use PDL::AutoLoader; $a = func1(...); # Load file func1.pdl $b = func2(...); # Load file func2.pdl
$PDL::AutoLoader::Rescan = 1; # Enable re-scanning
Files are seached for using the directories in seach path @PDLLIB, which is initialised from the shell environment variable PDLLIB which is a colon seperated list of directories.
e.g. in csh
setenv PDLLIB ``/home/kgb/pdllib:/local/pdllib''
Note this is kept seperate from PERL5LIB just in case....
perldl
command line.
If $PDL::AutoLoader::Rescan == 1
and the file is changed then the new definition is reloaded auto-matically
before executing the perldl
command line. Which means in practice you can edit files, save changes and
have perldl
see the changes automatically.
The default is '0' - i.e. to have this feature disabled.
As this feature is only pertinent to the perldl
shell it imposes no overhead on PDL scripts. Yes Bob you can have your cake
and eat it too!
Note: files are only re-evaled if they are determined to have been changed according to their date/time stamp.
No doubt this interface could be improved upon some more. :-)
sub foo { # file 'foo.pdl' - define the 'foo' function my $x=shift; return sqrt($x**2 + $x**3 + 2); } 1; # File returns true (i.e. loaded successfully)
Copyright(C)
1997 Karl Glazebrook (kgb@aaoepp.aao.gov.au). All
rights reserved. There is no warranty. You are allowed to redistribute this
software / documentation under certain conditions. For details, see the
file COPYING in the PDL distribution. If this file is separated from the
PDL distribution, the copyright notice should be included in the file.
Will probably be quite slow if $PDL::AutoLoader::Rescan == 1
and thousands of functions have been autoloaded.
There could be a race condition in which the file changes while the internal autoloader code is being executed but it should be harmless.
Probably has not been tested enough!