From 06c639db6b98affab4abf07e57a90e2fcb5402ef Mon Sep 17 00:00:00 2001
From: rcoh <rcoh@mit.edu>
Date: Sat, 5 Feb 2011 22:34:34 -0500
Subject: Early stages of param-binding in xml.  Functional.  RCOH

---
 util/Config.py | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'util/Config.py')

diff --git a/util/Config.py b/util/Config.py
index 6fdb0d4..4153313 100644
--- a/util/Config.py
+++ b/util/Config.py
@@ -1,4 +1,5 @@
 from xml.etree.ElementTree import *
+import re
 import sys
 import xml
 import pdb
@@ -113,6 +114,15 @@ def pullArgsFromItem(parentNode):
 
 def attemptEval(val):
     try:
+        if '${' in val and '}$' in val: #TODO: this could be a little cleaner
+            dictVal = re.sub("'\$\{(.+)\}\$'", "b['\\1']", val) #replace all expressions like {blah} with a['blah']
+            dictVal = re.sub("\$\{(.+)\}\$", "a['\\1']", dictVal) #replace all expressions like {blah} with a['blah']
+            if "'${" and "}$'" in val: #nested lambda madness
+                lambdaVal = eval('lambda a: lambda b: ' + dictVal)
+            else:
+                lambdaVal = eval('lambda a:'+dictVal) #TODO: nested lambdas
+            return lambdaVal  #convert referential objects to lambda expressions which resolve
+            #dynamically
         val = eval(val)
     except (NameError, SyntaxError):
         val = str(val)
-- 
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