- Added a module for tainting data.

1 files changed, 30 insertions, 0 deletions

diff --git a/stdlib/source/lux/data/taint.lux b/stdlib/source/lux/data/taint.lux
new file mode 100644
index 000000000..935d16c72
--- /dev/null
+++ b/stdlib/source/lux/data/taint.lux
@@ -0,0 +1,30 @@
+##  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 [product])))
+
+(type: #export (Tainted a)
+  [a Void])
+
+(def: #export (taint input)
+  (All [a] (-> a (Tainted a)))
+  [input (:! Void [])])
+
+(def: #export (trust input)
+  (All [a] (-> (Tainted a) a))
+  (product;left input))
+
+(def: #export (validate pred input)
+  (All [a] (-> (-> a Bool) (Tainted a) (Maybe a)))
+  (let [value (product;left input)]
+    (if (pred value)
+      (#;Some value)
+      #;None)))
+
+(def: #export (sanitize f input)
+  (All [a] (-> (-> a a) (Tainted a) a))
+  (|> input product;left f))