This package supports showing type information after you expanded company-mode's completion in nim-mode. (and if the completion was function or template, which "()" will be inserted, but this specification might change when nimsuggest become more smarter)
Add below code to your Emacs configuration file (e.g, ~/.emacs.d/init.el)
(add-to-list 'nim-capf-after-exit-function-hook 'suggestion-box-nim-by-type)
Please read `nim-mode's README.md and install nimsuggest and configure for it. This package depend on the nimsuggest future.