On Tue, 24 Sep 2002, Stefan Svensson wrote:
> I would like to simplify this with a macro that iterates over a string
> with all notes in the scale ({cd_efg'_ab}) and adds the corresponding
> numbers below, perhaps from a string like {12{\flt3}45{\flt6}{\flt7}}.
This looks like beeing a job for \futurelet: \futurelet\a\b<...> sets \a
to the first token of <...> and executes then \b. You may set up a loop
using this control sequence by iteration:
1 append an end character to the string
2 read the first character into a macro
3 if it is not the end character
- process it
- set a temporary macro to the operations 2-4
else
- drop the end character
- set the temporary macro to a void action
4 put the temporary macro
this should look like follows (not tested)
\def\processtoken#1{whatever you want to do with the single tokens}
\def\setend#1{#1-}% sets an endmark (`-`) behind the string
\def\check{% checks one token
\if\temp-\let\next\relax
\else\processtoken\temp\let\next\iterate
\fi
\next
}
\def\iterate{\futurelet\temp\check}
\def\processstring#1{\expandafter\iterate\setend{#1}}
happy hacking
Bernhard
_______________________________________________
TeX-music mailing list
[EMAIL PROTECTED]
http://sunsite.dk/mailman/listinfo/tex-music
