[Boost-bugs] [Boost C++ Libraries] #8679: Boost.Test pollutes boost namespace with it's own enable_if/disable_if templates

Subject: [Boost-bugs] [Boost C++ Libraries] #8679: Boost.Test pollutes boost namespace with it's own enable_if/disable_if templates
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2013-06-09 12:06:28

#8679: Boost.Test pollutes boost namespace with it's own enable_if/disable_if
templates
-------------------------------------+-------------------------
 Reporter:  johnmaddock              |      Owner:  rogeeff
     Type:  Bugs                     |     Status:  new
Milestone:  To Be Determined         |  Component:  test
  Version:  Boost Development Trunk  |   Severity:  Showstopper
 Keywords:                           |
-------------------------------------+-------------------------
 The following test program:

 {{{
 #define BOOST_TEST_MODULE my_test

 #include <boost/multiprecision/cpp_dec_float.hpp>

 #define BOOST_TEST_MAIN
 #include <boost/test/included/unit_test.hpp> // Note: header-only
 Boost.Test
 #include <boost/test/floating_point_comparison.hpp>

 BOOST_AUTO_TEST_CASE(my_test)
 {
   typedef
 boost::multiprecision::number<boost::multiprecision::cpp_dec_float<50>,
                                         boost::multiprecision::et_off>
 mp_type;

   const mp_type test_value = mp_type(12) / 7;
 }
 }}}

 Fails to compile due to ambiguities between boost::enable_if and
 boost::unit_test::decorator::disable_if:

