From 60aa439e16018da3a22df285205452b37575c3e2 Mon Sep 17 00:00:00 2001
From: Natalie Weizenbaum <nweiz@google.com>
Date: Mon, 7 Nov 2016 17:18:51 -0800
Subject: [PATCH] Properly declare arguments for opacify et al.

Closes #32
---
 lib/src/functions.dart | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/lib/src/functions.dart b/lib/src/functions.dart
index 4fd8ff34f..02416e8ce 100644
--- a/lib/src/functions.dart
+++ b/lib/src/functions.dart
@@ -273,10 +273,11 @@ void defineCoreFunctions(Environment environment) {
     return new SassNumber(color.alpha);
   });
 
-  environment.defineFunction("opacify", r"$color", _opacify);
-  environment.defineFunction("fade-in", r"$color", _opacify);
-  environment.defineFunction("transparentize", r"$color", _transparentize);
-  environment.defineFunction("fade-out", r"$color", _transparentize);
+  environment.defineFunction("opacify", r"$color, $amount", _opacify);
+  environment.defineFunction("fade-in", r"$color, $amount", _opacify);
+  environment.defineFunction(
+      "transparentize", r"$color, $amount", _transparentize);
+  environment.defineFunction("fade-out", r"$color, $amount", _transparentize);
 
   // ### Miscellaneous