On Wed, Jun 1, 2011 at 3:56 PM, Hans Hagen <pra...@wxs.nl> wrote:
> On 1-6-2011 3:46, luigi scarso wrote:
>>
>> On Wed, Jun 1, 2011 at 3:26 PM, Mojca Miklavec
>> <mojca.miklavec.li...@gmail.com> wrote:
>>>
>>> Dear magitians,
>>>
>>> I discovered this in LaTeX, but ConTeXt behaves the same (plain TeX
>>> behaves differently). Can somebody please explain me why this code
>>> fails to work? (A workaround is to move \newif on top which I'm
>>> willing to do, but I'm still curious.)
>>>
>>> \starttext
>>>
>>> \ifx\hbox\undefined
>>> \message{invisible to tex}
>>> \newif\ifabc \abcfalse
>>> \ifabc \message{abc true breaks} \else \message{abc false breaks} \fi
>>> \fi
>>>
>>> \stoptext
>>
>> (see wolfgang)
>> this works
>>
>> \newif\ifabc
>> \starttext
>>
>> \ifx\dhbox\undefined
>> \message{dhbox invisible to tex}
>> \abcfalse
>> \ifabc \message{abc true breaks} \else \message{abc false breaks} \fi
>> \fi
>>
>>
>> \ifx\hbox\undefined
>> \message{hbox invisible to tex}
>> \abcfalse
>> \ifabc \message{abc true breaks} \else \message{abc false breaks} \fi
>> \fi
>
> hm, you want to start an \ifx pissing contest ... ?
>
> \ifx\hbox\undefined
> \message{invisible to tex}
> \newif\ifabc \abcfalse
> \ifcsname ifabc\endcsname \message{abc true breaks} \else \message{abc
> false breaks} \fi
> \fi
no, --- infact I've said "this works", not "it's the only solution" or
" it's the perfect solution".
\ifcsname...
looks a bit strange if I'm working with \newif .
--
luigi
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