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124 lines
4.5 KiB
EmacsLisp
124 lines
4.5 KiB
EmacsLisp
;;; awk-mode.el --- AWK code editing commands for Emacs
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;; Copyright (C) 1988, 1994, 1996, 2000-2011 Free Software Foundation, Inc.
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;; Maintainer: FSF
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;; Keywords: unix, languages
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;; Obsolete-since: 22.1
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; Sets up C-mode with support for awk-style #-comments and a lightly
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;; hacked syntax table.
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;;; Code:
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(defvar awk-mode-syntax-table
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(let ((st (make-syntax-table)))
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(modify-syntax-entry ?\\ "\\" st)
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(modify-syntax-entry ?\n "> " st)
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(modify-syntax-entry ?\f "> " st)
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(modify-syntax-entry ?\# "< " st)
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;; / can delimit regexes or be a division operator. We assume that it is
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;; more commonly used for regexes and fix the remaining cases with
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;; `font-lock-syntactic-keywords'.
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(modify-syntax-entry ?/ "\"" st)
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(modify-syntax-entry ?* "." st)
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(modify-syntax-entry ?+ "." st)
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(modify-syntax-entry ?- "." st)
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(modify-syntax-entry ?= "." st)
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(modify-syntax-entry ?% "." st)
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(modify-syntax-entry ?< "." st)
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(modify-syntax-entry ?> "." st)
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(modify-syntax-entry ?& "." st)
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(modify-syntax-entry ?| "." st)
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(modify-syntax-entry ?_ "_" st)
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(modify-syntax-entry ?\' "\"" st)
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st)
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"Syntax table in use in `awk-mode' buffers.")
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;; Regexps written with help from Peter Galbraith <galbraith@mixing.qc.dfo.ca>.
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(defconst awk-font-lock-keywords
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(eval-when-compile
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(list
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;;
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;; Function names.
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'("^[ \t]*\\(function\\)\\>[ \t]*\\(\\sw+\\)?"
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(1 font-lock-keyword-face) (2 font-lock-function-name-face nil t))
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;;
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;; Variable names.
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(cons (regexp-opt
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'("ARGC" "ARGIND" "ARGV" "CONVFMT" "ENVIRON" "ERRNO"
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"FIELDWIDTHS" "FILENAME" "FNR" "FS" "IGNORECASE" "NF" "NR"
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"OFMT" "OFS" "ORS" "RLENGTH" "RS" "RSTART" "SUBSEP") 'words)
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'font-lock-variable-name-face)
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;;
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;; Keywords.
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(regexp-opt
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'("BEGIN" "END" "break" "continue" "delete" "do" "exit" "else" "for"
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"getline" "if" "next" "print" "printf" "return" "while") 'words)
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;;
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;; Builtins.
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(list (regexp-opt
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'("atan2" "close" "cos" "ctime" "exp" "gsub" "index" "int"
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"length" "log" "match" "rand" "sin" "split" "sprintf"
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"sqrt" "srand" "sub" "substr" "system" "time"
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"tolower" "toupper") 'words)
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1 'font-lock-builtin-face)
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;;
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;; Operators. Is this too much?
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(cons (regexp-opt '("&&" "||" "<=" "<" ">=" ">" "==" "!=" "!~" "~"))
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'font-lock-constant-face)
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))
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"Default expressions to highlight in AWK mode.")
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(require 'syntax)
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(defconst awk-font-lock-syntactic-keywords
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;; `/' is mostly used for /.../ regular expressions, but is also
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;; used as a division operator. Distinguishing between the two is
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;; a pain in the youknowwhat.
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;; '(("\\(^\\|[<=>-+*%/!^,~(?:|&]\\)\\s-*\\(/\\)\\([^/\n\\]\\|\\\\.\\)*\\(/\\)"
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;; (2 "\"") (4 "\"")))
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'(("[^<=>-+*%/!^,~(?:|& \t\n\f]\\s-*\\(/\\)"
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(1 (unless (nth 3 (syntax-ppss (match-beginning 1))) "."))))
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"Syntactic keywords for `awk-mode'.")
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;; No longer autoloaded since it might clobber the autoload directive in CC Mode.
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(define-derived-mode awk-mode c-mode "AWK"
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"Major mode for editing AWK code.
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This is much like C mode except for the syntax of comments. Its keymap
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inherits from C mode's and it has the same variables for customizing
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indentation. It has its own abbrev table and its own syntax table.
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Turning on AWK mode runs `awk-mode-hook'."
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(set (make-local-variable 'paragraph-start) (concat "$\\|" page-delimiter))
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(set (make-local-variable 'paragraph-separate) paragraph-start)
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(set (make-local-variable 'comment-start) "# ")
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(set (make-local-variable 'comment-end) "")
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(set (make-local-variable 'comment-start-skip) "#+ *")
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(setq font-lock-defaults '(awk-font-lock-keywords
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nil nil ((?_ . "w")) nil
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(parse-sexp-lookup-properties . t)
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(font-lock-syntactic-keywords
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. awk-font-lock-syntactic-keywords))))
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(provide 'awk-mode)
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;;; awk-mode.el ends here
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