Re: [boost] [Serliazation] Thread-safety again

From: David Abrahams (dave_at_[hidden])
Date: 2007-01-03 23:48:03

"Robert Ramey" <ramey_at_[hidden]> writes:

> All combinations of A and T actually used - and only those combinations -
> are used to instantiate code.  

I don't think that can be true for any reasonable definition of
"used."  Code in one TU can't tell what other TUs are doing, so the
code is instantiated for all archives whose headers have been
included.  IIRC it gets around the ordering problems you were having
before by doing the instantiation as the result of overload resolution
on an unqualified call, which happens in phase 2 and thus doesn't
depend on having seen the overload for a particular archive type
before the serializable type is EXPORTed.  It doesn't do any other
deep magic, IIRC.

-- 
Dave Abrahams
Boost Consulting
www.boost-consulting.com