Lists

Defined in list.hpp

This page gives an introduction to the nano::list type, see the examples and usage main page for all functionality.

Contents

• Introduction
• List Size
• Get

Introduction

Lists are the building block for everything that is nano. They are based off of what Alexandrescu calls typelists in Modern C++ Design, with slightly extended functionality.

The basis of the nano::list is that it hold types, these can be types such as int, double, float .., or with the numeric types defined by nano such as nano::int_t<> and nano::size_t<> -- which enable much more powerful metaprogramming.

Declaring lists is simple, for example, using a nano::list as a typelist can be done as follows:

using typelist = nano::list<int, float, double>;

But to really get the full functionality of nano, the numeric types should be used to create value lists, such as

using int_list = nano::list<nano::int_t<1>, nano::int_t<2>, nano::int_t<4>>;

List Size

Lists have size functionality, which is returned as std::size_t, the size of a list can be determined as follows:

using int_list = nano::list<nano::int_t<1>, nano::int_t<2>, nano::int_t<4>>;

// Get the size of the list
std::size_t list_size = int_list::size;

// list_size = 3 

Get

Nano provides the get function for gettting the value of a list element at a specific index. For example

using sizet_list = nano::list<nano::size_t<1>, nano::size_t<2>, nano::size_t<4>>;

// Get the first element of the list
using first_element = nano::get<0, sizet_list>;

// first_element = nano::size_t<1>;