From c4c6ece6d29900e5cf73c65710ed3888ad09df98 Mon Sep 17 00:00:00 2001
From: Simon Forman <sforman@hushmail.com>
Date: Tue, 16 Jul 2019 08:41:28 -0700
Subject: [PATCH] Add bool function to mimic Python semantics.

---
 joy/library.py | 1 -
 thun/defs.txt  | 1 +
 2 files changed, 1 insertion(+), 1 deletion(-)

diff --git a/joy/library.py b/joy/library.py
index eb911bb..e6920af 100644
--- a/joy/library.py
+++ b/joy/library.py
@@ -908,7 +908,6 @@ S_pop = Symbol('pop')
 S_step = Symbol('step')
 S_times = Symbol('times')
 S_swaack = Symbol('swaack')
-S_truthy = Symbol('truthy')
 
 
 @inscribe
diff --git a/thun/defs.txt b/thun/defs.txt
index c2c4a5c..741ba8a 100644
--- a/thun/defs.txt
+++ b/thun/defs.txt
@@ -1,5 +1,6 @@
 -- == 1 -
 ++ == 1 +
+?  == dup bool
 anamorphism == [pop []] swap [dip swons] genrec
 app1 == grba infrst
 app2 == [grba swap grba swap] dip [infrst] cons ii