From a8021fafc4ffb13bbbb0c0cec137f651a28dd429 Mon Sep 17 00:00:00 2001
From: laoxiong <gebilaoxiong@gmail.com>
Date: Thu, 17 Aug 2017 03:51:56 +0800
Subject: [PATCH] chore: add comment for whitespace char code (#676)

---
 src/tokenizer/index.js | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/src/tokenizer/index.js b/src/tokenizer/index.js
index de2e0decd7..760ccf5ee8 100644
--- a/src/tokenizer/index.js
+++ b/src/tokenizer/index.js
@@ -283,19 +283,19 @@ export default class Tokenizer extends LocationParser {
     loop: while (this.state.pos < this.input.length) {
       const ch = this.input.charCodeAt(this.state.pos);
       switch (ch) {
-        case 32:
-        case 160: // ' '
+        case 32: // space
+        case 160: // non-breaking space
           ++this.state.pos;
           break;
 
-        case 13:
+        case 13: // '\r' carriage return
           if (this.input.charCodeAt(this.state.pos + 1) === 10) {
             ++this.state.pos;
           }
 
-        case 10:
-        case 8232:
-        case 8233:
+        case 10: // '\n' line feed
+        case 8232: // line separator
+        case 8233: // paragraph separator
           ++this.state.pos;
           ++this.state.curLine;
           this.state.lineStart = this.state.pos;