tuples.hpp

C++的一个好库。。。现在很流行

//      This class wraps an integer in a type to be used for indexing
//      the Nth element in a tuple. See tuple operator[]. Some
//      predefined names are provided in sub-namespace
//      tuple_index_names.
//
///////////////////////////////////////////////////////////////////////////////
template <int N>
struct tuple_index {};

//////////////////////////////////
namespace tuple_index_names {

    tuple_index<0> const _1 = tuple_index<0>();
    tuple_index<1> const _2 = tuple_index<1>();
    tuple_index<2> const _3 = tuple_index<2>();

#if PHOENIX_LIMIT > 3
    tuple_index<3> const _4 = tuple_index<3>();
    tuple_index<4> const _5 = tuple_index<4>();
    tuple_index<5> const _6 = tuple_index<5>();

#if PHOENIX_LIMIT > 6
    tuple_index<6> const _7 = tuple_index<6>();
    tuple_index<7> const _8 = tuple_index<7>();
    tuple_index<8> const _9 = tuple_index<8>();

#if PHOENIX_LIMIT > 9
    tuple_index<9> const _10 = tuple_index<9>();
    tuple_index<10> const _11 = tuple_index<10>();
    tuple_index<11> const _12 = tuple_index<11>();

#if PHOENIX_LIMIT > 12
    tuple_index<12> const _13 = tuple_index<12>();
    tuple_index<13> const _14 = tuple_index<13>();
    tuple_index<14> const _15 = tuple_index<14>();

#endif
#endif
#endif
#endif
}

///////////////////////////////////////////////////////////////////////////////
//
//  tuple_common class
//
///////////////////////////////////////////////////////////////////////////////
template <typename DerivedT>
struct tuple_base {

    typedef nil_t   a_type;
    typedef nil_t   b_type;
    typedef nil_t   c_type;

#if PHOENIX_LIMIT > 3
    typedef nil_t   d_type;
    typedef nil_t   e_type;
    typedef nil_t   f_type;

#if PHOENIX_LIMIT > 6
    typedef nil_t   g_type;
    typedef nil_t   h_type;
    typedef nil_t   i_type;

#if PHOENIX_LIMIT > 9
    typedef nil_t   j_type;
    typedef nil_t   k_type;
    typedef nil_t   l_type;

#if PHOENIX_LIMIT > 12
    typedef nil_t   m_type;
    typedef nil_t   n_type;
    typedef nil_t   o_type;

#endif
#endif
#endif
#endif

    template <int N>
    typename tuple_element<N, DerivedT>::crtype
    operator[](tuple_index<N>) const
    {
        return tuple_element<N, DerivedT>
            ::get(*static_cast<DerivedT const*>(this));
    }

    template <int N>
    typename tuple_element<N, DerivedT>::rtype
    operator[](tuple_index<N>)
    {
        return tuple_element<N, DerivedT>
            ::get(*static_cast<DerivedT*>(this));
    }
};

///////////////////////////////////////////////////////////////////////////////
//
//  tuple <0 member> class
//
///////////////////////////////////////////////////////////////////////////////
template <>
struct tuple<>
:   public tuple_base<tuple<> > {

    BOOST_STATIC_CONSTANT(int, length = 0);
};

///////////////////////////////////////////////////////////////////////////////
//
//  tuple <1 member> class
//
///////////////////////////////////////////////////////////////////////////////
template <typename A>
struct tuple<A, nil_t, nil_t,
#if PHOENIX_LIMIT > 3
    nil_t, nil_t, nil_t,
#if PHOENIX_LIMIT > 6
    nil_t, nil_t, nil_t,
#if PHOENIX_LIMIT > 9
    nil_t, nil_t, nil_t,
#if PHOENIX_LIMIT > 12
    nil_t, nil_t, nil_t,
#endif
#endif
#endif
#endif
    nil_t   //  Unused
>
:   public tuple_base<tuple<A> > {

    BOOST_STATIC_CONSTANT(int, length = 1);
    typedef A a_type;

    tuple() {}

    tuple(
        typename call_traits<A>::param_type a_
    ):  a(a_) {}

    template <typename TupleT>
    tuple(TupleT const& init)
    :   a(init[tuple_index<0>()])
    { BOOST_STATIC_ASSERT(TupleT::length == length); }

    A a;
};

///////////////////////////////////////////////////////////////////////////////
//
//  tuple <2 member> class
//
///////////////////////////////////////////////////////////////////////////////
template <typename A, typename B>
struct tuple<A, B, nil_t,
#if PHOENIX_LIMIT > 3
    nil_t, nil_t, nil_t,
#if PHOENIX_LIMIT > 6
    nil_t, nil_t, nil_t,
#if PHOENIX_LIMIT > 9
    nil_t, nil_t, nil_t,
#if PHOENIX_LIMIT > 12
    nil_t, nil_t, nil_t,
#endif
#endif
#endif
#endif
    nil_t   //  Unused
>
:   public tuple_base<tuple<A, B> > {

