@Ifndef - If Not Defined Directive

Syntax

@IFNDEF id {block}

id - An identifier

block - A valid block of text

Use

@IFNDEF includes the text contained within the block if the identifier is undefined. Thus, if no declaration (pin, node, device, macro or constant) has been made for the identifier, the text in the block will be inserted into the source file.

Example

@IFNDEF A {BASE = ^hE000;"
"if A is not defined, the block is inserted in the text