From octave-sources-request at bevo dot che dot wisc dot edu Tue Apr 23 13:08:40 2002
Subject: Re: Optimization : bfgs and cg_min
From: Etienne Grossmann <etienne at damiao dot isr dot ist dot utl dot pt>
To: octave-sources at bevo dot che dot wisc dot edu
CC: etienne at isr dot ist dot utl dot pt
Date: Tue, 23 Apr 2002 19:10:56 +0100


<only Paul>
  Hi Paul

<only Ben>
  Hi Ben

<only sf>
  Hi Octave-Smiths

</only>
  I've worked a little bit on "some sort of a preprocessor" that
allows to maintain many .m files with a single template. The idea is
that many functions with different synopsis and nearly the same
internals would be easier to maintain :

>From pkienzle at jazz dot ncnr dot nist dot gov Fri Apr 19 19:36:53 2002

# Maybe we could have three separate internal routines, one for each case?
# If you want to go that route, I suggest keeping a single source file with
# some sort of preprocessor markup and use make to generate the actual
# functions that get installed.  I don't think we can use the C preprocessor
# because it needs to understand identifiers and strings, so we would have to
# invent our own.  I know people have done matlab preprocessors in the past
# (me included) but I can't find any links at the moment.

  The preprocessor, called 'fsplit' (you suggest a better name if you
like) is really simple. If you put this mail run in a file foo.tpl and
and do

  fsplit foo.tpl

it will produce files 'foo_Paul.txt', 'foo_Ben.txt' and
'foo_sf.txt'. When it finds a tag

<only sf>

All that follows (until the next <only> or </only> tag) goes into the 
file foo_sf.txt.

<only Ben, Paul>

Now, this will go to 'foo_Paul.txt' and 'foo_Ben.txt'.

</only>

And this will go to all files.

The name of the input file is trimmed by removing the old suffix,
which is indicated by 

<oldsuffix tpl>

The suffix of the new files is indicated by the <newsuffix> tag, like

<newsuffix txt>

Now, of course, for .m files, one will want <newsuffix m>. Note that
tags that are not at the beginning of the line are ignored, so that
I can write <newsuffix whatever_I_like>, the suffix is still .txt.

  And that's it.

  Does this sound like useful stuff?

  Etienne

-- 
Etienne Grossmann ------ http://www.isr.ist.utl.pt/~etienne