    BOOST_STATIC_CONSTANT(int, length = 2);
    typedef A a_type; typedef B b_type;

    tuple() {}

    tuple(
        typename call_traits<A>::param_type a_,
        typename call_traits<B>::param_type b_
    ):  a(a_), b(b_) {}

    template <typename TupleT>
    tuple(TupleT const& init)
    :   a(init[tuple_index<0>()]), b(init[tuple_index<1>()])
    { BOOST_STATIC_ASSERT(TupleT::length == length); }

    A a; B b;
};

///////////////////////////////////////////////////////////////////////////////
//
//  tuple <3 member> class
//
///////////////////////////////////////////////////////////////////////////////
template <typename A, typename B, typename C>
struct tuple<A, B, C,
#if PHOENIX_LIMIT > 3
    nil_t, nil_t, nil_t,
#if PHOENIX_LIMIT > 6
    nil_t, nil_t, nil_t,
#if PHOENIX_LIMIT > 9
    nil_t, nil_t, nil_t,
#if PHOENIX_LIMIT > 12
    nil_t, nil_t, nil_t,
#endif
#endif
#endif
#endif
    nil_t   //  Unused
>
:   public tuple_base<tuple<A, B, C> > {

    BOOST_STATIC_CONSTANT(int, length = 3);
    typedef A a_type; typedef B b_type;
    typedef C c_type;

    tuple() {}

    tuple(
        typename call_traits<A>::param_type a_,
        typename call_traits<B>::param_type b_,
        typename call_traits<C>::param_type c_
    ):  a(a_), b(b_), c(c_) {}

    template <typename TupleT>
    tuple(TupleT const& init)
    :   a(init[tuple_index<0>()]), b(init[tuple_index<1>()]),
        c(init[tuple_index<2>()])
    { BOOST_STATIC_ASSERT(TupleT::length == length); }

    A a; B b; C c;
};

#if PHOENIX_LIMIT > 3
///////////////////////////////////////////////////////////////////////////////
//
//  tuple <4 member> class
//
///////////////////////////////////////////////////////////////////////////////
template <typename A, typename B, typename C, typename D>
struct tuple<A, B, C, D, nil_t, nil_t,
#if PHOENIX_LIMIT > 6
    nil_t, nil_t, nil_t,
#if PHOENIX_LIMIT > 9
    nil_t, nil_t, nil_t,
#if PHOENIX_LIMIT > 12
    nil_t, nil_t, nil_t,
#endif
#endif
#endif
    nil_t   //  Unused
>
:   public tuple_base<tuple<A, B, C, D> > {

    BOOST_STATIC_CONSTANT(int, length = 4);
    typedef A a_type; typedef B b_type;
    typedef C c_type; typedef D d_type;

    tuple() {}

    tuple(
        typename call_traits<A>::param_type a_,
        typename call_traits<B>::param_type b_,
        typename call_traits<C>::param_type c_,
        typename call_traits<D>::param_type d_
    ):  a(a_), b(b_), c(c_), d(d_) {}

    template <typename TupleT>
    tuple(TupleT const& init)
    :   a(init[tuple_index<0>()]), b(init[tuple_index<1>()]),
        c(init[tuple_index<2>()]), d(init[tuple_index<3>()])
    { BOOST_STATIC_ASSERT(TupleT::length == length); }

    A a; B b; C c; D d;
};

///////////////////////////////////////////////////////////////////////////////
//
//  tuple <5 member> class
//
///////////////////////////////////////////////////////////////////////////////
template <typename A, typename B, typename C, typename D, typename E>
struct tuple<A, B, C, D, E, nil_t,
#if PHOENIX_LIMIT > 6
    nil_t, nil_t, nil_t,
#if PHOENIX_LIMIT > 9
    nil_t, nil_t, nil_t,
#if PHOENIX_LIMIT > 12
    nil_t, nil_t, nil_t,
#endif
#endif
#endif
    nil_t   //  Unused
>
:   public tuple_base<tuple<A, B, C, D, E> > {

    BOOST_STATIC_CONSTANT(int, length = 5);
    typedef A a_type; typedef B b_type;
    typedef C c_type; typedef D d_type;
    typedef E e_type;

    tuple() {}

    tuple(
        typename call_traits<A>::param_type a_,
        typename call_traits<B>::param_type b_,
        typename call_traits<C>::param_type c_,
        typename call_traits<D>::param_type d_,
        typename call_traits<E>::param_type e_
    ):  a(a_), b(b_), c(c_), d(d_), e(e_) {}

    template <typename TupleT>
    tuple(TupleT const& init)
    :   a(init[tuple_index<0>()]), b(init[tuple_index<1>()]),
        c(init[tuple_index<2>()]), d(init[tuple_index<3>()]),
        e(init[tuple_index<4>()])
    { BOOST_STATIC_ASSERT(TupleT::length == length); }

