From 5ca41dc152f3df49d3e7acfe9977186b78b4172d Mon Sep 17 00:00:00 2001
From: Ryan Tsao <rtsao@uber.com>
Date: Tue, 9 Jun 2015 13:23:44 -0700
Subject: [PATCH] at-rule support

---
 lib/parse.js       | 1 +
 lib/stringify.js   | 2 ++
 test/test-cases.js | 7 +++++++
 3 files changed, 10 insertions(+)

diff --git a/lib/parse.js b/lib/parse.js
index 3d52779..300698c 100644
--- a/lib/parse.js
+++ b/lib/parse.js
@@ -168,6 +168,7 @@ var parser = new Parser({
 		":([A-Za-z_\\-0-9]+)\\(": pseudoClassStartMatch,
 		":([A-Za-z_\\-0-9]+)": typeMatch("pseudo-class"),
 		"::([A-Za-z_\\-0-9]+)": typeMatch("pseudo-element"),
+		"@([A-Za-z_\\-0-9]+)": typeMatch("at-rule"),
 		"(\\*\\|)([A-Za-z_\\-0-9]+)": elementMatch,
 		"(\\*\\|)\\*": universalMatch,
 		"([A-Za-z_\\-0-9]*\\|)?\\*": universalMatch,
diff --git a/lib/stringify.js b/lib/stringify.js
index 334dd24..627ffea 100644
--- a/lib/stringify.js
+++ b/lib/stringify.js
@@ -14,6 +14,8 @@ function stringifyWithoutBeforeAfter(tree) {
 		return "." + tree.name;
 	case "id":
 		return "#" + tree.name;
+	case "at-rule":
+		return "@" + tree.name;
 	case "attribute":
 		return "[" + tree.content + "]";
 	case "spacing":
diff --git a/test/test-cases.js b/test/test-cases.js
index 74eb3f1..e339e36 100644
--- a/test/test-cases.js
+++ b/test/test-cases.js
@@ -55,6 +55,13 @@ module.exports = {
 		])
 	],
 
+	"at rule": [
+		"@keyframes",
+		singleSelector([
+			{ type: "at-rule", name: "keyframes" }
+		])
+	],
+
 	"pseudo class": [
 		":before",
 		singleSelector([