[texhax] How to write a TeX code into file literally

[Heiko Oberdiek]

On Sun, Oct 09, 2011 at 08:43:17PM +0800, Yue Wu wrote:

> Thanks, it solves most part of the problem, but stil has a few left, plz see
> them below the context.

> >   \immediate\write\myout{#1\noexpand\endgraf#2}%

The \noexpand is on purpose. It prevents the expansion and
adds a space after the command token.

>   \immediate\write\testout{{\bf#1}\endgraf#2}

\immediate\write\testout{{\noexpand\bf#1}\noexpand\endgraf#2}

\noexpand is not needed before unexpandable command tokens
(plain defines \let\endgraf\par). Thus it is just defensive
programming in case \endgraf is redefined as macro.

Yours sincerely
  Heiko Oberdiek