Re: [boost] [mpl] Using apply with gcc error

3 Feb 2011

      AMDG

On 2/3/2011 2:42 PM, Edward Diener wrote:
...
Compiling this code with gcc:
#include <boost/config.hpp>
#include <boost/mpl/apply.hpp>
template
<
class MF,
class T
...
struct myMF :
boost::mpl::apply<MF,T>
{
BOOST_STATIC_CONSTANT(bool,value=type::value);
};
int main()
{
return 0;
}
Gives:
"gcc.compile.c++
..\..\..\bin.v2\libs\tti\test\TestMFHasTypeMFC.test\gcc-mingw-4.5.2\debug\TestMFHasTypeMFC.o
TestMFHasTypeMFC.cpp:18:5: error: 'type' has not been declared
gcc is correct.  Members of a dependent base class are
not visible in the derived class.  (This is necessary
to allow the template to be parsed before the template
arguments are known.).

Add
using typename boost::mpl::apply<MF,T>::type;

In Christ,
Steven Watanabe