;;; sysrpl-mode.el -- Major mode for the SysRPL programming language

;; Copyright (C) 2013 Paul Onions

;; Author: Paul Onions <paul.onions@acm.org>
;; Keywords: RPL, SysRPL, HP48, HP49, HP50, calculator

;; This file is free software, see the LICENCE file in this directory
;; for copying terms.

;;; Commentary:

;; A major mode for the SysRPL language, the system programming
;; language of HP48/49/50-series calculators.

;;; Code:

(require 'rpl-base)

(defface sysrpl-name '((t (:foreground "blue")))
  "Face used for displaying SysRPL names."
  :group 'rpl)

(defvar sysrpl-syntax-table
  (let ((table (make-syntax-table)))
    (modify-syntax-entry ?:  "w" table)
    (modify-syntax-entry ?!  "w" table)
    (modify-syntax-entry ?@  "w" table)
    (modify-syntax-entry ?#  "w" table)
    (modify-syntax-entry ?$  "w" table)
    (modify-syntax-entry ?%  "w" table)
    (modify-syntax-entry ?^  "w" table)
    (modify-syntax-entry ?&  "w" table)
    (modify-syntax-entry ?\? "w" table)
    (modify-syntax-entry ?-  "w" table)
    (modify-syntax-entry ?_  "w" table)
    (modify-syntax-entry ?=  "w" table)
    (modify-syntax-entry ?+  "w" table)
    (modify-syntax-entry ?/  "w" table)
    (modify-syntax-entry ?<  "w" table)
    (modify-syntax-entry ?>  "w" table)
    (modify-syntax-entry ?|  "w" table)
    table)
  "The SysRPL syntax table.")

(defvar sysrpl-keywords-regexp
  (concat "\\<" (regexp-opt rpl-sysrpl-names) "\\>")
  "Regular expression for SysRPL keywords.")

(defvar sysrpl-keyword-face 'sysrpl-name)

(defvar sysrpl-font-lock-keywords
  (list (cons sysrpl-keywords-regexp 'sysrpl-keyword-face)))

(defvar sysrpl-mode-map
  (let ((map (make-sparse-keymap)))
    (set-keymap-parent map rpl-common-keymap)
    map)
  "The SysRPL mode local keymap.")

(defvar sysrpl-mode-hook nil
  "Hook for customizing SysRPL mode.")

(define-derived-mode sysrpl-mode prog-mode "SysRPL"
  "Major mode for the SysRPL language."
  :group 'rpl
  (setq font-lock-defaults (list sysrpl-font-lock-keywords))
  (setq rpl-menu-compile-file-enable t))

(provide 'sysrpl-mode)