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(defun go-mode-create-imenu-index ()
"Create and return an imenu index alist. Unlike the default
alist created by go-mode, this method creates an alist where
items follow a style that is consistent with other prog-modes."
(let* ((patterns '(("type" "^type *\\([^ \t\n\r\f]*\\)" 1)))
(type-index (imenu--generic-function patterns))
(func-index))
(save-excursion
(goto-char (point-min))
(while (re-search-forward go-func-meth-regexp (point-max) t)
(let* ((var (match-string-no-properties 1))
(func (match-string-no-properties 2))
(name (if var
(concat (substring var 0 -1) "." func)
func))
(beg (match-beginning 0))
(marker (copy-marker beg))
(item (cons name marker)))
(setq func-index (cons item func-index)))))
(nconc type-index (list (cons "func" func-index)))))
(defun go-mode-create-flat-imenu-index ()
"Return a flat imenu index alist. See `go-mode-create-imenu-index'."
(apply 'nconc (mapcar 'cdr (go-mode-create-imenu-index))))
(defun go-mode-buffer-local-variables ()
;; adjust fill-column
(setq-local fill-column 120)
;; use flat imenu index
(setq-local imenu-create-index-function
#'go-mode-create-flat-imenu-index))
(use-package go-mode
:hook (go-mode . go-mode-buffer-local-variables))
(provide 'init-go)
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