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TR1 and standard headers


My apologies if Benjamin or someone else has already answered this, but...

Have we decided on a policy yet for TR1 components that modify standard headers? TR1 defines extensions to <functional>, <utility>, and probably other headers that aren't coming to mind right now. (Not counting the C99 compatibility stuff, which affects all of the <c...> headers.)

I think we've got two sensible choices: edit the standard headers and control the extensions with a macro, or put shadow headers in include/tr1.

--Matt


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