[texhax] the \let command

Uwe Lück uwe.lueck at web.de
Wed Nov 29 02:56:14 CET 2006

... and here, \let me invite you to \relax with a few tricks that work indeed.
I hope that I can help you another time, before my boss strikes off my head.

At 14:01 27.11.06, R.Tange at soton.ac.uk wrote:

>\noindent\t bb\\
>\tie bb\\
>\c b\\
>\mycedilla b\\
>As you can see \tie does not produce the tie under the b's, so it does not
>point to the original definition of \t (once again: I would like something
>that points to the original def of \t and keeps doing so when I redefine

First solution (change \meaning locally in a group):

     \c b  {\renewcommand{\c}{\textit{c}}\c b}  \c b

     \t bb {\renewcommand{\t}{\textit{t}}\t bb} \t bb

Next: first, version b (advanced: more LaTeX-like):

   \newenvironment{c t changed}

   \c b \t bb
   \begin{c t changed}
    \c b \t bb
   \end{c t changed}
   \c b \t bb

-- I won't be surprised if you find these previous solutions
little useful for the applications you have in mind ...
so \let me try again -- the other way round, switch
to the original definitions locally:

\newcommand{\cedindeed} [1]{{\let\c\ced \c#1}}
\newcommand{\tiedindeed}[1]{{\let\t\tie \t#1}}
%% <- You see that \c and \t must get back their original meanings.
%%    It doesn't suffice to call them by names storing their meanings.


\c bb \cedindeed {bb} \c bb
\t bb \tiedindeed{bb} \t bb


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