From b5c24f2186e40b6f2b409c46fb180ef0eedc5569 Mon Sep 17 00:00:00 2001
From: Andreas Kloeckner <inform@tiker.net>
Date: Tue, 10 May 2011 10:51:09 -0400
Subject: [PATCH] Teach pymbolic about empty-tuple subscripts.

---
 pymbolic/primitives.py | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/pymbolic/primitives.py b/pymbolic/primitives.py
index f194874..401b0a5 100644
--- a/pymbolic/primitives.py
+++ b/pymbolic/primitives.py
@@ -131,8 +131,11 @@ class Expression(object):
         return Call(self, pars)
 
     def __getitem__(self, subscript):
-        return Subscript(self, subscript)
-    
+        if subscript == ():
+            return self
+        else:
+            return Subscript(self, subscript)
+
     def __float__(self):
         from pymbolic.mapper.evaluator import evaluate_to_float
         return evaluate_to_float(self)
-- 
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