Hello,
I was a little confused regarding scopes of packages. I did read
portions of
Programming Perl but am still a little unclear.
Basically, I am trying to implement a simple form of RPC in which
a command takes in a function name and passes it across to a daemon. The
daemon
using symbolic referencing invokes the function.
the daemon sources in 3 libraries (use A; use B; use C;)
Let's say A contains functions - foo, bar
and B contains functions - foofoo, barbar
C contains functions - morefoo, morebar
The daemon's top few lines look like
----------
package daemon;
use strict;
use A;
use B;
use C;
A.pm's top few lines look like
----------
package A;
use strict;
use vars qw(@ISA @EXPORT);
@ISA = qw (Exporter);
@EXPORT = qw (foo bar);
sub foo
{
print "foo called\n";
}
sub bar
{
print "bar called\n";
}
The questions I had were
1. To invoke a function (for e.g. foo) - what do i send across from the
client
command ? - daemon::foo ? A::foo ? or just foo ? - I guess my
question is
once you 'use' a package what happens to all the symbols from that
package.
Do they become part of the importing package ?
2. A followup question is that if B and/or C had the same name
subroutines
as A.pm did then what would happen.
thanks a lot,
tarak
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