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0ba8bb7143
* module/system/vm/program.scm (program-bindings-as-lambda-list): Handle the bindings-is-null case too -- not sure how it comes about, though. A thunk with no let, perhaps. (write-program): Another default for the name: the source location at which it was defined. * libguile/programs.c (program_print): Add some "logic" to stop doing detailed prints if one print had a nonlocal exit -- preventing exceptions in backtraces.
98 lines
3.2 KiB
Scheme
98 lines
3.2 KiB
Scheme
;;; Guile VM program functions
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;;; Copyright (C) 2001 Free Software Foundation, Inc.
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;;; Copyright (C) 2005 Ludovic Courtès <ludovic.courtes@laas.fr>
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;;;
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;;; This program is free software; you can redistribute it and/or modify
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;;; it under the terms of the GNU General Public License as published by
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;;; the Free Software Foundation; either version 2 of the License, or
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;;; (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 General Public License
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;;; along with this program; if not, write to the Free Software
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;;; Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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;;; Code:
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(define-module (system vm program)
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#:export (arity:nargs arity:nrest arity:nlocs arity:nexts
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make-binding binding:name binding:extp binding:index
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source:addr source:line source:column source:file
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program-bindings program-sources
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program-properties program-property program-documentation
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program-name
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program-arity program-external-set! program-meta
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program-bytecode program? program-objects
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program-module program-base program-external))
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(dynamic-call "scm_init_programs" (dynamic-link "libguile"))
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(define arity:nargs car)
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(define arity:nrest cadr)
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(define arity:nlocs caddr)
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(define arity:nexts cadddr)
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(define (make-binding name extp index)
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(list name extp index))
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(define binding:name car)
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(define binding:extp cadr)
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(define binding:index caddr)
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(define (curry1 proc)
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(lambda (x) (proc (x))))
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(define (program-bindings prog)
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(cond ((program-meta prog) => (curry1 car))
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(else #f)))
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(define (source:addr source)
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(car source))
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(define (source:line source)
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(vector-ref (cdr source) 0))
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(define (source:column source)
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(vector-ref (cdr source) 1))
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(define (source:file source)
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(vector-ref (cdr source) 2))
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(define (program-sources prog)
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(cond ((program-meta prog) => (curry1 cadr))
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(else '())))
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(define (program-properties prog)
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(or (and=> (program-meta prog) (curry1 cddr))
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'()))
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(define (program-property prog prop)
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(assq-ref (program-properties proc) prop))
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(define (program-documentation prog)
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(assq-ref (program-properties prog) 'documentation))
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(define (program-name prog)
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(assq-ref (program-properties prog) 'name))
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(define (program-bindings-as-lambda-list prog)
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(let ((bindings (program-bindings prog))
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(nargs (arity:nargs (program-arity prog)))
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(rest? (not (zero? (arity:nrest (program-arity prog))))))
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(if (or (null? bindings) (not bindings))
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(if rest? (cons (1- nargs) 1) (list nargs))
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(let ((arg-names (map binding:name (cdar bindings))))
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(if rest?
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(apply cons* arg-names)
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arg-names)))))
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(define (write-program prog port)
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(format port "#<program ~a ~a>"
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(or (program-name prog)
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(let ((s (program-sources prog)))
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(and (not (null? s)) (cdar s)))
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(number->string (object-address prog) 16))
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(program-bindings-as-lambda-list prog)))
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