On Tue, Mar 10, 2009 at 6:58 AM, Sylvain Pion <sylvain.p...@sophia.inria.fr> wrote: > Manuel López-Ibáñez wrote: >> >> 2009/3/10 Sylvain Pion <sylvain.p...@sophia.inria.fr>: >>> >>> The problem I fear is that variadic templates are already conveniently >>> used as an implementation detail in libstdc++. And the warning there >>> is probably hidden by the "system header" warning removal machinery. >> >> But then probably, variadic templates are implemented as a GCC >> extension to C++98 and they work fine with -std=c++98 despite what the >> warning says. Or don't they? > > Yes, but like any extension, it's nice to be able to disable them > as errors, so as to be able to use GCC for checking code portability.
libstdc++ ought to be able to use GNU extensions that make the implemnentation easier. Consequently, I do not see the complete removal of variadic templates under -stdc=c++98 as an option. However, people can propose patch to make extensions non-available outside system headers. -- Gaby
