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Subject: Re: [boost] determine first arg of callable
From: Nathan Ridge (zeratul976_at_[hidden])
Date: 2013-05-16 03:22:48

>>> No, bind function object types do not have the argument types. These >> types >>> are not known until the function object is actually invoked. The only >> types >>> you will find is the bound function object type and bound argument values >>> types (and the latter may differ from the actual argument types, BTW). >> >> This is an aside, but is there a way, given the result of a bind(), to >> get the types of the bound argument values? >> > > For boost::bind you can use visit_each [1] or decompose the bind_t template > type manually. Both ways are not quite documented, but it is doable. For > other bind implementations the code may differ but the same types should be > present in some form in the function object type. > > [1] Interesting, thanks! Do you know of a (standard) way to do it for std::bind? Thanks, Nate

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