57 lines
1.9 KiB
Scheme
57 lines
1.9 KiB
Scheme
;;; Syntatic forms for R⁵RS Scheme
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;;;
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;;; Copyright (C) 2018 Mike Gerwitz
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;;;
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;;; This file is part of Ulambda Scheme.
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;;;
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;;; Ulambda Scheme is free software: you can redistribute it and/or modify
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;;; it under the terms of the GNU Affero General Public License as
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;;; published by the Free Software Foundation, either version 3 of the
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;;; License, or (at your option) any later version.
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;;;
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;;; This program is distributed in the hope that it will be useful,
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;;; but 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 Affero General Public License
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;;; along with this program. If not, see <http://www.gnu.org/licenses/>.
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;;;
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;;; These are syntatic forms suitable for use in `(null-environment 5)'.
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;;;
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;;; This will eventually be shared between Rebirth and Ulambda. It assumes
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;;; that macro support exists.
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;; convention: %% compiler internal
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(define-macro (%%apply-procedure proc-name . args))
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(define-macro (%%apply-?-procedure proc-name . args))
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(define-macro (%%apply-macro macro-name . args))
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(define-macro (%%apply-?-macro macro-name . args))
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(define-macro (lambda fnargs . body)
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(`quote
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(PROC (unquote fnargs) (unquote body))))
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(define-macro (let bindings . body)
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(if (empty? bindings)
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body
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(list (quote LET)
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(caar bindings)
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(cadr (car bindings))
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(let (cdr bindings) body))))
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(define-es-macro (let* bindings . body)
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"(function(){\n"
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(join "" (map (lambda (binding)
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(string-append
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"let " (tparam->es (car binding)) ; TODO: BC; remove
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" = " (env-ref (car binding))
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" = " (sexp->es (cadr binding)) ";\n"))
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bindings))
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(body->es body #t) "\n"
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" })()")
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