Pathmaker Reference Manual

Macro Definition and Commands
Macro Language
067869 Tandem Computers Incorporated 3–7
IF Use the IF command to accomplish conditional use of source lines.
% IF [NOT] boolean-expression [{AND} [NOT] boolean-expression ]
{OR }
USE scope
NOT
specifies that the IF condition is met if boolean-expression is NOT true.
boolean-expression
is
{variable-name } {= | < | > | <= | >= | <> |} {variable-name }
{arithmetic-expression }{arithmetic-expression }
{alphanumeric string } {alphanumeric string }
The IF condition is met if boolean-expression evaluates to true.
scope
is one of the following:
digits LINES
where digits is a decimal number that gives the number of lines to be
controlled following the IF command. The line count includes source lines,
command lines, and comment lines.
LINES UNTIL TAG label
where label is an alphanumeric string (including -), at most 30 characters
long, which must begin with a letter and cannot end in a hyphen. When this
form of scope is used, a tag must be inserted to terminate scope, as follows:
%END-IF label
where label matches the label specified in the IF command.
If the IF condition is not met, that is, evaluates to false, the lines of the file controlled
by scope are skipped. No lines of source code are generated for them and no
embedded commands are executed.