diff options
Diffstat (limited to 'shell/ash_test/ash-vars/param_expand_alt.tests')
| -rwxr-xr-x | shell/ash_test/ash-vars/param_expand_alt.tests | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/shell/ash_test/ash-vars/param_expand_alt.tests b/shell/ash_test/ash-vars/param_expand_alt.tests index d804524..23e9a26 100755 --- a/shell/ash_test/ash-vars/param_expand_alt.tests +++ b/shell/ash_test/ash-vars/param_expand_alt.tests @@ -6,8 +6,13 @@ # now some funky ones. # ${V+word} "if V unset, then substitute nothing, else substitute word" # ${V:+word} "if V unset or '', then substitute nothing, else substitute word" -# bash doesn't accept ${#+}. ash prints 0 (not $#): "len of $+" -echo _${#+}_ _${#:+}_ +# +# ${#:+} is a :+ op on $#, but ${#+} (and any other ${#c}) is "length of $c", +# not + op on $#. +# bash and dash do not accept ${#+}. it's possible for some shell to skip +# the check that c is valid and interpret ${#+} as "len of $+". Not testing it. +# echo _${#+}_ +echo _${#:+}_ # Forms with non-empty word work as expected in both ash and bash. echo _${#+z}_ _${#:+z}_ |