HP SunSoft Pascal 4.0 The %if Directive

A

	Comments
	If the compiler encounters an %exit directive within an include file, it stops
	processing the include file, but continues processing the source file in which
	it is included. In effect, %exit is equivalent to an end-of-file marker.
	When the compiler processes an %exit directive within an %if or %ifdef
	construct, it closes all %if or %ifdefs before it stops processing the current
	file.
	Example
The Pascal program,
	program exit_directive(output);
exit_directive.p
	begin
	writeln('Hello, world!')
	end. { exit_directive }
	%exit
	Everything after the %exit is ignored.
	So you can put anything here.
The commands to compile and
	hostname% pc -xl exit_directive.p
execute exit_directive.p	hostname% a.out
	Hello, world!
	The %if Directive
	The %if directive is a conditional branching directive.
	Syntax
	%if expression %then
	.
	.
	%end if

Pascal Preprocessor 257