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;;; 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))
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