mirror of https://github.com/texmacs/doc.git
80 lines
3.0 KiB
Tcl
80 lines
3.0 KiB
Tcl
<TeXmacs|1.0.3>
|
|
|
|
<style|tmdoc>
|
|
|
|
<\body>
|
|
<tmdoc-title|Macros and environment variables>
|
|
|
|
The main key-combinations that you should know to write style files are the
|
|
following:
|
|
|
|
<\description>
|
|
<item*|<key|inactive =>>creates a new assignment. The first argument is a new
|
|
command name and the second argument an expression.
|
|
|
|
<item*|<key|inactive w>>permits to locally change one or more environment
|
|
variables. With statements are of the form
|
|
<with|mode|math|\<langle\>x<rsub|1>\|a<rsub|1>\|\<cdots\>\|x<rsub|n>\|a<rsub|n>\|b\<rangle\>>,
|
|
where the <with|mode|math|x<rsub|i>> are the names of the variables, the
|
|
<with|mode|math|a<rsub|i>> their local values, and <with|mode|math|b> the
|
|
text on which the local environment applies.
|
|
|
|
<item*|<key|inactive m>>creates a macro. Arguments to the macro can be inserted
|
|
using the <key|tab>-key.
|
|
|
|
<item*|<key|inactive #>>get the value of a macro argument.
|
|
|
|
<item*|<key|inactive v>>get the value of an environment variable.
|
|
|
|
<item*|<key|inactive e>>expands the macro with zero or more arguments.
|
|
</description>
|
|
|
|
More precisely, when evaluating a macro expansion
|
|
<with|mode|math|{a\|x<rsub|1>\|\<cdots\>\|x<rsub|n>}> created by
|
|
<key|inactive e>, the following action is undertaken:
|
|
|
|
<\itemize>
|
|
<item>If <with|mode|math|a> is not a string nor a macro, then
|
|
<with|mode|math|a> is evaluated once. This results either in a macro name
|
|
or a macro expression <with|mode|math|f>.
|
|
|
|
<item>If we obtain a macro name, then we replace <with|mode|math|f> by
|
|
the value of the environment variable <with|mode|math|f>. If, after this,
|
|
<with|mode|math|f> is still not a macro expression, then we return
|
|
<with|mode|math|f>.
|
|
|
|
<item>Let <with|mode|math|y<rsub|1>,\<ldots\>,y<rsub|n>> be the arguments
|
|
of <with|mode|math|f> and <with|mode|math|b> it's body (superfluous
|
|
arguments are discarded; missing arguments take the empty string as their
|
|
default value). Then we substitute <with|mode|math|x<rsub|i>> for each
|
|
<with|mode|math|y<rsub|i>> in <with|mode|math|b> and return the evaluated
|
|
result.
|
|
</itemize>
|
|
|
|
<tmdoc-copyright|1998--2002|Joris van der Hoeven>
|
|
|
|
<tmdoc-license|Permission is granted to copy, distribute and/or modify this
|
|
document under the terms of the GNU Free Documentation License, Version 1.1
|
|
or any later version published by the Free Software Foundation; with no
|
|
Invariant Sections, with no Front-Cover Texts, and with no Back-Cover
|
|
Texts. A copy of the license is included in the section entitled "GNU Free
|
|
Documentation License".>
|
|
</body>
|
|
|
|
<\initial>
|
|
<\collection>
|
|
<associate|page-even|30mm>
|
|
<associate|page-reduce-bot|15mm>
|
|
<associate|page-reduce-right|25mm>
|
|
<associate|page-reduce-left|25mm>
|
|
<associate|sfactor|4>
|
|
<associate|page-top|30mm>
|
|
<associate|page-type|a4>
|
|
<associate|page-right|30mm>
|
|
<associate|par-width|150mm>
|
|
<associate|page-odd|30mm>
|
|
<associate|page-bot|30mm>
|
|
<associate|language|english>
|
|
<associate|page-reduce-top|15mm>
|
|
</collection>
|
|
</initial> |