From c17054aa390ce42e867d9ce7b5fd821e0c666d45 Mon Sep 17 00:00:00 2001
From: Kaz Kylheku <kaz@kylheku.com>
Date: Mon, 5 Oct 2015 06:17:31 -0700
Subject: Copy lazy strings without forcing.

* lib.c (copy_lazy_str): New static function.
(copy_str): Use copy_lazy_str to copy lazy strings.

* txr.1: Documentation added under copy-str.
---
 txr.1 | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 'txr.1')

diff --git a/txr.1 b/txr.1
index 309b5d8b..f8d2dd89 100644
--- a/txr.1
+++ b/txr.1
@@ -16133,6 +16133,18 @@ function constructs a new string whose contents are identical
 to
 .metn string .
 
+If
+.meta string
+is a lazy string, then a lazy string is constructed with the
+same attributes as
+.metn string .
+The new lazy string has its own copy of the prefix portion of
+.meta string
+which has been forced so far. The unforced list and separator
+string are shared between
+.meta string
+and the newly constructed lazy string.
+
 .coNP Function @ upcase-str
 .synb
 .mets (upcase-str << string )
-- 
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