Use instead of

lua/cmp/core.lua

@@ -306,12 +306,12 @@ core.confirm = function(self, e, option, callback)
 
   -- Simulate `<C-y>` behavior.
   local confirm = {}
-  table.insert(confirm, keymap.t(string.rep('<C-h>', ctx.cursor.character - misc.to_utfindex(e.context.cursor_before_line, e:get_offset()))))
+  table.insert(confirm, keymap.backspace(ctx.cursor.character - misc.to_utfindex(e.context.cursor_before_line, e:get_offset())))
   table.insert(confirm, e:get_word())
   keymap.feedkeys(table.concat(confirm, ''), 'nt', function()
     -- Restore to the requested state.
     local restore = {}
-    table.insert(restore, keymap.t(string.rep('<C-h>', vim.fn.strchars(e:get_word()))))
+    table.insert(restore, keymap.backspace(vim.str_utfindex(e:get_word())))
     table.insert(restore, string.sub(e.context.cursor_before_line, e:get_offset()))
     keymap.feedkeys(table.concat(restore, ''), 'n', function()
       --@see https://github.com/microsoft/vscode/blob/main/src/vs/editor/contrib/suggest/suggestController.ts#L334
@@ -363,13 +363,13 @@ core.confirm = function(self, e, option, callback)
         table.insert(keys, keymap.t(string.rep('<Del>', completion_item.textEdit.range['end'].character - e.context.cursor.character)))
       end
       if completion_item.textEdit.range.start.character < e.context.cursor.character then
-        table.insert(keys, keymap.t(string.rep('<C-h>', e.context.cursor.character - completion_item.textEdit.range.start.character)))
+        table.insert(keys, keymap.backspace(e.context.cursor.character - completion_item.textEdit.range.start.character))
       end
 
       local is_snippet = completion_item.insertTextFormat == types.lsp.InsertTextFormat.Snippet
       if is_snippet then
         table.insert(keys, keymap.t('<C-g>u') .. e:get_word() .. keymap.t('<C-g>u'))
-        table.insert(keys, keymap.t(string.rep('<C-h>', vim.fn.strchars(e:get_word()))))
+        table.insert(keys, keymap.backspace(vim.str_utfindex(e:get_word())))
       else
         table.insert(keys, keymap.t('<C-g>u') .. completion_item.textEdit.newText .. keymap.t('<C-g>u'))
       end

lua/cmp/entry.lua

@@ -345,7 +345,7 @@ end
 ---@return { score: number, matches: table[] }
 entry.match = function(self, input)
   return self.match_cache:ensure(input, function()
-    local score, matches
+    local score, matches, _
     score, matches = matcher.match(input, self:get_filter_text(), { self:get_word() })
     if self:get_filter_text() ~= self:get_completion_item().label then
       _, matches = matcher.match(input, self:get_completion_item().label)

lua/cmp/source.lua

@@ -1,6 +1,5 @@
 local context = require('cmp.context')
 local config = require('cmp.config')
-local matcher = require('cmp.matcher')
 local entry = require('cmp.entry')
 local debug = require('cmp.utils.debug')
 local misc = require('cmp.utils.misc')

lua/cmp/utils/keymap.lua

@@ -72,6 +72,20 @@ keymap.to_keymap = function(s)
   end)
 end
 
+---Create backspace keys.
+---@param count number
+---@return string
+keymap.backspace = function(count)
+  if count <= 0 then
+    return ''
+  end
+  local keys = {}
+  table.insert(keys, keymap.t('<C-g>U'))
+  table.insert(keys, keymap.t(string.rep('<Left>', count)))
+  table.insert(keys, keymap.t(string.rep('<Del>', count)))
+  return table.concat(keys, '')
+end
+
 ---Return two key sequence are equal or not.
 ---@param a string
 ---@param b string

lua/cmp/view/custom_entries_view.lua

@@ -296,7 +296,7 @@ end
 misc.set(_G, { 'cmp', 'view', 'custom_entries_view', '_insert', 'remove' }, function(offset)
   local cursor = vim.api.nvim_win_get_cursor(0)
   local length = vim.str_utfindex(string.sub(vim.api.nvim_get_current_line(), offset, cursor[2]))
-  return keymap.t(string.rep('<C-h>', length))
+  return keymap.backspace(length)
 end)
 
 return custom_entries_view