53 lines
1.6 KiB
Scheme
53 lines
1.6 KiB
Scheme
;;; utils.scm -- utility functions
|
|
|
|
;; Copyright (C) 2009, 2010, 2011 Jose Antonio Ortega Ruiz
|
|
|
|
;; This program is free software; you can redistribute it and/or
|
|
;; modify it under the terms of the Modified BSD License. You should
|
|
;; have received a copy of the license along with this program. If
|
|
;; not, see <http://www.xfree86.org/3.3.6/COPYRIGHT2.html#5>.
|
|
|
|
;; Start date: Mon Mar 02, 2009 01:48
|
|
|
|
(define-module (geiser utils)
|
|
#:export (make-location
|
|
symbol->object
|
|
pair->list
|
|
sort-symbols!
|
|
make-symbol-sort
|
|
gensym?)
|
|
#:use-module (ice-9 regex))
|
|
|
|
(define (symbol->object sym)
|
|
(and (symbol? sym)
|
|
(module-defined? (current-module) sym)
|
|
(module-ref (current-module) sym)))
|
|
|
|
(define (pair->list pair)
|
|
(let loop ((d pair) (s '()))
|
|
(cond ((null? d) (reverse! s))
|
|
((symbol? d) (reverse! (cons d s)))
|
|
(else (loop (cdr d) (cons (car d) s))))))
|
|
|
|
(define (make-location file line)
|
|
(list (cons "file" (if (string? file) file '()))
|
|
(cons "line" (if (number? line) (+ 1 line) '()))))
|
|
|
|
(define (sort-symbols! syms)
|
|
(let ((cmp (lambda (l r)
|
|
(string<? (symbol->string l) (symbol->string r)))))
|
|
(sort! syms cmp)))
|
|
|
|
(define (make-symbol-sort sel)
|
|
(let ((cmp (lambda (a b)
|
|
(string<? (symbol->string (sel a))
|
|
(symbol->string (sel b))))))
|
|
(lambda (syms)
|
|
(sort! syms cmp))))
|
|
|
|
(define (gensym? sym)
|
|
(and (symbol? sym) (gensym-name? (format #f "~A" sym))))
|
|
|
|
(define (gensym-name? name)
|
|
(and (string-match "^#[{]" name) #t))
|