From 638abda97cf458d9243804b75de53714209e8632 Mon Sep 17 00:00:00 2001
From: Marijn Haverbeke <marijn@haverbeke.berlin>
Date: Fri, 1 Sep 2023 08:56:11 +0200
Subject: [PATCH] [go mode] Allow underscore separators in numbers

Closes https://github.com/codemirror/codemirror5/issues/7059
---
 mode/go/go.js | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/mode/go/go.js b/mode/go/go.js
index 8dbdc65d1c..bd54f1ab03 100644
--- a/mode/go/go.js
+++ b/mode/go/go.js
@@ -46,11 +46,11 @@ CodeMirror.defineMode("go", function(config) {
     }
     if (/[\d\.]/.test(ch)) {
       if (ch == ".") {
-        stream.match(/^[0-9]+([eE][\-+]?[0-9]+)?/);
+        stream.match(/^[0-9_]+([eE][\-+]?[0-9_]+)?/);
       } else if (ch == "0") {
-        stream.match(/^[xX][0-9a-fA-F]+/) || stream.match(/^0[0-7]+/);
+        stream.match(/^[xX][0-9a-fA-F_]+/) || stream.match(/^[0-7_]+/);
       } else {
-        stream.match(/^[0-9]*\.?[0-9]*([eE][\-+]?[0-9]+)?/);
+        stream.match(/^[0-9_]*\.?[0-9_]*([eE][\-+]?[0-9_]+)?/);
       }
       return "number";
     }