#'s in MPinclusions

#'s in MPinclusions

[Emil Hedevang Lohse]

The following code results in an error.

  \startMPinclusions
  vardef a@#(text t) = @#(t) enddef;
  \stopMPinclusions

  \starttext
  Hello.
  \stoptext

! Illegal parameter number in definition of \theMPinclusions.
<to be read again> 
                   (
<argument> vardef a@##(
                       text t) = @##(t) enddef; 
\startMPinclusions ...tions ;}}\writeMPgraphic {#1
                                                  }}
l.3 \stopMPinclusions
                     

I know that # is a special character in TeX, but is there a way to get
abound this? What I actually trying to do, is to make a diagram
drawing package that I wrote for Metapost, work in ConTeXt. So I would
like to include the Metapost macros once and then use them later in
drawings, that is,

  <include the Metapost macros in one way or another>

  \starttext

  ... we now have the following commutative diagram.  
  \startuseMPgraphic
    <my code for the diagram>
  \stopuseMPgraphic
  \useMPgraphic

  \stoptext



-- 
Emil Hedevang Lohse <http://home.imf.au.dk/emil/> 

Alle spørgsmål er lige dumme. 
Og spørgsmålet "Kan ænder flyve?" er ikke dumt.

Re: #'s in MPinclusions

[Patrick Gundlach]

Emil Hedevang Lohse <emil@imf.au.dk> writes:

Hello,

> I know that # is a special character in TeX, but is there a way to get
> abound this? 

I see two posibilites (both untested):

either replace the # with \# or surround your 

\startuseMPgraphic
\stopuseMPgraphic

with

{\catcode`#=11
\startuseMPgraphic
\stopuseMPgraphic
}

I don't know if this has any side effects in the startuseMPgraphic
environment or if this even works. Probably there is an official
ConTeXt way to do this.



Patrick
-- 
Mehr Buchstaben - mehr Spass

Re: Re: #'s in MPinclusions

[Hans Hagen]

At 12:54 PM 1/22/2003 +0100, Patrick Gundlach wrote:
>Emil Hedevang Lohse <emil@imf.au.dk> writes:
>
>Hello,
>
> > I know that # is a special character in TeX, but is there a way to get
> > abound this?
>
>I see two posibilites (both untested):
>
>either replace the # with \# or surround your
>
>\startuseMPgraphic
>\stopuseMPgraphic
>
>with
>
>{\catcode`#=11
>\startuseMPgraphic
>\stopuseMPgraphic
>}
>
>I don't know if this has any side effects in the startuseMPgraphic
>environment or if this even works. Probably there is an official
>ConTeXt way to do this.

Your first method is the proper way:

copied from supp-mps.tex:

\appendtoks
   \let \# \letterhash
   \let \_ \letterunderscore
   \let \& \letterampersand
   \let \{ \letteropenbrace
   \let \} \letterclosebrace
\to \everyMPgraphic

so, all these can be escaped

Hans
-------------------------------------------------------------------------
                                   Hans Hagen | PRAGMA ADE | pragma@wxs.nl
                       Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
  tel: +31 (0)38 477 53 69 | fax: +31 (0)38 477 53 74 | www.pragma-ade.com
-------------------------------------------------------------------------
                        information: http://www.pragma-ade.com/roadmap.pdf
                     documentation: http://www.pragma-ade.com/showcase.pdf
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Re: Re: #'s in MPinclusions

[Emil Hedevang Lohse]

Hans Hagen <pragma@wxs.nl> writes:

> Your first method is the proper way:
> 
> copied from supp-mps.tex:
> 
> \appendtoks
>    \let \# \letterhash
>    \let \_ \letterunderscore
>    \let \& \letterampersand
>    \let \{ \letteropenbrace
>    \let \} \letterclosebrace
> \to \everyMPgraphic

I believe there is a bug in supp-ini.tex:

  .catcode `.} 12 .xdef .letterclosebrace      B.string{E

should be

  .catcode `.} 12 .xdef .letterclosebrace      B.string}E


-- 
Emil Hedevang Lohse <http://home.imf.au.dk/emil/> 

Alle spørgsmål er lige dumme. 
Og spørgsmålet "Kan ænder flyve?" er ikke dumt.

Re: Re: #'s in MPinclusions

[Hans Hagen]

At 02:38 PM 1/24/2003 +0100, you wrote:

>I believe there is a bug in supp-ini.tex:
>
>   .catcode `.} 12 .xdef .letterclosebrace      B.string{E
>
>should be
>
>   .catcode `.} 12 .xdef .letterclosebrace      B.string}E

indeed

Hans
-------------------------------------------------------------------------
                                   Hans Hagen | PRAGMA ADE | pragma@wxs.nl
                       Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
  tel: +31 (0)38 477 53 69 | fax: +31 (0)38 477 53 74 | www.pragma-ade.com
-------------------------------------------------------------------------
                        information: http://www.pragma-ade.com/roadmap.pdf
                     documentation: http://www.pragma-ade.com/showcase.pdf
-------------------------------------------------------------------------