IS-SDF-LIST( ) Analyze string against criteria for SDF lists

Domain: String functions/test functions

The IS-SDF-LIST( ) function analyzes whether a string expression is an SDF list of the format ’<element₁>,<element₂>,...,<element_ni>)' where <element> is a character sequence that must not contain any comma (except within parentheses).

Format

IS-SDF-LIST( )

STRING = string_expression

Result type

BOOLEAN

Input parameters

STRING = string_expression
Name of the string to be analyzed.

Result

TRUE
The string expression is an SDF list.

FALSE
The string expression is not an SDF list.

Error messages

No error messages

Example

/A=IS-SDF-LIST('(val1,val2)')
SHOW-VAR A
A = TRUE

/A=IS-SDF-LIST('val')
/SHOW-VAR A
A = FALSE