Of course. But without that \enabledirective I can redefine the frozen macro at
will, as a simple test did show.
The crux, however, is that one wants to protect the frozen code always,
irrespective of that directive setting.
dr. Hans van der Meer
> On 12 Jun 2023, at 19:47, Hans Hagen via ntg-context <ntg-context@ntg.nl>
> wrote:
>
> On 6/12/2023 12:32 PM, Hans van der Meer via ntg-context wrote:
>>> 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?
> It's okay and has been around for quite a while now.
>
> \enabledirectives[overloadmode=error]
>
> \starttext
>
> \frozen\def\HOME{!!!!}
>
> \def\HOME{!!!!!}
>
> \stoptext
>
>
> -----------------------------------------------------------------
> Hans Hagen | PRAGMA ADE
> Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
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> -----------------------------------------------------------------
>
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