73 lines
2.4 KiB
C++
73 lines
2.4 KiB
C++
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/*
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Copyright (c) Ivan Matek, Marshall Clow 2021.
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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*/
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/// \file is_clamped.hpp
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/// \brief IsClamped algorithm
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/// \authors Ivan Matek, Marshall Clow
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///
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#ifndef BOOST_ALGORITHM_IS_CLAMPED_HPP
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#define BOOST_ALGORITHM_IS_CLAMPED_HPP
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#include <functional> // for std::less
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#include <cassert>
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#include <boost/type_traits/type_identity.hpp> // for boost::type_identity
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namespace boost { namespace algorithm {
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/// \fn is_clamped ( T const& val,
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/// typename boost::type_identity<T>::type const & lo,
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/// typename boost::type_identity<T>::type const & hi, Pred p )
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/// \returns true if value "val" is in the range [ lo, hi ]
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/// using the comparison predicate p.
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/// If p ( val, lo ) return false.
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/// If p ( hi, val ) return false.
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/// Otherwise, returns true.
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///
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/// \param val The value to be checked
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/// \param lo The lower bound of the range
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/// \param hi The upper bound of the range
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/// \param p A predicate to use to compare the values.
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/// p ( a, b ) returns a boolean.
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///
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template <typename T, typename Pred>
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BOOST_CXX14_CONSTEXPR bool is_clamped(
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T const& val, typename boost::type_identity<T>::type const& lo,
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typename boost::type_identity<T>::type const& hi, Pred p) {
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// assert ( !p ( hi, lo )); // Can't assert p ( lo, hi ) b/c they
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// might be equal
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return p(val, lo) ? false : p(hi, val) ? false : true;
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}
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/// \fn is_clamped ( T const& val,
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/// typename boost::type_identity<T>::type const & lo,
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/// typename boost::type_identity<T>::type const & hi)
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/// \returns true if value "val" is in the range [ lo, hi ]
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/// using operator < for comparison.
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/// If the value is less than lo, return false.
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/// If the value is greater than hi, return false.
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/// Otherwise, returns true.
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///
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/// \param val The value to be checked
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/// \param lo The lower bound of the range
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/// \param hi The upper bound of the range
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///
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template<typename T>
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BOOST_CXX14_CONSTEXPR bool is_clamped ( const T& val,
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typename boost::type_identity<T>::type const & lo,
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typename boost::type_identity<T>::type const & hi )
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{
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return boost::algorithm::is_clamped ( val, lo, hi, std::less<T>());
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}
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}}
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#endif // BOOST_ALGORITHM_CLAMP_HPP
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