HP SunSoft Pascal 4.0 Manuel d'utilisateur télécharger pdf (Page 47)

The Pascal Compiler 23

If no values have been pushed onto the stack, the effect of * is undeﬁned.

Figure 3-2 illustrates how options are passed in program text.

Figure 3-2 Options in Program Text

Options

This section describes all the pc command options in alphabetical order.

Unless otherwise stated at the beginning of the description for the option, all of

these options work for both the Solaris 1.x and Solaris 2.x environments.

In general, processing of the compiler options is from left to right, so selective

overriding of macros can be done. This rule does not apply to linker options.

When the compiler encounters an

option followed by... This is what happens...

+ The current value is pushed onto the stack, and

the current value becomes ON.

The current value is pushed onto the stack, and

the current value becomes OFF.

The last value is popped off the stack and

becomes the current value.

program options (output);

begin

{$l+ Turns on listing}

writeln ('After $l-');

{$l- Turns off listing}

{Notice that this line prints.}

writeln ('After $l+');

{$l* Turns listing on again}

{Notice that this line does not print.}

writeln ('After $l*')

end.

hostname% pc options.p

Fri Mar 1 17:33:18 1995 options.p:

4 writeln ('After $l-');

5 {$l- Turns off listing}

6 {Notice that this line prints.}

10 writeln ('After $l*')

11 end.

Program: Output:

1 2 ... 42 43 44 45 46 47 48 49 50 51 52 ... 332 333

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HP SunSoft Pascal 4.0 Manuel d'utilisateur Page 47