[Boost-bugs] [Boost C++ Libraries] #10844: flyweight: multiple default constructors with real perfect forwarding

Subject: [Boost-bugs] [Boost C++ Libraries] #10844: flyweight: multiple default constructors with real perfect forwarding
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2014-12-04 10:54:20

#10844: flyweight: multiple default constructors with real perfect forwarding
------------------------------+-----------------------
 Reporter:  tore.halvorsen@…  |      Owner:  joaquin
     Type:  Bugs              |     Status:  new
Milestone:  To Be Determined  |  Component:  flyweight
  Version:  Boost 1.57.0      |   Severity:  Cosmetic
 Keywords:                    |
------------------------------+-----------------------
 Flyweight gets two default constructors, since it has a direct default
 constructor

 {{{

 flyweight():h(core::insert()){}
 }}}


 and one based on variable template arguments, which can be zero.

 {{{

 #define BOOST_FLYWEIGHT_PERFECT_FWD_CTR_BODY(args) \
   :h(core::insert(BOOST_FLYWEIGHT_FORWARD(args))){}

   BOOST_FLYWEIGHT_PERFECT_FWD_WITH_ARGS(
     explicit flyweight,
     BOOST_FLYWEIGHT_PERFECT_FWD_CTR_BODY)

 #undef BOOST_FLYWEIGHT_PERFECT_FWD_CTR_BODY
 }}}

 which can expand to:

 {{{
 template<typename... Args>
 explicit flyweight(Args&&... args)
 :h(core::insert(std::forward<Args>(args)...)){}
 }}}

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/10844>
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