Include static and class methods in in abstract decorator list (#4298)

crates/ruff/resources/test/fixtures/flake8_bugbear/B027.py

@@ -4,7 +4,12 @@
 """
 import abc
 from abc import ABC
-from abc import abstractmethod, abstractproperty
+from abc import (
+    abstractmethod,
+    abstractproperty,
+    abstractclassmethod,
+    abstractstaticmethod,
+)
 from abc import abstractmethod as notabstract
 from abc import abstractproperty as notabstract_property
 
@@ -55,6 +60,22 @@ def abstract_5(self):
     def abstract_6(self):
         ...
 
+    @abstractclassmethod
+    def abstract_7(self):
+        pass
+
+    @abc.abstractclassmethod
+    def abstract_8(self):
+        ...
+
+    @abstractstaticmethod
+    def abstract_9(self):
+        pass
+
+    @abc.abstractstaticmethod
+    def abstract_10(self):
+        ...
+
     def body_1(self):
         print("foo")
         ...

crates/ruff/src/rules/flake8_bugbear/snapshots/ruff__rules__flake8_bugbear__tests__B027_B027.py.snap

@@ -1,96 +1,96 @@
 ---
 source: crates/ruff/src/rules/flake8_bugbear/mod.rs
 ---
-B027.py:13:5: B027 [*] `AbstractClass.empty_1` is an empty method in an abstract base class, but has no abstract decorator
+B027.py:18:5: B027 [*] `AbstractClass.empty_1` is an empty method in an abstract base class, but has no abstract decorator
    |
-13 |   class AbstractClass(ABC):
-14 |       def empty_1(self):  # error
+18 |   class AbstractClass(ABC):
+19 |       def empty_1(self):  # error
    |  _____^
-15 | |         ...
+20 | |         ...
    | |___________^ B027
-16 |   
-17 |       def empty_2(self):  # error
+21 |   
+22 |       def empty_2(self):  # error
    |
    = help: Add the `@abstractmethod` decorator
 
 ℹ Suggested fix
-10 10 | 
-11 11 | 
-12 12 | class AbstractClass(ABC):
-   13 |+    @notabstract
-13 14 |     def empty_1(self):  # error
-14 15 |         ...
-15 16 | 
+15 15 | 
+16 16 | 
+17 17 | class AbstractClass(ABC):
+   18 |+    @notabstract
+18 19 |     def empty_1(self):  # error
+19 20 |         ...
+20 21 | 
 
-B027.py:16:5: B027 [*] `AbstractClass.empty_2` is an empty method in an abstract base class, but has no abstract decorator
+B027.py:21:5: B027 [*] `AbstractClass.empty_2` is an empty method in an abstract base class, but has no abstract decorator
    |
-16 |           ...
-17 |   
-18 |       def empty_2(self):  # error
+21 |           ...
+22 |   
+23 |       def empty_2(self):  # error
    |  _____^
-19 | |         pass
+24 | |         pass
    | |____________^ B027
-20 |   
-21 |       def empty_3(self):  # error
+25 |   
+26 |       def empty_3(self):  # error
    |
    = help: Add the `@abstractmethod` decorator
 
 ℹ Suggested fix
-13 13 |     def empty_1(self):  # error
-14 14 |         ...
-15 15 | 
-   16 |+    @notabstract
-16 17 |     def empty_2(self):  # error
-17 18 |         pass
-18 19 | 
+18 18 |     def empty_1(self):  # error
+19 19 |         ...
+20 20 | 
+   21 |+    @notabstract
+21 22 |     def empty_2(self):  # error
+22 23 |         pass
+23 24 | 
 
-B027.py:19:5: B027 [*] `AbstractClass.empty_3` is an empty method in an abstract base class, but has no abstract decorator
+B027.py:24:5: B027 [*] `AbstractClass.empty_3` is an empty method in an abstract base class, but has no abstract decorator
    |
-19 |           pass
-20 |   
-21 |       def empty_3(self):  # error
+24 |           pass
+25 |   
+26 |       def empty_3(self):  # error
    |  _____^
-22 | |         """docstring"""
-23 | |         ...
+27 | |         """docstring"""
+28 | |         ...
    | |___________^ B027
-24 |   
-25 |       def empty_4(self):  # error
+29 |   
+30 |       def empty_4(self):  # error
    |
    = help: Add the `@abstractmethod` decorator
 
 ℹ Suggested fix
-16 16 |     def empty_2(self):  # error
-17 17 |         pass
-18 18 | 
-   19 |+    @notabstract
-19 20 |     def empty_3(self):  # error
-20 21 |         """docstring"""
-21 22 |         ...
+21 21 |     def empty_2(self):  # error
+22 22 |         pass
+23 23 | 
+   24 |+    @notabstract
+24 25 |     def empty_3(self):  # error
+25 26 |         """docstring"""
+26 27 |         ...
 
-B027.py:23:5: B027 [*] `AbstractClass.empty_4` is an empty method in an abstract base class, but has no abstract decorator
+B027.py:28:5: B027 [*] `AbstractClass.empty_4` is an empty method in an abstract base class, but has no abstract decorator
    |
-23 |           ...
-24 |   
-25 |       def empty_4(self):  # error
+28 |           ...
+29 |   
+30 |       def empty_4(self):  # error
    |  _____^
-26 | |         """multiple ellipsis/pass"""
-27 | |         ...
-28 | |         pass
-29 | |         ...
-30 | |         pass
+31 | |         """multiple ellipsis/pass"""
+32 | |         ...
+33 | |         pass
+34 | |         ...
+35 | |         pass
    | |____________^ B027
-31 |   
-32 |       @notabstract
+36 |   
+37 |       @notabstract
    |
    = help: Add the `@abstractmethod` decorator
 
 ℹ Suggested fix
-20 20 |         """docstring"""
-21 21 |         ...
-22 22 | 
-   23 |+    @notabstract
-23 24 |     def empty_4(self):  # error
-24 25 |         """multiple ellipsis/pass"""
-25 26 |         ...
+25 25 |         """docstring"""
+26 26 |         ...
+27 27 | 
+   28 |+    @notabstract
+28 29 |     def empty_4(self):  # error
+29 30 |         """multiple ellipsis/pass"""
+30 31 |         ...
 
 

crates/ruff_python_semantic/src/analyze/visibility.rs

@@ -60,13 +60,21 @@ pub fn is_override(ctx: &Context, decorator_list: &[Expr]) -> bool {
         .any(|expr| ctx.match_typing_expr(map_callable(expr), "override"))
 }
 
-/// Returns `true` if a function definition is an `@abstractmethod`.
+/// Returns `true` if a function definition is an abstract method based on its decorators.
 pub fn is_abstract(ctx: &Context, decorator_list: &[Expr]) -> bool {
     decorator_list.iter().any(|expr| {
         ctx.resolve_call_path(map_callable(expr))
             .map_or(false, |call_path| {
-                call_path.as_slice() == ["abc", "abstractmethod"]
-                    || call_path.as_slice() == ["abc", "abstractproperty"]
+                matches!(
+                    call_path.as_slice(),
+                    [
+                        "abc",
+                        "abstractmethod"
+                            | "abstractclassmethod"
+                            | "abstractstaticmethod"
+                            | "abstractproperty"
+                    ]
+                )
             })
     })
 }