Re: [Boost-bugs] [Boost C++ Libraries] #11602: boost.variant constructor accepts any type as parameter

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #11602: boost.variant constructor accepts any type as parameter
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2015-09-01 08:31:17

#11602: boost.variant constructor accepts any type as parameter
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  Reporter:  piotrwn1@…        |      Owner:  ebf
      Type:  Bugs              |     Status:  new
 Milestone:  To Be Determined  |  Component:  variant
   Version:  Boost 1.58.0      |   Severity:  Problem
Resolution:                    |   Keywords:
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Comment (by piotrwn1@…):

 Maybe better would to use IsConvertibleToAnyOf instead of IsAnyOf:


 {{{
 template <typename T, typename ...C>
 struct IsConvertibleToAnyOf;

 template <typename T>
 struct IsConvertibleToAnyOf<T> : std::false_type {};


 template <typename T, typename C1, typename ...C>
 struct IsConvertibleToAnyOf<T,C1,C...> : std::integral_constant<bool,
     std::is_convertible<T,C1>::value or
     IsConvertibleToAnyOf<T,C...>::value> {};
 }}}

 BR,

 Piotr Nycz

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/11602#comment:1>
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