CheckBackspace

[kaiyulee]

in readme:

function! CheckBackspace() abort
  let col = col('.') - 1
  return !col || getline('.')[col - 1]  =~# '\s'
endfunction

in :help coc-completion

  function! s:check_back_space() abort
    let col = col('.') - 1
    return !col || getline('.')[col - 1]  =~ '\s'
  endfunction

which one is correct ?

AND

Try to transform it to lua script:

function CheckBackspace()
    local col = vim.fn.col('.') - 1;
    return false == col or vim.fn.getline('.')[col - 1] "=~# 's'";
end

is it right?, don't understand the line return !col || getline('.')[col - 1] =~# '\s'

[kaiyulee]

@chemzqm =~# '\s' or =~ '\s'

[kaiyulee]

Almost get there:

function CheckBackspace()
    local col = vim.fn.col('.') - 1;
    vim.regex();
    return false == col or vim.regex("#'\b'").match_str(vim.fn.getline('.')[col - 1]);
end

[kaiyulee]

The match pattern should be =~ '\s'.

vim.cmd[[
function! CheckBackspace() abort
  let col = col('.') - 1
  return !col || getline('.')[col - 1]  =~ '\s'
endfunction
]]

[chemzqm]

Please read doc :h vim.keymap.set()