The Regexp data type

The data type of regular expressions is Regexp. By default, Regexp matches any regular expression value. If you are looking for a type that matches strings which match arbitrary regular expressions, see the Pattern type. You can use parameters to restrict which values Regexp matches.

Parameters

The full signature for Regexp is:

Regexp[<SPECIFIC REGULAR EXPRESSION>]

The parameter is optional.

Position	Parameter	Data type	Default value	Description
1	Specific regular expression	Regexp	none	If specified, this results in a data type that only matches one specific regular expression value. Specifying a parameter here doesn’t have a practical use.

Examples:

• Regexp

  Matches any regular expression.

• Regexp[/<regex>/]

  Matches the regular expression /<regex>/ only.

Regexp matches only literal regular expression values. Don't confuse it with the abstract Pattern data type, which uses a regular expression to match a limited set of String values.