Scripting Guide - SAS

578 JSL Syntax Reference Appendix A
Character Pattern Functions
Pat Not Any("string")
Description
Constructs a pattern that matches a single character that is not in the argument.
Returns
A pattern.
Argument
string a string.
Pat Pos(int)
Description
Constructs patterns that match the null string if the current position is int from the left end of the
string, and fail otherwise.
Returns
A pattern.
Argument
int an integer that specifies a position in a string.
Pat R Pos(int)
Description
Constructs patterns that match the null string if the current position is int from the right end of the
string, and fails otherwise.
Returns
A pattern.
Argument
int an integer that specifies a position in a string.
Pat R Tab(int)
Description
Constructs a pattern that matches up to position n from the end of the string. It can match 0 or more
characters. It fails if it would have to move backwards or beyond the end of the string.
Returns
A pattern.
Argument
int an integer that specifies a position in a string.
Pat Regex(string)
Description
Constructs a pattern that matches the regular expression in the quoted string argument.
Returns
A pattern.