1.2.31 $X or $EXTENDEDSYNTAX : Extended syntax

Extended syntax allows you to drop the result of a function. This means that you can use a function call as if it were a procedure. Standard this feature is on. You can switch it o using the f$X-g or f$EXTENDEDSYNTAX OFFgdirective.

The following, for instance, will not compile:

function Func (var Arg : sometype) : longint;
begin
... { declaration of Func }
end;

...

{$X-}
Func (A);

The reason this construct is supported is that you may wish to call a function for certain side-eects it has, but you don't need the function result. In this case you don't need to assign the function result, saving you an extra variable.

The command-line compiler switch -Sa1 has the same eect as the f$X+g directive.

By default, extended syntax is assumed.

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