Re: [boost] [type_traits] is_const and is_volatile broken for VC7.1

10 Feb 2006

      Peder Holt wrote:
...
is_const and is_volatile fails to detect const and volatile arrays on VC7.1
The following code prints "Success" in VC6.5 and VC8, but "Failure" in VC7.1
#include <iostream>
#include <boost/type_traits.hpp>
void test(boost::mpl::true_) {
  std::cout<< "Success" << std::endl;
}
void test(boost::mpl::false_) {
  std::cout << "Failure" << std::endl;
}
int main()
{
  boost::is_const<int const[2]>::type const_;
  boost::is_volatile<int volatile[2]>::type volatile_;
  test(const_);
  test(volatile_);
  return 0;
}
I've encountered it, too.

FWIW, under VC7.1,
Writing 'const T' when T is an array type (eg. boost::is_xxx<const T>::type etc) doesn't work.
But boost::is_xxx<boost::add_const<T>::type>::type works fine.
That's why I always use boost::add_const.

-- 
Regards,
Shunsuke Sogame