141 lines
3.6 KiB
Scheme
141 lines
3.6 KiB
Scheme
;;; -*-scheme-*-
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;;; Mes --- Maxwell Equations of Software
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;;; Copyright © 2016,2017,2018 Jan (janneke) 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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;;; Implement core functionality that depends on implementation
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;;; specifics of Mes cell types.
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;;; Code:
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(define cell:type-alist
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(list (cons <cell:char> (quote <cell:char>))
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(cons <cell:closure> (quote <cell:closure>))
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(cons <cell:continuation> (quote <cell:continuation>))
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(cons <cell:function> (quote <cell:function>))
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(cons <cell:keyword> (quote <cell:keyword>))
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(cons <cell:macro> (quote <cell:macro>))
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(cons <cell:number> (quote <cell:number>))
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(cons <cell:pair> (quote <cell:pair>))
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(cons <cell:ref> (quote <cell:ref>))
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(cons <cell:special> (quote <cell:special>))
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(cons <cell:string> (quote <cell:string>))
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(cons <cell:symbol> (quote <cell:symbol>))
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(cons <cell:values> (quote <cell:values>))
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(cons <cell:variable> (quote <cell:variable>))
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(cons <cell:vector> (quote <cell:vector>))
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(cons <cell:broken-heart> (quote <cell:broken-heart>))))
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(define (cell:type-name x)
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(cond ((assq (core:type x) cell:type-alist) => cdr)))
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(define (char? x)
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(and (eq? (core:type x) <cell:char>)
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(> (char->integer x) -1)))
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(define (eof-object? x)
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(and (eq? (core:type x) <cell:char>)
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(= (char->integer x) -1)))
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(define (closure? x)
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(eq? (core:type x) <cell:closure>))
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(define (continuation? x)
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(eq? (core:type x) <cell:continuation>))
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(define (function? x)
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(eq? (core:type x) <cell:function>))
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(define builtin? function?)
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(define (keyword? x)
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(eq? (core:type x) <cell:keyword>))
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(define (macro? x)
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(eq? (core:type x) <cell:macro>))
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(define (number? x)
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(eq? (core:type x) <cell:number>))
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(define (pair? x)
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(eq? (core:type x) <cell:pair>))
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(define (port? x)
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(eq? (core:type x) <cell:port>))
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(define (special? x)
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(eq? (core:type x) <cell:special>))
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(define (string? x)
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(eq? (core:type x) <cell:string>))
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(define (symbol? x)
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(eq? (core:type x) <cell:symbol>))
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(define (values? x)
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(eq? (core:type x) <cell:values>))
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(define (variable? x)
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(eq? (core:type x) <cell:variable>))
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(define (variable-global? x)
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(core:cdr x))
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(define (vector? x)
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(eq? (core:type x) <cell:vector>))
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;; Non-types
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;; In core
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;; (define (null? x)
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;; (eq? x '()))
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(define (atom? x)
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(not (pair? x)))
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(define (boolean? x)
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(or (eq? x #f) (eq? x #t)))
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;;; core: accessors
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(define (string . lst)
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(core:make-cell <cell:string> lst 0))
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(define (string->symbol s)
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(if (not (pair? (core:car s))) '()
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(core:lookup-symbol (core:car s))))
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(define (symbol->keyword s)
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(core:make-cell <cell:keyword> (symbol->list s) 0))
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(define (list->symbol lst)
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(core:lookup-symbol lst))
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(define (symbol->list s)
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(core:car s))
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(define (keyword->list s)
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(core:car s))
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(define (integer->char x)
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(core:make-cell <cell:char> 0 x))
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(define (char->integer x)
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(core:make-cell <cell:number> 0 x))
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