From e165276763f52bc1f8a30d892651b1725aef7017 Mon Sep 17 00:00:00 2001
From: jdhao <jdhao@hotmail.com>
Date: Mon, 5 Aug 2024 00:22:29 +0200
Subject: [PATCH] fix error when there is no cursor word

---
 lua/config/hlslens.lua | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/lua/config/hlslens.lua b/lua/config/hlslens.lua
index 430bd23..3632347 100644
--- a/lua/config/hlslens.lua
+++ b/lua/config/hlslens.lua
@@ -35,14 +35,28 @@ keymap.set("n", "N", "", {
   end,
 })
 
+local no_word_under_cursor = function()
+  local word_under_cursor = vim.fn.expand("<cword>")
+
+  local msg = "E348: No string under cursor"
+  api.nvim_err_writeln(msg)
+  return word_under_cursor == ""
+end
+
 keymap.set("n", "*", "", {
   callback = function()
+    if no_word_under_cursor() then
+      return
+    end
     vim.fn.execute("normal! *N")
     hlslens.start()
   end,
 })
 keymap.set("n", "#", "", {
   callback = function()
+    if no_word_under_cursor() then
+      return
+    end
     vim.fn.execute("normal! #N")
     hlslens.start()
   end,