From: Hans van der Meer via ntg-context <ntg-context@ntg.nl>
To: NTG ConTeXt <ntg-context@ntg.nl>
Cc: Hans van der Meer <havdmeer@ziggo.nl>
Subject: Re: [NTG-context] letfrozen?
Date: Mon, 12 Jun 2023 12:32:31 +0200 [thread overview]
Message-ID: <52D03A0F-C7EE-4AD3-8372-646CEDAD8AEE@ziggo.nl> (raw)
In-Reply-To: <09bf23d1-0e29-005b-ad2b-75bc836d299a@freedom.nl>
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> On 12 Jun 2023, at 11:12, Hans Hagen via ntg-context <ntg-context@ntg.nl> wrote:
>
> On 6/12/2023 10:57 AM, Hans van der Meer via ntg-context wrote:
>> The manual LMTX-primitives on page 21 tells me:
>> You can explicitly freeze an unfrozen macro.
>> ...
>> A redefinition will now give: You can't redefine a frozen macro.
>> But is this true? The following code seems to contradict this:
>> \def\HOME{myhome}
>> \writestatus{1}{\meaning\HOME}
>> \letfrozen\HOME
>> \writestatus{2}{\meaning\HOME}
>> \def\HOME{other home}
>> \writestatus{3}{\meaning\HOME}
>> 
>> Is this mechanism broken? It looks so useful to prevent accidental redefinition!
>
> here i run with
>
> \enabledirectives[overloadmode=error]
>
> (you can do that in cont-sys.mkxl)
>
> \enabledirectives[overloadmode=warning]
> Hans
>
Pity. Now I get on loading the tex file:
"csname overload > fatal error, protection level 4, control sequence 'nbsp', properties 'immutable', file 't-hvdm-text.tex', line 63
while I had hoped that frozen would give me something like:
illegal attempt to redefine \HOME
Byproduct (not unwanted) the above illegal redefinition to be solved :-)
May I ask why obviously the frozen-mechanism seems (yet?) unimplemented?
dr. Hans van der Meer
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next prev parent reply other threads:[~2023-06-12 10:33 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-12 8:57 Hans van der Meer via ntg-context
2023-06-12 9:12 ` Hans Hagen via ntg-context
2023-06-12 10:32 ` Hans van der Meer via ntg-context [this message]
2023-06-12 17:47 ` Hans Hagen via ntg-context
2023-06-13 10:43 ` Hans van der Meer via ntg-context
2023-06-13 17:23 ` Hans Hagen via ntg-context
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