minus
template<
typename T1
, typaname T2
, typaname T3 = integral_c<int,0>
, ...
, typaname Tn = integral_c<int,0>
>
struct minus
{
typedef unspecified type;
};
Returns the difference of its arguments [1].
#include "boost/mpl/arithmetic/minus.hpp"
| Parameter | Requirement | Description |
|---|---|---|
T1, T2, .., Tn | A model of Integral Constant |
| Expression | Expression type | Precondition | Semantics | Postcondition |
|---|---|---|---|---|
typedef minus<t1,t2,..,tn>::type diff; | A model of Integral Constant | Equivalent to typedef integral_c<typeof(t1::value - t2::value .. - tn::value), t1::value - t2::value .. - tn::value > diff; |
Amortized constant time.
typedef minus< integral_c<short,-1>, integral_c<long,10> >::type diff; BOOST_STATIC_ASSERT(diff::value == -11)); BOOST_MPL_ASSERT_IS_SAME(diff::value_type, long);
[1] The minus metafunction can be (and is expected to be) specialized by user to work on user-defined types that do not satisfy the Integral Constant requirements. The requirements listed here are the ones imposed by the default implementation.
Metafunctions, plus, divides, multiplies, modulus, negate