From a06b95c052b4e70fe6fe61f7d90874fb6be00b56 Mon Sep 17 00:00:00 2001
From: Leah Neukirchen <leah@vuxu.org>
Date: Sat, 19 Nov 2022 17:23:53 +0100
Subject: add ok->, ok->>, err->, err->> to ->

---
 mew.svnwiki | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

(limited to 'mew.svnwiki')

diff --git a/mew.svnwiki b/mew.svnwiki
index 629d11b..e3cabdb 100644
--- a/mew.svnwiki
+++ b/mew.svnwiki
@@ -44,7 +44,8 @@ SRFI-158 (Generators and Accumulators),
 {{(chicken irregex)}},
 {{(chicken pretty-print)}}},
 {{(chicken sort)}}},
-and {{matchable}}.
+{{matchable}},
+and {{err}} (see {{err.svnwiki}}).
 
 
 == Definitions, bindings and assignments
@@ -540,3 +541,15 @@ Evaluate {{<val>}}.  Then, when {{<cond>}} is not false, behaves like
 
 Like {{->}}/{{->>}} but skips nesting the code if the nested
 expression is false.
+
+<syntax>(-> ... ok-> ...)<syntax>
+<syntax>(-> ... ok->> ...)<syntax>
+
+Like {{->}}/{{->>}} but skips nesting the code if the nested
+expression is {{err?}}.
+
+<syntax>(-> ... err-> ...)<syntax>
+<syntax>(-> ... err->> ...)<syntax>
+
+Like {{->}}/{{->>}} but skips nesting the code if the nested
+expression is {{ok?}}.  The unwrapped value is inserted into the nesting.
-- 
cgit 1.4.1