1 files changed, 44 insertions, 0 deletions
diff --git a/stdlib/source/lux/math/logic/continuous.lux b/stdlib/source/lux/math/logic/continuous.lux
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+++ b/stdlib/source/lux/math/logic/continuous.lux
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+##  Copyright (c) Eduardo Julian. All rights reserved.
+##  This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
+##  If a copy of the MPL was not distributed with this file,
+##  You can obtain one at http://mozilla.org/MPL/2.0/.
+
+(;module:
+  lux
+  (lux (data [number "Deg/" Bounded<Deg> Number<Deg>])))
+
+(def: #export TRUE Deg Deg/top)
+(def: #export FALSE Deg Deg/bottom)
+
+(do-template [<name> <chooser>]
+  [(def: #export <name>
+     (-> Deg Deg Deg)
+     <chooser>)]
+
+  [and~ d.min]
+  [or~  d.max]
+  )
+
+(def: #export not~
+  (-> Deg Deg)
+  Deg/negate)
+
+(def: #export (implies~ consequent antecedent)
+  (-> Deg Deg Deg)
+  (or~ (not~ antecedent)
+       consequent))
+
+(def: #export (includes~ sub super)
+  (-> Deg Deg Deg)
+  (let [-sub (not~ sub)
+        sum (d.+ -sub super)
+        no-overflow? (and (d.>= -sub sum)
+                          (d.>= super sum))]
+    (if no-overflow?
+      sum
+      TRUE)))
+
+(def: #export (=~ left right)
+  (-> Deg Deg Deg)
+  (and~ (or~ (not~ left) right)
+        (or~ left (not~ right))))