lite::sub_pack< pack_type_, keep0_..., keepN_ > Class Template Reference
[Tool Classes]

This class can be used to define and extract a subset of element of a pack as another pack. More...

#include <array.hpp>

List of all members.

Public Types
typedef pack_type_	input_pack_type
	The original pack type.
typedef pack<...>	type
	The subset pack type.
Static Public Member Functions
static void	set (type &res, input_pack_type::type0 a0,..., input_pack_type::typeN aN)
	Set the elements of res using only the corresponding elements from a0 to aN.
static void	set (type &res, const input_pack_type &org)
	Set the elements of res using only the corresponding elements from org.

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Detailed Description

template<typename pack_type_, bool keep0_..., bool keepN_>
class lite::sub_pack< pack_type_, keep0_..., keepN_ >

This class can be used to define and extract a subset of element of a pack as another pack.

The following is te pseudo class definition of the sub_pack class.

template<typename type0_, ..., typename typeN_, bool keep0_, ..., bool keepN_>
class sub_pack<pack<type0_, ... , typeN_>, keep0_, ..., keepN_>
{
public:
    typedef pack<type0_, ... , typeN_> input_pack_type;

    typedef pack<???> type; // for each X in in [0, N], typeX_ is included only if keepX_ is true.

    static void set(type& res, input_pack_type::type0 a0, ..., input_pack_type::typeN aN);

    static void set(type& res, const input_pack_type& org);
};

Example:

        typedef pack<int, constant<int, 5>, std::string> Pack;
        typedef sub_pack<Pack, true, true, false> SubPack;

        Pack p(1, 0, "hello");
        SubPack::type sub_p;

        SubPack::set(sub_p, p);
        std::cout << p << std::endl;
        std::cout << sub_p << std::endl;

The output would be:

        1 5 hello
        1 5
    

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The documentation for this class was generated from the following file:

• array.hpp