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58 lines
1.7 KiB
ReStructuredText
58 lines
1.7 KiB
ReStructuredText
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.. _sprout-algorithm-clamp:
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###############################################################################
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clamp
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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 T>
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inline SPROUT_CONSTEXPR T const&
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clamp(T const& value, typename sprout::identity<T>::type const& low, typename sprout::identity<T>::type const& high);
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template<typename T, typename Compare>
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inline SPROUT_CONSTEXPR T const&
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clamp(T const& value, typename sprout::identity<T>::type const& low, typename sprout::identity<T>::type const& high, Compare comp);
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Requires
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========================================
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| Type T is LessThanComparable.
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Returns
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========================================
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| low if the following corresponding conditions hold: ``value < low``, ``comp(value, low)``.
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| high if the following corresponding conditions hold: ``high < value``, ``comp(high, value)``.
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| Otherwise, returns value.
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Remarks
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========================================
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| Using clamp with floating point numbers may give unexpected results if one of the values is NaN.
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Complexity
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========================================
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| Exactly one or two comparisons.
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Examples
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========================================
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.. sourcecode:: c++
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#include <sprout/algorithm/clamp.hpp>
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#include <sprout/array.hpp>
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using namespace sprout;
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SPROUT_STATIC_CONSTEXPR auto input = array<int, 10>{{0, 10}};
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SPROUT_STATIC_CONSTEXPR auto result = sprout::clamp(20, input[0], input[1]);
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static_assert(result == 10, "clamped value is 10.");
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Header
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========================================
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| ``sprout/algorithm/clamp.hpp``
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| Convenience header: ``sprout/algorithm.hpp``
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