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-rw-r--r--doc/ref/api-data.texi3
-rw-r--r--doc/ref/api-utility.texi15
2 files changed, 11 insertions, 7 deletions
diff --git a/doc/ref/api-data.texi b/doc/ref/api-data.texi
index ed14b2298..2ad13f5a5 100644
--- a/doc/ref/api-data.texi
+++ b/doc/ref/api-data.texi
@@ -5924,7 +5924,8 @@ that modifying the elements of the new list also modifies the elements
of the old list. On the other hand, applying procedures like
@code{set-cdr!} or @code{delv!} to the new list will not alter the old
list. If you also need to copy the list elements (making a deep copy),
-use the procedure @code{copy-tree} (@pxref{Copying}).
+use the procedure @code{copy-tree} from @code{(ice-9 copy-tree)}
+(@pxref{Copying}).
@node List Selection
@subsubsection List Selection
diff --git a/doc/ref/api-utility.texi b/doc/ref/api-utility.texi
index d82d31a48..5c0142940 100644
--- a/doc/ref/api-utility.texi
+++ b/doc/ref/api-utility.texi
@@ -1,6 +1,6 @@
@c -*-texinfo-*-
@c This is part of the GNU Guile Reference Manual.
-@c Copyright (C) 1996, 1997, 2000, 2001, 2002, 2003, 2004, 2011, 2012, 2013, 2014
+@c Copyright (C) 1996, 1997, 2000, 2001, 2002, 2003, 2004, 2011, 2012, 2013, 2014, 2020
@c Free Software Foundation, Inc.
@c See the file guile.texi for copying conditions.
@@ -378,13 +378,16 @@ is not specified.
@node Copying
@subsection Copying Deep Structures
-@c FIXME::martin: Review me!
-
The procedures for copying lists (@pxref{Lists}) only produce a flat
copy of the input list, and currently Guile does not even contain
-procedures for copying vectors. @code{copy-tree} can be used for these
-application, as it does not only copy the spine of a list, but also
-copies any pairs in the cars of the input lists.
+procedures for copying vectors. The @code{(ice-9 copy-tree)} module
+contains a @code{copy-tree} function that can be used for this purpose,
+as it does not only copy the spine of a list, but also copies any pairs
+in the cars of the input lists.
+
+@example
+(use-modules (ice-9 copy-tree))
+@end example
@deffn {Scheme Procedure} copy-tree obj
@deffnx {C Function} scm_copy_tree (obj)