Re: [boost] Generalized concept usage in Boost libraries

David Abrahams wrote:

There is the potential to increase compile times. But if we made it possible to switch it on and off, that would mitigate.

What about only enabling concept-checking when a kind of compile-time debug mode is enabled? Would there be a nice way to integrate that with Boost.Build? (since it makes more sense to me to enable if from the bjam invocation directly instead of a Jamfile)