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Diffstat (limited to 'ext/boost/range/detail/empty.hpp')
-rw-r--r-- | ext/boost/range/detail/empty.hpp | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/ext/boost/range/detail/empty.hpp b/ext/boost/range/detail/empty.hpp new file mode 100644 index 0000000000..b098705d16 --- /dev/null +++ b/ext/boost/range/detail/empty.hpp @@ -0,0 +1,120 @@ +// 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 |