From f8d89aee2d5ce87380aaf3b985ae28759ff3abb9 Mon Sep 17 00:00:00 2001
From: s-ol <s-ol@users.noreply.github.com>
Date: Sat, 4 Aug 2018 00:11:15 +0200
Subject: add \transform to reactivevar

---
 app/component.moon      |  4 ++++
 app/test_component.moon | 15 +++++++++++++++
 dist                    |  2 +-
 3 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/app/component.moon b/app/component.moon
index fc29f8c..4f1d0c0 100644
--- a/app/component.moon
+++ b/app/component.moon
@@ -1,5 +1,7 @@
 { :document } = js.global
 
+warn = warn or -> print
+
 -- convert anything to a DOM Node
 -- val must be one of:
 -- * DOM Node (instanceof window.Node)
@@ -39,6 +41,8 @@ class ReactiveVar
 
   get: => @value
 
+  transform: (transform) => @set transform @get!
+
   subscribe: (callback) =>
     with -> @listeners[callback] = nil
       @listeners[callback] = callback
diff --git a/app/test_component.moon b/app/test_component.moon
index 5298175..538368a 100644
--- a/app/test_component.moon
+++ b/app/test_component.moon
@@ -78,6 +78,21 @@ run_test "passed old value as well", ->
   reactive\set 3
   assert done, "expected to reach the end"
 
+run_test "provides transform shorthand", ->
+  local done
+
+  reactive = ReactiveVar 1
+  reactive\subscribe coroutine.wrap (next, last) ->
+    assert last == 1, "expected last:1 to be 1"
+    next, last = coroutine.yield!
+    assert last == 2, "expected last:2 to be 2"
+    done = true
+
+  add_one = (a) -> a + 1
+  reactive\transform add_one
+  reactive\transform add_one
+  assert done, "expected to reach the end"
+
 run_test "#subscribe returns function to unsubscribe", ->
   calls = 0
 
diff --git a/dist b/dist
index 7244d9a..4168b23 160000
--- a/dist
+++ b/dist
@@ -1 +1 @@
-Subproject commit 7244d9a6fc301962748cb69a2ffd8cb277a99d9e
+Subproject commit 4168b2385c2442b4940f60d678a1b8e646bb3a12
-- 
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