 {{{
 1>d:\data\boost\trunk\boost\multiprecision\number.hpp(118): error C2872:
 'enable_if' : ambiguous symbol
 1>          could be 'd:\data\boost\trunk\boost\utility\enable_if.hpp(36)
 : boost::enable_if'
 1>          or
 'd:\data\boost\trunk\boost\test\tree\decorator.hpp(184) :
 boost::unit_test::decorator::enable_if'
 1>          d:\data\boost\trunk\boost\type_traits\is_convertible.hpp(484)
 : see reference to class template instantiation
 'boost::multiprecision::number<Backend>' being compiled
 1>          with
 1>          [
 1>              Backend=boost::multiprecision::backends::cpp_dec_float<50>
 1>          ]
 1>
 d:\data\boost\trunk\boost\multiprecision\detail\no_et_ops.hpp(455) : see
 reference to class template instantiation 'boost::is_convertible<From,To>'
 being compiled
 1>          with
 1>          [
 1>              From=__int64,
 1>
 To=boost::multiprecision::number<boost::multiprecision::backends::cpp_dec_float<50>>
 1>          ]
 1>          d:\data\boost\trunk\ide\math\scrap\scrap.cpp(38) : see
 reference to function template instantiation
 'boost::multiprecision::number<Backend,ExpressionTemplates>
 boost::multiprecision::operator
 /<boost::multiprecision::backends::cpp_dec_float<Digits10>,int>(boost::multiprecision::number<Backend,ExpressionTemplates>
 &&,const V &)' being compiled
 1>          with
 1>          [
 1>
 Backend=boost::multiprecision::backends::cpp_dec_float<50>,
 1>              ExpressionTemplates=et_off,
 1>              Digits10=50,
 1>              V=int
 1>          ]
 1>d:\data\boost\trunk\boost\multiprecision\number.hpp(118): error C2872:
 'enable_if' : ambiguous symbol
 1>          could be 'd:\data\boost\trunk\boost\utility\enable_if.hpp(36)
 : boost::enable_if'
 1>          or
 'd:\data\boost\trunk\boost\test\tree\decorator.hpp(184) :
 boost::unit_test::decorator::enable_if'
 1>d:\data\boost\trunk\boost\multiprecision\number.hpp(118): error C2872:
 'enable_if' : ambiguous symbol
 1>          could be 'd:\data\boost\trunk\boost\utility\enable_if.hpp(36)
 : boost::enable_if'
 1>          or
 'd:\data\boost\trunk\boost\test\tree\decorator.hpp(184) :
 boost::unit_test::decorator::enable_if'
 1>d:\data\boost\trunk\boost\multiprecision\number.hpp(118): error C2872:
 'enable_if' : ambiguous symbol
 1>          could be 'd:\data\boost\trunk\boost\utility\enable_if.hpp(36)
 : boost::enable_if'
 1>          or
 'd:\data\boost\trunk\boost\test\tree\decorator.hpp(184) :
 boost::unit_test::decorator::enable_if'
 1>d:\data\boost\trunk\boost\multiprecision\number.hpp(124): error C2872:
 'enable_if' : ambiguous symbol
 1>          could be 'd:\data\boost\trunk\boost\utility\enable_if.hpp(36)
 : boost::enable_if'
 1>          or
 'd:\data\boost\trunk\boost\test\tree\decorator.hpp(184) :
 boost::unit_test::decorator::enable_if'
 1>d:\data\boost\trunk\boost\multiprecision\number.hpp(124): error C2872:
 'enable_if' : ambiguous symbol
 1>          could be 'd:\data\boost\trunk\boost\utility\enable_if.hpp(36)
 : boost::enable_if'
 1>          or
 'd:\data\boost\trunk\boost\test\tree\decorator.hpp(184) :
 boost::unit_test::decorator::enable_if'
 1>d:\data\boost\trunk\boost\multiprecision\number.hpp(124): error C2872:
 'enable_if' : ambiguous symbol
 1>          could be 'd:\data\boost\trunk\boost\utility\enable_if.hpp(36)
 : boost::enable_if'
 1>          or
 'd:\data\boost\trunk\boost\test\tree\decorator.hpp(184) :
 boost::unit_test::decorator::enable_if'
 1>d:\data\boost\trunk\boost\multiprecision\number.hpp(124): error C2872:
 'enable_if' : ambiguous symbol
