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1 // tuple.hpp - Boost Tuple Library -------------------------------------- |
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2 |
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3 // Copyright (C) 1999, 2000 Jaakko Järvi (jaakko.jarvi@cs.utu.fi) |
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4 // |
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5 // Distributed under the Boost Software License, Version 1.0. (See |
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6 // accompanying file LICENSE_1_0.txt or copy at |
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7 // http://www.boost.org/LICENSE_1_0.txt) |
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8 |
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9 // For more information, see http://www.boost.org |
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10 |
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11 // ----------------------------------------------------------------- |
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12 |
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13 #ifndef BOOST_TUPLE_HPP |
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14 #define BOOST_TUPLE_HPP |
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15 |
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16 #if defined(__sgi) && defined(_COMPILER_VERSION) && _COMPILER_VERSION <= 730 |
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17 // Work around a compiler bug. |
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18 // boost::python::tuple has to be seen by the compiler before the |
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19 // boost::tuple class template. |
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20 namespace boost { namespace python { class tuple; }} |
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21 #endif |
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22 |
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23 #include "boost/config.hpp" |
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24 #include "boost/static_assert.hpp" |
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25 |
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26 #if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) |
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27 // The MSVC version |
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28 #include "boost/tuple/detail/tuple_basic_no_partial_spec.hpp" |
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29 |
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30 #else |
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31 // other compilers |
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32 #include "boost/ref.hpp" |
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33 #include "boost/tuple/detail/tuple_basic.hpp" |
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34 |
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35 #endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION |
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36 |
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37 namespace boost { |
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38 |
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39 using tuples::tuple; |
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40 using tuples::make_tuple; |
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41 using tuples::tie; |
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42 #if !defined(BOOST_NO_USING_TEMPLATE) |
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43 using tuples::get; |
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44 #elif !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) |
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45 // |
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46 // The "using tuples::get" statement causes the |
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47 // Borland compiler to ICE, use forwarding |
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48 // functions instead: |
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49 // |
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50 template<int N, class HT, class TT> |
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51 inline typename tuples::access_traits< |
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52 typename tuples::element<N, tuples::cons<HT, TT> >::type |
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53 >::non_const_type |
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54 get(tuples::cons<HT, TT>& c) { |
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55 return tuples::get<N,HT,TT>(c); |
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56 } |
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57 // get function for const cons-lists, returns a const reference to |
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58 // the element. If the element is a reference, returns the reference |
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59 // as such (that is, can return a non-const reference) |
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60 template<int N, class HT, class TT> |
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61 inline typename tuples::access_traits< |
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62 typename tuples::element<N, tuples::cons<HT, TT> >::type |
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63 >::const_type |
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64 get(const tuples::cons<HT, TT>& c) { |
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65 return tuples::get<N,HT,TT>(c); |
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66 } |
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67 #else // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION |
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68 // |
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69 // MSVC, using declarations don't mix with templates well, |
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70 // so use forwarding functions instead: |
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71 // |
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72 template<int N, typename Head, typename Tail> |
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73 typename tuples::detail::element_ref<N, tuples::cons<Head, Tail> >::RET |
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74 get(tuples::cons<Head, Tail>& t, tuples::detail::workaround_holder<N>* = 0) |
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75 { |
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76 return tuples::detail::get_class<N>::get(t); |
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77 } |
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78 |
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79 template<int N, typename Head, typename Tail> |
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80 typename tuples::detail::element_const_ref<N, tuples::cons<Head, Tail> >::RET |
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81 get(const tuples::cons<Head, Tail>& t, tuples::detail::workaround_holder<N>* = 0) |
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82 { |
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83 return tuples::detail::get_class<N>::get(t); |
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84 } |
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85 #endif // BOOST_NO_USING_TEMPLATE |
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86 |
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87 } // end namespace boost |
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88 |
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89 |
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90 #endif // BOOST_TUPLE_HPP |