[Boost-bugs] [Boost C++ Libraries] #13114: Multiple signatures for function

Subject: [Boost-bugs] [Boost C++ Libraries] #13114: Multiple signatures for function
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2017-07-10 18:09:48

#13114: Multiple signatures for function
------------------------------+----------------------------
 Reporter:  stinkingmadgod@…  |      Owner:  Douglas Gregor
     Type:  Feature Requests  |     Status:  new
Milestone:  To Be Determined  |  Component:  function
  Version:  Boost 1.63.0      |   Severity:  Not Applicable
 Keywords:                    |
------------------------------+----------------------------
 I am not familiar with boost, just wanted to suggest the possibility of
 having `function` take multiple signatures

 {{{#!c++
 function<void (int), int (double)> f;
 }}}

 This is compatible with `std::function`, but unknown feasibility for
 `boost::function` in its current form.

 The key idea is to recursively implement `operator()` from the argument
 list

 {{{#!c++
 template<typename Ret, typename... Args, typename... Fns>
 struct erasure_base<Ret (Args...), Fns...> : erasure_base<Fns...>
 {
     virtual Ret operator()(Args&&...) = 0;
     using erasure_base<Fns...>::operator();
 };
 }}}

 Attached file is a proof-of-concept implementation of such functionality.

-- 
Ticket URL: <https://svn.boost.org/trac10/boost/ticket/13114>
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