From a6b7267979942348f19e4b3fe9d25d596da5f5a0 Mon Sep 17 00:00:00 2001
From: Christian <cb@256bit.org>
Date: Wed, 18 Nov 2020 09:13:32 +0100
Subject: [PATCH] highlighter: vim9 script implementation of s:hl_group_exists

---
 autoload/airline/highlighter.vim | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/autoload/airline/highlighter.vim b/autoload/airline/highlighter.vim
index f845d7db..0c80dada 100644
--- a/autoload/airline/highlighter.vim
+++ b/autoload/airline/highlighter.vim
@@ -394,4 +394,12 @@ else
     var rest = [ rest1, rest2, rest3 ]
     return s:get_array(guifg, guibg, ctermfg, ctermbg, filter(rest, {_, v -> !empty(v)}))
   enddef
+  def s:hl_group_exists(group: string): bool # {{{2
+    if !hlexists(group)
+      return false
+    elseif hlID(group)->synIDtrans()->synIDattr('fg')->empty()
+      return false
+    endif
+    return true
+  enddef
 endif