PBASIC 2.5 and labels

Don

I downloaded the short document the PBasic 2.5 features.· I was a bit puzzled by the discussion of labels requiring a colon.· I thought that labels have always required a colon.· It this not true?· If not, in what circumstances would you want to use a label without a colon?

Perhaps not requiring a colon on labels was an oversight/bug in versions prior to 2.5.

·

Jon Williams

Indeed, earlier versions of the compiler tolerated labels without colons. Enforcement was added to promote clean coding.

Colons can also be used as a separater for multi-line statements, like this:

· DO : LOOP UNTIL (ResetBtn = Pressed)

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Jon Williams
Applications Engineer, Parallax
Dallas Office

Don

Thanks.

In your example of multi-line statements, is it required to have a space after the DO to prevent the compiler from interpreting it as a label. I assume that if this is the case, it would then complain about using a reserved word as a label.

Jon Williams

No, the space (recommended) is a matter of my style. Since the colon can be used as a legal separater, the compiler will not complain if you don't use the spaces that I choose to put in my code.

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Jon Williams
Applications Engineer, Parallax
Dallas Office