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Re: vera-mode.el


From: Reto Zimmermann
Subject: Re: vera-mode.el
Date: Mon, 11 Jun 2007 12:52:15 +0200
User-agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.2) Gecko/20040804 Netscape/7.2 (ax)

Dan Nicolaescu wrote:

  > > Faces don't have "-face" suffix anymore now, some face names have been
  > > kept for compatibility, but it would be good not to introduce new
> > ones.
For this you'd need to do something like:

(defface vera-font-lock-number-face ...
  ...)
(put 'vera-font-lock-number 'face-alias 'vera-font-lock-number-face)

Done.

Note that my code was not an objection in any way, just making sure
that there's a good reason for adding these faces, and there is. What is the next step? IMHO this code is ready to be checked in.

Yes, please have the code checked in.  Thanks.

Reto

;;; vera-mode.el --- major mode for editing Vera files.

;; Copyright (C) 1999-2007 Reto Zimmermann, Synopsys Inc.

;; Author:      Reto Zimmermann <address@hidden>
;; Maintainer:  Reto Zimmermann <address@hidden>
;; RCS:         $Id: vera-mode.el,v 2.26 2007/06/11 10:50:24 reto Exp reto $
;; Keywords:    languages vera
;; WWW:         http://www.iis.ee.ethz.ch/~zimmi/emacs/vera-mode.html

(defconst vera-version "2.18"
  "Vera Mode version number.")

(defconst vera-time-stamp "2007-06-11"
  "Vera Mode time stamp for last update.")

;; This file is not 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 2, 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 GNU Emacs; see the file COPYING.  If not, write to the
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;; Commentary:
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

;; This package provides a simple Emacs major mode for editing Vera code.
;; It includes the following features:

;;   - Syntax highlighting
;;   - Indentation
;;   - Word/keyword completion
;;   - Block commenting
;;   - Works under GNU Emacs and XEmacs

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Documentation

;; See comment string of function `vera-mode' or type `C-c C-h' in Emacs.

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Installation

;; Prerequisites:  GNU Emacs 20.X/21.X, XEmacs 20.X/21.X

;; Put `vera-mode.el' into the `site-lisp' directory of your Emacs installation
;; or into an arbitrary directory that is added to the load path by the
;; following line in your Emacs start-up file (`.emacs'):

;;   (setq load-path (cons (expand-file-name "<directory-name>") load-path))

;; If you already have the compiled `vera-mode.elc' file, put it in the same
;; directory.  Otherwise, byte-compile the source file:
;;   Emacs:  M-x byte-compile-file  ->  vera-mode.el
;;   Unix:   emacs -batch -q -no-site-file -f batch-byte-compile vera-mode.el

;; Add the following lines to the `site-start.el' file in the `site-lisp'
;; directory of your Emacs installation or to your Emacs start-up file
;; (`.emacs'):

;;   (autoload 'vera-mode "vera-mode" "Vera Mode" t)
;;   (setq auto-mode-alist (cons '("\\.vr[hi]?\\'" . vera-mode) 
auto-mode-alist))

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

;;; Code:

;; XEmacs handling
(defconst vera-xemacs (string-match "XEmacs" emacs-version)
  "Non-nil if XEmacs is used.")

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;; Variables
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

(defgroup vera nil
  "Customizations for Vera Mode."
  :prefix "vera-"
  :group 'languages)

(defcustom vera-basic-offset 2
  "*Amount of basic offset used for indentation."
  :type 'integer
  :group 'vera)

(defcustom vera-underscore-is-part-of-word nil
  "*Non-nil means consider the underscore character `_' as part of word.
An identifier containing underscores is then treated as a single word in
select and move operations.  All parts of an identifier separated by underscore
are treated as single words otherwise."
  :type 'boolean
  :group 'vera)

(defcustom vera-intelligent-tab t
  "*Non-nil means `TAB' does indentation, word completion and tab insertion.
That is, if preceeding character is part of a word then complete word,
else if not at beginning of line then insert tab,
else if last command was a `TAB' or `RET' then dedent one step,
else indent current line.
If nil, TAB always indents current line."
  :type 'boolean
  :group 'vera)


;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;; Mode definitions
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Key bindings

(defvar vera-mode-map ()
  "Keymap for Vera Mode.")

(setq vera-mode-map (make-sparse-keymap))
;; backspace/delete key bindings
(define-key vera-mode-map [backspace] 'backward-delete-char-untabify)
(unless (boundp 'delete-key-deletes-forward) ; XEmacs variable
  (define-key vera-mode-map [delete]       'delete-char)
  (define-key vera-mode-map [(meta delete)] 'kill-word))
;; standard key bindings
(define-key vera-mode-map "\M-e"     'vera-forward-statement)
(define-key vera-mode-map "\M-a"     'vera-backward-statement)
(define-key vera-mode-map "\M-\C-e"  'vera-forward-same-indent)
(define-key vera-mode-map "\M-\C-a"  'vera-backward-same-indent)
;; mode specific key bindings
(define-key vera-mode-map "\C-c\t"   'indent-according-to-mode)
(define-key vera-mode-map "\M-\C-\\" 'vera-indent-region)
(define-key vera-mode-map "\C-c\C-c" 'vera-comment-uncomment-region)
(define-key vera-mode-map "\C-c\C-f" 'vera-fontify-buffer)
(define-key vera-mode-map "\C-c\C-v" 'vera-version)
(define-key vera-mode-map "\M-\t"    'tab-to-tab-stop)
;; electric key bindings
(define-key vera-mode-map "\t"       'vera-electric-tab)
(define-key vera-mode-map "\r"       'vera-electric-return)
(define-key vera-mode-map " "        'vera-electric-space)
(define-key vera-mode-map "{"        'vera-electric-opening-brace)
(define-key vera-mode-map "}"        'vera-electric-closing-brace)
(define-key vera-mode-map "#"        'vera-electric-pound)
(define-key vera-mode-map "*"        'vera-electric-star)
(define-key vera-mode-map "/"        'vera-electric-slash)

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Menu

(require 'easymenu)

(easy-menu-define vera-mode-menu vera-mode-map
  "Menu keymap for Vera Mode."
  '("Vera"
    ["(Un)Comment Out Region"   vera-comment-uncomment-region (mark)]
    "--"
    ["Move Forward Statement"   vera-forward-statement t]
    ["Move Backward Statement"  vera-backward-statement t]
    ["Move Forward Same Indent" vera-forward-same-indent t]
    ["Move Backward Same Indent" vera-backward-same-indent t]
    "--"
    ["Indent Line"              indent-according-to-mode t]
    ["Indent Region"            vera-indent-region (mark)]
    ["Indent Buffer"            vera-indent-buffer t]
    "--"
    ["Fontify Buffer"           vera-fontify-buffer t]
    "--"
    ["Documentation"            describe-mode]
    ["Version"                  vera-version t]
    ["Bug Report..."            vera-submit-bug-report t]
    "--"
    ("Options"
     ["Indentation Offset..." (customize-option 'vera-basic-offset) t]
     ["Underscore is Part of Word"
      (customize-set-variable 'vera-underscore-is-part-of-word
                              (not vera-underscore-is-part-of-word))
      :style toggle :selected vera-underscore-is-part-of-word]
     ["Use Intelligent Tab"
      (customize-set-variable 'vera-intelligent-tab
                              (not vera-intelligent-tab))
      :style toggle :selected vera-intelligent-tab]
     "--"
     ["Save Options" customize-save-customized t]
     "--"
     ["Customize..."            vera-customize t])))

