template< typename T1 , typename T2 > struct greater { typedef unspecified type; };
Returns true_
if T1::value > T2::value
and false_
otherwise [1].
#include "boost/mpl/greater.hpp"
Parameter | Requirement | Description |
---|---|---|
T1, T2 | A model of Integral Constant |
Expression | Expression type | Precondition | Semantics | Postcondition |
---|---|---|---|---|
typedef greater<t1,t2>::type c; | A model of bool Integral Constant | Equivalent to typedef bool_<(t1::value > t2::value)> c; |
Amortized constant time.
typedef list_c<int,1,2,3,5,7,12,19,31> fibonacci; typedef find_if< fibonacci, greater<_1,int_<10> > >::type iter; BOOST_STATIC_ASSERT(iter::type::value == 12));
[1] The greater
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, greater_equal
, less
, less_equal
, equal_to
, not_equal_to