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;;; Language interface for Wisp in Guile
;; Copyright (C) 2005--2014 by David A. Wheeler and Alan Manuel K. Gloria
;; Copyright (C) 2014--2023 Arne Babenhauserheide.
;; Copyright (C) 2023 Maxime Devos <[email protected]>
;;;; This library is free software; you can redistribute it and/or
;;;; modify it under the terms of the GNU Lesser General Public
;;;; License as published by the Free Software Foundation; either
;;;; version 3 of the License, or (at your option) any later version.
;;;;
;;;; This library 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
;;;; Lesser General Public License for more details.
;;;;
;;;; You should have received a copy of the GNU Lesser General Public
;;;; License along with this library; if not, write to the Free Software
;;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
;; adapted from spec.scm: https://gitorious.org/nacre/guile-sweet/?p=nacre:guile-sweet.git;a=blob;f=sweet/spec.scm;hb=ae306867e371cb4b56e00bb60a50d9a0b8353109
(define-module (language wisp spec)
#:use-module (language wisp)
#:use-module (system base compile)
#:use-module (system base language)
#:use-module (language scheme compile-tree-il)
#:use-module (language scheme decompile-tree-il)
#:export (wisp))
;;;
;;; Language definition
;;;
(define (read-one-wisp-sexp port env)
;; Allow using "# foo" as #(foo).
;; Don't use the globally-acting read-hash-extend, because this
;; doesn't make much sense in parenthese-y (non-Wisp) Scheme.
;; Instead, use fluids to temporarily add the extension.
(with-fluids ((%read-hash-procedures (fluid-ref %read-hash-procedures)))
(read-hash-extend #\# (lambda args #\# ))
;; Read Wisp files as UTF-8, to support non-ASCII characters.
;; TODO: would be nice to support ';; coding: whatever' lines
;; like in parenthese-y Scheme.
(set-port-encoding! port "UTF-8")
(if (eof-object? (peek-char port))
(read-char port) ; return eof: we’re done
(let ((chunk (wisp-scheme-read-chunk port)))
(and (not (null? chunk)) ; <---- XXX: maybe (pair? chunk)
(car chunk))))))
(define-language wisp
#:title "Wisp Scheme Syntax. See SRFI-119 for details"
;; . #:reader read-one-wisp-sexp
#:reader read-one-wisp-sexp ; : lambda (port env) : let ((x (read-one-wisp-sexp port env))) (display x)(newline) x ;
#:compilers `((tree-il . ,compile-tree-il))
#:decompilers `((tree-il . ,decompile-tree-il))
#:evaluator (lambda (x module) (primitive-eval x))
#:printer write ; TODO: backtransform to Wisp? Use source-properties?
#:make-default-environment
(lambda ()
;; Ideally we'd duplicate the whole module hierarchy so that `set!',
;; `fluid-set!', etc. don't have any effect in the current environment.
(let ((m (make-fresh-user-module)))
;; Provide a separate `current-reader' fluid so that
;; compile-time changes to `current-reader' are
;; limited to the current compilation unit.
(module-define! m 'current-reader (make-fluid))
m)))
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