[re.regex.swap]

# 28 Text processing library [[text]](./#text)

## 28.6 Regular expressions library [[re]](re#regex.swap)

### 28.6.7 Class template basic_regex [[re.regex]](re.regex#swap)

#### 28.6.7.6 Swap [re.regex.swap]

[🔗](#lib:swap,basic_regex_)

`void swap(basic_regex& e);
`

[1](#1)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/text.tex#L10803)

*Effects*: Swaps the contents of the two regular expressions[.](#1.sentence-1)

[2](#2)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/text.tex#L10807)

*Postconditions*: *this contains the regular expression
that was in e, e contains the regular expression that
was in *this[.](#2.sentence-1)

[3](#3)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/text.tex#L10813)

*Complexity*: Constant time[.](#3.sentence-1)