🚀 go-pugleaf

>>>>> On 27 Oct 92 12:25:10 GMT, schrod@iti.informatik.th-darmstadt.de
Joachim> In article <ORLOFF.92Oct26182957@surya4.cern.ch>, orloff@surya4.cern.ch (Jean Orloff) writes:
> 
> I want to define \newinput XXX having the following functionalities:
> - (normal)\input XXX
> - \def\lastinputname{XXX}

Joachim> This is impossible if you want the same behaviour for
Joachim> '\newinput XXX' and '\input XXX'.

Precisely, this is the problem!

Joachim> XXX is system dependent, ie, on different systems different
Joachim> characters might stop the scan of a file name. Therefore you

Are you sure? I know that the scanning stops on spaces even on systems
(eg Mac's) allowing white spaces in filenames and even on the ones
REQUIRING a white space before the extension (eg IBM VM/CMS which
remaps \input abc.tex into abc tex a0)... It surely stops on
unexpandable tokens everywhere.

Joachim> also easy. Look for the definition of \input in latex.tex (I
Joachim> assume that you know that LaTeX's \input isn't the primitive
Joachim> of TeX82.)

Of course I know it, this is the origin of my trouble!

Let me rephrase the heart of my problem: suppose I have a control
sequence \text containg a_11, b_11, {_1, c_11, }_2. How would I change
the catcodes of the inner braces???

Or even more simply: suppose I \let\nxtchar=X_y (char X with catcode
y). How can I change it's catcode to other (12)???

\begingroup
\catcode\expandafter'\nxtchar=12 \nxtchar
\endgroup

fails miserably... (as it should!)

TeXly your's
Jean
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