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49 lines
1.5 KiB
ReStructuredText
49 lines
1.5 KiB
ReStructuredText
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.. _sprout-algorithm-is_heap_until:
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###############################################################################
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is_heap_until
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###############################################################################
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Interface
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========================================
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.. sourcecode:: c++
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template<typename RandomAccessIterator>
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inline SPROUT_CONSTEXPR RandomAccessIterator
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is_heap_until(RandomAccessIterator first, RandomAccessIterator last);
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template<typename RandomAccessIterator, typename Compare>
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inline SPROUT_CONSTEXPR RandomAccessIterator
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is_heap_until(RandomAccessIterator first, RandomAccessIterator last, Compare comp);
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Returns
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========================================
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| If ``distance(first, last) < 2``, returns last.
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| Otherwise, returns the last iterator i in [first,last] for which the range [first,i) is a heap.
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Examples
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========================================
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.. sourcecode:: c++
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#include <sprout/algorithm/is_heap_until.hpp>
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#include <sprout/array.hpp>
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#include <sprout/container.hpp>
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using namespace sprout;
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SPROUT_STATIC_CONSTEXPR auto input = array<int, 10>{{10, 9, 8, 6, 7, 2, 5, 13, 14, 11}};
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SPROUT_STATIC_CONSTEXPR auto result = sprout::is_heap_until(begin(input), end(input));
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static_assert(result - begin(input) == 7, "input is a heap until position 7.");
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Complexity
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========================================
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| Linear.
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| Recursive function invocations in *O(logN)* (logarithmic) depth.
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Header
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========================================
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| ``sprout/algorithm/is_heap_until.hpp``
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| Convenience header: ``sprout/algorithm.hpp``
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