config.nvim/lua/plugins/nvim-autopairs.lua

local remap = vim.api.nvim_set_keymap
local npairs = require('nvim-autopairs')

npairs.setup({map_bs = false})

-- these mappings are coq recommended mappings unrelated to nvim-autopairs
remap('i', '<esc>', [[pumvisible() ? "<c-e><esc>" : "<esc>"]],
      {expr = true, noremap = true})
remap('i', '<c-c>', [[pumvisible() ? "<c-e><c-c>" : "<c-c>"]],
      {expr = true, noremap = true})
remap('i', '<tab>', [[pumvisible() ? "<c-n>" : "<tab>"]],
      {expr = true, noremap = true})
remap('i', '<s-tab>', [[pumvisible() ? "<c-p>" : "<bs>"]],
      {expr = true, noremap = true})

-- skip it, if you use another global object
_G.MUtils = {}

MUtils.CR = function()
    if vim.fn.pumvisible() ~= 0 then
        if vim.fn.complete_info({'selected'}).selected ~= -1 then
            return npairs.esc('<c-y>')
        else
            return npairs.esc('<c-e>') .. npairs.autopairs_cr()
        end
    else
        return npairs.autopairs_cr()
    end
end
remap('i', '<cr>', 'v:lua.MUtils.CR()', {expr = true, noremap = true})

MUtils.BS = function()
    if vim.fn.pumvisible() ~= 0 and vim.fn.complete_info({'mode'}).mode ==
        'eval' then
        return npairs.esc('<c-e>') .. npairs.autopairs_bs()
    else
        return npairs.autopairs_bs()
    end
end
remap('i', '<bs>', 'v:lua.MUtils.BS()', {expr = true, noremap = true})