typesetting underscore

typesetting underscore

[Gour]

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Hi!

Yesterday I played a bit with emacs' muse mode which has option to
'publish' to ConTeXt, but its output was wailing when texeexec-ing due
to use of \textunderscore (option in muse).

Today I discussed the issue on muse mailing list, got help and the
following remark: '...Context gurus don't seem to imagine you can use
"_" elsewhere than in math mode btw'.


I looked at ConTeXt docs (excursion and manual), as well as wiki on
contextgarden, but was not able to find more about what is the status
of underscore '_' char in ConTeXt and is the above remark true?

My usage of '_' in muse document was for preparing tables of some
library functions and, as it is often the case in software, there is
usually some prefix for all library functions as eg. gtk_xxxxx for GTK+
toolkit.


Sincerely,
Gour

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Re: typesetting underscore

[Aditya Mahajan]

On Sat, 12 Jan 2008, Gour wrote:

> Yesterday I played a bit with emacs' muse mode which has option to
> 'publish' to ConTeXt, but its output was wailing when texeexec-ing due
> to use of \textunderscore (option in muse).

Why does \textunderscore wail? \textunderscore should work fine.

> Today I discussed the issue on muse mailing list, got help and the
> following remark: '...Context gurus don't seem to imagine you can use
> "_" elsewhere than in math mode btw'.

:) This is how it is done in plain TeX, and both LaTeX and ConTeXt follow 
this. If you do not use maths at all, you can say

\catcode`\_ = 11

on the top of your file and then _ will be a letter in both text and math 
mode (which basically means that you will have to use \sb to get subscript 
in math mode.

It is possible to define something along the lines of underscore.sty in 
latex, so that _ is treated as a letter in text mode, and as a subscript 
indicator in math mode, but, read below.

> I looked at ConTeXt docs (excursion and manual), as well as wiki on
> contextgarden, but was not able to find more about what is the status
> of underscore '_' char in ConTeXt and is the above remark true?
>
> My usage of '_' in muse document was for preparing tables of some
> library functions and, as it is often the case in software, there is
> usually some prefix for all library functions as eg. gtk_xxxxx for GTK+
> toolkit.

Shouldn't such function names be written as \type{gtk_xxxx} when muse 
converts the document to ConTeXt? In that case the _ will be preserved.

Aditya
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Re: typesetting underscore

[Gour]

On Sat, 12 Jan 2008 12:59:39 -0500 (EST)
Aditya Mahajan <adityam@umich.edu> wrote:


> Why does \textunderscore wail? \textunderscore should work fine.

See https://mail.gna.org/public/muse-el-discuss/2008-01/msg00001.html
thread.

> :) This is how it is done in plain TeX, and both LaTeX and ConTeXt
> follow this. If you do not use maths at all, you can say
> 
> \catcode`\_ = 11
> 
> on the top of your file and then _ will be a letter in both text and
> math mode (which basically means that you will have to use \sb to get
> subscript in math mode.

Hmm, not ideal...

> It is possible to define something along the lines of underscore.sty
> in latex, so that _ is treated as a letter in text mode, and as a
> subscript indicator in math mode, but, read below.

I do not remember having ever problem with underscore in LaTeX.

> Shouldn't such function names be written as \type{gtk_xxxx} when muse 
> converts the document to ConTeXt? In that case the _ will be
> preserved.

Right. They will fix default in muse and use \type{_} as value for
underscore.

Thank you for your input.

Sincerely,
Gour
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Re: typesetting underscore

[Aditya Mahajan]

On Sat, 12 Jan 2008, Gour wrote:

> On Sat, 12 Jan 2008 12:59:39 -0500 (EST)
> Aditya Mahajan <adityam@umich.edu> wrote:
>
>
>> Why does \textunderscore wail? \textunderscore should work fine.
>
> See https://mail.gna.org/public/muse-el-discuss/2008-01/msg00001.html
> thread.

This is just a mistake of the parser. Either _ should be translated to 
"\textunderscore "(\textunderscore followed by a space) or more precisely 
by \textunderscore{} or \_ .

> I do not remember having ever problem with underscore in LaTeX.

Read the documentation of underscore.sty and you will know the trouble of 
using underscore in LaTeX (some of those are true for ConTeXt also).

>> Shouldn't such function names be written as \type{gtk_xxxx} when muse
>> converts the document to ConTeXt? In that case the _ will be
>> preserved.
>
> Right. They will fix default in muse and use \type{_} as value for
> underscore.

No, the default should either be \_ or \letterunderscore{} (with the 
brackets). \type{_} will be influenced by \setuptype (or \setuptyping) and 
can give colored output also.

Aditya
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Re: typesetting underscore

[Hans Hagen]

Aditya Mahajan wrote:

> :) This is how it is done in plain TeX, and both LaTeX and ConTeXt follow 
> this. If you do not use maths at all, you can say
> 
> \catcode`\_ = 11

or ...

\nonknuthmode

(there's also \donkunthmode -)

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Re: typesetting underscore

[Aditya Mahajan]

On Sun, 13 Jan 2008, Hans Hagen wrote:

> Aditya Mahajan wrote:
>
>> :) This is how it is done in plain TeX, and both LaTeX and ConTeXt follow
>> this. If you do not use maths at all, you can say
>>
>> \catcode`\_ = 11
>
> or ...
>
> \nonknuthmode
>
> (there's also \donkunthmode -)

Hey, somehow never noticed this one before.

Aditya
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Re: typesetting underscore

[Jean Magnan de Bornier]

Le 13 janvier à 23:47:12 Hans Hagen <pragma@wxs.nl> écrit notamment:

| Aditya Mahajan wrote:
>
| > :) This is how it is done in plain TeX, and both LaTeX and ConTeXt follow 
| > this. If you do not use maths at all, you can say
| > 
| > \catcode`\_ = 11
>
| or ...
>
| \nonknuthmode
>
| (there's also \donkunthmode -)
>

[...]

As far as I can see, \nonknuthmode_ or \nonknuthmode{_} produces a wider "_" than
\textunderscore{} does. 
-- 
Jean
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