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Diffstat (limited to 'boost/algorithm/cxx11/find_if_not.hpp')
-rw-r--r-- | boost/algorithm/cxx11/find_if_not.hpp | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/boost/algorithm/cxx11/find_if_not.hpp b/boost/algorithm/cxx11/find_if_not.hpp new file mode 100644 index 0000000000..4beed00083 --- /dev/null +++ b/boost/algorithm/cxx11/find_if_not.hpp @@ -0,0 +1,60 @@ +/* + Copyright (c) Marshall Clow 2011-2012. + + 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) +*/ + +/// \file find_if_not.hpp +/// \brief Find the first element in a sequence that does not satisfy a predicate. +/// \author Marshall Clow + +#ifndef BOOST_ALGORITHM_FIND_IF_NOT_HPP +#define BOOST_ALGORITHM_FIND_IF_NOT_HPP + +#include <algorithm> // for std::find_if_not, if it exists + +#include <boost/range/begin.hpp> +#include <boost/range/end.hpp> + +namespace boost { namespace algorithm { + +#if __cplusplus >= 201103L +// Use the C++11 versions of find_if_not if it is available +using std::find_if_not; // Section 25.2.5 +#else +/// \fn find_if_not(InputIterator first, InputIterator last, Predicate p) +/// \brief Finds the first element in the sequence that does not satisfy the predicate. +/// \return The iterator pointing to the desired element. +/// +/// \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 range +/// \note This function is part of the C++2011 standard library. +/// We will use the standard one if it is available, +/// otherwise we have our own implementation. +template<typename InputIterator, typename Predicate> +InputIterator find_if_not ( InputIterator first, InputIterator last, Predicate p ) +{ + for ( ; first != last; ++first ) + if ( !p(*first)) + break; + return first; +} +#endif + +/// \fn find_if_not ( const Range &r, Predicate p ) +/// \brief Finds the first element in the sequence that does not satisfy the predicate. +/// \return The iterator pointing to the desired element. +/// +/// \param r The input range +/// \param p A predicate for testing the elements of the range +/// +template<typename Range, typename Predicate> +typename boost::range_iterator<const Range>::type find_if_not ( const Range &r, Predicate p ) +{ + return boost::algorithm::find_if_not (boost::begin (r), boost::end(r), p); +} + +}} +#endif // BOOST_ALGORITHM_FIND_IF_NOT_HPP |