-;;; scheme.el --- Scheme (and DSSSL) editing mode
+;;; scheme.el --- Scheme (and DSSSL) editing mode -*- lexical-binding: t; -*-
-;; Copyright (C) 1986-1988, 1997-1998, 2001-2013 Free Software
+;; Copyright (C) 1986-1988, 1997-1998, 2001-2014 Free Software
;; Foundation, Inc.
;; Author: Bill Rozas <jinx@martigny.ai.mit.edu>
(modify-syntax-entry ?\( "() " st)
(modify-syntax-entry ?\) ")( " st)
;; It's used for single-line comments as well as for #;(...) sexp-comments.
- (modify-syntax-entry ?\; "< 2 " st)
+ (modify-syntax-entry ?\; "<" st)
(modify-syntax-entry ?\" "\" " st)
(modify-syntax-entry ?' "' " st)
(modify-syntax-entry ?` "' " st)
(setq-local add-log-current-defun-function #'lisp-current-defun-name)
(setq-local comment-start ";")
(setq-local comment-add 1)
- ;; Look within the line for a ; following an even number of backslashes
- ;; after either a non-backslash or the line beginning.
- (setq-local comment-start-skip
- "\\(\\(^\\|[^\\\\\n]\\)\\(\\\\\\\\\\)*\\);+[ \t]*")
- (setq-local font-lock-comment-start-skip ";+ *")
+ (setq-local comment-start-skip ";+[ \t]*")
+ (setq-local comment-use-syntax t)
(setq-local comment-column 40)
(setq-local parse-sexp-ignore-comments t)
(setq-local lisp-indent-function 'scheme-indent-function)
(setq mode-line-process '("" scheme-mode-line-process))
(setq-local imenu-case-fold-search t)
- (setq imenu-generic-expression scheme-imenu-generic-expression)
- (setq-local imenu-syntax-alist
- '(("+-*/.<>=?!$%_&~^:" . "w")))
+ (setq-local imenu-generic-expression scheme-imenu-generic-expression)
+ (setq-local imenu-syntax-alist '(("+-*/.<>=?!$%_&~^:" . "w")))
+ (setq-local syntax-propertize-function #'scheme-syntax-propertize)
(setq font-lock-defaults
'((scheme-font-lock-keywords
scheme-font-lock-keywords-1 scheme-font-lock-keywords-2)
nil t (("+-*/.<>=!?$%_&~^:" . "w") (?#. "w 14"))
beginning-of-defun
- (font-lock-mark-block-function . mark-defun)
- (font-lock-syntactic-face-function
- . scheme-font-lock-syntactic-face-function)
- (parse-sexp-lookup-properties . t)
- (font-lock-extra-managed-props syntax-table)))
+ (font-lock-mark-block-function . mark-defun)))
(setq-local lisp-doc-string-elt-property 'scheme-doc-string-elt))
(defvar scheme-mode-line-process "")
Commands:
Delete converts tabs to spaces as it moves back.
Blank lines separate paragraphs. Semicolons start comments.
-\\{scheme-mode-map}
-Entry to this mode calls the value of `scheme-mode-hook'
-if that value is non-nil."
+\\{scheme-mode-map}"
(scheme-mode-variables))
(defgroup scheme nil
"\\|-module"
"\\)\\)\\>"
;; Any whitespace and declared object.
- "[ \t]*(?"
+ ;; The "(*" is for curried definitions, e.g.,
+ ;; (define ((sum a) b) (+ a b))
+ "[ \t]*(*"
"\\(\\sw+\\)?")
'(1 font-lock-keyword-face)
'(6 (cond ((match-beginning 3) font-lock-function-name-face)
"(" (regexp-opt
'("begin" "call-with-current-continuation" "call/cc"
"call-with-input-file" "call-with-output-file" "case" "cond"
- "do" "else" "for-each" "if" "lambda"
+ "do" "else" "for-each" "if" "lambda" "λ"
"let" "let*" "let-syntax" "letrec" "letrec-syntax"
+ ;; R6RS library subforms.
+ "export" "import"
;; SRFI 11 usage comes up often enough.
"let-values" "let*-values"
;; Hannes Haug <hannes.haug@student.uni-tuebingen.de> wants:
;;
;; Scheme `:' and `#:' keywords as builtins.
'("\\<#?:\\sw+\\>" . font-lock-builtin-face)
+ ;; R6RS library declarations.
+ '("(\\(\\<library\\>\\)\\s-*(?\\(\\sw+\\)?"
+ (1 font-lock-keyword-face)
+ (2 font-lock-type-face))
)))
"Gaudy expressions to highlight in Scheme modes.")
(forward-comment (point-max))
(if (eq (char-after) ?\() 2 0)))
-(defun scheme-font-lock-syntactic-face-function (state)
- (when (and (null (nth 3 state))
- (eq (char-after (nth 8 state)) ?#)
- (eq (char-after (1+ (nth 8 state))) ?\;))
- ;; It's a sexp-comment. Tell parse-partial-sexp where it ends.
- (save-excursion
- (let ((pos (point))
- (end
- (condition-case err
- (let ((parse-sexp-lookup-properties nil))
- (goto-char (+ 2 (nth 8 state)))
- ;; FIXME: this doesn't handle the case where the sexp
- ;; itself contains a #; comment.
- (forward-sexp 1)
- (point))
- (scan-error (nth 2 err)))))
- (when (< pos (- end 2))
- (put-text-property pos (- end 2)
- 'syntax-table scheme-sexp-comment-syntax-table))
- (put-text-property (- end 1) end 'syntax-table '(12)))))
- ;; Choose the face to use.