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Syntax table

(defvar vera-mode-syntax-table
  (let ((syntax-table (make-syntax-table)))
    ;; punctuation
    (modify-syntax-entry ?\# "."    syntax-table)
    (modify-syntax-entry ?\$ "."    syntax-table)
    (modify-syntax-entry ?\% "."    syntax-table)
    (modify-syntax-entry ?\& "."    syntax-table)
    (modify-syntax-entry ?\' "."    syntax-table)
    (modify-syntax-entry ?\* "."    syntax-table)
    (modify-syntax-entry ?\- "."    syntax-table)
    (modify-syntax-entry ?\+ "."    syntax-table)
    (modify-syntax-entry ?\. "."    syntax-table)
    (modify-syntax-entry ?\/ "."    syntax-table)
    (modify-syntax-entry ?\: "."    syntax-table)
    (modify-syntax-entry ?\; "."    syntax-table)
    (modify-syntax-entry ?\< "."    syntax-table)
    (modify-syntax-entry ?\= "."    syntax-table)
    (modify-syntax-entry ?\> "."    syntax-table)
    (modify-syntax-entry ?\\ "."    syntax-table)
    (modify-syntax-entry ?\| "."    syntax-table)
    ;; string
    (modify-syntax-entry ?\" "\""   syntax-table)
    ;; underscore
    (when vera-underscore-is-part-of-word
      (modify-syntax-entry ?\_ "w"    syntax-table))
    ;; escape
    (modify-syntax-entry ?\\ "\\"   syntax-table)
    ;; parentheses to match
    (modify-syntax-entry ?\( "()"   syntax-table)
    (modify-syntax-entry ?\) ")("   syntax-table)
    (modify-syntax-entry ?\[ "(]"   syntax-table)
    (modify-syntax-entry ?\] ")["   syntax-table)
    (modify-syntax-entry ?\{ "(}"   syntax-table)
    (modify-syntax-entry ?\} "){"   syntax-table)
    ;; comment
    (if vera-xemacs
        (modify-syntax-entry ?\/ ". 1456" syntax-table) ; XEmacs
      (modify-syntax-entry ?\/ ". 124b" syntax-table)) ; Emacs
    (modify-syntax-entry ?\* ". 23" syntax-table)
    ;; newline and CR
    (modify-syntax-entry ?\n "> b"    syntax-table)
    (modify-syntax-entry ?\^M "> b"   syntax-table)
    syntax-table)
  "Syntax table used in `vera-mode' buffers.")

(defvar vera-mode-ext-syntax-table
  (let ((syntax-table (copy-syntax-table vera-mode-syntax-table)))
    ;; extended syntax table including '_' (for simpler search regexps)
    (modify-syntax-entry ?_ "w" syntax-table)
    syntax-table)
  "Syntax table extended by `_' used in `vera-mode' buffers.")

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Mode definition

;;;###autoload (add-to-list 'auto-mode-alist '("\\.vr[hi]?\\'" . vera-mode))

;;;###autoload
(defun vera-mode ()
  "Major mode for editing Vera code.

Usage:
------

  INDENTATION:  Typing `TAB' at the beginning of a line indents the line.
    The amount of indentation is specified by option `vera-basic-offset'.
    Indentation can be done for an entire region \(`M-C-\\') or buffer (menu).
    `TAB' always indents the line if option `vera-intelligent-tab' is nil.

  WORD/COMMAND COMPLETION:  Typing `TAB' after a (not completed) word looks
    for a word in the buffer or a Vera keyword that starts alike, inserts it
    and adjusts case.  Re-typing `TAB' toggles through alternative word
    completions.

    Typing `TAB' after a non-word character inserts a tabulator stop (if not
    at the beginning of a line).  `M-TAB' always inserts a tabulator stop.

  COMMENTS:  `C-c C-c' comments out a region if not commented out, and
    uncomments a region if already commented out.

  HIGHLIGHTING (fontification):  Vera keywords, predefined types and
    constants, function names, declaration names, directives, as well as
    comments and strings are highlighted using different colors.

  VERA VERSION:  OpenVera 1.4 and Vera version 6.2.8.


Maintenance:
------------

To submit a bug report, use the corresponding menu entry within Vera Mode.
Add a description of the problem and include a reproducible test case.

Feel free to send questions and enhancement requests to <address@hidden>.

Official distribution is at
<http://www.iis.ee.ethz.ch/~zimmi/emacs/vera-mode.html>.


                                                  The Vera Mode Maintainer
                                               Reto Zimmermann <address@hidden>

Key bindings:
-------------

\\{vera-mode-map}"
  (interactive)
  (kill-all-local-variables)
  (setq major-mode 'vera-mode)
  (setq mode-name "Vera")
  ;; set maps and tables
  (use-local-map vera-mode-map)
  (set-syntax-table vera-mode-syntax-table)
  ;; set local variables
  (require 'cc-cmds)
  (set (make-local-variable 'comment-start) "//")
  (set (make-local-variable 'comment-end) "")
  (set (make-local-variable 'comment-column) 40)
  (set (make-local-variable 'comment-start-skip) "/\\*+ *\\|//+ *")
  (set (make-local-variable 'comment-end-skip) " *\\*+/\\| *//+")
  (set (make-local-variable 'comment-indent-function) 'c-comment-indent)
  (set (make-local-variable 'paragraph-start) "^$")
  (set (make-local-variable 'paragraph-separate) paragraph-start)
  (set (make-local-variable 'require-final-newline) t)
  (set (make-local-variable 'indent-tabs-mode) nil)
  (set (make-local-variable 'indent-line-function) 'vera-indent-line)
  (set (make-local-variable 'parse-sexp-ignore-comments) t)
  ;; initialize font locking
  (set (make-local-variable 'font-lock-defaults)
       '(vera-font-lock-keywords nil nil ((?\_ . "w"))))
  ;; add menu (XEmacs)
  (easy-menu-add vera-mode-menu)
  ;; miscellaneous
  (message "Vera Mode %s.  Type C-c C-h for documentation." vera-version)
  ;; run hooks
  (run-hooks 'vera-mode-hook))


;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;; Vera definitions
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;; Keywords

(defconst vera-keywords
  '(
    "after" "all" "any" "around" "assoc_index" "assoc_size" "async"
    "bad_state" "bad_trans" "before" "begin" "big_endian" "bind"
    "bin_activation" "bit_normal" "bit_reverse" "break" "breakpoint"
    "case" "casex" "casez" "class" "constraint" "continue"
    "coverage" "coverage_block" "coverage_def" "coverage_depth"
    "coverage_goal" "coverage_group" "coverage_option" "coverage_val"
    "cross_num_print_missing" "cross_auto_bin_max" "cov_comment"
    "default" "depth" "dist" "do"
    "else" "end" "enum" "exhaustive" "export" "extends" "extern"
    "for" "foreach" "fork" "function"
    "hdl_task" "hdl_node" "hide"
    "if" "illegal_self_transition" "illegal_state" "illegal_transition"
    "in" "interface" "invisible"
    "join"
    "little_endian" "local"
    "m_bad_state" "m_bad_trans" "m_state" "m_trans"
    "negedge" "new" "newcov" "non_rand" "none" "not" "null"
    "or" "ordered"
    "packed" "port" "posedge" "proceed" "prod" "prodget" "prodset"
    "program" "protected" "public"
    "rand" "randc" "randcase" "randseq" "repeat" "return" "rules"
    "sample" "sample_event" "shadow" "soft" "state" "static" "super"
    "task" "terminate" "this" "trans" "typedef"
    "unpacked"
    "var" "vca" "vector" "verilog_node" "verilog_task"
    "vhdl_node" "vhdl_task" "virtual" "virtuals" "visible" "void"
    "while" "wildcard" "with"
    )
  "List of Vera keywords.")

(defconst vera-types
  '(
    "integer" "bit" "reg" "string" "bind_var" "event"
    "inout" "input" "output"
    "ASYNC" "CLOCK"
    "NDRIVE" "NHOLD" "NRX" "NRZ" "NR0" "NR1" "NSAMPLE"
    "PDRIVE" "PHOLD" "PRX" "PRZ" "PR0" "PR1" "PSAMPLE"
    )
  "List of Vera predefined types.")

