On Tue, Sep 2, 2014 at 8:59 PM, Greg Wooledge <wool...@eeg.ccf.org> wrote: > On Sat, Aug 30, 2014 at 12:02:33PM +0800, lolilolicon wrote: >> > #!/bin/bash >> > declare var="hello world" >> > declare -n ref >> > ref=var >> > echo $ref >> > ref=var >> > echo $ref >> > >> > --- output --- >> > hello world >> > var > >> Ah, LOL I think I need some sleep. This is not a bug. Sorry for all the >> noise. > > For those trying to follow along, what's happening is the first time > "ref=var" is executed, ref becomes a reference to the variable var. > The second time "ref=var" is executed, ref is already a reference to a > variable, so the value "var" is assigned to the variable "var". > > imadev:~$ declare -n ref=var1 > imadev:~$ var1=old > imadev:~$ declare -p ref var1 > declare -n ref="var1" > declare -- var1="old" > imadev:~$ ref=new > imadev:~$ declare -p ref var1 > declare -n ref="var1" > declare -- var1="new" >
Indeed this seems worth adding to the Greg's Wiki!
