libstdc++ not conforming with --enable-concepts-check?

[Paolo Carlini]

Nathan Myers wrote:

>Worthy?  That's up to whoever would do the work.
>
Disagree. I (we) want to know your specific opinion, then actually *doing*
the work is another thing... ;)

>  However, it seems 
>inconsistent to check so much else and fail to check these most 
>frequently-used library structures.
>  
>
Ok.

>Is this a good time to argue for making --enable-concept-checks the
>default configuration?  The distros can't really take that step 
>themselves.
>  
>
I see. I can report that the testsuite currently passes with concept checks
enabled. However, the last time (3.0 time frame?) it was decided to disable
concept checks not only for correctness, but also for compile-time
performance... We should probably benchmark again, but I'm not terribly
optimistic...

Paolo.