[re.const.general]

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

## 28.6 Regular expressions library [[re]](re#const.general)

### 28.6.4 Namespace std​::​regex_constants [[re.const]](re.const#general)

#### 28.6.4.1 General [re.const.general]

[1](#1)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/text.tex#L9595)

The namespace std​::​regex_constants holds
symbolic constants used by the regular expression library[.](#1.sentence-1)

This
namespace provides three types, syntax_option_type,match_flag_type, and error_type, along with several
constants of these types[.](#1.sentence-2)
