Add new checks for match class patterns

Author: cdce8p

doc/data/messages/i/invalid-match-args-definition/bad.py

@@ -0,0 +1,6 @@
+class Book:
+ __match_args__ = ["title", "year"] # [invalid-match-args-definition]
+
+ def __init__(self, title, year):
+ self.title = title
+ self.year = year

doc/data/messages/i/invalid-match-args-definition/good.py

@@ -0,0 +1,6 @@
+class Book:
+ __match_args__ = ("title", "year")
+
+ def __init__(self, title, year):
+ self.title = title
+ self.year = year

doc/data/messages/i/invalid-match-args-definition/related.rst

@@ -0,0 +1 @@
+- `Python documentation <https://docs.python.org/3/reference/datamodel.html#customizing-positional-arguments-in-class-pattern-matching>`_

doc/data/messages/m/multiple-class-sub-patterns/bad.py

@@ -0,0 +1,14 @@
+class Book:
+ __match_args__ = ("title", "year")
+
+ def __init__(self, title, year):
+ self.title = title
+ self.year = year
+
+
+def func(item: Book):
+ match item:
+ case Book("abc", title="abc"): # [multiple-class-sub-patterns]
+ ...
+ case Book(year=2000, year=2001): # [multiple-class-sub-patterns]
+ ...

doc/data/messages/m/multiple-class-sub-patterns/good.py

@@ -0,0 +1,14 @@
+class Book:
+ __match_args__ = ("title", "year")
+
+ def __init__(self, title, year):
+ self.title = title
+ self.year = year
+
+
+def func(item: Book):
+ match item:
+ case Book(title="abc"):
+ ...
+ case Book(year=2000):
+ ...

doc/data/messages/m/multiple-class-sub-patterns/related.rst

@@ -0,0 +1 @@
+- `Python documentation <https://docs.python.org/3/reference/compound_stmts.html#class-patterns>`_

doc/data/messages/t/too-many-positional-sub-patterns/bad.py

@@ -0,0 +1,13 @@
+class Book:
+ __match_args__ = ("title", "year")
+
+ def __init__(self, title, year, author):
+ self.title = title
+ self.year = year
+ self.author = author
+
+
+def func(item: Book):
+ match item:
+ case Book("title", 2000, "author"): # [too-many-positional-sub-patterns]
+ ...

doc/data/messages/t/too-many-positional-sub-patterns/good.py

@@ -0,0 +1,13 @@
+class Book:
+ __match_args__ = ("title", "year")
+
+ def __init__(self, title, year, author):
+ self.title = title
+ self.year = year
+ self.author = author
+
+
+def func(item: Book):
+ match item:
+ case Book("title", 2000, author="author"):
+ ...

doc/data/messages/t/too-many-positional-sub-patterns/related.rst

@@ -0,0 +1 @@
+- `Python documentation <https://docs.python.org/3/reference/compound_stmts.html#class-patterns>`_

doc/data/ruff.toml

@@ -4,6 +4,7 @@ line-length = 103
 
 extend-exclude = [
  "messages/d/duplicate-argument-name/bad.py",
+ "messages/m/multiple-class-sub-patterns/bad.py",
  "messages/s/syntax-error/bad.py",
  # syntax error in newer python versions
  "messages/b/bare-name-capture-pattern/bad.py",