89 lines
2.8 KiB
C++
89 lines
2.8 KiB
C++
/*
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Copyright (c) Marshall Clow 2008-2012.
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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 none_of.hpp
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/// \brief Test ranges to see if no elements match a value or predicate.
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/// \author Marshall Clow
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#ifndef BOOST_ALGORITHM_NONE_OF_HPP
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#define BOOST_ALGORITHM_NONE_OF_HPP
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#include <algorithm> // for std::none_of, if available
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#include <boost/range/begin.hpp>
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#include <boost/range/end.hpp>
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namespace boost { namespace algorithm {
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// Use the C++11 versions of the none_of if it is available
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#if __cplusplus >= 201103L
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using std::none_of; // Section 25.2.3
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#else
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/// \fn none_of ( InputIterator first, InputIterator last, Predicate p )
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/// \return true if none of the elements in [first, last) satisfy the predicate 'p'
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/// \note returns true on an empty range
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///
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/// \param first The start of the input sequence
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/// \param last One past the end of the input sequence
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/// \param p A predicate for testing the elements of the sequence
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///
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template<typename InputIterator, typename Predicate>
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bool none_of ( InputIterator first, InputIterator last, Predicate p )
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{
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for ( ; first != last; ++first )
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if ( p(*first))
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return false;
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return true;
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}
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#endif
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/// \fn none_of ( const Range &r, Predicate p )
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/// \return true if none of the elements in the range satisfy the predicate 'p'
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/// \note returns true on an empty range
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///
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/// \param r The input range
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/// \param p A predicate for testing the elements of the range
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///
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template<typename Range, typename Predicate>
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bool none_of ( const Range &r, Predicate p )
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{
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return boost::algorithm::none_of (boost::begin (r), boost::end (r), p );
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}
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/// \fn none_of_equal ( InputIterator first, InputIterator last, const V &val )
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/// \return true if none of the elements in [first, last) are equal to 'val'
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/// \note returns true on an empty range
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///
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/// \param first The start of the input sequence
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/// \param last One past the end of the input sequence
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/// \param val A value to compare against
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///
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template<typename InputIterator, typename V>
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bool none_of_equal ( InputIterator first, InputIterator last, const V &val )
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{
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for ( ; first != last; ++first )
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if ( val == *first )
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return false;
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return true;
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}
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/// \fn none_of_equal ( const Range &r, const V &val )
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/// \return true if none of the elements in the range are equal to 'val'
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/// \note returns true on an empty range
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///
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/// \param r The input range
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/// \param val A value to compare against
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///
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template<typename Range, typename V>
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bool none_of_equal ( const Range &r, const V & val )
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{
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return boost::algorithm::none_of_equal (boost::begin (r), boost::end (r), val);
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}
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}} // namespace boost and algorithm
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#endif // BOOST_ALGORITHM_NONE_OF_HPP
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