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diff --git a/decoder/ff.cc b/decoder/ff.cc
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@@ -1,3 +1,5 @@
+//TODO: actually score rule_feature()==true features once only, hash keyed on rule or modify TRule directly? need to keep clear in forest which features come from models vs. rules; then rescoring could drop all the old models features at once
+
//TODO: 0 size state != rule-local feature, i.e. still may depend on source span loc/context. identify truly rule-local features so if we want they can be added to grammar rules (minor speedup)
#include <boost/lexical_cast.hpp>