Double number conversion is indeed used while compiling. Without it you
could not enter double literals.

: FOO ( d1 -- d2) 100. D+ ;

> -----Original Message-----
> From: swiftx-bounce_at_forth.com [mailto:swiftx-bounce_at_forth.com]On Behalf
> Of David Graham
> Sent: Friday, June 01, 2001 12:17 PM
> To: swiftx_at_forth.com
> Subject: [swiftx] Re: Why is 4+ legal?
>
>
>
> Kevin and Elizabeth,
> Thanks for the feedback. I did find the explanation in the SwiftX
> documentation. It is neat to know that a double value
> -101 can be entered as -1..:-0-:..1-. I can write some really
> cryptic code
> with that <g>.
>
> My problem was not being aware that there were double number flags, i.e.
> punctuation. I graduated to SwiftX from Vesta and New Micro
> Forth that had
> dedicated words for the conversion, such as S>D. That works fine with
> source code, but I can see that the SwiftX method would be convenient
> dealing with user input. I had expected 4+ would have generated an error
> message alerting me to the typo, and was curious why SwiftX did not
> complain. It would help me avoid my typos if SwiftX disabled the double
> number flags while compiling, where they are not really needed, and only
> used them when interpreting user input, but I can live with how it is now
> that I understand what is going on.
>
> David Graham
>
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Received on Fri Jun 01 2001 - 12:23:52 PDT