[NTG-context] Re: Re: Re: nath catcode issues

Nikolai Weibull context-list at pcppopper.org
Sun Aug 8 21:28:45 CEST 2004


* Giuseppe Bilotta <gip.bilotta at iol.it> [Aug 08, 2004 16:30]:
> ConTeXt  ver: 2004.6.30  fmt: 2004.7.27  int: english  mes: english

Me too.

> [Example]

Argh, that doesn't happen here...

> This is pdfeTeX, Version 3.141592-1.20a-rc4-2.1 (MiKTeX 2.4)

pdfeTeX (Web2C 7.4.5) 3.14159-1.10b-2.1

I run latest tetex.

> > > It works like that? Excellent.

> > It seems I spoke too soon.  It does in fact not work.

> In the meantime, I'm thinking along the lines of something like

> \def\over{%
>  \ifmmode\n at err{Disabled command \string\over }
>   {No more a valid command. Replace {A \over B} with \frac A B.}%
>   \let\next\relax
>  \else\let\next\o at over\fi\next}
> \def\atop{%
>  \ifmmode\n at err{Disabled command \string\atop }
>   {No more a valid command. Use array instead.}%
>   \let\next\relax
>  \else\let\next\o at atop\fi\next}
> \def\choose{%
>  \ifmmode\n at err{Disabled command \string\choose }
>   {No more a valid command. Replace {A \choose B} with \binom A B.}%
>   \lext\next\relax
>  \else\let\next\o at choose\fi\next}

> which should be robust enough. Can you try it in the context
> where my previous solution busted?

I don't remember what busted, but it looks good.  It works for my
thesis, which is weird because you misspelled a \let (\lext) and it
still worked fine.

Furthermore, nested parentheses and stuff that produces implicit
parentheses don't scale correctly.  In fact, \left and \right don't seem
to work either:

\usemodule[nath]
\starttext
\[ (\frac{a}{b})^2 \]
versus
\[ \left(\frac{a}{b}\right)^2 \]
\stoptext

...,
	nikolai

--
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