(defconst vera-q-values
  '(
    "gnr" "grx" "grz" "gr0" "gr1"
    "nr" "rx" "rz" "r0" "r1"
    "snr" "srx" "srz" "sr0" "sr1"
    )
  "List of Vera predefined VCA q_values.")

(defconst vera-functions
  '(
    ;; system functions and tasks
    "alloc"
    "call_func" "call_task" "cast_assign" "close_conn" "cm_coverage"
    "cm_get_coverage" "cm_get_limit"
    "coverage_backup_database_file" "coverage_save_database"
    "delay"
    "error" "error_mode" "error_wait" "exit"
    "fclose" "feof" "ferror" "fflush" "flag" "fopen" "fprintf" "freadb"
    "freadb" "freadh" "freadstr"
    "get_bind" "get_bind_id" "get_conn_err" "get_cycle" "get_env"
    "get_memsize" "get_plus_arg" "get_systime" "get_time" "get_time_unit"
    "getstate"
    "initstate"
    "lock_file"
    "mailbox_get" "mailbox_put" "mailbox_receive" "mailbox_send"
    "make_client" "make_server"
    "os_command"
    "printf" "psprintf"
    "query" "query_str" "query_x"
    "rand48" "random" "region_enter" "region_exit" "rewind"
    "semaphore_get" "semaphore_put" "setstate" "signal_connect" "simwave_plot"
    "srandom" "sprintf" "sscanf" "stop" "suspend_thread" "sync"
    "timeout" "trace" "trigger"
    "unit_delay" "unlock_file" "up_connections"
    "urand48" "urandom" "urandom_range"
    "vera_bit_reverse" "vera_crc" "vera_pack" "vera_pack_big_endian"
    "vera_plot" "vera_report_profile" "vera_unpack" "vera_unpack_big_endian"
    "vsv_call_func" "vsv_call_task" "vsv_close_conn" "vsv_get_conn_err"
    "vsv_make_client" "vsv_make_server" "vsv_up_connections"
    "vsv_wait_for_done" "vsv_wait_for_input"
    "wait_child" "wait_var"
    ;; class methods
    "Configure" "DisableTrigger" "DoAction" "EnableCount" "EnableTrigger"
    "Event" "GetAssert" "GetCount" "GetFirstAssert" "GetName" "GetNextAssert"
    "Wait"
    "atobin" "atohex" "atoi" "atooct"
    "backref" "bittostr" "capacity" "compare" "constraint_mode"
    "delete"
    "empty"
    "find" "find_index" "first" "first_index"
    "get_at_least" "get_auto_bin" "get_cov_weight" "get_coverage_goal"
    "get_cross_bin_max" "get_status" "get_status_msg" "getc"
    "hash"
    "icompare" "insert" "inst_get_at_least" "inst_get_auto_bin_max"
    "inst_get_collect" "inst_get_cov_weight" "inst_get_coverage_goal"
    "inst_getcross_bin_max" "inst_query" "inst_set_at_least"
    "inst_set_auto_bin_max" "inst_set_bin_activiation" "inst_set_collect"
    "inst_set_cov_weight" "inst_set_coverage_goal" "inst_set_cross_bin_max"
    "itoa"
    "last" "last_index" "len" "load"
    "match" "max" "max_index" "min" "min_index"
    "object_compare" "object_copy" "object_print"
    "pack" "pick_index" "pop_back" "pop_front" "post_pack" "post_randomize"
    "post_unpack" "postmatch" "pre_pack" "pre_randomize" "prematch" "push_back"
    "push_front" "putc"
    "query" "query_str"
    "rand_mode" "randomize" "reserve" "reverse" "rsort"
    "search" "set_at_least" "set_auto_bin_max" "set_bin_activiation"
    "set_cov_weight" "set_coverage_goal" "set_cross_bin_max" "set_name" "size"
    "sort" "substr" "sum"
    "thismatch" "tolower" "toupper"
    "unique_index" "unpack"
    ;; empty methods
    "new" "object_compare"
    "post_boundary" "post_pack" "post_randomize" "post_unpack" "pre-randomize"
    "pre_boundary" "pre_pack" "pre_unpack"
    )
  "List of Vera predefined system functions, tasks and class methods.")

(defconst vera-constants
  '(
    "ALL" "ANY"
    "BAD_STATE" "BAD_TRANS"
    "CALL" "CHECK" "CHGEDGE" "CLEAR" "COPY_NO_WAIT" "COPY_WAIT"
    "CROSS" "CROSS_TRANS"
    "DEBUG" "DELETE"
    "EC_ARRAYX" "EC_CODE_END" "EC_CONFLICT" "EC_EVNTIMOUT" "EC_EXPECT"
    "EC_FULLEXPECT" "EC_MBXTMOUT" "EC_NEXPECT" "EC_RETURN" "EC_RGNTMOUT"
    "EC_SCONFLICT" "EC_SEMTMOUT" "EC_SEXPECT" "EC_SFULLEXPECT" "EC_SNEXTPECT"
    "EC_USERSET" "EQ" "EVENT"
    "FAIL" "FIRST" "FORK"
    "GE" "GOAL" "GT" "HAND_SHAKE" "HI" "HIGH" "HNUM"
    "LE" "LIC_EXIT" "LIC_PRERR" "LIC_PRWARN" "LIC_WAIT" "LO" "LOAD" "LOW" "LT"
    "MAILBOX" "MAX_COM"
    "NAME" "NE" "NEGEDGE" "NEXT" "NO_OVERLAP" "NO_OVERLAP_STATE"
    "NO_OVERLAP_TRANS" "NO_VARS" "NO_WAIT" "NUM" "NUM_BIN" "NUM_DET"
    "OFF" "OK" "OK_LAST" "ON" "ONE_BLAST" "ONE_SHOT" "ORDER"
    "PAST_IT" "PERCENT" "POSEDGE" "PROGRAM"
    "RAWIN" "REGION" "REPORT"
    "SAMPLE" "SAVE" "SEMAPHORE" "SET" "SILENT" "STATE" "STR"
    "STR_ERR_OUT_OF_RANGE" "STR_ERR_REGEXP_SYNTAX" "SUM"
    "TRANS"
    "VERBOSE"
    "WAIT"
    "stderr" "stdin" "stdout"
    )
  "List of Vera predefined constants.")

(defconst vera-rvm-types
  '(
    "VeraListIterator_VeraListIterator_rvm_log"
    "VeraListIterator_rvm_data" "VeraListIterator_rvm_log"
    "VeraListNodeVeraListIterator_rvm_log" "VeraListNodervm_data"
    "VeraListNodervm_log" "VeraList_VeraListIterator_rvm_log"
    "VeraList_rvm_data" "VeraList_rvm_log"
    "rvm_broadcast" "rvm_channel_class" "rvm_data" "rvm_data" "rvm_env"
    "rvm_log" "rvm_log_modifier" "rvm_log_msg" "rvm_log_msg" "rvm_log_msg_info"
    "rvm_log_watchpoint" "rvm_notify" "rvm_notify_event"
    "rvm_notify_event_config" "rvm_scheduler" "rvm_scheduler_election"
    "rvm_watchdog" "rvm_watchdog_port" "rvm_xactor" "rvm_xactor_callbacks"
   )
  "List of Vera-RVM keywords.")

(defconst vera-rvm-functions
  '(
    "extern_rvm_atomic_gen" "extern_rvm_channel" "extern_rvm_scenario_gen"
    "rvm_OO_callback" "rvm_atomic_gen" "rvm_atomic_gen_callbacks_decl"
    "rvm_atomic_gen_decl" "rvm_atomic_scenario_decl" "rvm_channel"
    "rvm_channel_" "rvm_channel_decl" "rvm_command" "rvm_cycle" "rvm_debug"
    "rvm_error" "rvm_fatal" "rvm_note" "rvm_protocol" "rvm_report"
    "rvm_scenario_decl" "rvm_scenario_election_decl" "rvm_scenario_gen"
    "rvm_scenario_gen_callbacks_decl" "rvm_scenario_gen_decl"
    "rvm_trace" "rvm_transaction" "rvm_user" "rvm_verbose" "rvm_warning"
   )
  "List of Vera-RVM functions.")

