[fpc-pascal] precedence "is" and "and"

[Martin Wynne]

> var
>    b: boolean;
>    o: TObject;
> begin
>    // this compiles, but should fail:
>    if o is TComponent and b then ;


It will compile if $BOOLEVAL is on the default (-) because the result 
can be determined without considering precedence, see:

   https://www.freepascal.org/docs-html/prog/progsu4.html

Try it the other way round and it will fail:

o: TComponent;
if o is TObject

Martin.