mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
synced 2024-11-29 01:03:45 +00:00
66 lines
2.9 KiB
ReStructuredText
66 lines
2.9 KiB
ReStructuredText
.. _sprout-algorithm-tristate_lexicographical_compare:
|
|
###############################################################################
|
|
tristate_lexicographical_compare
|
|
###############################################################################
|
|
|
|
Interface
|
|
========================================
|
|
.. sourcecode:: c++
|
|
|
|
template<typename InputIterator1, typename InputIterator2>
|
|
inline SPROUT_CONSTEXPR int
|
|
tristate_lexicographical_compare(
|
|
InputIterator1 first1, InputIterator1 last1,
|
|
InputIterator2 first2, InputIterator2 last2
|
|
);
|
|
|
|
template<typename InputIterator1, typename InputIterator2, typename Compare>
|
|
inline SPROUT_CONSTEXPR int
|
|
tristate_lexicographical_compare(
|
|
InputIterator1 first1, InputIterator1 last1,
|
|
InputIterator2 first2, InputIterator2 last2,
|
|
Compare comp
|
|
);
|
|
|
|
Returns
|
|
========================================
|
|
|
|
| A value less than zero if the sequence of elements defined by the range [first1,last1) is lexicographically less than the sequence of elements defined by the range [first2,last2) and false otherwise.
|
|
| A value greater than zero if the sequence of elements defined by the range [first1,last1) is lexicographically greater than the sequence of elements defined by the range [first2,last2) and false otherwise.
|
|
| Otherwise, returns a zero value.
|
|
|
|
Remarks
|
|
========================================
|
|
|
|
| If two sequences have the same number of elements and their corresponding elements are equivalent, then neither sequence is lexicographically less than the other.
|
|
| If one sequence is a prefix of the other, then the shorter sequence is lexicographically less than the longer sequence.
|
|
| Otherwise, the lexicographical comparison of the sequences yields the same result as the comparison of the first corresponding pair of elements that are not equivalent.
|
|
|
|
| An empty sequence is lexicographically less than any non-empty sequence, but not less than any empty sequence.
|
|
|
|
Examples
|
|
========================================
|
|
.. sourcecode:: c++
|
|
|
|
#include <sprout/algorithm/tristate_lexicographical_compare.hpp>
|
|
#include <sprout/array.hpp>
|
|
#include <sprout/container.hpp>
|
|
using namespace sprout;
|
|
|
|
SPROUT_STATIC_CONSTEXPR auto input1 = array<int, 10>{{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}};
|
|
SPROUT_STATIC_CONSTEXPR auto input2 = array<int, 10>{{1, 2, 3, 4, 5, 6, 7, 11, 12, 13}};
|
|
SPROUT_STATIC_CONSTEXPR auto result = sprout::tristate_lexicographical_compare(begin(input1), end(input1), begin(input2), end(input2));
|
|
static_assert(result < 0, "input1 < input2 by lexicographical comparison.");
|
|
|
|
Complexity
|
|
========================================
|
|
|
|
| At most ``2*min((last1 - first1), (last2 - first2)) + O(1)`` applications of the corresponding comparison.
|
|
| Recursive function invocations in *O(logN)* (logarithmic) depth.
|
|
|
|
Header
|
|
========================================
|
|
|
|
| ``sprout/algorithm/tristate_lexicographical_compare.hpp``
|
|
| Convenience header: ``sprout/algorithm.hpp``
|
|
|