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Re: [gforth] FOR...NEXT
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From: |
Anton Ertl |
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Subject: |
Re: [gforth] FOR...NEXT |
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Date: |
Sat, 23 Feb 2019 19:02:08 +0100 |
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User-agent: |
NeoMutt/20170113 (1.7.2) |
On Sat, Feb 23, 2019 at 03:38:45PM +0000, dch wrote:
> Why does FOR run n+1 times? It seems inane. `4 FOR ... NEXT` should not
> run 5 times, that's absolutely ridiculous. Even Chuck's FOR loops ran n
> times in Forth and n times in ColorForth. So there must be a good reason
> for this.
Different Forths behave differently for FOR...NEXT:
gforth: n+1 iterations
iforth: n+1 iterations
bigforth: n+1 iterations
SwiftForth: for ?
VFX: for ?
lxf: n iterations
Because of that, I think that SwiftForth and VFX have the best
behaviour. However, I guess that Gforth has inherited its FOR..NEXT
behaviour from bigForth.
- anton