...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Front Page / Data Types / Numeric / long_ |
An Integral Constant wrapper for long.
#include <boost/mpl/long.hpp>
Parameter | Requirement | Description |
---|---|---|
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 constant n:
Expression | Semantics |
---|---|
long_<c> | An Integral Constant x such that x::value == c and x::value_type is identical to long. |
typedef long_<8> eight; BOOST_MPL_ASSERT(( is_same< eight::value_type, long > )); BOOST_MPL_ASSERT(( is_same< eight::type, eight > )); BOOST_MPL_ASSERT(( is_same< next< eight >::type, long_<9> > )); BOOST_MPL_ASSERT(( is_same< prior< eight >::type, long_<7> > )); BOOST_MPL_ASSERT_RELATION( (eight::value), ==, 8 ); assert( eight() == 8 );