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template<
      typename T, T N
    >
struct integral_c
{
    // unspecified
    // ...
};
A generic Integral Constant wrapper.
#include <boost/mpl/integral_c.hpp>
| Parameter | Requirement | Description | 
|---|---|---|
| T | An integral type | Wrapper's value type. | 
| N | An integral constant | A value to wrap. | 
The semantics of an expression are defined only where they differ from, or are not defined in Integral Constant.
For arbitrary integral type t and integral constant n:
| Expression | Semantics | 
|---|---|
| integral_c<t,c> | An Integral Constant x such that x::value == c and x::value_type is identical to t. | 
typedef integral_c<short,8> eight; BOOST_MPL_ASSERT(( is_same< eight::value_type, short > )); BOOST_MPL_ASSERT(( is_same< eight::type, eight > )); BOOST_MPL_ASSERT(( is_same< next< eight >::type, integral_c<short,9> > )); BOOST_MPL_ASSERT(( is_same< prior< eight >::type, integral_c<short,7> > )); BOOST_MPL_ASSERT_RELATION( (eight::value), ==, 8 ); assert( eight() == 8 );