[array.zero]

# 23 Containers library [[containers]](./#containers)

## 23.3 Sequence containers [[sequences]](sequences#array.zero)

### 23.3.3 Class template array [[array]](array#zero)

#### 23.3.3.5 Zero-sized arrays [array.zero]

[1](#1)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/containers.tex#L6319)

array shall provide support for the special case N == 0[.](#1.sentence-1)

[2](#2)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/containers.tex#L6322)

In the case that N == 0, begin() == end() == unique value[.](#2.sentence-1)

The return value of data() is unspecified[.](#2.sentence-2)

[3](#3)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/containers.tex#L6326)

The effect of calling front() or back() for a zero-sized array is
undefined[.](#3.sentence-1)

[4](#4)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/containers.tex#L6330)

Member function swap() shall have a
non-throwing exception specification[.](#4.sentence-1)