Emacs semantic lines

Question

I tried a solution shown here which did not work for me. Even just disabling decoration mode did not work. So now I am wondering exactly what these lines above my text are, and how I can disable them. Maybe it's not even semantic? I'm not really sure...

Here's my dotfile:

(add-to-list 'load-path "~/.emacs.d/")

(setq package-archives '(("gnu" . "http://elpa.gnu.org/packages/")
                         ("marmalade" . "http://marmalade-repo.org/packages/")
                         ("melpa" . "http://melpa.milkbox.net/packages/")))
(package-initialize)

;; auto-complete stuff
;;(require 'auto-complete)
(require 'auto-complete-config)
(ac-config-default)
(auto-complete-mode 1)

(semantic-mode 1)
(global-ede-mode 1)
(require 'semantic/ia)

;; Semantic
(global-semantic-idle-completions-mode t)
(global-semantic-decoration-mode t)
(global-semantic-highlight-func-mode t)
(global-semantic-show-unmatched-syntax-mode t)


(add-hook 'c-mode-common-hook '(lambda ()

      ;; ac-omni-completion-sources is made buffer local so
      ;; you need to add it to a mode hook to activate on
      ;; whatever buffer you want to use it with.  This
      ;; example uses C mode (as you probably surmised).

      ;; auto-complete.el expects ac-omni-completion-sources to be
      ;; a list of cons cells where each cell's car is a regex
      ;; that describes the syntactical bits you want AutoComplete
      ;; to be aware of. The cdr of each cell is the source that will
      ;; supply the completion data.  The following tells autocomplete
      ;; to begin completion when you type in a . or a ->

      (add-to-list 'ac-omni-completion-sources
                   (cons "\\." '(ac-source-semantic)))
      (add-to-list 'ac-omni-completion-sources
                   (cons "->" '(ac-source-semantic)))

      ;; ac-sources was also made buffer local in new versions of
      ;; autocomplete.  In my case, I want AutoComplete to use
      ;; semantic and yasnippet (order matters, if reversed snippets
      ;; will appear before semantic tag completions).

          (setq ac-sources '(ac-source-semantic ac-source-yasnippet))
  ))
(require 'semantic/scope)
(require 'xcscope)
(require 'semantic/symref)
;(semanticdb-enable-cscope-databases)  ;;This is causing problems

;;C mode
;(require 'cc-mode)

;; ;;Color theme
;; (require 'color-theme)
;; (setq color-theme-is-global t)
;; (add-to-list 'load-path "/home/bob/.emacs.d/theme/ample-theme/ample-theme.el")
;; ;;(require 'ample-theme)
;; (eval-after-load "color-theme"
;;   '(progn
;;      (color-theme-initialize)
;;      (color-theme-jsc-dark)))

;;set font
(set-face-attribute 'default nil :family "Anonymous Pro" :height 140)

;;line numbers
(global-linum-mode 1)
(custom-set-variables '(linum-format (quote "%4d ")))

;;treat .h files at C++
(add-to-list 'auto-mode-alist '("\\.h\\'" . c++-mode))

;; use F5 as compile
(global-set-key [(f5)] 'compile)

;; make compilation window smaller
(setq compilation-window-height 8)

enter image description here

@JustinWood I just tried it in java mode and it happens as well when I call a class method. http://imgur.com/01yeCl7 — foboi1122, Dec 26 '13 at 06:00
@tobol1122 Try to deactivate the `global-semantic-...` functions one by one. My first guess would be to comment out `(global-semantic-show-unmatched-syntax-mode t)` even if the syntax looks right. Looks like the parser drops out of sync and error recovery does not work. But, that is just a guess. Maybe I am wrong. — Tobias, Dec 26 '13 at 21:12
@Tobias thank you for your continued help, I was able to solve this problem — foboi1122, Dec 26 '13 at 22:32

score 0 · Accepted Answer · answered Dec 26 '13 at 23:03

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I was able to solve my problem by disabling one of the overlays. I looked at the properties of one of the lines with underline using C-u C-x = and disabled one of the syntax check overlays. I'm not really sure why the syntax overlay was underlining everything especially since my code compiled fine.

answered Dec 26 '13 at 23:03

foboi1122

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It would be nice if you could give the code for disabling the overlay in your answer. This would also help to estimate how serious the problem is. – Tobias Dec 27 '13 at 07:28
Sorry, I was trying to find the code again but I couldn't remember it because I had figured it out late last night with the help of the good people from emacs IRC. I will try to update this answer again once I figure out what I did. – foboi1122 Dec 27 '13 at 11:14

score 0 · Answer 2 · answered Jun 25 '15 at 21:59

At least when working with C++11/14 code, "semantic-show-unmatched-syntax-mode" shows too many false positive.

Besides that, it sometimes enters a buggy state where warnings are still shown after you fixed the syntax error. It may help to disable and renable the minor mode (M-x semantic-show-unmatched-syntax-mode).

To disable the syntax check globally, change your ~/.emacs:

(global-semantic-show-unmatched-syntax-mode 0)

;;; if you need it, you can use a shortcut to enable/disable it again, e.g.:
(global-set-key [f12] 'semantic-show-unmatched-syntax-mode)

Emacs semantic lines

2 Answers2