1 files changed, 2 insertions, 1 deletions
diff --git a/plugins/org.eclipse.xtend.middleend.old/src/org/eclipse/xtend/middleend/old/OldXpandRegistry.java b/plugins/org.eclipse.xtend.middleend.old/src/org/eclipse/xtend/middleend/old/OldXpandRegistry.java
index 65ef7f73..b42623f7 100644
--- a/plugins/org.eclipse.xtend.middleend.old/src/org/eclipse/xtend/middleend/old/OldXpandRegistry.java
+++ b/plugins/org.eclipse.xtend.middleend.old/src/org/eclipse/xtend/middleend/old/OldXpandRegistry.java
@@ -118,7 +118,8 @@ final class OldXpandRegistry {
         for (String xpandFileName: xpandFileNames)
             registerXpandFile (xpandFileName);
         
-        // ... and register all registered extensions in this fdc
+        // ... and register all template definitions from these files. It is necessary to have them all registered to enable 
+        //  polymorphism - static type analysis does not find all potential matches.
         for (String xpandFileName: xpandFileNames)
             for (NamedFunction f: _functionsByResource.get (xpandFileName))
                 fdc.register(f);