Pattern to match control characters

Contract
Parameter key	Default value	Type
a_type	opt
regex_string	"[\x00-\x1F\x7F]"	string

Water Contract
<class pattern.control regex_string ="[\x00-\x1F\x7F]"=string _native_object=<ja.org.apache.regexp.RE/> />

See also: is_type_for, get_string_segments, replace_string_segments, string_segment, printing

Returns a pattern with a regex_string field set to " [\x00-\x1F\x7F] ", character codes 0 through 31, and character 127. This pattern is useful for matching these control characters in the target string.

Example: String contains control characters

<pattern  pattern.<one_or_more pattern.control /> />.
<is_type_for <join char.tab "Abc " char.carriage_return char.newline /> />

true

Example: Does not contain control characters

<pattern pattern.<one_or_more pattern.control /> />.
<is_type_for <join "xyz123!@" /> />

false