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| author | jilles <jilles@FreeBSD.org> | 2013-08-24 20:06:00 +0000 |
|---|---|---|
| committer | jilles <jilles@FreeBSD.org> | 2013-08-24 20:06:00 +0000 |
| commit | f53205fcfa3664184b4a8f18b12f4911f2a948d3 (patch) | |
| tree | cb40b1e737f1acc1fb9ee6c30f13f59b96a6b780 /tools/regression | |
| parent | 84e882b514859c4085e7ee92058b4cbc4de7d597 (diff) | |
| download | FreeBSD-src-f53205fcfa3664184b4a8f18b12f4911f2a948d3.zip FreeBSD-src-f53205fcfa3664184b4a8f18b12f4911f2a948d3.tar.gz | |
sh: Reject ++ and -- in arithmetic.
POSIX does not require ++ and -- in arithmetic. It is probably more useful
to reject them than to treat ++x and --x as x silently.
Note that the behaviour of increment and decrement can be obtained via
(x+=1), ((x+=1)-1), (x-=1) and ((x-=1)+1).
PR: bin/176444
Diffstat (limited to 'tools/regression')
| -rw-r--r-- | tools/regression/bin/sh/expansion/arith13.0 | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/tools/regression/bin/sh/expansion/arith13.0 b/tools/regression/bin/sh/expansion/arith13.0 new file mode 100644 index 0000000..207e488 --- /dev/null +++ b/tools/regression/bin/sh/expansion/arith13.0 @@ -0,0 +1,6 @@ +# $FreeBSD$ +# Pre-increment and pre-decrement in arithmetic expansion are not in POSIX. +# Require either an error or a correct implementation. + +! (eval 'x=4; [ $((++x)) != 5 ] || [ $x != 5 ]') 2>/dev/null && +! (eval 'x=2; [ $((--x)) != 1 ] || [ $x != 1 ]') 2>/dev/null |
