Re: [boost] [mpl] mpl::c_str fails for mpl::push_back

Subject: Re: [boost] [mpl] mpl::c_str fails for mpl::push_back
From: Eric Niebler (eric_at_[hidden])
Date: 2010-11-06 21:15:34

On 11/6/2010 8:51 PM, vicente.botet wrote:
> Hi,
> 
> the following results in a compile error for msvc-10.0. It works for gcc-3.4, gcc-4.3, gcc-4.5.
> 
> typedef mpl::vector_c<char, 'h','e','l','l','o',' ','w','o','r','l','d'> hello;
> 
> typedef mpl::push_back<hello, mpl::char_<'!'> >::type hello2;
> 
> BOOST_TEST((std::string(mpl::c_str<hello2>::value)== "hello world!")); // line 59
> 
> C:\cygwin\boost\v44\boost/mpl/string.hpp(592) : error C2039: 'value_type' : is not a member of 'boost::mpl::vector12<T0,T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11>'
>         with
>         [
>             T0=boost::mpl::integral_c<char,104>,
>             T1=boost::mpl::integral_c<char,101>,
>             T2=boost::mpl::integral_c<char,108>,
>             T3=boost::mpl::integral_c<char,108>,
>             T4=boost::mpl::integral_c<char,111>,
>             T5=boost::mpl::integral_c<char,32>,
>             T6=boost::mpl::integral_c<char,119>,
>             T7=boost::mpl::integral_c<char,111>,
>             T8=boost::mpl::integral_c<char,114>,
>             T9=boost::mpl::integral_c<char,108>,
>             T10=boost::mpl::integral_c<char,100>,
>             T11=boost::mpl::char_<33>
>         ]
>         io\match_pass.cpp(59) : see reference to class template instantiation 'boost::mpl::c_str<Sequence>' being compiled
>         with
>         [
>             Sequence=hello2
>         ]
> 
> Is this a known bug? 

mpl::c_str is for use with mpl::string. Does the problem also occur with
mpl::string?

-- 
Eric Niebler
BoostPro Computing
http://www.boostpro.com