id,summary,reporter,owner,description,type,status,milestone,component,version,severity,resolution,keywords,cc 8679,Boost.Test pollutes boost namespace with it's own enable_if/disable_if templates,John Maddock,Gennadiy Rozental,"The following test program: {{{ #define BOOST_TEST_MODULE my_test #include #define BOOST_TEST_MAIN #include // Note: header-only Boost.Test #include BOOST_AUTO_TEST_CASE(my_test) { typedef boost::multiprecision::number, 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' 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' being compiled 1> with 1> [ 1> From=__int64, 1> To=boost::multiprecision::number> 1> ] 1> d:\data\boost\trunk\ide\math\scrap\scrap.cpp(38) : see reference to function template instantiation 'boost::multiprecision::number boost::multiprecision::operator /,int>(boost::multiprecision::number &&,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. ",Bugs,closed,Boost 1.59.0,test,Boost Development Trunk,Showstopper,fixed,,