[Xotcl] poll for opinions

[Zoran Vasiljevic]

On Thursday 21 February 2002 18:17, Zoran Vasiljevic wrote:
>
> Class foo
> foo instproc init {args} {
>     puts stderr "[self] comming"
>     next
> }
> foo instproc destroy {args} {
>     puts stderr "[self] leaving"
>     next
> }
> foo instproc test {args} {
>     puts "Hallo World"
> }
> proc dummy {args} {
>     foo private fooVar  ; # "private" might be a new constructor method
>     $fooVar test
>     return
> }
>
> When somebody calls "dummy" proc, a new "foo" object gets created
> (the "private" method" and automatically destroyed when proc returns.
> Can such thing be done with simple Tcl variable traces, hm?
>
>

Hm, what about this little baby:

proc ::xotcl::gc {name1 name2 op} {
    ::uplevel $name1 destroy
}

Class instproc private {varname args} {
  ::upvar $varname v
  ::set v $varname
  ::uplevel trace variable $varname u ::xotcl::gc
  ::eval [self] create $varname $args
}

Yields...

% Class foo
% foo private bar
% $bar
wrong # args: should be {bar message ?args...?}
% set bar
::bar
% unset bar
% ::bar 
invalid command name "::bar"


Cheer's
Zoran