From 55beb71dbbfe8421a8e8be9d2d7868a5d87d77d5 Mon Sep 17 00:00:00 2001
From: Chris Dyer <redpony@gmail.com>
Date: Tue, 18 Mar 2014 01:55:19 -0400
Subject: star bool

---
 utils/star.h | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'utils')

diff --git a/utils/star.h b/utils/star.h
index 3295112c..e7358ffa 100644
--- a/utils/star.h
+++ b/utils/star.h
@@ -1,6 +1,8 @@
 #ifndef _STAR_H_
 #define _STAR_H_
 
+// star(x) computes the infinite sum x^0 + x^1 + x^2 + ...
+
 template <typename T>
 T star(const T& x) {
   if (!x) return T();
@@ -9,4 +11,8 @@ T star(const T& x) {
   return T(1) / (T(1) - x);
 }
 
+bool star(bool x) {
+  return x;
+}
+
 #endif
-- 
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