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/detail/empty.hpp b/include/boost/range/detail/empty.hpp
new file mode 100644
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+++ b/include/boost/range/detail/empty.hpp
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+// Boost.Range library
+//
+// Copyright Thorsten Ottosen 2003-2004. 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_DETAIL_EMPTY_HPP
+#define BOOST_RANGE_DETAIL_EMPTY_HPP
+
+#include <boost/range/detail/common.hpp>
+
+namespace boost
+{
+ namespace range_detail
+ {
+ template< typename T >
+ struct range_empty;
+
+ //////////////////////////////////////////////////////////////////////
+ // default
+ //////////////////////////////////////////////////////////////////////
+
+ template<>
+ struct range_empty<std_container_>
+ {
+ template< typename C >
+ static bool fun( C& c )
+ {
+ return c.empty();
+ };
+ };
+
+ //////////////////////////////////////////////////////////////////////
+ // pair
+ //////////////////////////////////////////////////////////////////////
+
+ template<>
+ struct range_empty<std_pair_>
+ {
+ template< typename P >
+ static bool fun( const P& p )
+ {
+ return p.first == p.second;
+ }
+ };
+
+ //////////////////////////////////////////////////////////////////////
+ // array
+ //////////////////////////////////////////////////////////////////////
+
+ template<>
+ struct range_empty<array_>
+ {
+ template< typename T, std::size_t sz >
+ static bool fun( T BOOST_ARRAY_REF[sz] )
+ {
+ if( boost_range_array == 0 )
+ return true;
+ return false;
+ }
+ };
+
+ //////////////////////////////////////////////////////////////////////
+ // string
+ //////////////////////////////////////////////////////////////////////
+
+ template<>
+ struct range_empty<char_ptr_>
+ {
+ static bool fun( const char* s )
+ {
+ return s == 0 || s[0] == 0;
+ }
+ };
+
+ template<>
+ struct range_empty<const_char_ptr_>
+ {
+ static bool fun( const char* s )
+ {
+ return s == 0 || s[0] == 0;
+ }
+ };
+
+ template<>
+ struct range_empty<wchar_t_ptr_>
+ {
+ static bool fun( const wchar_t* s )
+ {
+ return s == 0 || s[0] == 0;
+ }
+ };
+
+ template<>
+ struct range_empty<const_wchar_t_ptr_>
+ {
+ static bool fun( const wchar_t* s )
+ {
+ return s == 0 || s[0] == 0;
+ }
+ };
+
+ } // namespace 'range_detail'
+
+
+ template< typename C >
+ inline bool
+ empty( const C& c )
+ {
+ return range_detail::range_empty< BOOST_RANGE_DEDUCED_TYPENAME range_detail::range<C>::type >::fun( c );
+ }
+
+} // namespace 'boost'
+
+
+#endif