From ff1cf81380ce8e0cbf0512770b6bb56999210a1b Mon Sep 17 00:00:00 2001
From: Pavel Demin <pavel-demin@outlook.com>
Date: Sat, 5 Oct 2019 11:46:05 +0200
Subject: [PATCH] reimplement enum.auto() for compatibility with older python 3
 versions

---
 ast.py | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/ast.py b/ast.py
index a95b29d..9130ed0 100644
--- a/ast.py
+++ b/ast.py
@@ -1,6 +1,20 @@
 # fx-92 Scientifique Collège+ language interpreter: AST definition
 
-import aenum as enum
+import enum
+
+def auto_builder():
+    number = 0
+    def auto():
+        nonlocal number
+        number += 1
+        return number
+    return auto
+
+try:
+    enum.auto()
+except AttributeError: 
+    enum.auto = auto_builder()
+del auto_builder
 
 #---
 # Internal AST node representation