(defconst vera-rvm-constants
  '(
   "RVM_NUMERIC_VERSION_MACROS" "RVM_VERSION" "RVM_MINOR" "RVM_PATCH"
   "rvm_channel__SOURCE" "rvm_channel__SINK" "rvm_channel__NO_ACTIVE"
   "rvm_channel__ACT_PENDING" "rvm_channel__ACT_STARTED"
   "rvm_channel__ACT_COMPLETED" "rvm_channel__FULL" "rvm_channel__EMPTY"
   "rvm_channel__PUT" "rvm_channel__GOT" "rvm_channel__PEEKED"
   "rvm_channel__ACTIVATED" "rvm_channel__STARTED" "rvm_channel__COMPLETED"
   "rvm_channel__REMOVED" "rvm_channel__LOCKED" "rvm_channel__UNLOCKED"
   "rvm_data__EXECUTE" "rvm_data__STARTED" "rvm_data__ENDED"
   "rvm_env__CFG_GENED" "rvm_env__BUILT" "rvm_env__DUT_CFGED"
   "rvm_env__STARTED" "rvm_env__RESTARTED" "rvm_env__ENDED" "rvm_env__STOPPED"
   "rvm_env__CLEANED" "rvm_env__DONE" "rvm_log__DEFAULT" "rvm_log__UNCHANGED"
   "rvm_log__FAILURE_TYP" "rvm_log__NOTE_TYP" "rvm_log__DEBUG_TYP"
   "rvm_log__REPORT_TYP" "rvm_log__NOTIFY_TYP" "rvm_log__TIMING_TYP"
   "rvm_log__XHANDLING_TYP" "rvm_log__PROTOCOL_TYP" "rvm_log__TRANSACTION_TYP"
   "rvm_log__COMMAND_TYP" "rvm_log__CYCLE_TYP" "rvm_log__USER_TYP_0"
   "rvm_log__USER_TYP_1" "rvm_log__USER_TYP_2" "rvm_log__USER_TYP_3"
   "rvm_log__DEFAULT_TYP" "rvm_log__ALL_TYPES" "rvm_log__FATAL_SEV"
   "rvm_log__ERROR_SEV" "rvm_log__WARNING_SEV" "rvm_log__NORMAL_SEV"
   "rvm_log__TRACE_SEV" "rvm_log__DEBUG_SEV" "rvm_log__VERBOSE_SEV"
   "rvm_log__HIDDEN_SEV" "rvm_log__IGNORE_SEV" "rvm_log__DEFAULT_SEV"
   "rvm_log__ALL_SEVERITIES" "rvm_log__CONTINUE" "rvm_log__COUNT_AS_ERROR"
   "rvm_log__DEBUGGER" "rvm_log__DUMP" "rvm_log__STOP" "rvm_log__ABORT"
   "rvm_notify__ONE_SHOT_TRIGGER" "rvm_notify__ONE_BLAST_TRIGGER"
   "rvm_notify__HAND_SHAKE_TRIGGER" "rvm_notify__ON_OFF_TRIGGER"
   "rvm_xactor__XACTOR_IDLE" "rvm_xactor__XACTOR_BUSY"
   "rvm_xactor__XACTOR_STARTED" "rvm_xactor__XACTOR_STOPPED"
   "rvm_xactor__XACTOR_RESET" "rvm_xactor__XACTOR_SOFT_RST"
   "rvm_xactor__XACTOR_FIRM_RST" "rvm_xactor__XACTOR_HARD_RST"
   "rvm_xactor__XACTOR_PROTOCOL_RST" "rvm_broadcast__AFAP"
   "rvm_broadcast__ALAP" "rvm_watchdog__TIMEOUT"
   "rvm_env__DUT_RESET" "rvm_log__INTERNAL_TYP"
   "RVM_SCHEDULER_IS_XACTOR" "RVM_BROADCAST_IS_XACTOR"
  )
  "List of Vera-RVM predefined constants.")

;; `regexp-opt' undefined (`xemacs-devel' not installed)
(unless (fboundp 'regexp-opt)
  (defun regexp-opt (strings &optional paren)
    (let ((open (if paren "\\(" "")) (close (if paren "\\)" "")))
      (concat open (mapconcat 'regexp-quote strings "\\|") close))))

(defconst vera-keywords-regexp
  (concat "\\<\\(" (regexp-opt vera-keywords) "\\)\\>")
  "Regexp for Vera keywords.")

(defconst vera-types-regexp
  (concat "\\<\\(" (regexp-opt vera-types) "\\)\\>")
  "Regexp for Vera predefined types.")

(defconst vera-q-values-regexp
  (concat "\\<\\(" (regexp-opt vera-q-values) "\\)\\>")
  "Regexp for Vera predefined VCA q_values.")

(defconst vera-functions-regexp
  (concat "\\<\\(" (regexp-opt vera-functions) "\\)\\>")
  "Regexp for Vera predefined system functions, tasks and class methods.")

(defconst vera-constants-regexp
  (concat "\\<\\(" (regexp-opt vera-constants) "\\)\\>")
  "Regexp for Vera predefined constants.")

(defconst vera-rvm-types-regexp
  (concat "\\<\\(" (regexp-opt vera-rvm-types) "\\)\\>")
  "Regexp for Vera-RVM keywords.")

(defconst vera-rvm-functions-regexp
  (concat "\\<\\(" (regexp-opt vera-rvm-functions) "\\)\\>")
  "Regexp for Vera-RVM predefined system functions, tasks and class methods.")

(defconst vera-rvm-constants-regexp
  (concat "\\<\\(" (regexp-opt vera-rvm-constants) "\\)\\>")
  "Regexp for Vera-RVM predefined constants.")


;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;; Font locking
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

;; XEmacs compatibility
(when vera-xemacs
  (require 'font-lock)
  (copy-face 'font-lock-reference-face 'font-lock-constant-face)
  (copy-face 'font-lock-preprocessor-face 'font-lock-builtin-face))

(defun vera-font-lock-match-item (limit)
  "Match, and move over, any declaration item after point. Adapted from
`font-lock-match-c-style-declaration-item-and-skip-to-next'."
  (condition-case nil
      (save-restriction
        (narrow-to-region (point-min) limit)
        ;; match item
        (when (looking-at "\\s-*\\(\\w+\\)")
          (save-match-data
            (goto-char (match-end 1))
            ;; move to next item
            (if (looking-at "\\(\\s-*\\(\\[[^]]*\\]\\s-*\\)?,\\)")
                (goto-char (match-end 1))
              (end-of-line) t))))
    (error t)))

