From d0771e7fab2cb9553b0c2043d128d1f26b44fa1e Mon Sep 17 00:00:00 2001
From: Natalie Weizenbaum <nweiz@google.com>
Date: Fri, 28 Oct 2016 14:20:19 -0700
Subject: [PATCH] Parse progid expressions like Ruby Sass.

---
 lib/src/parse/stylesheet.dart | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/src/parse/stylesheet.dart b/lib/src/parse/stylesheet.dart
index ec8aa406..33d0e33d 100644
--- a/lib/src/parse/stylesheet.dart
+++ b/lib/src/parse/stylesheet.dart
@@ -1762,7 +1762,11 @@ abstract class StylesheetParser extends Parser {
         buffer = new InterpolationBuffer()
           ..write(name)
           ..writeCharCode($colon);
-        buffer.write(identifier());
+        var next = scanner.peekChar();
+        while (next != null && (isAlphabetic(next) || next == $dot)) {
+          buffer.writeCharCode(scanner.readChar());
+          next = scanner.peekChar();
+        }
         scanner.expectChar($lparen);
         buffer.writeCharCode($lparen);
         break;