Hi, I've attached a version of static_assert.hpp that I would find rather useful. The minimal changes are at the bottom of the file.
It also had me thinking about the static_assert proposal: http://anubis.dkuug.dk/jtc1/sc22/wg21/docs/papers/2002/n1381.htm The proposal doesn't say anything about a compile time release and debug mode. I guess one could always define the 'static_assert' keyword to be nothing, but perhaps compiler support for disabling and enabling static assertions is more useful. Then again, maybe I'm exagerating the usefulness of this. Personally I do notice a compilation time improvement if I remove all concept-checks, but that could be my code of course :). 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