From 2787f305f39ff7d7bfd8ecfa9b4b5216a072a7b0 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Sat, 24 Jun 2023 09:13:20 +0530
Subject: [PATCH] Generic helper to concatenate arbitrary numbers of slices

---
 tools/utils/misc.go | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/tools/utils/misc.go b/tools/utils/misc.go
index ec57e95a4..baba9f4ae 100644
--- a/tools/utils/misc.go
+++ b/tools/utils/misc.go
@@ -201,3 +201,16 @@ func Samefile(a, b any) bool {
 
 	return os.SameFile(sta, stb)
 }
+
+func Concat[T any](slices ...[]T) []T {
+	var total int
+	for _, s := range slices {
+		total += len(s)
+	}
+	result := make([]T, total)
+	var i int
+	for _, s := range slices {
+		i += copy(result[i:], s)
+	}
+	return result
+}