extern template in V3 (was: Re: GCC viciously beaten...)

[Gabriel Dos Reis]

Paolo Carlini <pcarlini@suse.de> writes:

| Wasting compile time in redundant instantiations may be also an important
| concern, right?

Yes.

| Another, more practical, curiosity I have is the following: now I'm
| also reading
| the manual about extern template and it talks about "to allow forward
| declaration
| of explicit instantiations",

Yes  that is what I meant by:

>  (2) In the current proposal for "extern template", it is just a way
>      to tell the compiler not to instantiate right now from an
>      arbitraty template definition that would be around.  It is
>      essentially a mean to forward declare an explicit instantiation.

| however, I'm not at all sure that *all* the instantiations
| suppressed via extern have a corresponding *explicit* instantiation
| somewhere!

I did no audit trail, but I think if we missed one we would have heard
of it :-)

-- Gaby