Apply PEP 614

Check 'Named Expressions Need Not Be Parenthesized' Section

Author: ChJR

Lib/test/test_decorators.py

@@ -199,13 +199,12 @@ def unimp(func):
             code = compile(codestr, "test", "exec")
             self.assertRaises(exc, eval, code, context)
 
-    # TODO: RUSTPYTHON; := operator is invalid syntax
-    # def test_expressions(self):
-    #     for expr in (
-    #         "(x,)", "(x, y)", "x := y", "(x := y)", "x @y", "(x @ y)", "x[0]",
-    #         "w[x].y.z", "w + x - (y + z)", "x(y)()(z)", "[w, x, y][z]", "x.y",
-    #     ):
-    #         compile(f"@{expr}\ndef f(): pass", "test", "exec")
+    def test_expressions(self):
+        for expr in (
+            "(x,)", "(x, y)", "x := y", "(x := y)", "x @y", "(x @ y)", "x[0]",
+            "w[x].y.z", "w + x - (y + z)", "x(y)()(z)", "[w, x, y][z]", "x.y",
+        ):
+            compile(f"@{expr}\ndef f(): pass", "test", "exec")
 
     def test_double(self):
         class C(object):

parser/src/python.lalrpop

@@ -634,7 +634,7 @@ ClassDef: ast::Stmt = {
 
 // Decorators:
 Decorator: ast::Expr = {
-    <location:@L>"@" <p:Test> "\n" => {
+    <location:@L>"@" <p:NamedExpressionTest> "\n" => {
         p
     },
 };