    A a; B b; C c; D d; E e;
};

///////////////////////////////////////////////////////////////////////////////
//
//  tuple <6 member> class
//
///////////////////////////////////////////////////////////////////////////////
template <
    typename A, typename B, typename C, typename D, typename E,
    typename F>
struct tuple<A, B, C, D, E, F,
#if PHOENIX_LIMIT > 6
    nil_t, nil_t, nil_t,
#if PHOENIX_LIMIT > 9
    nil_t, nil_t, nil_t,
#if PHOENIX_LIMIT > 12
    nil_t, nil_t, nil_t,
#endif
#endif
#endif
    nil_t   //  Unused
>
:   public tuple_base<tuple<A, B, C, D, E, F> > {

    BOOST_STATIC_CONSTANT(int, length = 6);
    typedef A a_type; typedef B b_type;
    typedef C c_type; typedef D d_type;
    typedef E e_type; typedef F f_type;

    tuple() {}

    tuple(
        typename call_traits<A>::param_type a_,
        typename call_traits<B>::param_type b_,
        typename call_traits<C>::param_type c_,
        typename call_traits<D>::param_type d_,
        typename call_traits<E>::param_type e_,
        typename call_traits<F>::param_type f_
    ):  a(a_), b(b_), c(c_), d(d_), e(e_),
        f(f_) {}

    template <typename TupleT>
    tuple(TupleT const& init)
    :   a(init[tuple_index<0>()]), b(init[tuple_index<1>()]),
        c(init[tuple_index<2>()]), d(init[tuple_index<3>()]),
        e(init[tuple_index<4>()]), f(init[tuple_index<5>()])
    { BOOST_STATIC_ASSERT(TupleT::length == length); }

    A a; B b; C c; D d; E e;
    F f;
};

#if PHOENIX_LIMIT > 6
///////////////////////////////////////////////////////////////////////////////
//
//  tuple <7 member> class
//
///////////////////////////////////////////////////////////////////////////////
template <
    typename A, typename B, typename C, typename D, typename E,
    typename F, typename G>
struct tuple<A, B, C, D, E, F, G, nil_t, nil_t,
#if PHOENIX_LIMIT > 9
    nil_t, nil_t, nil_t,
#if PHOENIX_LIMIT > 12
    nil_t, nil_t, nil_t,
#endif
#endif
    nil_t   //  Unused
>
:   public tuple_base<tuple<A, B, C, D, E, F, G> > {

    BOOST_STATIC_CONSTANT(int, length = 7);
    typedef A a_type; typedef B b_type;
    typedef C c_type; typedef D d_type;
    typedef E e_type; typedef F f_type;
    typedef G g_type;

    tuple() {}

    tuple(
        typename call_traits<A>::param_type a_,
        typename call_traits<B>::param_type b_,
        typename call_traits<C>::param_type c_,
        typename call_traits<D>::param_type d_,
        typename call_traits<E>::param_type e_,
        typename call_traits<F>::param_type f_,
        typename call_traits<G>::param_type g_
    ):  a(a_), b(b_), c(c_), d(d_), e(e_),
        f(f_), g(g_) {}

    template <typename TupleT>
    tuple(TupleT const& init)
    :   a(init[tuple_index<0>()]), b(init[tuple_index<1>()]),
        c(init[tuple_index<2>()]), d(init[tuple_index<3>()]),
        e(init[tuple_index<4>()]), f(init[tuple_index<5>()]),
        g(init[tuple_index<6>()])
    { BOOST_STATIC_ASSERT(TupleT::length == length); }

    A a; B b; C c; D d; E e;
    F f; G g;
};

///////////////////////////////////////////////////////////////////////////////
//
//  tuple <8 member> class
//
///////////////////////////////////////////////////////////////////////////////
template <
    typename A, typename B, typename C, typename D, typename E,
    typename F, typename G, typename H>
struct tuple<A, B, C, D, E, F, G, H, nil_t,
#if PHOENIX_LIMIT > 9
    nil_t, nil_t, nil_t,
#if PHOENIX_LIMIT > 12
    nil_t, nil_t, nil_t,
#endif
#endif
    nil_t   //  Unused
>
:   public tuple_base<tuple<A, B, C, D, E, F, G, H> > {

    BOOST_STATIC_CONSTANT(int, length = 8);
    typedef A a_type; typedef B b_type;
    typedef C c_type; typedef D d_type;