From 6253da740b94c3952bd3ca07e4d04caf64b51c97 Mon Sep 17 00:00:00 2001
From: Christophe Coevoet <stof@notk.org>
Date: Wed, 20 Oct 2021 22:15:10 +0200
Subject: [PATCH] Fix the parsing of scientific notation in keyframe selectors
 (#1510)

---
 lib/src/parse/keyframe_selector.dart | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/lib/src/parse/keyframe_selector.dart b/lib/src/parse/keyframe_selector.dart
index 1229b6d61..f19dfaa0a 100644
--- a/lib/src/parse/keyframe_selector.dart
+++ b/lib/src/parse/keyframe_selector.dart
@@ -57,10 +57,10 @@ class KeyframeSelectorParser extends Parser {
       }
     }
 
-    if (scanIdentifier("e")) {
-      buffer.write(scanner.readChar());
+    if (scanIdentChar($e)) {
+      buffer.writeCharCode($e);
       var next = scanner.peekChar();
-      if (next == $plus || next == $minus) buffer.write(scanner.readChar());
+      if (next == $plus || next == $minus) buffer.writeCharCode(scanner.readChar());
       if (!isDigit(scanner.peekChar())) scanner.error("Expected digit.");
 
       while (isDigit(scanner.peekChar())) {