X-Git-Url: http://git.demorecorder.com/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=xcbgen%2Fexpr.py;h=a03703f4fd248b11653d1c7cbcf247b41e5e4f77;hb=8c5c89f9f6c8e2b7334bdf19d47209e1ade4ef7c;hp=e4fb06e93120f63ee88092b82a51b143f82b8d97;hpb=127d34ac4fc42ecf005f9f2ef02a0e4b74ad1cb3;p=free-sw%2Fxcb%2Fproto

diff --git a/xcbgen/expr.py b/xcbgen/expr.py
index e4fb06e..a03703f 100644
--- a/xcbgen/expr.py
+++ b/xcbgen/expr.py
@@ -22,6 +22,7 @@ class Field(object):
         self.wire = wire
         self.auto = auto
         self.isfd = isfd
+        self.parent = None
 
 
 class Expression(object):
@@ -103,6 +104,12 @@ class Expression(object):
         elif elt.tag == 'sumof':
             self.op = 'sumof'
             self.lenfield_name = elt.get('ref')
+            subexpressions = list(elt)
+            if len(subexpressions) > 0:
+                # sumof with a nested expression which is to be evaluated
+                # for each list-element in the context of that list-element.
+                # sumof then returns the sum of the results of these evaluations
+                self.rhs = Expression(subexpressions[0], parent)
 
         else:
             # Notreached