Squashed 'third_party/boostorg/range/' content from commit 4cfd4d8

Change-Id: I641c49f21039952b16f888223a952503e43a28a9
git-subtree-dir: third_party/boostorg/range
git-subtree-split: 4cfd4d8287ca949d7f29256adf3e796a0d1775ec
diff --git a/include/boost/range/algorithm/generate.hpp b/include/boost/range/algorithm/generate.hpp
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+++ b/include/boost/range/algorithm/generate.hpp
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+//  Copyright Neil Groves 2009. Use, modification and
+//  distribution is subject to 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/libs/range/
+//
+#ifndef BOOST_RANGE_ALGORITHM_GENERATE_HPP_INCLUDED
+#define BOOST_RANGE_ALGORITHM_GENERATE_HPP_INCLUDED
+
+#include <boost/concept_check.hpp>
+#include <boost/range/begin.hpp>
+#include <boost/range/end.hpp>
+#include <boost/range/concepts.hpp>
+#include <algorithm>
+
+namespace boost
+{
+    namespace range
+    {
+/// \brief template function generate
+///
+/// range-based version of the generate std algorithm
+///
+/// \pre ForwardRange is a model of the ForwardRangeConcept
+/// \pre Generator is a model of the UnaryFunctionConcept
+template< class ForwardRange, class Generator >
+inline ForwardRange& generate( ForwardRange& rng, Generator gen )
+{
+    BOOST_RANGE_CONCEPT_ASSERT(( ForwardRangeConcept<ForwardRange> ));
+    std::generate(boost::begin(rng), boost::end(rng), gen);
+    return rng;
+}
+
+/// \overload
+template< class ForwardRange, class Generator >
+inline const ForwardRange& generate( const ForwardRange& rng, Generator gen )
+{
+    BOOST_RANGE_CONCEPT_ASSERT(( ForwardRangeConcept<const ForwardRange> ));
+    std::generate(boost::begin(rng), boost::end(rng), gen);
+    return rng;
+}
+
+    } // namespace range
+    using range::generate;
+} // namespace boost
+
+#endif // include guard