ada.el

早期freebsd实现

; Ada editing support package in GNUlisp.  v1.0
; Author: Vincent Broman <[e-mail]>  May 1987.
; (borrows heavily from Mick Jordan's Modula-2 package for GNU,
; as modified by Peter Robinson, Michael Schmidt, and Tom Perrine.)


(setq auto-mode-alist (cons (cons "\\.ada$" 'ada-mode) auto-mode-alist))

(defvar ada-mode-syntax-table nil
  "Syntax table in use in Ada-mode buffers.")

(let ((table (make-syntax-table)))
  (modify-syntax-entry ?_ "_" table)
  (modify-syntax-entry ?\# "_" table)
  (modify-syntax-entry ?\( "()" table)
  (modify-syntax-entry ?\) ")(" table)
  (modify-syntax-entry ?$ "." table)
  (modify-syntax-entry ?* "." table)
  (modify-syntax-entry ?/ "." table)
  (modify-syntax-entry ?+ "." table)
  (modify-syntax-entry ?- "." table)
  (modify-syntax-entry ?= "." table)
  (modify-syntax-entry ?\& "." table)
  (modify-syntax-entry ?\| "." table)
  (modify-syntax-entry ?< "." table)
  (modify-syntax-entry ?> "." table)
  (modify-syntax-entry ?\[ "." table)
  (modify-syntax-entry ?\] "." table)
  (modify-syntax-entry ?\{ "." table)
  (modify-syntax-entry ?\} "." table)
  (modify-syntax-entry ?. "." table)
  (modify-syntax-entry ?\\ "." table)
  (modify-syntax-entry ?: "." table)
  (modify-syntax-entry ?\; "." table)
  (modify-syntax-entry ?\' "." table)
  (modify-syntax-entry ?\" "\"" table)
  (setq ada-mode-syntax-table table))

(defvar ada-mode-map nil
  "Keymap used in Ada mode.")

(let ((map (make-sparse-keymap)))
  (define-key map "\C-m" 'ada-newline)
  (define-key map "\C-?" 'backward-delete-char-untabify)
  (define-key map "\C-i" 'ada-tab)
  (define-key map "\C-c\C-i" 'ada-untab)
  (define-key map "\C-c<" 'ada-backward-to-same-indent)
  (define-key map "\C-c>" 'ada-forward-to-same-indent)
  (define-key map "\C-ch" 'ada-header)
  (define-key map "\C-c(" 'ada-paired-parens)
  (define-key map "\C-c-" 'ada-inline-comment)
  (define-key map "\C-c\C-a" 'ada-array)
  (define-key map "\C-cb" 'ada-exception-block)
  (define-key map "\C-cd" 'ada-declare-block)
  (define-key map "\C-c\C-e" 'ada-exception)
  (define-key map "\C-cc" 'ada-case)
  (define-key map "\C-c\C-k" 'ada-package-spec)
  (define-key map "\C-ck" 'ada-package-body)
  (define-key map "\C-c\C-p" 'ada-procedure-spec)
  (define-key map "\C-cp" 'ada-subprogram-body)
  (define-key map "\C-c\C-f" 'ada-function-spec)
  (define-key map "\C-cf" 'ada-for-loop)
  (define-key map "\C-cl" 'ada-loop)
  (define-key map "\C-ci" 'ada-if)
  (define-key map "\C-cI" 'ada-elsif)
  (define-key map "\C-ce" 'ada-else)
  (define-key map "\C-c\C-v" 'ada-private)
  (define-key map "\C-c\C-r" 'ada-record)
  (define-key map "\C-c\C-s" 'ada-subtype)
  (define-key map "\C-cs" 'ada-separate)
  (define-key map "\C-c\C-t" 'ada-type)
  (define-key map "\C-ct" 'ada-tabsize)
;;    (define-key map "\C-c\C-u" 'ada-use)
;;    (define-key map "\C-c\C-w" 'ada-with)
  (define-key map "\C-cw" 'ada-while-loop)
  (define-key map "\C-c\C-w" 'ada-when)
  (define-key map "\C-cx" 'ada-exit)
  (define-key map "\C-cC" 'ada-compile)
  (define-key map "\C-cB" 'ada-bind)
  (define-key map "\C-cE" 'ada-find-listing)
  (define-key map "\C-cL" 'ada-library-name)
  (define-key map "\C-cO" 'ada-options-for-bind)
  (setq ada-mode-map map))

(defvar ada-indent 4 "*Value is the number of columns to indent in Ada-Mode.")
  
