IS-SDF-STRUCTURE( ) Analyze string against criteria for SDF structures

Domain: String functions/test functions

The IS-SDF-STRUCTURE( ) function analyzes whether the specified string is an SDF structure.

The specified SDF structure must be introduced by a value. This value must not be omitted, or else the string will be regarded as an SDF list and not as an SDF structure.

Format

IS-SDF-STRUCTURE( )

STRING = string_expression

Result type

BOOLEAN

Input parameters

STRING = string_expression
Name of the string which is to be analyzed.

Result

TRUE
The specified string is an SDF structure.

FALSE
The specified string is not an SDF structure.

Error messages

No error messages

Example

/A=IS-SDF-STRUCTURE('*P(val1,val2)')
/SHOW-VAR A
A = TRUE
/A=IS-SDF-STRUCTURE('(val1,val2)')
A = FALSE

In this case the string will be regarded as an SDF list.

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