Re: [boost] [type_traits] is_enum on scoped enums doesn't works as expected

Subject: Re: [boost] [type_traits] is_enum on scoped enums doesn't works as expected
From: Vicente Botet (vicente.botet_at_[hidden])
Date: 2011-08-24 10:43:54

Vicente Botet wrote:
> 
> Hi,
> 
> The following file fails to compile under clang 2.9 c++0x
> 
> #include <boost/static_assert.hpp>
> #include <boost/type_traits/is_enum.hpp>
> 
> enum E {E_a,E_b,E_c};
> BOOST_STATIC_ASSERT((boost::is_enum<E>::value));
> enum class EC {a,b,c};
> BOOST_STATIC_ASSERT((boost::is_enum<EC>::value));
> 
> //#include <type_traits>
> 
> The command line and error is
> 
>      "/Users/viboes/clang/clang+llvm-2.9/bin/clang++" -x c++ -std=c++0x 
> -O0 -g -Wextra -Wno-long-long -pedantic -O0 -fno-inline -Wall -pedantic 
> -g -DBOOST_ALL_NO_LIB=1 -DBOOST_CONVERSION_DOUBLE_CP 
> -DBOOST_ENABLE_WARNINGS -I"." -I"../../.." -c -o 
> "../../../bin.v2/libs/enums/test/is_enum_pass.test/clang-darwin-2.9x/debug/is_enum_pass.o" 
> "enum_class/is_enum_pass.cpp"
> 
> enum_class/is_enum_pass.cpp:7:1: error: static_assert failed 
> "(boost::is_enum<EC>::value)"
> BOOST_STATIC_ASSERT((boost::is_enum<EC>::value));
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> In file included from enum_class/is_enum_pass.cpp:1:
> 
> Am I missing something evident?
> Is this a known bug of is_enum?
> 
> BTW, I have tried to use directly the type_traits standard file and my 
> build configuration is unable to find it.
> 
> enum_class/is_enum_pass.cpp:9:10: fatal error: 'type_traits' file not
> found
> #include <type_traits>
> 
> Which is the default library when building with Boost.Build (bjam) and 
> clang 2.9 c++0x?
> 
> 

Hi,

can someone reply to this post?

Thanks,
Vicente 

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