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
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
template<class... T> struct conjunction;
Inherits: Inherits from the first type
U in the list for which
bool(U::value) is false,
or the last type in the list if there is no such type. If sizeof...(T)
is 0 then inherits from true_type.
Header: #include
<boost/type_traits/conjunction.hpp>
Compiler Compatibility: All current compilers
are supported by this trait. In the absence of variadic-template support,
conjunction has only 2 parameters.
Examples:
Given:
template<int N> struct Int { static const int value = N };
conjunction<>inherits fromtrue_type.
conjunction<Int<1> >inherits fromInt<1>.
conjunction<Int<1>, Int<2>, Int<3> >inherits fromInt<3>.
conjunction<Int<1>, Int<0>, Int<3> >inherits fromInt<0>.