Re: [boost] Some statistics about the C++ 11/14 mandatoryBoostlibraries

Niall Douglas wrote:

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APIBind enables you to bind a copy of function<> into your library's namespace e.g.

namespace boost { namespace foo { template using function = std::function; } }

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Indeed, APIBind is there to ensure that your library X built against boost::function doesn't collide with your library X build against std::function in the same translation unit.

Does this actually work? Because I've trouble visualizing it based on this description. OK, X built against boost::function has namespace boost { namespace foo { template using function = boost::function; } } and X built against std::function has namespace boost { namespace foo { template using function = std::function; } } Why do those two not clash? I'm not seeing it. Perhaps the two 'foo' namespaces are actually different? But if so, does this not lead to a combinatorial explosion when more than one component can use either its Boost or standard version? function, bind, shared_ptr, regex... that's 16 combinations so far.