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Embedded Template Library
Types
type_list

type_list

Header: type_list.h
From: 20.39.5

Defines a tuple of types, but unlike a tuple, does not contain any values.
This is an empty class.
Valid for C++11 and above.

type_list 

etl::type_select<typename... TTypes>

Creates a tuple of types from a set of template type parameters.

Member types

index_sequence_type The index_sequence type for this type_list.

Type list creation

Using global types

template <typename TTypeList, size_t... Indices>
type_list_select

Defines a new type_list by selecting types from a given type_list, according to an index sequence.

template <typename... TTypeLists>
type_list_cat

Defines a new type list by concatenating a list of etl::type_list objects.
std::tuple style access.

Type list properties

Using member types 

static constexpr size_t size();

Returns the number of types in the type list.

Using global types 

template <typename TTypelist>
type_list_size

Defines value as the size of the type list.
tuple style access.

template <typename TTypelist>
type_list_size_v

C++17 and above.

etl::nth_type<size_t N, typename TTypeList>

Defines the nth type in the type list.

template <typename TFromList, typename TToList>
type_lists_are_convertible

Checks that types in a type_list are convertible to the type in another.
Defines value as true or false.
From: 20.43.0

template <typename TFromList, typename TToList>
type_lists_are_convertible_v

C++17 and above.
From: 20.43.0

Examples 

using TypeList1 = etl::type_list<char, short, int, long>
using TypeList2 = etl::type_list<float, double>
using TypeList3 = etl::type_list<unsigned char, unsigned short>

Using member types 

// Get the size of TypeList1
constexpr size_t typeList1Size = TypeList1::size();

Using tuple style global types 

// Get the size of TypeList1
constexpr size_t typeList1Size = etl::type_list_size_v<TypeList1>;

// Define the type list 
// etl::type_list<char, short, int, long, float, double, unsigned char, unsigned short>
using Concatenated = etl::type_list_cat<TypeList1, TypeList2, TypeList3>
type_deftype_select