Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world. Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

This is the documentation for an old version of Boost. Click here to view this page for the latest version.
PrevUpHomeNext

conditional

Header: #include <boost/type_traits/conditional.hpp> or #include <boost/type_traits.hpp>

namespace boost {
  template <bool B, class T, class U>  struct conditional;
}

If B is true, the member typedef type shall equal T. If B is false, the member typedef type shall equal U.

This trait is really just an alias for boost::mpl::if_c.


PrevUpHomeNext