From 9ae49d71c84b42b91795f7b7cead223c6346e774 Mon Sep 17 00:00:00 2001
From: Chris Taylor <cttttt@users.noreply.github.com>
Date: Sun, 19 May 2024 06:33:15 -0400
Subject: [PATCH] fix: reimplement the deprecated function
 tbl_add_reverse_lookup (#904)

---
 lua/bufferline/diagnostics.lua |  3 ++-
 lua/bufferline/utils/init.lua  | 16 ++++++++++++++++
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/lua/bufferline/diagnostics.lua b/lua/bufferline/diagnostics.lua
index a1db846e..ac7218bb 100644
--- a/lua/bufferline/diagnostics.lua
+++ b/lua/bufferline/diagnostics.lua
@@ -1,13 +1,14 @@
 local lazy = require("bufferline.lazy")
 local config = lazy.require("bufferline.config") ---@module "bufferline.config"
 local ui = lazy.require("bufferline.ui") ---@module "bufferline.ui"
+local utils = lazy.require("bufferline.utils") ---@module "bufferline.utils"
 
 local M = {}
 
 local fn = vim.fn
 local fmt = string.format
 
-local severity_name = vim.tbl_add_reverse_lookup({
+local severity_name = utils.tbl_add_reverse_lookup({
   [1] = "error",
   [2] = "warning",
   [3] = "info",
diff --git a/lua/bufferline/utils/init.lua b/lua/bufferline/utils/init.lua
index fe19eeb6..a87b7207 100644
--- a/lua/bufferline/utils/init.lua
+++ b/lua/bufferline/utils/init.lua
@@ -121,6 +121,22 @@ function M.tbl_reverse_lookup(tbl)
   return ret
 end
 
+--- creates a table containing the forward and reversed mapping from the provided
+--- table.
+--- similar to the now deprecated vim.tbl_add_reverse_lookup
+--- @generic K,V
+--- @param tbl table<K,V>
+--- @return table<V,K>
+function M.tbl_add_reverse_lookup(tbl)
+  local ret = {}
+  for k, v in pairs(tbl) do
+    ret[k] = v
+    ret[v] = k
+  end
+
+  return ret
+end
+
 M.path_sep = vim.fn.has("win32") == 1 and "\\" or "/"
 
 -- The provided api nvim_is_buf_loaded filters out all hidden buffers