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$NetBSD: patch-libbase_accumulator.h,v 1.1 2015/09/23 12:00:53 joerg Exp $
--- libbase/accumulator.h.orig 2015-09-17 11:20:41.000000000 +0000
+++ libbase/accumulator.h
@@ -60,6 +60,7 @@ public:
/// There are no tokens for an accumulator_type
virtual unsigned min_tokens() const { return 0; }
virtual unsigned max_tokens() const { return 0; }
+ virtual bool adjacent_tokens_only() const { return true; }
/// Accumulating from different sources is silly.
virtual bool is_composing() const { return false; }
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