Re: [Flashforth-devel] Free form number

[Mike M. <mi...@mo...>]

Forth typically converts a double number when there is ANY of the following punctuation chrs present anywhere in the number   , . / - :
The exception is a leading - chr which indictes a negative number. See Starting Forth, Leo Brodie.

These punctuations support European and US number and time formats, and many others. I see nothing wrong with adding the _ chr.

FF 4.8 only recognizes a . chr at the end of the digits, so I needed to write my own number conversion word.
A double number format closer to the standard would be nice.

  

Mike Miller
Moon Valley Circuits
mi...@mo...
http://www.moonvalleycircuits.com/


On 3/26/14 10:38 AM, Mikael Nordman wrote:

> I could easily extend the FF >number so that it
> would work as today but just ignore certain punctuation.
>
> What would be the best choice for punctuation ?
> Perhaps the comma character.
>
> Or use the period anywhere in number to indicate that it as double number.
> Not having any punctuation in  single numbers. This is how
> it is described in Forth Programmers Handbook.
>
> Single precision number
> #10,345
> %1011,1101,1111,0000
> $fad,e
>
> Double precision numbers
> %1011_1101_1111_0000.
> #10,345.
> $fade,babe.
> $f,a,d,e,b,a,b,e.
>
>
> You proposal with separate parsing words can be implemented as an add-on
> if wanted.
>
> BR Mike
>
>
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