[Boost-bugs] [Boost C++ Libraries] #12003: Implement is_constrructible<T, U> -- no variadics

Subject: [Boost-bugs] [Boost C++ Libraries] #12003: Implement is_constrructible<T, U> -- no variadics
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2016-02-19 00:05:51

#12003: Implement is_constrructible<T, U> -- no variadics
------------------------------+-------------------------
 Reporter:  akrzemi1          |      Owner:  johnmaddock
     Type:  Bugs              |     Status:  new
Milestone:  To Be Determined  |  Component:  type_traits
  Version:  Boost 1.61.0      |   Severity:  Problem
 Keywords:                    |
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 In the current implementation of trait boost::is_constructible, unless the
 compiler offers variadic templates (and some more), is implemented as
 boost::is_convertible, and that's it.

 I understand the limitations, but would it be possible to provide a more
 accurate version for the case with exactly two parameters:
 boost::is_constructible<T, U>. This would check the construction with a
 single argument, so it does not require variadic templates, and it would
 cover a significant number of use cases. For instance it would unblock my
 ticket:

 https://svn.boost.org/trac/boost/ticket/12002

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/12003>
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