 1>          could be 'd:\data\boost\trunk\boost\utility\enable_if.hpp(36)
 : boost::enable_if'
 1>          or
 'd:\data\boost\trunk\boost\test\tree\decorator.hpp(184) :
 boost::unit_test::decorator::enable_if'
 1>d:\data\boost\trunk\boost\multiprecision\number.hpp(131): error C2872:
 'enable_if' : ambiguous symbol
 1>          could be 'd:\data\boost\trunk\boost\utility\enable_if.hpp(36)
 : boost::enable_if'
 1>          or
 'd:\data\boost\trunk\boost\test\tree\decorator.hpp(184) :
 boost::unit_test::decorator::enable_if'
 1>d:\data\boost\trunk\boost\multiprecision\number.hpp(131): error C2872:
 'enable_if' : ambiguous symbol
 1>          could be 'd:\data\boost\trunk\boost\utility\enable_if.hpp(36)
 : boost::enable_if'
 1>          or
 'd:\data\boost\trunk\boost\test\tree\decorator.hpp(184) :
 boost::unit_test::decorator::enable_if'
 1>d:\data\boost\trunk\boost\multiprecision\number.hpp(153): error C2872:
 'enable_if' : ambiguous symbol
 1>          could be 'd:\data\boost\trunk\boost\utility\enable_if.hpp(36)
 : boost::enable_if'
 1>          or
 'd:\data\boost\trunk\boost\test\tree\decorator.hpp(184) :
 boost::unit_test::decorator::enable_if'
 1>d:\data\boost\trunk\boost\multiprecision\number.hpp(153): error C2872:
 'enable_if' : ambiguous symbol
 1>          could be 'd:\data\boost\trunk\boost\utility\enable_if.hpp(36)
 : boost::enable_if'
 1>          or
 'd:\data\boost\trunk\boost\test\tree\decorator.hpp(184) :
 boost::unit_test::decorator::enable_if'
 1>d:\data\boost\trunk\boost\multiprecision\number.hpp(168): error C2872:
 'disable_if' : ambiguous symbol
 1>          could be 'd:\data\boost\trunk\boost\utility\enable_if.hpp(59)
 : boost::disable_if'
 1>          or
 'd:\data\boost\trunk\boost\test\tree\decorator.hpp(197) :
 boost::unit_test::decorator::disable_if'
 1>d:\data\boost\trunk\boost\multiprecision\number.hpp(168): error C2872:
 'disable_if' : ambiguous symbol
 1>          could be 'd:\data\boost\trunk\boost\utility\enable_if.hpp(59)
 : boost::disable_if'
 1>          or
 'd:\data\boost\trunk\boost\test\tree\decorator.hpp(197) :
 boost::unit_test::decorator::disable_if'
 1>d:\data\boost\trunk\boost\multiprecision\number.hpp(237): error C2872:
 'enable_if' : ambiguous symbol
 1>          could be 'd:\data\boost\trunk\boost\utility\enable_if.hpp(36)
 : boost::enable_if'
 1>          or
 'd:\data\boost\trunk\boost\test\tree\decorator.hpp(184) :
 boost::unit_test::decorator::enable_if'
 1>d:\data\boost\trunk\boost\multiprecision\number.hpp(237): error C2872:
 'enable_if' : ambiguous symbol
 1>          could be 'd:\data\boost\trunk\boost\utility\enable_if.hpp(36)
 : boost::enable_if'
 1>          or
 'd:\data\boost\trunk\boost\test\tree\decorator.hpp(184) :
 boost::unit_test::decorator::enable_if'
 1>d:\data\boost\trunk\boost\multiprecision\number.hpp(268): error C2872:
 'enable_if' : ambiguous symbol
 1>          could be 'd:\data\boost\trunk\boost\utility\enable_if.hpp(36)
 : boost::enable_if'
 1>          or
 'd:\data\boost\trunk\boost\test\tree\decorator.hpp(184) :
 boost::unit_test::decorator::enable_if'
 1>d:\data\boost\trunk\boost\multiprecision\number.hpp(268): error C2872:
 'enable_if' : ambiguous symbol
 1>          could be 'd:\data\boost\trunk\boost\utility\enable_if.hpp(36)
 : boost::enable_if'
 1>          or
 'd:\data\boost\trunk\boost\test\tree\decorator.hpp(184) :
 boost::unit_test::decorator::enable_if'
 1>d:\data\boost\trunk\boost\multiprecision\number.hpp(312): error C2872:
 'enable_if' : ambiguous symbol
