-;;; company-clang.el --- A company-mode completion back-end for clang
+;;; company-clang.el --- company-mode completion back-end for Clang
;; Copyright (C) 2009, 2011, 2013 Free Software Foundation, Inc.
;;; Code:
(require 'company)
+(require 'company-template)
(eval-when-compile (require 'cl))
+(defgroup company-clang nil
+ "Completion back-end for Clang."
+ :group 'company)
+
(defcustom company-clang-executable
(executable-find "clang")
"Location of clang executable."
- :group 'company-clang
:type 'file)
(defcustom company-clang-auto-save t
"Determines whether to save the buffer when retrieving completions.
clang can only complete correctly when the buffer has been saved."
- :group 'company-clang
:type '(choice (const :tag "Off" nil)
(const :tag "On" t)))
Prefix files (-include ...) can be selected with
`company-clang-set-prefix' or automatically through a custom
`company-clang-prefix-guesser'."
- :group 'company-clang
:type '(repeat (string :tag "Argument" nil)))
(defcustom company-clang-prefix-guesser 'company-clang-guess-prefix
"A function to determine the prefix file for the current buffer."
- :group 'company-clang
:type '(function :tag "Guesser function" nil))
-(defvar company-clang-modes '(c-mode objc-mode)
+(defvar company-clang-modes '(c-mode c++-mode objc-mode)
"Major modes which clang may complete.")
;; prefix ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; parsing ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-;; TODO: How to handle OVERLOAD and Pattern?
+;; TODO: Handle Pattern (syntactic hints would be neat).
+;; Do we ever see OVERLOAD (or OVERRIDE)?
(defconst company-clang--completion-pattern
- "^COMPLETION: \\_<\\(%s[a-zA-Z0-9_:]*\\)\\(?: : \\(.*\\)$\\)?")
+ "^COMPLETION: \\_<\\(%s[a-zA-Z0-9_:]*\\)\\(?: : \\(.*\\)$\\)?$")
(defconst company-clang--error-buffer-name "*clang error*")
(defvar company-clang--meta-cache nil)
-(defun company-clang--parse-output (prefix)
+(defun company-clang--parse-output (prefix objc)
(goto-char (point-min))
(let ((pattern (format company-clang--completion-pattern
(regexp-quote prefix)))
(setq company-clang--meta-cache (make-hash-table :test 'equal))
(while (re-search-forward pattern nil t)
(setq match (match-string-no-properties 1))
- (let ((meta (match-string-no-properties 2)))
- (when (and meta (not (string= match meta)))
- (puthash match meta company-clang--meta-cache)))
(unless (equal match "Pattern")
+ (let ((meta (match-string-no-properties 2)))
+ (when (and meta (not (string= match meta)))
+ (setq meta (company-clang--strip-formatting meta))
+ (when (and (not objc) (string-match "\\((.*)\\)" meta))
+ (setq match (concat match (match-string 1 meta))))
+ (puthash match meta company-clang--meta-cache)))
(push match lines)))
lines))
+(defun company-clang--strip-formatting (text)
+ (replace-regexp-in-string
+ "#]" " "
+ (replace-regexp-in-string "[<{[]#\\|#[>}]" "" text t)
+ t))
+
(defun company-clang--handle-error (res args)
(goto-char (point-min))
(let* ((buf (get-buffer-create company-clang--error-buffer-name))
(goto-char (point-min))))))
(defun company-clang--call-process (prefix &rest args)
- (with-temp-buffer
- (let ((res (apply 'call-process company-clang-executable nil t nil args)))
- (unless (eq 0 res)
- (company-clang--handle-error res args))
- ;; Still try to get any useful input.
- (company-clang--parse-output prefix))))
+ (let ((objc (derived-mode-p 'objc-mode)))
+ (with-temp-buffer
+ (let ((res (apply 'call-process company-clang-executable nil t nil args)))
+ (unless (eq 0 res)
+ (company-clang--handle-error res args))
+ ;; Still try to get any useful input.
+ (company-clang--parse-output prefix objc)))))
(defsubst company-clang--build-location (pos)
(save-excursion
(defun company-clang-objc-templatify (selector)
(let* ((end (point))
(beg (- (point) (length selector)))
- (templ (company-template-declare-template beg end)))
+ (templ (company-template-declare-template beg end))
+ (cnt 0))
(save-excursion
(goto-char beg)
(while (search-forward ":" end t)
- (replace-match ": ")
- (incf end)
- (company-template-add-field templ (1- (match-end 0)) "<arg>"))
- (delete-char -1))
+ (let* ((name (format "arg%d" cnt))
+ (len (length name)))
+ (incf end len)
+ (let ((pt (point)))
+ (insert name)
+ (company-template-add-field templ pt (point)))
+ (when (< (point) end)
+ (insert " ")
+ (incf end))
+ (incf cnt))))
(company-template-move-to-first templ)))
(defun company-clang (command &optional arg &rest ignored)
- "A `company-mode' completion back-end for clang.
+ "`company-mode' completion back-end for Clang.
Clang is a parser for C and ObjC. Clang version 1.1 or newer is required.
Additional command line arguments can be specified in
(not (company-in-string-or-comment))
(or (company-grab-symbol) 'stop)))
(candidates (company-clang--candidates arg))
- (meta (let ((meta (gethash arg company-clang--meta-cache)))
- (when meta
- (replace-regexp-in-string
- "#]" " "
- (replace-regexp-in-string "[<{[]#\\|#[>}]" "" meta t)
- t))))
- (post-completion (and (derived-mode-p 'objc-mode)
- (string-match ":" arg)
- (company-clang-objc-templatify arg)))))
+ (meta (gethash arg company-clang--meta-cache))
+ (crop (and (string-match ":\\|(" arg)
+ (substring arg 0 (match-beginning 0))))
+ (post-completion (cond
+ ((not (derived-mode-p 'objc-mode))
+ (company-template-c-like-templatify arg))
+ ((string-match ":" arg)
+ (company-clang-objc-templatify arg))))))
(provide 'company-clang)
;;; company-clang.el ends here