From 7d6a248f2c68d70f58387afc69e73e695c3d940c Mon Sep 17 00:00:00 2001
From: Russ Cox <rsc@swtch.com>
Date: Mon, 4 May 2020 23:20:08 -0400
Subject: rc: move free carat handling into parser

This fixes at least one shell script (printfont) that expected

	'x'`{y}'z'

to mean

	'x'^`{y}^'z'

as it now does. Before it meant:

	'x'^`{y} 'z'

One surprise is that adjacent lists get a free carat:

	(x y z)(1 2 3)

is

	(x1 y2 z3)

This doesn't affect any rc script in Plan 9 or plan9port.
---
 src/cmd/rc/test.rc | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'src/cmd/rc/test.rc')

diff --git a/src/cmd/rc/test.rc b/src/cmd/rc/test.rc
index 5c658132..7a83ad17 100644
--- a/src/cmd/rc/test.rc
+++ b/src/cmd/rc/test.rc
@@ -1,5 +1,9 @@
 # test for parser
 
+a
+a b
+a|b
+a | b
 {a; b; c}
 x=y a && b || c
 x=y a | b | c
@@ -63,3 +67,10 @@ x ||
 y
 x |
 y
+switch x {y} && z
+switch x {} | y
+
+OPTIONS=$OPTIONS' /axescount '^`{echo $1 | sed s/-a//}^' def'
+
+# bug in old printfont script - expected more free carats
+# OPTIONS=$OPTIONS' /axescount '`{echo $1 | sed s/-a//}' def'
-- 
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