 1>          could be 'd:\data\boost\trunk\boost\utility\enable_if.hpp(36)
 : boost::enable_if'
 1>          or
 'd:\data\boost\trunk\boost\test\tree\decorator.hpp(184) :
 boost::unit_test::decorator::enable_if'
 1>d:\data\boost\trunk\boost\multiprecision\number.hpp(312): error C2872:
 'enable_if' : ambiguous symbol
 1>          could be 'd:\data\boost\trunk\boost\utility\enable_if.hpp(36)
 : boost::enable_if'
 1>          or
 'd:\data\boost\trunk\boost\test\tree\decorator.hpp(184) :
 boost::unit_test::decorator::enable_if'
 1>d:\data\boost\trunk\boost\multiprecision\number.hpp(343): error C2872:
 'enable_if' : ambiguous symbol
 1>          could be 'd:\data\boost\trunk\boost\utility\enable_if.hpp(36)
 : boost::enable_if'
 1>          or
 'd:\data\boost\trunk\boost\test\tree\decorator.hpp(184) :
 boost::unit_test::decorator::enable_if'
 1>d:\data\boost\trunk\boost\multiprecision\number.hpp(343): error C2872:
 'enable_if' : ambiguous symbol
 1>          could be 'd:\data\boost\trunk\boost\utility\enable_if.hpp(36)
 : boost::enable_if'
 1>          or
 'd:\data\boost\trunk\boost\test\tree\decorator.hpp(184) :
 boost::unit_test::decorator::enable_if'
 1>d:\data\boost\trunk\boost\multiprecision\number.hpp(391): error C2872:
 'enable_if' : ambiguous symbol
 1>          could be 'd:\data\boost\trunk\boost\utility\enable_if.hpp(36)
 : boost::enable_if'
 1>          or
 'd:\data\boost\trunk\boost\test\tree\decorator.hpp(184) :
 boost::unit_test::decorator::enable_if'
 1>d:\data\boost\trunk\boost\multiprecision\number.hpp(391): error C2872:
 'enable_if' : ambiguous symbol
 1>          could be 'd:\data\boost\trunk\boost\utility\enable_if.hpp(36)
 : boost::enable_if'
 1>          or
 'd:\data\boost\trunk\boost\test\tree\decorator.hpp(184) :
 boost::unit_test::decorator::enable_if'
 1>d:\data\boost\trunk\boost\multiprecision\number.hpp(400): error C2872:
 'enable_if' : ambiguous symbol
 1>          could be 'd:\data\boost\trunk\boost\utility\enable_if.hpp(36)
 : boost::enable_if'
 1>          or
 'd:\data\boost\trunk\boost\test\tree\decorator.hpp(184) :
 boost::unit_test::decorator::enable_if'
 1>d:\data\boost\trunk\boost\multiprecision\number.hpp(400): error C2872:
 'enable_if' : ambiguous symbol
 1>          could be 'd:\data\boost\trunk\boost\utility\enable_if.hpp(36)
 : boost::enable_if'
 1>          or
 'd:\data\boost\trunk\boost\test\tree\decorator.hpp(184) :
 boost::unit_test::decorator::enable_if'
 1>d:\data\boost\trunk\boost\multiprecision\number.hpp(431): error C2872:
 'enable_if' : ambiguous symbol
 1>          could be 'd:\data\boost\trunk\boost\utility\enable_if.hpp(36)
 : boost::enable_if'
 1>          or
 'd:\data\boost\trunk\boost\test\tree\decorator.hpp(184) :
 boost::unit_test::decorator::enable_if'
 1>d:\data\boost\trunk\boost\multiprecision\number.hpp(431): error C2872:
 'enable_if' : ambiguous symbol
 1>          could be 'd:\data\boost\trunk\boost\utility\enable_if.hpp(36)
 : boost::enable_if'
 1>          or
 'd:\data\boost\trunk\boost\test\tree\decorator.hpp(184) :
 boost::unit_test::decorator::enable_if'
 1>d:\data\boost\trunk\boost\multiprecision\number.hpp(465): error C2872:
 'enable_if' : ambiguous symbol
 1>          could be 'd:\data\boost\trunk\boost\utility\enable_if.hpp(36)
 : boost::enable_if'
 1>          or
 'd:\data\boost\trunk\boost\test\tree\decorator.hpp(184) :
 boost::unit_test::decorator::enable_if'
 1>d:\data\boost\trunk\boost\multiprecision\number.hpp(465): error C2872:
 'enable_if' : ambiguous symbol
 1>          could be 'd:\data\boost\trunk\boost\utility\enable_if.hpp(36)