(defun ada-mode ()
"This is a mode intended to support program development in Ada.
Most control constructs and declarations of Ada can be inserted in the buffer
by typing Control-C followed by a character mnemonic for the construct.

C-c C-a  array         	C-c b    exception block
C-c C-e  exception      C-c d    declare block
C-c C-k  package spec   C-c k    package body
C-c C-p  procedure spec C-c p    proc/func body
C-c C-f  func spec      C-c f    for loop
                        C-c i    if
                        C-c I    elsif
                        C-c e    else
C-c C-v  private        C-c l    loop
C-c C-r  record         C-c c    case
C-c C-s  subtype        C-c s    separate
C-c C-t  type           C-c t    tab spacing for indents
C-c C-w  when           C-c w    while
                        C-c x    exit
C-c (    paired parens  C-c -    inline comment
                        C-c h    header sec
C-c C    compile        C-c B    bind
C-c E    find error list
C-c L    name library   C-c O    options for bind

C-c < and C-c > move backward and forward respectively to the next line
having the same (or lesser) level of indentation.

Variable ada-indent controls the number of spaces for indent/undent.

\\{ada-mode-map}
"
  (interactive)
  (kill-all-local-variables)
  (use-local-map ada-mode-map)
  (setq major-mode 'ada-mode)
  (setq mode-name "Ada")
  (make-local-variable 'comment-column)
  (setq comment-column 41)
  (make-local-variable 'end-comment-column)
  (setq end-comment-column 72)
  (set-syntax-table ada-mode-syntax-table)
  (make-local-variable 'paragraph-start)
  (setq paragraph-start (concat "^$\\|" page-delimiter))
  (make-local-variable 'paragraph-separate)
  (setq paragraph-separate paragraph-start)
  (make-local-variable 'paragraph-ignore-fill-prefix)
  (setq paragraph-ignore-fill-prefix t)
;  (make-local-variable 'indent-line-function)
;  (setq indent-line-function 'c-indent-line)
  (make-local-variable 'require-final-newline)
  (setq require-final-newline t)
  (make-local-variable 'comment-start)
  (setq comment-start "--")
  (make-local-variable 'comment-end)
  (setq comment-end "\n")
  (make-local-variable 'comment-column)
  (setq comment-column 41)
  (make-local-variable 'comment-start-skip)
  (setq comment-start-skip "--+ *")
  (make-local-variable 'comment-indent-hook)
  (setq comment-indent-hook 'c-comment-indent)
  (make-local-variable 'parse-sexp-ignore-comments)
  (setq parse-sexp-ignore-comments t)
  (run-hooks 'ada-mode-hook))

(defun ada-tabsize (s)
  "changes spacing used for indentation. Reads spacing from minibuffer."
  (interactive "nnew indentation spacing: ")
  (setq ada-indent s))

(defun ada-newline ()
  "Start new line and indent to current tab stop."
  (interactive)
  (let ((ada-cc (current-indentation)))
    (newline)
    (indent-to ada-cc)))

(defun ada-tab ()
  "Indent to next tab stop."
  (interactive)
  (indent-to (* (1+ (/ (current-indentation) ada-indent)) ada-indent)))

(defun ada-untab ()
  "Delete backwards to previous tab stop."
  (interactive)
  (backward-delete-char-untabify ada-indent nil))

