.UNDEFINE

Remove definition of replacement identifier

WSupported on Windows

USupported on Unix

VSupported on OpenVMS

NSupported in Synergy .NET

.UNDEFINE identifier

Arguments

identifier

The replacement identifier to be removed.

Discussion

The .UNDEFINE compilation control directive removes the definition of a replacement identifier.

If identifier is not defined in a prior .DEFINE directive line, the compiler generates an “Identifier not defined” warning (NOTDEF). You can suppress this warning by specifying the .DEFINE warning compiler option. See Compiling a traditional Synergy routine for more information about this compiler option.

Examples

.define DEBUG        ;This directive defines DEBUG in the symbol table
    .                 
    .
    .
.ifdef DEBUG         ;The following code will be compiled because DEBUG 
    .                ; is defined
    .
    .
.endc
.undefine DEBUG      ;This directive removes DEBUG from the symbol table
    .                
    .
    .
.ifdef DEBUG         ;The following code won't be compiled because DEBUG 
    .                ; is no longer defined.
    .
    .
.endc
.undefine DEBUG      ;This directive generates a compiler warning because 
                     ; DEBUG isn't defined