-;;; company-clang.el --- a company-mode completion back-end for clang
-;;
-;; Copyright (C) 2010 Nikolaj Schumacher
-;;
-;; This file is part of company 0.4.3.
-;;
-;; This program is free software; you can redistribute it and/or
-;; modify it under the terms of the GNU General Public License
-;; as published by the Free Software Foundation; either version 2
-;; of the License, or (at your option) any later version.
-;;
-;; This program is distributed in the hope that it will be useful,
+;;; company-clang.el --- A company-mode completion back-end for clang
+
+;; Copyright (C) 2009, 2011, 2013 Free Software Foundation, Inc.
+
+;; Author: Nikolaj Schumacher
+
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs is free software: you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
-;;
+
;; You should have received a copy of the GNU General Public License
-;; along with this program. If not, see <http://www.gnu.org/licenses/>.
+;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
+
+
+;;; Commentary:
+;;
+
+;;; Code:
(require 'company)
(eval-when-compile (require 'cl))
(defcustom company-clang-executable
(executable-find "clang")
- "*Location of clang executable"
+ "Location of clang executable."
:group 'company-clang
:type 'file)
(defcustom company-clang-auto-save t
- "*Determines whether to save the buffer when retrieving completions.
+ "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)))
(defcustom company-clang-arguments nil
- "*Additional arguments to pass to clang when completing.
+ "Additional arguments to pass to clang when completing.
Prefix files (-include ...) can be selected with
`company-clang-set-prefix' or automatically through a custom
`company-clang-prefix-guesser'."
: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."
+ "A function to determine the prefix file for the current buffer."
:group 'company-clang
:type '(function :tag "Guesser function" nil))
;; Prefixes seem to be called .pch. Pre-compiled headers do, too.
;; So we look at the magic number to rule them out.
(let* ((file (company-clang--guess-pch-file buffer-file-name))
- (magic-number (company-clang--file-substring file 0 4)))
+ (magic-number (and file (company-clang--file-substring file 0 4))))
(unless (member magic-number '("CPCH" "gpch"))
file)))
;; TODO: How to handle OVERLOAD and Pattern?
(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)
(goto-char (point-min))
(let ((pattern (format company-clang--completion-pattern
(regexp-quote prefix)))
+ (case-fold-search nil)
lines match)
+ (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")
(push match lines)))
lines))
(1+ (current-column)))))
(defsubst company-clang--build-complete-args (pos)
- (append '("-cc1" "-fsyntax-only")
+ (append '("-cc1" "-fsyntax-only" "-code-completion-macros")
company-clang-arguments
(when (stringp company-clang--prefix)
(list "-include" (expand-file-name company-clang--prefix)))
(defun company-clang--candidates (prefix)
(and company-clang-auto-save
(buffer-modified-p)
- (save-buffer))
+ (basic-save-buffer))
(when (null company-clang--prefix)
(company-clang-set-prefix (or (funcall company-clang-prefix-guesser)
'none)))
prefix
(company-clang--build-complete-args (- (point) (length prefix)))))
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+(defconst company-clang-required-version 1.1)
+
+(defsubst company-clang-version ()
+ "Return the version of `company-clang-executable'."
+ (with-temp-buffer
+ (call-process company-clang-executable nil t nil "--version")
+ (goto-char (point-min))
+ (if (re-search-forward "clang\\(?: version \\|-\\)\\([0-9.]+\\)" nil t)
+ (let ((ver (string-to-number (match-string-no-properties 1))))
+ (if (> ver 100)
+ (/ ver 100)
+ ver))
+ 0)))
+
+(defun company-clang-objc-templatify (selector)
+ (let* ((end (point))
+ (beg (- (point) (length selector)))
+ (templ (company-template-declare-template beg end)))
+ (save-excursion
+ (goto-char beg)
+ (while (search-forward ":" end t)
+ (replace-match ": ")
+ (incf end 2)
+ (company-template-add-field templ (1- (match-end 0)) "<arg>"))
+ (delete-char -1))
+ (company-template-move-to-first templ)))
+
(defun company-clang (command &optional arg &rest ignored)
"A `company-mode' completion back-end for clang.
-Clang is a parser for C and ObjC. The unreleased development version of
-clang (1.1) is required.
+Clang is a parser for C and ObjC. Clang version 1.1 or newer is required.
Additional command line arguments can be specified in
`company-clang-arguments'. Prefix files (-include ...) can be selected
`company-clang-auto-save' determines whether to do this automatically."
(interactive (list 'interactive))
(case command
- ('interactive (company-begin-backend 'company-clang))
- ('prefix (and (memq major-mode company-clang-modes)
- buffer-file-name
- company-clang-executable
- (not (company-in-string-or-comment))
- (or (company-grab-symbol) 'stop)))
- ('candidates (company-clang--candidates arg))))
+ (interactive (company-begin-backend 'company-clang))
+ (init (unless company-clang-executable
+ (error "Company found no clang executable"))
+ (when (< (company-clang-version) company-clang-required-version)
+ (error "Company requires clang version 1.1")))
+ (prefix (and (memq major-mode company-clang-modes)
+ buffer-file-name
+ company-clang-executable
+ (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)))))
(provide 'company-clang)
;;; company-clang.el ends here