Re: [boost] Boost 1_58_0_b1_rc2 is available for testing

[Steven Watanabe]

So is it more important to match std::function or to avoid breaking existing code?

That's your call. Over in the Standard Library, I ruthlessly deliver conformance and breaking changes (especially at compile-time like this). Note that this affects signatures like function, which work for std::function. In general, my motto is that INVOKE is scary, so I should do exactly what it says, so INVOKE gets all the blame if users are unhappy. (It's actually well-designed, just deeply scary.) STL