- (lisp-font-lock-syntactic-face-function state))
+(defun scheme-syntax-propertize (beg end)
+ (goto-char beg)
+ (scheme-syntax-propertize-sexp-comment (point) end)
+ (funcall
+ (syntax-propertize-rules
+ ("\\(#\\);" (1 (prog1 "< cn"
+ (scheme-syntax-propertize-sexp-comment (point) end)))))
+ (point) end))
+
+(defun scheme-syntax-propertize-sexp-comment (_ end)
+ (let ((state (syntax-ppss)))
+ (when (eq 2 (nth 7 state))
+ ;; It's a sexp-comment. Tell parse-partial-sexp where it ends.
+ (condition-case nil
+ (progn
+ (goto-char (+ 2 (nth 8 state)))
+ ;; FIXME: this doesn't handle the case where the sexp
+ ;; itself contains a #; comment.
+ (forward-sexp 1)
+ (put-text-property (1- (point)) (point)
+ 'syntax-table (string-to-syntax "> cn")))
+ (scan-error (goto-char end))))))
;;;###autoload
(define-derived-mode dsssl-mode scheme-mode "DSSSL"
(put 'make 'scheme-indent-function 1)
(put 'style 'scheme-indent-function 1)
(put 'root 'scheme-indent-function 1)
+(put 'λ 'scheme-indent-function 1)
(defvar dsssl-font-lock-keywords
(eval-when-compile
\f
;;; Let is different in Scheme
-(defun would-be-symbol (string)
- (not (string-equal (substring string 0 1) "(")))
+;; (defun scheme-would-be-symbol (string)
+;; (not (string-equal (substring string 0 1) "(")))
-(defun next-sexp-as-string ()
- ;; Assumes that it is protected by a save-excursion
- (forward-sexp 1)
- (let ((the-end (point)))
- (backward-sexp 1)
- (buffer-substring (point) the-end)))
+;; (defun scheme-next-sexp-as-string ()
+;; ;; Assumes that it is protected by a save-excursion
+;; (forward-sexp 1)
+;; (let ((the-end (point)))
+;; (backward-sexp 1)
+;; (buffer-substring (point) the-end)))
;; This is correct but too slow.
;; The one below works almost always.
;;(defun scheme-let-indent (state indent-point)
-;; (if (would-be-symbol (next-sexp-as-string))
+;; (if (scheme-would-be-symbol (scheme-next-sexp-as-string))
;; (scheme-indent-specform 2 state indent-point)
;; (scheme-indent-specform 1 state indent-point)))
(put 'letrec-syntax 'scheme-indent-function 1)
(put 'syntax-rules 'scheme-indent-function 1)
(put 'syntax-case 'scheme-indent-function 2) ; not r5rs
+(put 'library 'scheme-indent-function 1) ; R6RS
(put 'call-with-input-file 'scheme-indent-function 1)
(put 'with-input-from-file 'scheme-indent-function 1)
(put 'unassigned\?-components 'scheme-indent-function 1)
(put 'unbound\?-components 'scheme-indent-function 1)
(put 'variable-components 'scheme-indent-function 1)))
+\f
+;; Scheme Interaction Mode
+
+(defun scheme-eval-defun ()
+ (interactive)
+ (let ((debug-on-error eval-expression-debug-on-error)
+ (print-length eval-expression-print-length)
+ (print-level eval-expression-print-level))
+ (let* ((value (eval-scheme (thing-at-point 'defun t)))
+ (str (eval-expression-print-format value)))
+ (prin1 value t)
+ (if str (princ str))
+ value)))
+
+(defun scheme-eval-print-last-sexp (arg)
+ (interactive "P")
+ (setq arg (or arg t))
+ (let ((standard-output (current-buffer)))
+ (terpri)
+ (let ((standard-output (if arg (current-buffer) t))
+ (form (buffer-substring-no-properties
+ (save-excursion (backward-sexp) (point))
+ (point))))
+ (eval-last-sexp-print-value (eval-scheme form) arg))
+ (terpri)))
+
+(defvar scheme-interaction-mode-map
+ (let ((map (make-sparse-keymap))
+ (menu-map (make-sparse-keymap "Scheme-Interaction")))
+ (set-keymap-parent map lisp-mode-shared-map)
+ (define-key map "\e\C-x" 'scheme-eval-defun)
+ (define-key map "\n" 'scheme-eval-print-last-sexp)
+ (bindings--define-key map [menu-bar scheme-interaction]
+ (cons "Scheme-Interaction" menu-map))
+ (bindings--define-key menu-map [eval-defun]
+ '(menu-item "Evaluate Defun" scheme-eval-defun
+ :help "Evaluate the top-level form containing point, or after point"))
+ (bindings--define-key menu-map [print-last-sexp]
+ '(menu-item "Evaluate and Print" scheme-eval-print-last-sexp
+ :help "Evaluate sexp before point; print value into current buffer"))
+ (bindings--define-key menu-map [indent-sexp]
+ '(menu-item "Indent" indent-sexp
+ :help "Indent each line of the list starting just after point"))
+ map)
+ "Keymap for Scheme Interaction mode.
+All commands in `lisp-mode-shared-map' are inherited by this map.")
+
+(define-derived-mode scheme-interaction-mode scheme-mode "Scheme Interaction"
+ "Major mode for typing and evaluating Scheme forms.
+Like Scheme mode except that \\[scheme-eval-print-last-sexp] evals the
+Scheme expression before point, and prints its value into the
+buffer, advancing point. Note that printing is controlled by
+`eval-expression-print-length' and `eval-expression-print-level'.
+
+Commands:
+Delete converts tabs to spaces as it moves back.
+Paragraphs are separated only by blank lines.
+Semicolons start comments.
+
+\\{scheme-interaction-mode-map}"
+ :abbrev-table nil)
(provide 'scheme)
HCoop / bpt / emacs.git / blobdiff