Re: Creating and using arrays - again

Op Sun, 23 Mar 2008 12:13:19 -0000 schreef Andrew Haley:

> Jerry Avins <jya@[EMAIL PROTECTED]
> wrote:
>> Andrew Haley wrote:
>>> Jerry Avins <jya@[EMAIL PROTECTED]
> wrote:
>>>> Andrew Haley wrote:
>>>>> Jonah Thomas <jethomas5@[EMAIL PROTECTED]
> wrote:
>>> 
>>>>>> DOES> . There are a few Forths that don't give you DOES> and
someday you
>>>>>> DOES> might use one and need to work around it.
>>>>> Wouldn't it be better to write for such a Forth?
>>>>>
>>>>> DOES> has been in Forth for a very long time.  A Forth without DOES>
>>>>> is -- IMO -- fit only for the round filing cabinet in the corner.
>>> 
>>>> Recall that before CREATE DOES> there was <BUILDS DOES> .
>>> 
>>> OK.  I don't see your point.
> 
>> Only that the DOES> , one way or another, predates the one that goes 
>> with CREATE . I was amplifying "been in Forth for a very long time."
> 
> Oh, I see.  Here's what I remember:
> 
> First, there was CREATE ... ;CODE ; this sufficed for a few years
> until <BUILDS DOES> was added to do the ;CODE part in high-level
> Forth.  Later, CREATE DOES> was invented to remove the need for the
> special BUILDS> part and the additional pointer this requires.
> 
> CREATE DOES> was in FORTH-79 but not in fig-FORTH, which was also
> written in 1979 but kept the older <BUILDS DOES> .  This is strange,
> but I guess fig-FORTH just missed it.  Apart from in fig-FORTH, I
> don't think that <BUILDS DOES> was around for very long.  I guess
> fig-FORTH's great popularity is the only reason that anyone remembers
> <BUILDS DOES> .
> 
I always thought that fig-Forth began around 1977 or 1978, so a few years
before the 79-Standard (a long time in the history of Forth ;-)
I don't know about <BUILDS but I can imagine it being somewhat older.

I did have a Belgian Forth that used
: CONST , ;: @[EMAIL PROTECTED]
 ;
It didn't have DOES>    Sadly it didn't run on my 1802.
I remember seeing code from Chuck in the August Byte 1980 or somewhere
else
that had the same construct.
Later I implemented it, but CREATE DOES> was a lot simpler.

-- 
Coos

CHForth, 16 bit DOS applications
http://home.hccnet.nl/j.j.haak/forth.html