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Sprout/source/libs/algorithm/is_strictly_decreasing.rst

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2013-08-22 07:53:23 +00:00
.. _sprout-algorithm-is_strictly_decreasing:
###############################################################################
is_strictly_decreasing
###############################################################################
Interface
========================================
.. sourcecode:: c++
template<typename ForwardIterator>
inline SPROUT_CONSTEXPR bool
is_strictly_decreasing(ForwardIterator first, ForwardIterator last);
Returns
========================================
| Same as ``is_sorted(first, last, greater_equal<>())``.
Examples
========================================
.. sourcecode:: c++
#include <sprout/algorithm/is_strictly_decreasing.hpp>
#include <sprout/array.hpp>
#include <sprout/container.hpp>
using namespace sprout;
SPROUT_STATIC_CONSTEXPR auto input = array<int, 10>{{10, 9, 8, 7, 6, 5, 4, 3, 2, 1}};
SPROUT_STATIC_CONSTEXPR auto result = sprout::is_strictly_decreasing(begin(input), end(input));
static_assert(result, "input is strictly decreasing.");
Complexity
========================================
| Recursive function invocations in *O(logN)* (logarithmic) depth.
Header
========================================
| ``sprout/algorithm/is_strictly_decreasing.hpp``
| Convenience header: ``sprout/algorithm.hpp``