less
template<
typename T1
, typaname T2
>
struct less
{
typedef unspecified type;
};
Returns true_c if T1::value < T2::value and false_c otherwise [1].
#include "boost/mpl/comparison/less.hpp"
| Parameter | Requirement | Description |
|---|---|---|
T1, T2 | A model of Integral Constant |
| Expression | Expression type | Precondition | Semantics | Postcondition |
|---|---|---|---|---|
typedef less<t1,t2>::type c; | A model of bool Integral Constant | Equivalent to typedef bool_c<(t1::value < t2::value)> c; |
Amortized constant time.
typedef list_c<int,0,1,2,3,4,5,6,7,8,9> numbers; typedef remove_if< numbers, less<_,int_c<5> > >::type result; BOOST_STATIC_ASSERT(equal< result,range_c<int,5,10>,equal_to<_,_> >::type::value));
[1] The less 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, less_equal, greater, greater_equal, equal, not_equal_to