(defvar vera-font-lock-keywords
  (list
   ;; highlight keywords
   (list vera-keywords-regexp 1 'font-lock-keyword-face)
   ;; highlight types
   (list vera-types-regexp 1 'font-lock-type-face)
   ;; highlight RVM types
   (list vera-rvm-types-regexp 1 'font-lock-type-face)
   ;; highlight constants
   (list vera-constants-regexp 1 'font-lock-constant-face)
   ;; highlight RVM constants
   (list vera-rvm-constants-regexp 1 'font-lock-constant-face)
   ;; highlight q_values
   (list vera-q-values-regexp 1 'font-lock-constant-face)
   ;; highlight predefined functions, tasks and methods
   (list vera-functions-regexp 1 'vera-font-lock-function-face)
   ;; highlight predefined RVM functions
   (list vera-rvm-functions-regexp 1 'vera-font-lock-function-face)
   ;; highlight functions
   '("\\<\\(\\w+\\)\\s-*(" 1 font-lock-function-name-face)
   ;; highlight various declaration names
   '("^\\s-*\\(port\\|program\\|task\\)\\s-+\\(\\w+\\)\\>"
     2 font-lock-function-name-face)
   '("^\\s-*bind\\s-+\\(\\w+\\)\\s-+\\(\\w+\\)\\>"
     (1 font-lock-function-name-face) (2 font-lock-function-name-face))
   ;; highlight interface declaration names
   '("^\\s-*\\(class\\|interface\\)\\s-+\\(\\w+\\)\\>"
     2 vera-font-lock-interface-face)
   ;; highlight variable name definitions
   (list (concat "^\\s-*" vera-types-regexp "\\s-*\\(\\[[^]]+\\]\\s-+\\)?")
         '(vera-font-lock-match-item nil nil (1 font-lock-variable-name-face)))
   (list (concat "^\\s-*" vera-rvm-types-regexp "\\s-*\\(\\[[^]]+\\]\\s-+\\)?")
         '(vera-font-lock-match-item nil nil (1 font-lock-variable-name-face)))
   ;; highlight numbers
   '("\\([0-9]*'[bdoh][0-9a-fA-FxXzZ_]+\\)" 1 vera-font-lock-number-face)
   ;; highlight filenames in #include directives
   '("^#\\s-*include\\s-*\\(<[^>\"\n]*>?\\)"
     1 font-lock-string-face)
   ;; highlight directives and directive names
   '("^#\\s-*\\(\\w+\\)\\>[ \t!]*\\(\\w+\\)?"
     (1 font-lock-builtin-face) (2 font-lock-variable-name-face nil t))
   ;; highlight `@', `$' and `#'
   '("\\(address@hidden)" 1 font-lock-keyword-face)
   ;; highlight @ and # definitions
   '("@\\s-*\\(\\w*\\)\\(\\s-*,\\s-*\\(\\w+\\)\\)?\\>[^.]"
     (1 vera-font-lock-number-face) (3 vera-font-lock-number-face nil t))
   ;; highlight interface signal name
   '("\\(\\w+\\)\\.\\w+" 1 vera-font-lock-interface-face)
   )
  "Regular expressions to highlight in Vera Mode.")

(defvar vera-font-lock-number-face 'vera-font-lock-number-face
  "Face name to use for @ definitions.")

(defvar vera-font-lock-function-face 'vera-font-lock-function-face
  "Face name to use for predefined functions and tasks.")

(defvar vera-font-lock-interface-face 'vera-font-lock-interface-face
  "Face name to use for interface names.")

(defface vera-font-lock-number-face
  '((((class color) (background light)) (:foreground "Gold4"))
    (((class color) (background dark)) (:foreground "BurlyWood1"))
    (t (:italic t :bold t)))
  "Font lock mode face used to highlight @ definitions."
  :group 'font-lock-highlighting-faces)
(put 'vera-font-lock-number 'face-alias 'vera-font-lock-number-face)

(defface vera-font-lock-function-face
  '((((class color) (background light)) (:foreground "DarkCyan"))
    (((class color) (background dark)) (:foreground "Orchid1"))
    (t (:italic t :bold t)))
  "Font lock mode face used to highlight predefined functions and tasks."
  :group 'font-lock-highlighting-faces)
(put 'vera-font-lock-function 'face-alias 'vera-font-lock-function-face)

(defface vera-font-lock-interface-face
  '((((class color) (background light)) (:foreground "Grey40"))
    (((class color) (background dark)) (:foreground "Grey80"))
    (t (:italic t :bold t)))
  "Font lock mode face used to highlight interface names."
  :group 'font-lock-highlighting-faces)
(put 'vera-font-lock-interface 'face-alias 'vera-font-lock-interface-face)

(defun vera-fontify-buffer ()
  "Fontify buffer."
  (interactive)
  (font-lock-fontify-buffer))


;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;; Indentation
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

(defvar vera-echo-syntactic-information-p nil
  "If non-nil, syntactic info is echoed when the line is indented.")

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; offset functions

(defconst vera-offsets-alist
  '((comment        . vera-lineup-C-comments)
    (comment-intro  . vera-lineup-comment)
    (string         . -1000)
    (directive      . -1000)
    (block-open     . 0)
    (block-intro    . +)
    (block-close    . 0)
    (arglist-intro  . +)
    (arglist-cont   . +)
    (arglist-cont-nonempty . 0)
    (arglist-close  . 0)
    (statement      . 0)
    (statement-cont . +)
    (substatement   . +)
    (else-clause    . 0))
  "Association list of syntactic element symbols and indentation offsets.
Adapted from `c-offsets-alist'.")

(defun vera-evaluate-offset (offset langelem symbol)
  "OFFSET can be a number, a function, a variable, a list, or one of
the symbols + or -."
  (cond
   ((eq offset '+)         (setq offset vera-basic-offset))
   ((eq offset '-)         (setq offset (- vera-basic-offset)))
   ((eq offset '++)        (setq offset (* 2 vera-basic-offset)))
   ((eq offset '--)        (setq offset (* 2 (- vera-basic-offset))))
   ((eq offset '*)         (setq offset (/ vera-basic-offset 2)))
   ((eq offset '/)         (setq offset (/ (- vera-basic-offset) 2)))
   ((functionp offset)     (setq offset (funcall offset langelem)))
   ((listp offset)
    (setq offset
          (let (done)
            (while (and (not done) offset)
              (setq done (vera-evaluate-offset (car offset) langelem symbol)
                    offset (cdr offset)))
            (if (not done)
                0
              done))))
   ((not (numberp offset)) (setq offset (symbol-value offset))))
  offset)

(defun vera-get-offset (langelem)
  "Get offset from LANGELEM which is a cons cell of the form:
\(SYMBOL . RELPOS).  The symbol is matched against
vera-offsets-alist and the offset found there is either returned,
or added to the indentation at RELPOS.  If RELPOS is nil, then
the offset is simply returned."
  (let* ((symbol (car langelem))
         (relpos (cdr langelem))
         (match  (assq symbol vera-offsets-alist))
         (offset (cdr-safe match)))
    (if (not match)
        (setq offset 0
              relpos 0)
      (setq offset (vera-evaluate-offset offset langelem symbol)))
    (+ (if (and relpos
                (< relpos (save-excursion (beginning-of-line) (point))))
           (save-excursion
             (goto-char relpos)
             (current-column))
         0)
       (vera-evaluate-offset offset langelem symbol))))

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; help functions

(defsubst vera-point (position)
  "Returns the value of point at certain commonly referenced POSITIONs.
POSITION can be one of the following symbols:
  bol  -- beginning of line
  eol  -- end of line
  boi  -- back to indentation
  ionl -- indentation of next line
  iopl -- indentation of previous line
  bonl -- beginning of next line
  bopl -- beginning of previous line
This function does not modify point or mark."
  (save-excursion
    (cond
     ((eq position 'bol)  (beginning-of-line))
     ((eq position 'eol)  (end-of-line))
     ((eq position 'boi)  (back-to-indentation))
     ((eq position 'bonl) (forward-line 1))
     ((eq position 'bopl) (forward-line -1))
     ((eq position 'iopl) (forward-line -1) (back-to-indentation))
     ((eq position 'ionl) (forward-line 1) (back-to-indentation))
     (t (error "Unknown buffer position requested: %s" position)))
    (point)))

(defun vera-in-literal (&optional lim)
  "Determine if point is in a Vera literal."
  (save-excursion
    (let ((state (parse-partial-sexp (or lim (point-min)) (point))))
      (cond
       ((nth 3 state) 'string)
       ((nth 4 state) 'comment)
       (t nil)))))

(defun vera-in-comment-p ()
  "Determine if point is in a Vera comment."
  (save-excursion
    (re-search-backward "\\(/\\*\\)\\|\\(\\*/\\)" nil t)
    (match-string 1)))

