1/*
2 Copyright (c) Marshall Clow 2008-2012.
3
4 Distributed under the Boost Software License, Version 1.0. (See accompanying
5 file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
6*/
7
8/// \file all_of.hpp
9/// \brief Test ranges to see if all elements match a value or predicate.
10/// \author Marshall Clow
11
12#ifndef BOOST_ALGORITHM_ALL_OF_HPP
13#define BOOST_ALGORITHM_ALL_OF_HPP
14
15#include <boost/config.hpp>
16#include <boost/range/begin.hpp>
17#include <boost/range/end.hpp>
18
19namespace boost { namespace algorithm {
20
21/// \fn all_of ( InputIterator first, InputIterator last, Predicate p )
22/// \return true if all elements in [first, last) satisfy the predicate 'p'
23/// \note returns true on an empty range
24///
25/// \param first The start of the input sequence
26/// \param last One past the end of the input sequence
27/// \param p A predicate for testing the elements of the sequence
28///
29/// \note This function is part of the C++2011 standard library.
30template<typename InputIterator, typename Predicate>
31BOOST_CXX14_CONSTEXPR bool all_of ( InputIterator first, InputIterator last, Predicate p )
32{
33 for ( ; first != last; ++first )
34 if ( !p(*first))
35 return false;
36 return true;
37}
38
39/// \fn all_of ( const Range &r, Predicate p )
40/// \return true if all elements in the range satisfy the predicate 'p'
41/// \note returns true on an empty range
42///
43/// \param r The input range
44/// \param p A predicate for testing the elements of the range
45///
46template<typename Range, typename Predicate>
47BOOST_CXX14_CONSTEXPR bool all_of ( const Range &r, Predicate p )
48{
49 return boost::algorithm::all_of ( boost::begin (r), boost::end (r), p );
50}
51
52/// \fn all_of_equal ( InputIterator first, InputIterator last, const T &val )
53/// \return true if all elements in [first, last) are equal to 'val'
54/// \note returns true on an empty range
55///
56/// \param first The start of the input sequence
57/// \param last One past the end of the input sequence
58/// \param val A value to compare against
59///
60template<typename InputIterator, typename T>
61BOOST_CXX14_CONSTEXPR bool all_of_equal ( InputIterator first, InputIterator last, const T &val )
62{
63 for ( ; first != last; ++first )
64 if ( val != *first )
65 return false;
66 return true;
67}
68
69/// \fn all_of_equal ( const Range &r, const T &val )
70/// \return true if all elements in the range are equal to 'val'
71/// \note returns true on an empty range
72///
73/// \param r The input range
74/// \param val A value to compare against
75///
76template<typename Range, typename T>
77BOOST_CXX14_CONSTEXPR bool all_of_equal ( const Range &r, const T &val )
78{
79 return boost::algorithm::all_of_equal ( boost::begin (r), boost::end (r), val );
80}
81
82}} // namespace boost and algorithm
83
84#endif // BOOST_ALGORITHM_ALL_OF_HPP
85

source code of include/boost/algorithm/cxx11/all_of.hpp