Component bslmf_typelist [Package bslmf]

Provide a typelist component. More...

Namespaces
namespace	bslmf
Defines
#define	bslmf_TypeList   bslmf::TypeList
#define	bslmf_TypeListNil   bslmf::TypeListNil
#define	bslmf_TypeList1   bslmf::TypeList1
#define	bslmf_TypeList2   bslmf::TypeList2
#define	bslmf_TypeList3   bslmf::TypeList3
#define	bslmf_TypeList4   bslmf::TypeList4
#define	bslmf_TypeList5   bslmf::TypeList5
#define	bslmf_TypeList6   bslmf::TypeList6
#define	bslmf_TypeList7   bslmf::TypeList7
#define	bslmf_TypeList8   bslmf::TypeList8
#define	bslmf_TypeList9   bslmf::TypeList9
#define	bslmf_TypeList10   bslmf::TypeList10
#define	bslmf_TypeList11   bslmf::TypeList11
#define	bslmf_TypeList12   bslmf::TypeList12
#define	bslmf_TypeList13   bslmf::TypeList13
#define	bslmf_TypeList14   bslmf::TypeList14
#define	bslmf_TypeList15   bslmf::TypeList15
#define	bslmf_TypeList16   bslmf::TypeList16
#define	bslmf_TypeList17   bslmf::TypeList17
#define	bslmf_TypeList18   bslmf::TypeList18
#define	bslmf_TypeList19   bslmf::TypeList19
#define	bslmf_TypeList20   bslmf::TypeList20
#define	bslmf_TypeListTypeOf   bslmf::TypeListTypeOf
Typedefs
typedef bslmf::TypeList0	bslmf_TypeList0

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Detailed Description

Outline

• Purpose
• Classes
• Description
  • Usage

Purpose:

Provide a typelist component.

Classes:

bslmf::TypeList	Typelist of up to 20 types
bslmf::TypeListTypeOf	Meta-function to get the type of a typelist member
bslmf::TypeList0	Typelist of 0 types
bslmf::TypeList1	Typelist of 1 type
bslmf::TypeList2	Typelist of 2 types
bslmf::TypeList3	Typelist of 3 types
bslmf::TypeList4	Typelist of 4 types
bslmf::TypeList5	Typelist of 5 types
bslmf::TypeList6	Typelist of 6 types
bslmf::TypeList7	Typelist of 7 types
bslmf::TypeList8	Typelist of 8 types
bslmf::TypeList9	Typelist of 9 types
bslmf::TypeList10	Typelist of 10 types
bslmf::TypeList11	Typelist of 11 types
bslmf::TypeList12	Typelist of 12 types
bslmf::TypeList13	Typelist of 13 types
bslmf::TypeList14	Typelist of 14 types
bslmf::TypeList15	Typelist of 15 types
bslmf::TypeList16	Typelist of 16 types
bslmf::TypeList17	Typelist of 17 types
bslmf::TypeList18	Typelist of 18 types
bslmf::TypeList19	Typelist of 19 types
bslmf::TypeList20	Typelist of 20 types

Description:

bslmf::TypeList provides a compile time list that holds up to 20 types. Users can access the different types the list contains (by index), and the length of the typelist. A bslmf::TypeList is typically used when writing templatized classes that can store a variable amount of types, such as a bind or variant class.

Usage:

The following usage example demonstrates how to retrieve information from a bslmf::TypeList:

  typedef bslmf::TypeList<int, double, char> List;

We can access the length of the list using the LENGTH member:

  assert(3 == List::LENGTH);  // accessing the length of the list

We can also access the different types stored in the typelist using predefined type members TypeN (where 1 <= t_N <= 20), or another meta-function bslmf::TypeListTypeOf:

  assert(1 == bsl::is_same<int,    List::Type1>::value)
  assert(1 == bsl::is_same<double, List::Type2>::value)
  assert(1 == bsl::is_same<char,   List::Type3>::value)

  typedef bslmf::TypeListTypeOf<1, List>::Type my_Type1;
  typedef bslmf::TypeListTypeOf<2, List>::Type my_Type2;
  typedef bslmf::TypeListTypeOf<3, List>::Type my_Type3;

  assert(1 == bsl::is_same<int,    my_Type1>::value)
  assert(1 == bsl::is_same<double, my_Type2>::value)
  assert(1 == bsl::is_same<char,   my_Type3>::value)

---

Define Documentation

#define bslmf_TypeList   bslmf::TypeList

#define bslmf_TypeListNil   bslmf::TypeListNil

#define bslmf_TypeList1   bslmf::TypeList1

#define bslmf_TypeList2   bslmf::TypeList2

#define bslmf_TypeList3   bslmf::TypeList3

#define bslmf_TypeList4   bslmf::TypeList4

#define bslmf_TypeList5   bslmf::TypeList5

#define bslmf_TypeList6   bslmf::TypeList6

#define bslmf_TypeList7   bslmf::TypeList7

#define bslmf_TypeList8   bslmf::TypeList8

#define bslmf_TypeList9   bslmf::TypeList9

#define bslmf_TypeList10   bslmf::TypeList10

#define bslmf_TypeList11   bslmf::TypeList11

#define bslmf_TypeList12   bslmf::TypeList12

#define bslmf_TypeList13   bslmf::TypeList13

#define bslmf_TypeList14   bslmf::TypeList14

#define bslmf_TypeList15   bslmf::TypeList15

#define bslmf_TypeList16   bslmf::TypeList16

#define bslmf_TypeList17   bslmf::TypeList17

#define bslmf_TypeList18   bslmf::TypeList18

#define bslmf_TypeList19   bslmf::TypeList19

#define bslmf_TypeList20   bslmf::TypeList20

#define bslmf_TypeListTypeOf   bslmf::TypeListTypeOf

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Typedef Documentation

typedef bslmf::TypeList0 bslmf_TypeList0