(defun vera-skip-forward-literal ()
  "Skip forward literal and return t if within one."
  (let ((state (save-excursion (parse-partial-sexp (point-min) (point)))))
    (cond
     ((nth 3 state) (search-forward "\"") t) ; inside string
     ((nth 7 state) (forward-line 1) t)      ; inside // comment
     ((nth 4 state) (search-forward "*/") t) ; inside /* */ comment
     (t nil))))

(defun vera-skip-backward-literal ()
  "Skip backward literal and return t if within one."
  (let ((state (save-excursion (parse-partial-sexp (point-min) (point)))))
    (cond
     ((nth 3 state) (search-backward "\"") t) ; inside string
     ((nth 7 state) (search-backward "//") t) ; inside // comment
     ((nth 4 state) (search-backward "/*") t) ; inside /* */ comment
     (t nil))))

(defsubst vera-re-search-forward (regexp &optional bound noerror)
  "Like `re-search-forward', but skips over matches in literals."
  (store-match-data '(nil nil))
  (while (and (re-search-forward regexp bound noerror)
              (vera-skip-forward-literal)
              (progn (store-match-data '(nil nil))
                     (if bound (< (point) bound) t))))
  (match-end 0))

(defsubst vera-re-search-backward (regexp &optional bound noerror)
  "Like `re-search-backward', but skips over matches in literals."
  (store-match-data '(nil nil))
  (while (and (re-search-backward regexp bound noerror)
              (vera-skip-backward-literal)
              (progn (store-match-data '(nil nil))
                     (if bound (> (point) bound) t))))
  (match-end 0))

(defun vera-forward-syntactic-ws (&optional lim skip-directive)
  "Forward skip of syntactic whitespace."
  (save-restriction
    (let* ((lim (or lim (point-max)))
           (here lim)
           (hugenum (point-max)))
      (narrow-to-region lim (point))
      (while (/= here (point))
        (setq here (point))
        (forward-comment hugenum)
        (when (and skip-directive (looking-at "^\\s-*#"))
          (end-of-line))))))

(defun vera-backward-syntactic-ws (&optional lim skip-directive)
  "Backward skip over syntactic whitespace."
  (save-restriction
    (let* ((lim (or lim (point-min)))
           (here lim)
           (hugenum (- (point-max))))
      (when (< lim (point))
        (narrow-to-region lim (point))
        (while (/= here (point))
          (setq here (point))
          (forward-comment hugenum)
          (when (and skip-directive
                     (save-excursion (back-to-indentation)
                                     (= (following-char) ?\#)))
            (beginning-of-line)))))))

(defmacro vera-prepare-search (&rest body)
  "Switch to syntax table that includes '_', then execute BODY, and finally
restore the old environment.  Used for consistent searching."
  `(let ((current-syntax-table (syntax-table))
         result
         (restore-prog                  ; program to restore enviroment
          '(progn
             ;; restore syntax table
             (set-syntax-table current-syntax-table))))
     ;; use extended syntax table
     (set-syntax-table vera-mode-ext-syntax-table)
     ;; execute BODY safely
     (setq result
           (condition-case info
               (progn ,@body)
             (error (eval restore-prog) ; restore environment on error
                    (error (cadr info))))) ; pass error up
     ;; restore environment
     (eval restore-prog)
     result))

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; comment indentation functions

(defsubst vera-langelem-col (langelem &optional preserve-point)
  "Convenience routine to return the column of LANGELEM's relpos.
Leaves point at the relpos unless PRESERVE-POINT is non-nil."
  (let ((here (point)))
    (goto-char (cdr langelem))
    (prog1 (current-column)
      (if preserve-point
          (goto-char here)))))

(defun vera-lineup-C-comments (langelem)
  "Line up C block comment continuation lines.
Nicked from `c-lineup-C-comments'."
  (save-excursion
    (let ((here (point))
          (stars (progn (back-to-indentation)
                        (skip-chars-forward "*")))
          (langelem-col (vera-langelem-col langelem)))
      (back-to-indentation)
      (if (not (re-search-forward "/\\([*]+\\)" (vera-point 'eol) t))
          (progn
            (if (not (looking-at "[*]+"))
                (progn
                  ;; we now have to figure out where this comment begins.
                  (goto-char here)
                  (back-to-indentation)
                  (if (looking-at "[*]+/")
                      (progn (goto-char (match-end 0))
                             (forward-comment -1))
                    (goto-char (cdr langelem))
                    (back-to-indentation))))
            (- (current-column) langelem-col))
        (if (zerop stars)
            (progn
              (skip-chars-forward " \t")
              (- (current-column) langelem-col))
          ;; how many stars on comment opening line?  if greater than
          ;; on current line, align left.  if less than or equal,
          ;; align right.  this should also pick up Javadoc style
          ;; comments.
          (if (> (length (match-string 1)) stars)
              (progn
                (back-to-indentation)
                (- (current-column) -1 langelem-col))
            (- (current-column) stars langelem-col)))))))

(defun vera-lineup-comment (langelem)
  "Line up a comment start."
  (save-excursion
    (back-to-indentation)
    (if (bolp)
        ;; not indent if at beginning of line
        -1000
      ;; otherwise indent accordingly
      (goto-char (cdr langelem))
      (current-column))))

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; move functions

(defconst vera-beg-block-re "{\\|\\<\\(begin\\|fork\\)\\>")

(defconst vera-end-block-re 
"}\\|\\<\\(end\\|join\\(\\s-+\\(all\\|any\\|none\\)\\)?\\)\\>")

(defconst vera-beg-substatement-re 
"\\<\\(else\\|for\\|if\\|repeat\\|while\\)\\>")

(defun vera-corresponding-begin (&optional recursive)
  "Find corresponding block begin if cursor is at a block end."
  (while (and (vera-re-search-backward
               (concat "\\(" vera-end-block-re "\\)\\|" vera-beg-block-re)
               nil t)
              (match-string 1))
    (vera-corresponding-begin t))
  (unless recursive (vera-beginning-of-substatement)))

(defun vera-corresponding-if ()
  "Find corresponding `if' if cursor is at `else'."
  (while (and (vera-re-search-backward "}\\|\\<\\(if\\|else\\)\\>" nil t)
              (not (equal (match-string 0) "if")))
    (if (equal (match-string 0) "else")
        (vera-corresponding-if)
      (forward-char)
      (backward-sexp))))

(defun vera-beginning-of-statement ()
  "Go to beginning of current statement."
  (let (pos)
    (while
        (progn
          ;; search for end of previous statement
          (while
              (and (vera-re-search-backward
                    (concat "[);]\\|" vera-beg-block-re
                            "\\|" vera-end-block-re) nil t)
                   (equal (match-string 0) ")"))
            (forward-char)
            (backward-sexp))
          (setq pos (match-beginning 0))
          ;; go back to beginning of current statement
          (goto-char (or (match-end 0) 0))
          (vera-forward-syntactic-ws nil t)
          (when (looking-at "(")
            (forward-sexp)
            (vera-forward-syntactic-ws nil t))
          ;; if "else" found, go to "if" and search again
          (when (looking-at "\\<else\\>")
            (vera-corresponding-if)
            (setq pos (point))
            t))
      ;; if search is repeated, go to beginning of last search
      (goto-char pos))))

(defun vera-beginning-of-substatement ()
  "Go to beginning of current substatement."
  (let ((lim (point))
        pos)
  ;; go to beginning of statement
    (vera-beginning-of-statement)
    (setq pos (point))
    ;; go forward all substatement opening statements until at LIM
    (while (and (< (point) lim)
                (vera-re-search-forward vera-beg-substatement-re lim t))
      (setq pos (match-beginning 0)))
    (vera-forward-syntactic-ws nil t)
    (when (looking-at "(")
      (forward-sexp)
      (vera-forward-syntactic-ws nil t))
    (when (< (point) lim)
      (setq pos (point)))
    (goto-char pos)))

