Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world. — Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

This is an older version of Boost and was released in 2022. The current version is 1.90.0.

array::at (1 of 2 overloads)

array::at (1 of 2 overloads)

Access an element, with bounds checking.

Synopsis

value&
at(
    std::size_t pos);

Description

Returns a reference to the element specified at location pos, with bounds checking. If pos is not within the range of the container, an exception of type std::out_of_range is thrown.

Complexity

Constant.

Parameters

Name	Description
`pos`	A zero-based index.

Exceptions

Type	Thrown On
`std::out_of_range`	`pos >= size()`