149 lines
5.0 KiB
Scheme
149 lines
5.0 KiB
Scheme
;;; -*-scheme-*-
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;;; Mes --- Maxwell Equations of Software
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;;; Copyright © 2016 Jan Nieuwenhuizen <janneke@gnu.org>
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;;;
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;;; This file is part of Mes.
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;;;
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;;; Mes is free software; you can redistribute it and/or modify it
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;;; 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 (at
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;;; your option) any later version.
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;;;
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;;; Mes is distributed in the hope that it will be useful, but
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;;; 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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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with Mes. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;;; base-0.mes is the first file being loaded from the Mes core. It
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;;; provides primitives that use Mes internals to create the illusion
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;;; of compatibility with Guile. It is not safe to be run by Guile.
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;;; Code:
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#f ;; FIXME -- needed for --dump, then --load
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(define (primitive-eval e) (eval-env e (current-module)))
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(define eval eval-env)
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(define (expand-macro e) (expand-macro-env e (current-module)))
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(define quotient /)
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(define-macro (defined? x)
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(list 'assq x '(cddr (current-module))))
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(if (defined? 'current-input-port) #t
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(define (current-input-port) 0))
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(define (current-output-port) 1)
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(define (current-error-port) 2)
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(define (port-filename port) "<stdin>")
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(define (port-line port) 0)
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(define (port-column port) 0)
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(define (ftell port) 0)
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(define (false-if-exception x) x)
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(define (cons* x . rest)
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(define (loop rest)
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(if (null? (cdr rest)) (car rest)
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(cons (car rest) (loop (cdr rest)))))
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(loop (cons x rest)))
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(define (apply f h . t) (apply-env f (cons h t) (current-module)))
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(define (apply f h . t)
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(if (null? t) (apply-env f h (current-module))
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(apply f (apply cons* (cons h t)))))
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(define-macro (cond . clauses)
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(list 'if (pair? clauses)
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(list (cons
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'lambda
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(cons
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'(test)
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(list (list 'if 'test
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(if (pair? (cdar clauses))
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(if (eq? (cadar clauses) '=>)
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(append2 (cddar clauses) '(test))
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(list (cons 'lambda (cons '() (car clauses)))))
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(list (cons 'lambda (cons '() (car clauses)))))
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(if (pair? (cdr clauses))
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(cons 'cond (cdr clauses)))))))
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(car (car clauses)))))
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(define else #t)
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(define (map f l . r)
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(if (null? l) '()
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(if (null? r) (cons (f (car l)) (map f (cdr l)))
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(if (null? (cdr r))
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(cons (f (car l) (caar r)) (map f (cdr l) (cdar r)))))))
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(define-macro (simple-let bindings . rest)
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(cons (cons 'lambda (cons (map car bindings) rest))
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(map cadr bindings)))
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(define-macro (let bindings . rest)
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(cons 'simple-let (cons bindings rest)))
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(define *input-ports* '())
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(define-macro (push! stack o)
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(cons
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'begin
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(list
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(list 'set! stack (list cons o stack))
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stack)))
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(define-macro (pop! stack)
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(list 'let (list (list 'o (list car stack)))
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(list 'set! stack (list cdr stack))
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'o))
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(define-macro (load file)
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(list 'begin
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(list 'push! '*input-ports* (list current-input-port))
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(list 'set-current-input-port (list open-input-file file))
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(list 'primitive-load)
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(list 'set-current-input-port (list 'pop! '*input-ports*))))
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(define (memq x lst)
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(if (null? lst) #f
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(if (eq? x (car lst)) lst
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(memq x (cdr lst)))))
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(define (string-join lst infix)
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(if (null? (cdr lst)) (car lst)
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(string-append (car lst) infix (string-join (cdr lst) infix))))
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(define *mes-prefix* "module/")
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(define (module->file o)
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(string-append (string-join (map symbol->string o) "/") ".mes"))
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(define *modules* '(mes/base-0.mes))
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(define (mes-load-module-env module a)
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(push! *input-ports* (current-input-port))
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(set-current-input-port (open-input-file (string-append *mes-prefix* (module->file module))))
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(let ((x (eval-env (append (cons 'begin (read-input-file-env #f a))
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'((current-module)))
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a)))
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(set-current-input-port (pop! *input-ports*))
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x))
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(define (not x)
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(if x #f #t))
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(define-macro (mes-use-module module)
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(list
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'begin
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(list 'if (list 'not (list 'memq (list string->symbol (module->file module)) '*modules*))
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(list
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'begin
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(list 'set! '*modules* (list cons (list string->symbol (module->file module)) '*modules*))
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;; (list display "loading file=" (list current-error-port))
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;; (list display (module->file module) (list current-error-port))
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;; (list newline (list current-error-port))
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(list 'load (list string-append '*mes-prefix* (module->file module)))))))
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(mes-use-module (srfi srfi-0))
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(mes-use-module (mes base))
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(mes-use-module (mes scm))
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