Re: [Boost-bugs] [Boost C++ Libraries] #6616: boost preprocessor bug in 1.49

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #6616: boost preprocessor bug in 1.49
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2013-01-04 15:07:10

#6616: boost preprocessor bug in 1.49
-------------------------------+--------------------------------------------
  Reporter:  sni4ok@…          |       Owner:  no-maintainer
      Type:  Bugs              |      Status:  new          
 Milestone:  To Be Determined  |   Component:  preprocessor 
   Version:  Boost 1.49.0      |    Severity:  Problem      
Resolution:                    |    Keywords:               
-------------------------------+--------------------------------------------

Comment (by anonymous):

 Yes, the boost preprocessor library changed behavior from 1.48.0 to
 1.49.0.

 For Visual C++ 8.0, preprocessing this code:

 {{{#!cpp
 #include <boost/preprocessor/tuple/to_list.hpp>

 BOOST_PP_TUPLE_TO_LIST(2, (a, b))
 BOOST_PP_TUPLE_TO_LIST(1, (a))
 BOOST_PP_TUPLE_TO_LIST(0, ())
 }}}

 used to give this output:

 {{{#!cpp
 (a, (b, BOOST_PP_NIL))
 (a, BOOST_PP_NIL)
 BOOST_PP_NIL
 }}}

 but for 1.49.0 the compiler give these warnings:

 a.cpp(5) : warning C4003: not enough actual parameters for macro
 'BOOST_PP_TUPLE_TO_LIST_1'
 a.cpp(5) : warning C4003: not enough actual parameters for macro
 'BOOST_PP_TUPLE_TO_LIST_1'

 and this output:

 {{{#!cpp
 (a, (b, BOOST_PP_NIL))
 (a, BOOST_PP_NIL)
 (, BOOST_PP_NIL)
 }}}

 I have similar problems for BOOST_PP_TUPLE_TO_SEQ() and for Clang 3.1.
 These
 problems still exist for the latest version of boost (1.52.0).

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/6616#comment:1>
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