[Boost-bugs] [Boost C++ Libraries] #10032: void container parameters not ignored with BOOST_INTRUSIVE_VARIADIC_TEMPLATES

Subject: [Boost-bugs] [Boost C++ Libraries] #10032: void container parameters not ignored with BOOST_INTRUSIVE_VARIADIC_TEMPLATES
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2014-05-09 23:14:29

#10032: void container parameters not ignored with
BOOST_INTRUSIVE_VARIADIC_TEMPLATES
------------------------------------------+------------------------
 Reporter:  Matei David <matei@…>         |      Owner:  igaztanaga
     Type:  Feature Requests              |     Status:  new
Milestone:  To Be Determined              |  Component:  intrusive
  Version:  Boost 1.55.0                  |   Severity:  Cosmetic
 Keywords:  variadic template parameters  |
------------------------------------------+------------------------
 When `BOOST_INTRUSIVE_VARIADIC_TEMPLATES` is used, `void` template
 parameters used to construct intrusive containers are not properly
 ignored, and instead cause compilation failure. E.g., `list< A, void > l`
 does not compile, but it compiles ok when that symbol is not defined.

 As one consequence, the library test suite cannot be compiled with that
 symbol defined, because tree-based containers in the test suite are built
 with `void` parameters.

 Technically, the issue rests with the `do_pack` struct in
 `pack_options.hpp`. In non-variadic context, `void`s are properly ignored.
 In the (heavy TMP) variadic context, they aren't.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/10032>
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