On Wed, Jun 14, 2017 at 12:04:35PM -0400, tetsu...@scope-eye.net wrote:
> So first off, the circular reference problem with "declare -n"
> apparently doesn't exist in Korn Shell: If you "typeset -n x=$1", and
> $1 is "x", it's not a circular reference.
Korn shell actually has two different *kinds* of functions.
If you declare using: foo() { ...; }
Then you get bash-like behavior.
If you declare using: function foo { ...; }
Then it works as you described.
$ ksh
$ foo() { typeset -n x="$1"; x=y; }
$ x=global
$ foo x
ksh: typeset: x: invalid self reference
$ function bar { typeset -n x="$1"; x=y; }
$ bar x
$ echo "$x"
y
As far as I know, bash has no equivalent of ksh's "function foo"
declaration. Bash permits that *syntax* to be used as a function
declaration, but it has exactly the same semantics as "foo()".
> Regarding return values, there's a couple ways of looking at this:
> [...]
You're retracing a lot of the ground I've already covered in the last
few years. Which is cool, and I'll be happy if you find something
that I missed.
