From 5b1896c4098f71da3eeb88b8f45adaa10c3f0f5d Mon Sep 17 00:00:00 2001
From: Kaz Kylheku <kaz@kylheku.com>
Date: Tue, 29 Dec 2020 20:03:03 -0800
Subject: doc: note for awk macro fconv.

* txr.1: Add usage note to the fconv macro.
---
 txr.1 | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/txr.1 b/txr.1
index 1829471c..8f9260d4 100644
--- a/txr.1
+++ b/txr.1
@@ -58388,6 +58388,17 @@ The return value of
 is
 .codn f .
 
+Note: because
+.code f
+is
+.code nil
+when no fields have been extracted, a
+.code fconv
+expression can be used as the condition in an
+.code awk
+clause which triggers the action if one or more fields have been
+extracted, and performs conversions on them.
+
 .TP* Examples:
 
 .verb
-- 
cgit v1.2.3