From 810f53a9bf11c9888a7112cd916301dcc5157ffd Mon Sep 17 00:00:00 2001
From: Charlie Marsh <charlie.r.marsh@gmail.com>
Date: Wed, 25 Oct 2023 18:09:36 -0400
Subject: [PATCH] Avoid introducing new parentheses in annotated assignments

---
 .../fixtures/ruff/statement/ann_assign.py     | 11 ++++++
 .../src/statement/stmt_ann_assign.rs          |  7 +---
 .../format@statement__ann_assign.py.snap      | 36 +++++++++++++++++--
 3 files changed, 45 insertions(+), 9 deletions(-)

diff --git a/crates/ruff_python_formatter/resources/test/fixtures/ruff/statement/ann_assign.py b/crates/ruff_python_formatter/resources/test/fixtures/ruff/statement/ann_assign.py
index b965199c982609..3cd52cb2e0ab9c 100644
--- a/crates/ruff_python_formatter/resources/test/fixtures/ruff/statement/ann_assign.py
+++ b/crates/ruff_python_formatter/resources/test/fixtures/ruff/statement/ann_assign.py
@@ -1,6 +1,17 @@
 # Regression test: Don't forget the parentheses in the value when breaking
 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa: int = a + 1 * a
 
+bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb: Bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb = (
+    Bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb()
+)
+
+JSONSerializable: TypeAlias = (
+    "str | int | float | bool | None | list | tuple | JSONMapping"
+)
+
+JSONSerializable: str | int | float | bool | None | list | tuple | JSONMapping = {1, 2, 3, 4}
+
+JSONSerializable: str | int | float | bool | None | list | tuple | JSONMapping = aaaaaaaaaaaaaaaa
 
 # Regression test: Don't forget the parentheses in the annotation when breaking
 class DefaultRunner:
diff --git a/crates/ruff_python_formatter/src/statement/stmt_ann_assign.rs b/crates/ruff_python_formatter/src/statement/stmt_ann_assign.rs
index a29798d4c33160..f22457cc4b56a4 100644
--- a/crates/ruff_python_formatter/src/statement/stmt_ann_assign.rs
+++ b/crates/ruff_python_formatter/src/statement/stmt_ann_assign.rs
@@ -21,12 +21,7 @@ impl FormatNodeRule<StmtAnnAssign> for FormatStmtAnnAssign {
 
         write!(
             f,
-            [
-                target.format(),
-                token(":"),
-                space(),
-                maybe_parenthesize_expression(annotation, item, Parenthesize::IfBreaks)
-            ]
+            [target.format(), token(":"), space(), annotation.format(),]
         )?;
 
         if let Some(value) = value {
diff --git a/crates/ruff_python_formatter/tests/snapshots/format@statement__ann_assign.py.snap b/crates/ruff_python_formatter/tests/snapshots/format@statement__ann_assign.py.snap
index 52d136a3bef135..a27cafa30feb73 100644
--- a/crates/ruff_python_formatter/tests/snapshots/format@statement__ann_assign.py.snap
+++ b/crates/ruff_python_formatter/tests/snapshots/format@statement__ann_assign.py.snap
@@ -7,6 +7,17 @@ input_file: crates/ruff_python_formatter/resources/test/fixtures/ruff/statement/
 # Regression test: Don't forget the parentheses in the value when breaking
 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa: int = a + 1 * a
 
+bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb: Bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb = (
+    Bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb()
+)
+
+JSONSerializable: TypeAlias = (
+    "str | int | float | bool | None | list | tuple | JSONMapping"
+)
+
+JSONSerializable: str | int | float | bool | None | list | tuple | JSONMapping = {1, 2, 3, 4}
+
+JSONSerializable: str | int | float | bool | None | list | tuple | JSONMapping = aaaaaaaaaaaaaaaa
 
 # Regression test: Don't forget the parentheses in the annotation when breaking
 class DefaultRunner:
@@ -20,12 +31,31 @@ aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa: int =
     a + 1 * a
 )
 
+bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb: Bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb = (
+    Bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb()
+)
+
+JSONSerializable: TypeAlias = (
+    "str | int | float | bool | None | list | tuple | JSONMapping"
+)
+
+JSONSerializable: str | int | float | bool | None | list | tuple | JSONMapping = {
+    1,
+    2,
+    3,
+    4,
+}
+
+JSONSerializable: str | int | float | bool | None | list | tuple | JSONMapping = (
+    aaaaaaaaaaaaaaaa
+)
+
 
 # Regression test: Don't forget the parentheses in the annotation when breaking
 class DefaultRunner:
-    task_runner_cls: (
-        TaskRunnerProtocol | typing.Callable[[], typing.Any]
-    ) = DefaultTaskRunner
+    task_runner_cls: TaskRunnerProtocol | typing.Callable[
+        [], typing.Any
+    ] = DefaultTaskRunner
 ```