Configuration Information [Automatically generated, do not change]:
Machine: x86_64
OS: linux-gnu
Compiler: x86_64-pc-linux-gnu-gcc
Compilation CFLAGS: -DPROGRAM='bash' -DCONF_HOSTTYPE='x86_64'
-DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='x86_64-pc-linux-gnu'
-DCONF_VENDOR='pc' -DLOCALEDIR
uname output: Linux diegom 2.6.34-gentoo-r12 #1 SMP Mon Nov 29 06:02:02
ART 2010 x86_64 Intel(R) Pentium(R) Dual CPU T2330 @ 1.60GHz
GenuineIntel GNU/Linux
Machine Type: x86_64-pc-linux-gnu
Bash Version: 4.1
Patch Level: 7
Release Status: release
Description:
It's difficult to explain. Better see below the particular case I had.
I needed to assign the elements of an array to other, but with a preceding
single quote. The following is a simplified (yet illustrative) example.
declare -a array1=(a b c d e f) array2=()
array2=( "${array1[@]/#/'}" )
AFAIK (plus the man page), the syntax of pattern substitution is
${parameter/pattern/string}, where "string" is just that, a string. I
have also
tried the following:
array2=( "${array1[@]/#/"'"}" )
But that caused a literal preceding "'", which technically is ok.
The ugly solution I had to take was a for loop. Nothing stressing but
bothers.
BASH shouldn't have treated specially the single quote after the slash and
before the closing brace (I think).
Actual Results:
Nothing actually, just the PS2 wating for a closing single quote.
Expected Results:
'a 'b 'c 'd 'e 'f
Repeat-By:
(Always Reproducible.)
declare -a my_array=(a b c d e)
echo "${my_array[@]/#/'}"
Fix:
None really, but two workarounds:
1) Using a for loop.
2) Declaring a variable, assigning it a single quote and expanding it
in the
"string" part of the substitution:
$ q="'"
$ echo "${my_array[@]/#/$q}"
(Proposed by Ulrich Müller)
This is discussed in Gentoo's bugzilla in bug #356403
--
Diego Augusto Molina
diegoaugustomol...@gmail.com
