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136 lines
3.3 KiB
C++
136 lines
3.3 KiB
C++
// Boost.Range library
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//
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// Copyright Thorsten Ottosen 2003-2004. Use, modification and
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// distribution is subject to the Boost Software License, Version
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// 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//
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// For more information, see http://www.boost.org/libs/range/
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//
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#ifndef BOOST_RANGE_BEGIN_HPP
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#define BOOST_RANGE_BEGIN_HPP
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#if defined(_MSC_VER)
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# pragma once
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#endif
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#include <boost/range/config.hpp>
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#ifdef BOOST_NO_FUNCTION_TEMPLATE_ORDERING
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#include <boost/range/detail/begin.hpp>
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#else
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#include <boost/range/iterator.hpp>
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namespace boost
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{
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#if !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564))
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namespace range_detail
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{
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#endif
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//////////////////////////////////////////////////////////////////////
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// primary template
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//////////////////////////////////////////////////////////////////////
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template< typename C >
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inline BOOST_DEDUCED_TYPENAME range_iterator<C>::type
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range_begin( C& c )
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{
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//
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// If you get a compile-error here, it is most likely because
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// you have not implemented range_begin() properly in
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// the namespace of C
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//
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return c.begin();
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}
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//////////////////////////////////////////////////////////////////////
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// pair
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//////////////////////////////////////////////////////////////////////
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template< typename Iterator >
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inline Iterator range_begin( const std::pair<Iterator,Iterator>& p )
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{
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return p.first;
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}
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template< typename Iterator >
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inline Iterator range_begin( std::pair<Iterator,Iterator>& p )
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{
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return p.first;
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}
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//////////////////////////////////////////////////////////////////////
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// array
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//////////////////////////////////////////////////////////////////////
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//
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// May this be discarded? Or is it needed for bad compilers?
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//
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template< typename T, std::size_t sz >
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inline const T* range_begin( const T (&a)[sz] )
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{
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return a;
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}
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template< typename T, std::size_t sz >
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inline T* range_begin( T (&a)[sz] )
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{
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return a;
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}
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#if !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564))
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} // namespace 'range_detail'
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#endif
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// Use a ADL namespace barrier to avoid ambiguity with other unqualified
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// calls. This is particularly important with C++0x encouraging
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// unqualified calls to begin/end.
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namespace range_adl_barrier
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{
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template< class T >
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inline BOOST_DEDUCED_TYPENAME range_iterator<T>::type begin( T& r )
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{
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#if !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564))
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using namespace range_detail;
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#endif
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return range_begin( r );
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}
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template< class T >
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inline BOOST_DEDUCED_TYPENAME range_iterator<const T>::type begin( const T& r )
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{
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#if !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564))
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using namespace range_detail;
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#endif
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return range_begin( r );
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}
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} // namespace range_adl_barrier
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} // namespace boost
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#endif // BOOST_NO_FUNCTION_TEMPLATE_ORDERING
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namespace boost
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{
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namespace range_adl_barrier
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{
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template< class T >
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inline BOOST_DEDUCED_TYPENAME range_iterator<const T>::type
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const_begin( const T& r )
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{
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return boost::range_adl_barrier::begin( r );
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}
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} // namespace range_adl_barrier
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using namespace range_adl_barrier;
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} // namespace boost
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#endif
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