X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=guile18%2Fice-9%2Fls.scm;fp=guile18%2Fice-9%2Fls.scm;h=e848be32af880d6f00e8119bc8f5bb468cfc5adb;hb=139c38d9204dd07f6b235f83bae644faedbc63fd;hp=0000000000000000000000000000000000000000;hpb=652ed35a2013489d0a14fede6307cd2595abb2c4;p=lilypond.git

diff --git a/guile18/ice-9/ls.scm b/guile18/ice-9/ls.scm
new file mode 100644
index 0000000000..e848be32af
--- /dev/null
+++ b/guile18/ice-9/ls.scm
@@ -0,0 +1,96 @@
+;;;; ls.scm --- functions for browsing modules
+;;;;
+;;;; 	Copyright (C) 1995, 1996, 1997, 1999, 2001, 2006 Free Software Foundation, Inc.
+;;;; 
+;;;; This library is free software; you can redistribute it and/or
+;;;; modify it under the terms of the GNU Lesser General Public
+;;;; License as published by the Free Software Foundation; either
+;;;; version 2.1 of the License, or (at your option) any later version.
+;;;; 
+;;;; This library is distributed in the hope that it will be useful,
+;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+;;;; Lesser General Public License for more details.
+;;;; 
+;;;; You should have received a copy of the GNU Lesser General Public
+;;;; License along with this library; if not, write to the Free Software
+;;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+;;;; 
+
+(define-module (ice-9 ls)
+  :use-module (ice-9 common-list)
+  :export (local-definitions-in definitions-in ls lls
+	   recursive-local-define))
+
+;;;;
+;;;	local-definitions-in root name
+;;;		Returns a list of names defined locally in the named
+;;;		subdirectory of root.
+;;;	definitions-in root name
+;;;		Returns a list of all names defined in the named
+;;;		subdirectory of root.  The list includes alll locally
+;;;		defined names as well as all names inherited from a
+;;;		member of a use-list.
+;;;
+;;; A convenient interface for examining the nature of things:
+;;;
+;;;	ls . various-names
+;;;
+;;;		With no arguments, return a list of definitions in
+;;;		`(current-module)'.
+;;;
+;;;		With just one argument, interpret that argument as the
+;;;		name of a subdirectory of the current module and
+;;;		return a list of names defined there.
+;;;
+;;;		With more than one argument, still compute
+;;;		subdirectory lists, but return a list:
+;;;			((<subdir-name> . <names-defined-there>)
+;;;			 (<subdir-name> . <names-defined-there>)
+;;;			 ...)
+;;;
+;;;     lls . various-names
+;;;
+;;;		Analogous to `ls', but with local definitions only.
+
+(define (local-definitions-in root names)
+  (let ((m (nested-ref root names))
+	(answer '()))
+    (if (not (module? m))
+	(set! answer m)
+	(module-for-each (lambda (k v) (set! answer (cons k answer))) m))
+    answer))
+
+(define (definitions-in root names)
+  (let ((m (nested-ref root names)))
+    (if (not (module? m))
+	m
+	(reduce union
+		(cons (local-definitions-in m  '())
+		      (map (lambda (m2) (definitions-in m2 '()))
+			   (module-uses m)))))))
+
+(define (ls . various-refs)
+  (if (pair? various-refs)
+       (if (cdr various-refs)
+	   (map (lambda (ref)
+		  (cons ref (definitions-in (current-module) ref)))
+		various-refs)
+	  (definitions-in (current-module) (car various-refs)))
+      (definitions-in (current-module) '())))
+
+(define (lls . various-refs)
+  (if (pair? various-refs)
+       (if (cdr various-refs)
+	   (map (lambda (ref)
+		  (cons ref (local-definitions-in (current-module) ref)))
+		various-refs)
+	  (local-definitions-in (current-module) (car various-refs)))
+      (local-definitions-in (current-module) '())))
+
+(define (recursive-local-define name value)
+  (let ((parent (reverse! (cdr (reverse name)))))
+    (and parent (make-modules-in (current-module) parent))
+    (local-define name value)))
+
+;;; ls.scm ends here