypeAlias):
-            with self.msg.filter_errors():
-                # Suppress any errors, they will be given when analyzing the corresponding node.
-                # Here we may have incorrect options and location context.
-                return self.expr_checker.alias_type_in_runtime_context(sym.node, ctx=sym.node)
-        return None
-
     def check_compatibility(
         self, name: str, base1: TypeInfo, base2: TypeInfo, ctx: TypeInfo
     ) -> None:
@@ -7195,7 +7170,7 @@ def check_subtype(
         if extra_info:
             msg = msg.with_additional_msg(" (" + ", ".join(extra_info) + ")")
 
-        self.fail(msg, context)
+        error = self.fail(msg, context)
         for note in notes:
             self.msg.note(note, context, code=msg.code)
         if note_msg:
@@ -7206,7 +7181,7 @@ def check_subtype(
             and supertype.type.is_protocol
             and isinstance(subtype, (CallableType, Instance, TupleType, TypedDictType))
         ):
-            self.msg.report_protocol_problems(subtype, supertype, context, code=msg.code)
+            self.msg.report_protocol_problems(subtype, supertype, context, parent_error=error)
         if isinstance(supertype, CallableType) and isinstance(subtype, Instance):
             call = find_member("__call__", subtype, subtype, is_operator=True)
             if call:
@@ -7535,12 +7510,11 @@ def temp_node(self, t: Type, context: Context | None = None) -> TempNode:
 
     def fail(
         self, msg: str | ErrorMessage, context: Context, *, code: ErrorCode | None = None
-    ) -> None:
+    ) -> ErrorInfo:
         """Produce an error message."""
         if isinstance(msg, ErrorMessage):
-            self.msg.fail(msg.value, context, code=msg.code)
-            return
-        self.msg.fail(msg, context, code=code)
+            return self.msg.fail(msg.value, context, code=msg.code)
+        return self.msg.fail(msg, context, code=code)
 
     def note(
         self,

mypy/checker_shared.py

@@ -21,7 +21,7 @@
     MypyFile,
     Node,
     RefExpr,
-    TypeAlias,
+    SymbolNode,
     TypeInfo,
     Var,
 )
@@ -64,10 +64,6 @@ def accept(
     def analyze_ref_expr(self, e: RefExpr, lvalue: bool = False) -> Type:
         raise NotImplementedError
 
-    @abstractmethod
-    def module_type(self, node: MypyFile) -> Instance:
-        raise NotImplementedError
-
     @abstractmethod
     def check_call(
         self,
@@ -112,24 +108,26 @@ def check_method_call_by_name(
     ) -> tuple[Type, Type]:
         raise NotImplementedError
 
-    @abstractmethod
-    def alias_type_in_runtime_context(
-        self, alias: TypeAlias, *, ctx: Context, alias_definition: bool = False
-    ) -> Type:
-        raise NotImplementedError
-
     @abstractmethod
     def visit_typeddict_index_expr(
         self, td_type: TypedDictType, index: Expression, setitem: bool = False
     ) -> tuple[Type, set[str]]:
         raise NotImplementedError
 
     @abstractmethod
-    def typeddict_callable(self, info: TypeInfo) -> CallableType:
+    def infer_literal_expr_type(self, value: LiteralValue, fallback_name: str) -> Type:
         raise NotImplementedError
 
     @abstractmethod
-    def infer_literal_expr_type(self, value: LiteralValue, fallback_name: str) -> Type:
+    def analyze_static_reference(
+        self,
+        node: SymbolNode,
+        ctx: Context,
+        is_lvalue: bool,
+        *,
+        include_modules: bool = True,
+        suppress_errors: bool = False,
+    ) -> Type:
         raise NotImplementedError