(defun ada-go-to-this-indent (step indent-level)
  "Move point repeatedly by <step> lines till the current line
has given indent-level or less, or the start/end of the buffer is hit.
Ignore blank lines, statement labels, block/loop names."
  (while (and
	  (zerop (forward-line step))
	  (or (looking-at "^[ 	]*$")
	      (looking-at "^[ 	]*--")
	      (looking-at "^<<[A-Za-z0-9_]+>>")
	      (looking-at "^[A-Za-z0-9_]+:")
	      (> (current-indentation) indent-level)))
    nil))

(defun ada-backward-to-same-indent ()
  "Move point backwards to nearest line with same indentation or less.
If not found, point is left at top of buffer."
  (interactive)
  (ada-go-to-this-indent -1 (current-indentation))
  (back-to-indentation))

(defun ada-forward-to-same-indent ()
  "Move point forwards to nearest line with same indentation or less.
If not found, point is left at start of last line in buffer."
  (interactive)
  (ada-go-to-this-indent 1 (current-indentation))
  (back-to-indentation))

(defun ada-array ()
  "Insert array type definition, prompting for component type,
leaving the user to type in the index subtypes."
  (interactive)
  (insert "array ()")
  (backward-char)
  (insert (read-string "index subtype[s]: "))
  (end-of-line)
  (insert " of ;")
  (backward-char)
  (insert (read-string "component-type: "))
  (end-of-line))

(defun ada-case ()
  "Build skeleton case statment, prompting for the selector expression.
starts up the first when clause, too."
  (interactive)
  (insert "case ")
  (insert (read-string "selector expression: ") " is")
  (ada-newline)
  (ada-newline)
  (insert "end case;")
  (end-of-line 0)
  (ada-tab)
  (ada-tab)
  (ada-when))

(defun ada-declare-block ()
  "Insert a block with a declare part and indent for the 1st declaration."
  (interactive)
  (let ((ada-block-name (read-string "[block name]: ")))
    (insert "declare")
    (cond
      ( (not (string-equal ada-block-name ""))
	(beginning-of-line)
	(open-line 1)
	(insert ada-block-name ":")
	(next-line 1)
	(end-of-line)))
    (ada-newline)
    (ada-newline)
    (insert "begin")
    (ada-newline)
    (ada-newline)
    (if (string-equal ada-block-name "")
      (insert "end;")
      (insert "end " ada-block-name ";"))
   )
  (end-of-line -2)
  (ada-tab))

(defun ada-exception-block ()
  "Insert a block with an exception part and indent for the 1st line of code."
  (interactive)
  (let ((block-name (read-string "[block name]: ")))
    (insert "begin")
    (cond
      ( (not (string-equal block-name ""))
	(beginning-of-line)
	(open-line 1)
	(insert block-name ":")
	(next-line 1)
	(end-of-line)))
    (ada-newline)
    (ada-newline)
    (insert "exception")
    (ada-newline)
    (ada-newline)
    (cond
      ( (string-equal block-name "")
	(insert "end;"))
      ( t
	(insert "end " block-name ";")))
   )
  (end-of-line -2)
  (ada-tab))

(defun ada-exception ()
  "Undent and insert an exception part into a block. Reindent."
  (interactive)
  (ada-untab)
  (insert "exception")
  (ada-newline)
  (ada-tab))

(defun ada-else ()
  "Add an else clause inside an if-then-end-if clause."
  (interactive)
  (ada-untab)
  (insert "else")
  (ada-newline)
  (ada-tab))

(defun ada-exit ()
  "Insert an exit statement, prompting for loop name and condition."
  (interactive)
  (insert "exit")
  (let ((ada-loop-name (read-string "[name of loop to exit]: ")))
    (if (not (string-equal ada-loop-name "")) (insert " " ada-loop-name)))
  (let ((ada-exit-condition (read-string "[exit condition]: ")))
    (if (not (string-equal ada-exit-condition ""))
	(if (string-match "^ *[Ww][Hh][Ee][Nn] +" ada-exit-condition)
	    (insert " " ada-exit-condition)
	  (insert " when " ada-exit-condition))))
  (insert ";"))

(defun ada-when ()
  "Start a case statement alternative with a when clause."