Re: FP number syntax

On 1/01/2025 4:17 pm, dxf wrote:

On 1/01/2025 2:42 pm, Bernd Linsel wrote:

On 01.01.25 01:45, dxf wrote:
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To support DPL I have >NUMBER increment it for every digit successfully
converted.  While most systems today have DPL (?) usage is probably too
diverse to standardize.
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It's documented in F83 Annex B (Uncontrolled Reference Words):

 
Those being mostly words from Kitt Peak Forth.
 

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      DPL          -- addr                       U              "d-p-l"
           A variable containing the number of places after the
           fractional point for input conversion.
>
It's usually implemented that DPL is reset to -1 when entering >NUMBER,
each successful digit conversion increments it only if it is >= 0, and the first decimal separator encountered changes it from -1 to 0.

 
Yes, in Fig-Forth.  In Swiftforth DPL is just a flag.  Now you've got me
wondering why Fig does the 'test before increment' and I left it out ...

Ok, the reason I left out the pre-increment test was likely generality.
In DX-Forth the DPL increment feature is ignored.  Since my doubles are
strictly ANS, DPL can only be -1 or 0.