(defun vera-forward-statement ()
  "Move forward one statement."
  (interactive)
  (vera-prepare-search
   (while (and (vera-re-search-forward
                (concat "[(;]\\|" vera-beg-block-re "\\|" vera-end-block-re)
                nil t)
               (equal (match-string 0) "("))
     (backward-char)
     (forward-sexp))
   (vera-beginning-of-substatement)))

(defun vera-backward-statement ()
  "Move backward one statement."
  (interactive)
  (vera-prepare-search
   (vera-backward-syntactic-ws nil t)
   (unless (= (preceding-char) ?\))
     (backward-char))
   (vera-beginning-of-substatement)))

(defun vera-forward-same-indent ()
  "Move forward to next line with same indent."
  (interactive)
  (let ((pos (point))
        (indent (current-indentation)))
    (beginning-of-line 2)
    (while (and (not (eobp))
                (or (looking-at "^\\s-*$")
                    (> (current-indentation) indent)))
      (beginning-of-line 2))
    (if (= (current-indentation) indent)
        (back-to-indentation)
      (message "No following line with same indent found in this block")
      (goto-char pos))))

(defun vera-backward-same-indent ()
  "Move backward to previous line with same indent."
  (interactive)
  (let ((pos (point))
        (indent (current-indentation)))
    (beginning-of-line -0)
    (while (and (not (bobp))
                (or (looking-at "^\\s-*$")
                    (> (current-indentation) indent)))
      (beginning-of-line -0))
    (if (= (current-indentation) indent)
        (back-to-indentation)
      (message "No preceding line with same indent found in this block")
      (goto-char pos))))

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; syntax analysis

(defmacro vera-add-syntax (symbol &optional relpos)
  "A simple macro to append the syntax in SYMBOL to the syntax list.
try to increase performance by using this macro."
  `(setq syntax (cons (cons ,symbol ,(or relpos 0)) syntax)))

(defun vera-guess-basic-syntax ()
  "Determine syntactic context of current line of code."
  (save-excursion
    (beginning-of-line)
    (let ((indent-point (point))
          syntax state placeholder pos)
      ;; determine syntax state
      (setq state (parse-partial-sexp (point-min) (point)))
      (cond
       ;; CASE 1: in a comment?
       ((nth 4 state)
        ;; skip empty lines
        (while (and (zerop (forward-line -1))
                    (looking-at "^\\s-*$")))
        (vera-add-syntax 'comment (vera-point 'boi)))
       ;; CASE 2: in a string?
       ((nth 3 state)
        (vera-add-syntax 'string))
       ;; CASE 3: at a directive?
       ((save-excursion (back-to-indentation) (= (following-char) ?\#))
        (vera-add-syntax 'directive (point)))
       ;; CASE 4: after an opening parenthesis (argument list continuation)?
       ((and (nth 1 state)
             (or (= (char-after (nth 1 state)) ?\()
                 ;; also for concatenation (opening '{' and ',' on eol/eopl)
                 (and (= (char-after (nth 1 state)) ?\{)
                      (or (save-excursion
                            (vera-backward-syntactic-ws) (= (char-before) ?,))
                          (save-excursion
                            (end-of-line) (= (char-before) ?,))))))
        (goto-char (1+ (nth 1 state)))
        ;; is there code after the opening parenthesis on the same line?
        (if (looking-at "\\s-*$")
            (vera-add-syntax 'arglist-cont (vera-point 'boi))
          (vera-add-syntax 'arglist-cont-nonempty (point))))
       ;; CASE 5: at a block closing?
       ((save-excursion (back-to-indentation) (looking-at vera-end-block-re))
        ;; look for the corresponding begin
        (vera-corresponding-begin)
        (vera-add-syntax 'block-close (vera-point 'boi)))
       ;; CASE 6: at a block intro (the first line after a block opening)?
       ((and (save-excursion
               (vera-backward-syntactic-ws nil t)
               ;; previous line ends with a block opening?
               (or (/= (skip-chars-backward "{") 0) (backward-word 1))
               (when (looking-at vera-beg-block-re)
                 ;; go to beginning of substatement
                 (vera-beginning-of-substatement)
                 (setq placeholder (point))))
             ;; not if "fork" is followed by "{"
             (save-excursion
               (not (and (progn (back-to-indentation) (looking-at "{"))
                         (progn (goto-char placeholder)
                                (looking-at "\\<fork\\>"))))))
        (goto-char placeholder)
        (vera-add-syntax 'block-intro (vera-point 'boi)))
       ;; CASE 7: at the beginning of an else clause?
       ((save-excursion (back-to-indentation) (looking-at "\\<else\\>"))
        ;; find corresponding if
        (vera-corresponding-if)
        (vera-add-syntax 'else-clause (vera-point 'boi)))
       ;; CASE 8: at the beginning of a statement?
       ;; is the previous command completed?
       ((or (save-excursion
              (vera-backward-syntactic-ws nil t)
              (setq placeholder (point))
              ;; at the beginning of the buffer?
              (or (bobp)
                  ;; previous line ends with a semicolon or
                  ;; is a block opening or closing?
                  (when (or (/= (skip-chars-backward "{};") 0)
                            (progn (back-to-indentation)
                                   (looking-at (concat vera-beg-block-re "\\|"
                                                       vera-end-block-re))))
                    ;; if at a block closing, go to beginning
                    (when (looking-at vera-end-block-re)
                      (vera-corresponding-begin))
                    ;; go to beginning of the statement
                    (vera-beginning-of-statement)
                    (setq placeholder (point)))
                  ;; at a directive?
                  (when (progn (back-to-indentation) (looking-at "#"))
                    ;; go to previous statement
                    (vera-beginning-of-statement)
                    (setq placeholder (point)))))
            ;; at a block opening?
            (when (save-excursion (back-to-indentation)
                                  (looking-at vera-beg-block-re))
              ;; go to beginning of the substatement
              (vera-beginning-of-substatement)
              (setq placeholder (point))))
        (goto-char placeholder)
        (vera-add-syntax 'statement (vera-point 'boi)))
       ;; CASE 9: at the beginning of a substatement?
       ;; is this line preceeded by a substatement opening statement?
       ((save-excursion (vera-backward-syntactic-ws nil t)
                        (when (= (preceding-char) ?\)) (backward-sexp))
                        (backward-word 1)
                        (setq placeholder (point))
                        (looking-at vera-beg-substatement-re))
        (goto-char placeholder)
        (vera-add-syntax 'substatement (vera-point 'boi)))
       ;; CASE 10: it must be a statement continuation!
       (t
        ;; go to beginning of statement
        (vera-beginning-of-substatement)
        (vera-add-syntax 'statement-cont (vera-point 'boi))))
      ;; special case: look for a comment start
      (goto-char indent-point)
      (skip-chars-forward " \t")
      (when (looking-at comment-start)
        (vera-add-syntax 'comment-intro))
      ;; return syntax
      syntax)))

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; indentation functions

(defun vera-indent-line ()
  "Indent the current line as Vera code. Optional SYNTAX is the
syntactic information for the current line. Returns the amount of
indentation change (in columns)."
  (interactive)
  (vera-prepare-search
   (let* ((syntax (vera-guess-basic-syntax))
          (pos (- (point-max) (point)))
          (indent (apply '+ (mapcar 'vera-get-offset syntax)))
          (shift-amt  (- (current-indentation) indent)))
     (when vera-echo-syntactic-information-p
       (message "syntax: %s, indent= %d" syntax indent))
     (unless (zerop shift-amt)
       (beginning-of-line)
       (delete-region (point) (vera-point 'boi))
       (indent-to indent))
     (if (< (point) (vera-point 'boi))
         (back-to-indentation)
       ;; If initial point was within line's indentation, position after
       ;; the indentation.  Else stay at same point in text.
       (when (> (- (point-max) pos) (point))
         (goto-char (- (point-max) pos))))
     shift-amt)))

