On 25/06/2008, Roland Mainz <[EMAIL PROTECTED]> wrote:
> "I. Szczesniak" wrote:
> > On 6/25/08, Cedric Blancher <[EMAIL PROTECTED]> wrote:
> > > Does ksh have a way to copy shell functions? I have to write a script
> > > which has to add a discipline function to variables loaded from a file
> > > via . (which is the output of another application and can't be
> > > changed) and the number goes into the tens of thousands.
> > > I'm using eval "function ${var}.get { $function }" but this is slow
> > > and uses much memory per variable ($function contains 400 bytes of
> > > script code) and the system has only memory for 128MB.
> >
> > Try this:
> >
> > function function_common
> > {
> > $function
> > }
> >
> > eval "function ${var}.get { function_common \"[EMAIL PROTECTED]" }"
>
>
> IMO it may be nice to think about the old idea for "nameref for
> functions", e.g. "nameref -f funcptr = myfunction" or "function -n
> funcptr = myfunction". The case above (and many other complex issues
> related to get/set/unset functions and other cases where C/C++/JAVA code
> would use function pointers) could be reduced to a simple "function
> pointer (or better: nameref) assignment".
>
> The example above could then be reduced to:
> -- snip --
> function function_common
> {
> $function
> }
>
> eval "function -n ${var}.get = function_common"
> -- snip --
>
> ... and this would even be faster since we could replace the whole {
> argument expansion pass for "$@" + the function call itself } with a
> direct function call through the function nameref... and it may save
> some memory since no wrapper functions (e.g. the wrapper which calls
> "function_common" in Irek's example) need to be created.
Do you have an example which works?
function x
{
print x
}
nameref -f y=x
y
returns:
Usage: typeset [-bflnprstuxACHS] [-a[type]] [-i[base]] [-E[n]] [-F[n]]
[-L[n]] [-R[n]] [-X[n]] [-h string] [-T tname] [-Z[n]]
[name[=value]...]
Or:[name[=value]...]
typeset[name[=value]...]
[[name[=value]...]
options[name[=value]...]
] -f [name...]
(ksh 20080624, Fedora 8, i586)
--
Cedric Blancher <[EMAIL PROTECTED]>
Institute Pasteur
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