🚀 go-pugleaf

David Byrden <100101.2547@compuserve.com> wrote:
> 
> >> I'd like to be able to call "DoIt" with any type of object and a
> >> pointer to any of that object's member functions that match the
> >> 'parmlist'
> 
>  In the C++ Report, February 1995, Richard Hickey suggested a library of
> universal callback functors which would encapsulate both an object
> reference and a pointer to a member function of that object.
> 
>  The caller, and the provider of the callback, would not have to share
> any type information other than the callback library itself.

Unfortunately the implementation is all but clean, and depends
heavily on the compiler used. Internally, everything is
casted to void*. When I tried the implementation on Sun SparcWorks,
it failed, since pointer to member functions cannot be casted
to void* without severe loss of precision (they're twise
as long as void*.)

The ideas are still usable, though. Those who are interested
can e-mail me for a simple example (not quite as slick as the
original, but not compiler dependant since it doesn't use
ugly casts.)
   _
/Bjorn.
--
Bjorn Fahller                  Tel: +46 8 4220898 / 
NA/EBC/F/SNM/T                 -------------------            ^
Ericsson Business Networks AB /                               |
S-131 89 Stockholm/SWEDEN    / Clever quote goes right here --+
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