caf::composed_type< Xs, Ys, Zs, Rs > Struct Template Reference

Computes the type for f*g (actor composition). More...

Related Functions
(Note that these are not member functions.)
template<class F , class G >
using	composed_type_t = typename composed_type< G, F, F, detail::type_list<> >::type
	Convenience type alias.

Detailed Description

template<class Xs, class Ys, class Zs, class Rs>
struct caf::composed_type< Xs, Ys, Zs, Rs >

Computes the type for f*g (actor composition).

This metaprogramming function implements the following pseudo-code (with f and g modelled as pairs where the first element is the input type and the second type is the output type).

let composed_type f g =
  [(fst x, snd y) | x <- g, y <- f,
                    snd x == fst y]

This class implements the list comprehension above in a single shot with worst case n*m template instantiations using an inner and outer loop, where n is the size of Xs and m the size of Ys. Zs is a helper that models the "inner loop variable" for generating the cross product of Xs and Ys. Rs collects the results.

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The documentation for this struct was generated from the following file:

• libcaf_core/caf/composed_type.hpp