 : boost::enable_if'
 1>          or
 'd:\data\boost\trunk\boost\test\tree\decorator.hpp(184) :
 boost::unit_test::decorator::enable_if'
 1>d:\data\boost\trunk\boost\multiprecision\number.hpp(500): error C2872:
 'enable_if' : ambiguous symbol
 1>          could be 'd:\data\boost\trunk\boost\utility\enable_if.hpp(36)
 : boost::enable_if'
 1>          or
 'd:\data\boost\trunk\boost\test\tree\decorator.hpp(184) :
 boost::unit_test::decorator::enable_if'
 1>d:\data\boost\trunk\boost\multiprecision\number.hpp(500): error C2872:
 'enable_if' : ambiguous symbol
 1>          could be 'd:\data\boost\trunk\boost\utility\enable_if.hpp(36)
 : boost::enable_if'
 1>          or
 'd:\data\boost\trunk\boost\test\tree\decorator.hpp(184) :
 boost::unit_test::decorator::enable_if'
 1>d:\data\boost\trunk\boost\multiprecision\number.hpp(533): error C2872:
 'enable_if' : ambiguous symbol
 1>          could be 'd:\data\boost\trunk\boost\utility\enable_if.hpp(36)
 : boost::enable_if'
 1>          or
 'd:\data\boost\trunk\boost\test\tree\decorator.hpp(184) :
 boost::unit_test::decorator::enable_if'
 1>d:\data\boost\trunk\boost\multiprecision\number.hpp(533): error C2872:
 'enable_if' : ambiguous symbol
 1>          could be 'd:\data\boost\trunk\boost\utility\enable_if.hpp(36)
 : boost::enable_if'
 1>          or
 'd:\data\boost\trunk\boost\test\tree\decorator.hpp(184) :
 boost::unit_test::decorator::enable_if'
 1>d:\data\boost\trunk\boost\multiprecision\number.hpp(661): error C2872:
 'enable_if' : ambiguous symbol
 1>          could be 'd:\data\boost\trunk\boost\utility\enable_if.hpp(36)
 : boost::enable_if'
 1>          or
 'd:\data\boost\trunk\boost\test\tree\decorator.hpp(184) :
 boost::unit_test::decorator::enable_if'
 1>d:\data\boost\trunk\boost\multiprecision\number.hpp(661): error C2872:
 'enable_if' : ambiguous symbol
 1>          could be 'd:\data\boost\trunk\boost\utility\enable_if.hpp(36)
 : boost::enable_if'
 1>          or
 'd:\data\boost\trunk\boost\test\tree\decorator.hpp(184) :
 boost::unit_test::decorator::enable_if'
 1>d:\data\boost\trunk\boost\multiprecision\number.hpp(1637): error C2872:
 'disable_if' : ambiguous symbol
 1>          could be 'd:\data\boost\trunk\boost\utility\enable_if.hpp(59)
 : boost::disable_if'
 1>          or
 'd:\data\boost\trunk\boost\test\tree\decorator.hpp(197) :
 boost::unit_test::decorator::disable_if'
 1>d:\data\boost\trunk\boost\multiprecision\number.hpp(1637): error C2872:
 'disable_if' : ambiguous symbol
 1>          could be 'd:\data\boost\trunk\boost\utility\enable_if.hpp(59)
 : boost::disable_if'
 1>          or
 'd:\data\boost\trunk\boost\test\tree\decorator.hpp(197) :
 boost::unit_test::decorator::disable_if'
 1>d:\data\boost\trunk\boost\multiprecision\number.hpp(1640): error C2872:
 'enable_if' : ambiguous symbol
 1>          could be 'd:\data\boost\trunk\boost\utility\enable_if.hpp(36)
 : boost::enable_if'
 1>          or
 'd:\data\boost\trunk\boost\test\tree\decorator.hpp(184) :
 boost::unit_test::decorator::enable_if'
 1>d:\data\boost\trunk\boost\multiprecision\number.hpp(1640): error C2872:
 'enable_if' : ambiguous symbol
 1>          could be 'd:\data\boost\trunk\boost\utility\enable_if.hpp(36)
 : boost::enable_if'
 1>          or
 'd:\data\boost\trunk\boost\test\tree\decorator.hpp(184) :
 boost::unit_test::decorator::enable_if'
 }}}

 IMO Boost.Test should not pollute namespace boost with types of the same
 name as other types already there.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/8679>
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