company-mode.el

(use-package company
  :ensure t

  :hook
  ((prog-mode . global-company-mode)
   (text-mode . global-company-mode))

  :bind
  (:map company-active-map
    ("TAB" . company-select-next)
    ("<tab>" . company-select-next)
    ("RET" . (lambda ()
           (interactive)
           (if (company-explicit-action-p)
               (company-complete)
             (newline-and-indent))))
    ("<return>" . (lambda ()
            (interactive)
            (if (company-explicit-action-p)
                (company-complete)
              (newline-and-indent)))))

  :init
  (setq company-selection-default nil)

  :custom
  (company-minimum-prefix-length 1)
  (company-idle-delay 0.0)
  (company-insertion-triggers nil)
  (company-format-margin-function #'company-vscode-dark-icons-margin)
  (company-frontends
    '(company-pseudo-tooltip-frontend
      company-echo-metadata-frontend))
  (company-backends
   '((company-bbdb :with company-yasnippet)
         (company-semantic :with company-yasnippet)
         (company-cmake :with company-yasnippet)
         (company-capf :with company-yasnippet )
         (company-clang :with company-yasnippet)
         (company-files :with company-yasnippet)
         (company-dabbrev-code :with company-yasnippet)
     (company-gtags :with company-yasnippet)
     (company-etags :with company-yasnippet)
     (company-keywords :with company-yasnippet)
         (company-dabbrev :with company-yasnippet)))

  :config
  (require 'yasnippet)
  (yas-global-mode 1))