# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1367425884 -7200
# Node ID 528be963f41a5ec9f28d8886aeb9706dcfc94439
# Parent  098cf40197a39660f20c505bc0244ba70e43c1e8
Fixed the accidental exclusion of modules from the deduction process.

diff -r 098cf40197a3 -r 528be963f41a micropython/deduce.py
--- a/micropython/deduce.py	Sun Apr 28 19:56:18 2013 +0200
+++ b/micropython/deduce.py	Wed May 01 18:31:24 2013 +0200
@@ -68,14 +68,20 @@
         access operations.
         """
 
-        if not used_by_unit(node):
-            return
-
         self.units.append(node.unit)
         self.dispatch(node.node)
         self.units.pop()
 
-    visitModule = visitClass = visitFunction = _visitUnit
+    def _visitOptionalUnit(self, node):
+
+        "Optionally visit a unit, depending on whether it is used."
+
+        if not used_by_unit(node):
+            return
+        self._visitUnit(node)
+
+    visitModule = _visitUnit
+    visitClass = visitFunction = _visitOptionalUnit
 
     def _visitAttr(self, node):