From 3c642426ea83629c1eedbf5fc877fe51f01ed234 Mon Sep 17 00:00:00 2001
From: Henri Chataing <henrichataing@google.com>
Date: Thu, 2 Nov 2023 22:10:06 +0000
Subject: [PATCH] Ensure compatibility with python 3.8

Change-Id: I8db6ec0239fca889b39317c91f75bf0ddc4f3741
---
 scripts/pdl/ast.py | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/scripts/pdl/ast.py b/scripts/pdl/ast.py
index 4aff1cc..5ade0fa 100644
--- a/scripts/pdl/ast.py
+++ b/scripts/pdl/ast.py
@@ -66,7 +66,7 @@ class Constraint(Node):
 @dataclass
 class Field(Node):
     parent: Node = field(init=False)
-    cond: Optional[Constraint] = field(kw_only=True, default=None)
+    cond: Optional[Constraint] = field(init=False, default=None)
     # Backlink to the (optional) optional field referencing
     # this field as condition.
     cond_for: Optional['Field'] = field(init=False, default=None)
@@ -277,8 +277,14 @@ def convert_(obj: object) -> object:
         loc = SourceRange(loc['file'], SourceLocation(**loc['start']), SourceLocation(**loc['end']))
         constructor = constructors_.get(kind)
         members = {'loc': loc, 'kind': kind}
+        cond = None
         for name, value in obj.items():
-            if name != 'kind' and name != 'loc':
+            if name == 'cond':
+                cond = convert_(value)
+            elif name != 'kind' and name != 'loc':
                 members[name] = convert_(value)
-        return constructor(**members)
+        val = constructor(**members)
+        if cond:
+            val.cond = cond
+        return val
     raise Exception('Unhandled json object type')
-- 
2.42.0.869.gea05f2083d-goog