nvim-autopairs-closer.lua

-- vim-closer replacement

-- https://github.com/rstacruz/vim-closer/blob/master/autoload/closer.vim
local get_closing_for_line = function (line)
  local i = -1
  local clo = ''

  while true do
    i, _= string.find(line, "[%(%)%{%}%[%]]", i + 1)
    if i == nil then break end
    local ch = string.sub(line, i, i)
    local st = string.sub(clo, 1, 1)

    if ch == '{' then
      clo = '}' .. clo
    elseif ch == '}' then
      if st ~= '}' then return '' end
      clo = string.sub(clo, 2)
    elseif ch == '(' then
      clo = ')' .. clo
    elseif ch == ')' then
      if st ~= ')' then return '' end
      clo = string.sub(clo, 2)
    elseif ch == '[' then
      clo = ']' .. clo
    elseif ch == ']' then
      if st ~= ']' then return '' end
      clo = string.sub(clo, 2)
    end
  end

  return clo
end

autopairs.clear_rules()

autopairs.add_rule(
  Rule("[%(%{%[]", "")
  :use_regex(true)
  :replace_endpair(function(opts)
    return get_closing_for_line(opts.line)
  end)
  :end_wise()
)