gh-124960: Fixed barry_as_FLUFL future flag does not work in new REPL

Lib/_pyrepl/console.py

@@ -16,6 +16,7 @@
 # RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
 # CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
 # CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+import __future__
 
 from __future__ import annotations
 
@@ -160,6 +161,17 @@ def __init__(
     ) -> None:
         super().__init__(locals=locals, filename=filename, local_exit=local_exit)  # type: ignore[call-arg]
         self.can_colorize = _colorize.can_colorize()
+        self.barry_as_FLUFL = False
+
+    def check_barry_as_FLUFL(self, tree):
+        if self.barry_as_FLUFL:
+            return
+        for node in ast.walk(tree):
+            if isinstance(node, ast.ImportFrom) and node.module == "__future__":
+                if any(alias.name == "barry_as_FLUFL" for alias in node.names):
+                    self.compile.compiler.flags |= getattr(__future__, "barry_as_FLUFL").compiler_flag
+                    self.barry_as_FLUFL = True
+                    break
 
     def showsyntaxerror(self, filename=None, **kwargs):
         super().showsyntaxerror(filename=filename, **kwargs)
@@ -175,6 +187,7 @@ def _excepthook(self, typ, value, tb):
     def runsource(self, source, filename="<input>", symbol="single"):
         try:
             tree = ast.parse(source)
+            self.check_barry_as_FLUFL(tree)
         except (SyntaxError, OverflowError, ValueError):
             self.showsyntaxerror(filename, source=source)
             return False

Misc/NEWS.d/next/Library/2024-10-05-15-49-53.gh-issue-124960.Bol9hT.rst

@@ -0,0 +1 @@
+Fix support for the ``barry_as_FLUFL`` future flag in the new REPL.