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Diffstat (limited to 'boost/algorithm/cxx11/any_of.hpp')
-rw-r--r-- | boost/algorithm/cxx11/any_of.hpp | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/boost/algorithm/cxx11/any_of.hpp b/boost/algorithm/cxx11/any_of.hpp new file mode 100644 index 0000000000..c3ab3ce59f --- /dev/null +++ b/boost/algorithm/cxx11/any_of.hpp @@ -0,0 +1,90 @@ +/* + Copyright (c) Marshall Clow 2008-2012. + + Distributed under the Boost Software License, Version 1.0. (See accompanying + file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) + + For more information, see http://www.boost.org +*/ + +/// \file +/// \brief Test ranges to see if any elements match a value or predicate. +/// \author Marshall Clow + +#ifndef BOOST_ALGORITHM_ANY_OF_HPP +#define BOOST_ALGORITHM_ANY_OF_HPP + +#include <algorithm> // for std::any_of, if available +#include <boost/range/begin.hpp> +#include <boost/range/end.hpp> + +namespace boost { namespace algorithm { + +// Use the C++11 versions of any_of if it is available +#if __cplusplus >= 201103L +using std::any_of; // Section 25.2.2 +#else +/// \fn any_of ( InputIterator first, InputIterator last, Predicate p ) +/// \return true if any of the elements in [first, last) satisfy the predicate +/// \note returns false on an empty range +/// +/// \param first The start of the input sequence +/// \param last One past the end of the input sequence +/// \param p A predicate for testing the elements of the sequence +/// +template<typename InputIterator, typename Predicate> +bool any_of ( InputIterator first, InputIterator last, Predicate p ) +{ + for ( ; first != last; ++first ) + if ( p(*first)) + return true; + return false; +} +#endif + +/// \fn any_of ( const Range &r, Predicate p ) +/// \return true if any elements in the range satisfy the predicate 'p' +/// \note returns false on an empty range +/// +/// \param r The input range +/// \param p A predicate for testing the elements of the range +/// +template<typename Range, typename Predicate> +bool any_of ( const Range &r, Predicate p ) +{ + return boost::algorithm::any_of (boost::begin (r), boost::end (r), p); +} + +/// \fn any_of_equal ( InputIterator first, InputIterator last, const V &val ) +/// \return true if any of the elements in [first, last) are equal to 'val' +/// \note returns false on an empty range +/// +/// \param first The start of the input sequence +/// \param last One past the end of the input sequence +/// \param val A value to compare against +/// +template<typename InputIterator, typename V> +bool any_of_equal ( InputIterator first, InputIterator last, const V &val ) +{ + for ( ; first != last; ++first ) + if ( val == *first ) + return true; + return false; +} + +/// \fn any_of_equal ( const Range &r, const V &val ) +/// \return true if any of the elements in the range are equal to 'val' +/// \note returns false on an empty range +/// +/// \param r The input range +/// \param val A value to compare against +/// +template<typename Range, typename V> +bool any_of_equal ( const Range &r, const V &val ) +{ + return boost::algorithm::any_of_equal (boost::begin (r), boost::end (r), val); +} + +}} // namespace boost and algorithm + +#endif // BOOST_ALGORITHM_ANY_OF_HPP |