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47 lines
1.5 KiB
ReStructuredText
47 lines
1.5 KiB
ReStructuredText
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.. _sprout-algorithm-find_if:
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###############################################################################
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find_if
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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 InputIterator, typename Predicate>
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inline SPROUT_CONSTEXPR InputIterator
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find_if(InputIterator first, InputIterator last, Predicate pred);
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Returns
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========================================
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| The first iterator i in the range [first,last) for which the following corresponding conditions hold: ``pred(*i)``.
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| Returns last if no such iterator is found.
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Examples
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========================================
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.. sourcecode:: c++
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#include <sprout/algorithm/find_if.hpp>
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#include <sprout/array.hpp>
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#include <sprout/container.hpp>
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#include <sprout/functional.hpp>
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using namespace sprout;
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SPROUT_STATIC_CONSTEXPR auto input = array<int, 10>{{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}};
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SPROUT_STATIC_CONSTEXPR auto result = sprout::find_if(begin(input), end(input), bind2nd(greater<>(), 7));
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static_assert(result != end(input), "found a element greater than 7 from input.");
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static_assert(*result == 8, "a found iterator is pointing to 8.");
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Complexity
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========================================
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| At most ``last - first`` applications of the predicate.
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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/find_if.hpp``
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| Convenience header: ``sprout/algorithm.hpp``
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