(defun vera-indent-buffer ()
  "Indent whole buffer as Vera code.
Calls `indent-region' for whole buffer."
  (interactive)
  (message "Indenting buffer...")
  (indent-region (point-min) (point-max) nil)
  (message "Indenting buffer...done"))

(defun vera-indent-region (start end column)
  "Indent region as Vera code."
  (interactive "r\nP")
  (message "Indenting region...")
  (indent-region start end column)
  (message "Indenting region...done"))

(defsubst vera-indent-block-closing ()
  "If previous word is a block closing or `else', indent line again."
  (when (= (char-syntax (preceding-char)) ?w)
    (save-excursion
      (backward-word 1)
      (when (and (not (vera-in-literal))
                 (looking-at (concat vera-end-block-re "\\|\\<else\\>")))
        (indent-according-to-mode)))))

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; electrifications

(defun vera-electric-tab (&optional prefix-arg)
  "If preceeding character is part of a word or a paren then hippie-expand,
else if right of non whitespace on line then tab-to-tab-stop,
else if last command was a tab or return then dedent one step or if a comment
toggle between normal indent and inline comment indent,
else indent `correctly'.
If `vera-intelligent-tab' is nil, always indent line."
  (interactive "*P")
  (if vera-intelligent-tab
      (progn
        (cond ((memq (char-syntax (preceding-char)) '(?w ?_))
               (let ((case-fold-search t)
                     (case-replace nil)
                     (hippie-expand-only-buffers
                      (or (and (boundp 'hippie-expand-only-buffers)
                               hippie-expand-only-buffers)
                          '(vera-mode))))
                 (vera-expand-abbrev prefix-arg)))
              ((> (current-column) (current-indentation))
               (tab-to-tab-stop))
              ((and (or (eq last-command 'vera-electric-tab)
                        (eq last-command 'vera-electric-return))
                    (/= 0 (current-indentation)))
               (backward-delete-char-untabify vera-basic-offset nil))
              (t (indent-according-to-mode)))
        (setq this-command 'vera-electric-tab))
    (indent-according-to-mode)))

(defun vera-electric-return ()
  "Insert newline and indent.  Indent current line if it is a block closing."
  (interactive)
  (vera-indent-block-closing)
  (newline-and-indent))

(defun vera-electric-space (arg)
  "Insert a space.  Indent current line if it is a block closing."
  (interactive "*P")
  (unless arg
    (vera-indent-block-closing))
  (self-insert-command (prefix-numeric-value arg)))

(defun vera-electric-opening-brace (arg)
  "Outdent opening brace."
  (interactive "*P")
  (self-insert-command (prefix-numeric-value arg))
  (unless arg
    (indent-according-to-mode)))

(defun vera-electric-closing-brace (arg)
  "Outdent closing brace."
  (interactive "*P")
  (self-insert-command (prefix-numeric-value arg))
  (unless arg
    (indent-according-to-mode)))

(defun vera-electric-pound (arg)
  "Insert `#' and indent as directive it first character of line."
  (interactive "*P")
  (self-insert-command (prefix-numeric-value arg))
  (unless arg
    (save-excursion
      (backward-char)
      (skip-chars-backward " \t")
      (when (bolp)
        (delete-horizontal-space)))))

(defun vera-electric-star (arg)
  "Insert a star character.  Nicked from `c-electric-star'."
  (interactive "*P")
  (self-insert-command (prefix-numeric-value arg))
  (if (and (not arg)
           (memq (vera-in-literal) '(comment))
           (eq (char-before) ?*)
           (save-excursion
             (forward-char -1)
             (skip-chars-backward "*")
             (if (eq (char-before) ?/)
                 (forward-char -1))
             (skip-chars-backward " \t")
             (bolp)))
      (indent-according-to-mode)))

(defun vera-electric-slash (arg)
  "Insert a slash character.  Nicked from `c-electric-slash'."
  (interactive "*P")
  (let* ((ch (char-before))
         (indentp (and (not arg)
                       (eq last-command-char ?/)
                       (or (and (eq ch ?/)
                                (not (vera-in-literal)))
                           (and (eq ch ?*)
                                (vera-in-literal))))))
    (self-insert-command (prefix-numeric-value arg))
    (when indentp
      (indent-according-to-mode))))


;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;; Miscellaneous
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Hippie expand customization (for expansion of Vera commands)

(defvar vera-abbrev-list
  (append (list nil) vera-keywords
          (list nil) vera-types
          (list nil) vera-functions
          (list nil) vera-constants
          (list nil) vera-rvm-types
          (list nil) vera-rvm-functions
          (list nil) vera-rvm-constants)
  "Predefined abbreviations for Vera.")

(defvar vera-expand-upper-case nil)

(eval-when-compile (require 'hippie-exp))

(defun vera-try-expand-abbrev (old)
  "Try expanding abbreviations from `vera-abbrev-list'."
  (unless old
    (he-init-string (he-dabbrev-beg) (point))
    (setq he-expand-list
          (let ((abbrev-list vera-abbrev-list)
                (sel-abbrev-list '()))
            (while abbrev-list
              (when (or (not (stringp (car abbrev-list)))
                        (string-match
                         (concat "^" he-search-string) (car abbrev-list)))
                (setq sel-abbrev-list
                      (cons (car abbrev-list) sel-abbrev-list)))
              (setq abbrev-list (cdr abbrev-list)))
            (nreverse sel-abbrev-list))))
  (while (and he-expand-list
              (or (not (stringp (car he-expand-list)))
                  (he-string-member (car he-expand-list) he-tried-table t)))
    (unless (stringp (car he-expand-list))
      (setq vera-expand-upper-case (car he-expand-list)))
    (setq he-expand-list (cdr he-expand-list)))
  (if (null he-expand-list)
      (progn (when old (he-reset-string))
             nil)
    (he-substitute-string
     (if vera-expand-upper-case
         (upcase (car he-expand-list))
       (car he-expand-list))
     t)
    (setq he-expand-list (cdr he-expand-list))
    t))

;; function for expanding abbrevs and dabbrevs
(defun vera-expand-abbrev (arg))
(fset 'vera-expand-abbrev (make-hippie-expand-function
                               '(try-expand-dabbrev
                                 try-expand-dabbrev-all-buffers
                                 vera-try-expand-abbrev)))

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Comments

(defun vera-comment-uncomment-region (beg end &optional arg)
  "Comment region if not commented, uncomment region if already commented."
  (interactive "r\nP")
  (goto-char beg)
  (if (looking-at (regexp-quote comment-start))
      (comment-region beg end '(4))
    (comment-region beg end)))

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Help functions

(defun vera-customize ()
  "Call the customize function with `vera' as argument."
  (interactive)
  (customize-group 'vera))

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Other

;; remove ".vr" from `completion-ignored-extensions'
(setq completion-ignored-extensions
      (delete ".vr" completion-ignored-extensions))


;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;; Bug reports
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

(defconst vera-mode-help-address "Reto Zimmermann <address@hidden>"
  "Address for Vera Mode bug reports.")

;; get reporter-submit-bug-report when byte-compiling
(eval-when-compile
  (require 'reporter))

(defun vera-submit-bug-report ()
  "Submit via mail a bug report on Vera Mode."
  (interactive)
  ;; load in reporter
  (and
   (y-or-n-p "Do you want to submit a report on Vera Mode? ")
   (require 'reporter)
   (let ((reporter-prompt-for-summary-p t))
     (reporter-submit-bug-report
      vera-mode-help-address
      (concat "Vera Mode " vera-version)
      (list
       ;; report all important variables
       'vera-basic-offset
       'vera-underscore-is-part-of-word
       'vera-intelligent-tab
       )
      nil nil
      "Hi Reto,"))))


;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;; Documentation
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

(defun vera-version ()
  "Echo the current version of Vera Mode in the minibuffer."
  (interactive)
  (message "Vera Mode %s (%s)" vera-version vera-time-stamp))


;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

(provide 'vera-mode)

;;; vera-mode.el ends here

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