Index concepts
==============

.. contents:: Table of Contents
    :local:


.. _concept-Index:

Index
-----

Let `Idx` be a type that models :ref:`Index (details) <concept-details-Index>`.

Then `Idx` also models :ref:`SignedIntegral (fundamentals) <concept-fundamentals-core-language-SignedIntegral>`.

.. _concept-Index-expressions:
.. rubric:: Expressions

All expressions valid with the following C++ integral types are also valid :
    - `bool`
    - `char`
    - `unsigned char`
    - `char16_t`
    - `char32_t`
    - `wchar_t`
    - `unsigned wchar_t`
    - `short`
    - `unsigned short`
    - `int`
    - `unsigned int`
    - `long`
    - `unsigned long`
    - `long long`
    - `unsigned long long`
    - or any implementation-defined extended integer types, including any signed, unsigned, and cv-qualified variants.