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From: Ruvim <ruvim.pinka@gmail.com>
Newsgroups: comp.lang.forth
Subject: Re: Toad using many vocabularies
Date: Fri, 1 Nov 2024 19:14:45 +0400
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On 2024-11-01 18:28, Ruvim wrote:
> On 2024-11-01 16:06, Stephen Pelc wrote:
>> On 31 Oct 2024 at 17:30:45 CET, "mhx" <mhx> wrote:
>>> It is also messy to write a definition that needs
>>> words from different vocabularies.
>>> ( Like a book with footnotes that span multiple pages,
>>> or where a chapter can not be read on its own. )
>>>
>>> How did you solve that complexity?
>>
>> Gerald Wodni implemented the VOC-DOT notation for VFX as a
>> recogniser. To reference a word in another vocabulary, just use
>>    <voc>.<word>
>> This notation has proven to be very useful, especially when dealing
>> with a range of byte-oriented serial devices, e.g:
>>    i2c.emit
>>    spi.emit
>>
>> The notation also reads well. I have no idea who invented it originally
>> and where the original source code is.
> 
> 
> Such a syntax is used in SP-Forth/4 since 2001, in the form 
> <voc>::<word> or <voc1>::<voc2>::<word>
> 
> Where <voc> is a word that returns wid, or a word that is created with 
> `vocabulary`.
> 
> This syntax in SP-Forth probably came after C++ "::" operator, 
> introduced in 1998.  The same operator was in C# from its initial 
> release in 2000.
> 
> The dot "." operator for accessing nested packages in Java was 
> introduced in 1995.
> 
> In Forth, a dot is often used as part of plain names, so it was less 
> suitable as a namespace separator.
> 


Another piece of history.

In Tcl, the sequence "::" for accessing namespaces was introduced in 
1997[1].

In Erlang, the sequence ":" (sic one colon) for accessing namespaces 
(which are essentially modules) was since its initial release in 1995.


[1] <http://tcl.tk/software/tcltk/8.0.html#incompatibilities>


--
Ruvim