[Boost-bugs] [Boost C++ Libraries] #12155: variant does not support a class derived from variant as one of its types

Subject: [Boost-bugs] [Boost C++ Libraries] #12155: variant does not support a class derived from variant as one of its types
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2016-04-26 10:34:53

#12155: variant does not support a class derived from variant as one of its types
---------------------------------+---------------------
 Reporter:  Tobias Reh <treh@…>  |      Owner:  ebf
     Type:  Bugs                 |     Status:  new
Milestone:  To Be Determined     |  Component:  variant
  Version:  Boost 1.60.0         |   Severity:  Problem
 Keywords:                       |
---------------------------------+---------------------
 variant does not support a class derived from variant as one of its types.
 See the following example code:

 {{{#!c++
 struct A {};
 struct B {};
 struct C {};

 struct AB : boost::variant<A, B> {};

 using AB_C = boost::variant<AB, C>;

 void foo() {
     AB ab;
     AB_C ab_c{ab}; // member function convert_construct is abiguous
 }
 }}}

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/12155>
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