Thanks.  I must have had something else in there that was throwing it off.
It works fine now.

Thanks again,

Jim Fowler
EDS@Weyerhaeuser Business Process Automation Group
jim.fowler@[...].com
253-924-2356

-----Original Message-----
From: Jan Dubois [mailto:jand@[...].com] 
Sent: Thursday, March 04, 2004 12:10 PM
To: Fowler, Jim (EDS)
Cc: perl.net@listserv.ActiveState.com;
visualperl-discuss@[...].com
Subject: Re: How to return a Boolean from Perl to C#

On Thu, 4 Mar 2004 09:38:39 -0800 , "Fowler, Jim (EDS)"
<jim.fowler@[...].com>  wrote:

> How do I return true or false to C# from PERL.  If I define the method as
> returning a bool it will not accept a 1 or 0 as true or false, it wants the
> actual .Net Boolean type.  How do I do that?

You must be doing something wrong.  PerlNET automatically translates the
Perl bool semantics to .NET System.Boolean types whenever you declare
the return type as boolean.  For example:

# ===== MyBool.pl =====
package MyBool;

=for interface
    bool returns_true();
    bool returns_false();
=cut

sub returns_true  { 1 }
sub returns_false { 0 }

// ===== test.cs =====
class Test {
    static void Main() {
        MyBool obj = new MyBool();
        if (obj.returns_true())
            System.Console.WriteLine("returns true");
        if (!obj.returns_false())
            System.Console.WriteLine("returns false");
    }
}

Compiling and running it:

  plc --target library MyBool.pl
  csc test.cs -r:MyBool.dll
  test

prints:

  returns true
  returns false

If the Perl value is undef, 0 or "" then it will be converted to false,
otherwise it will become true.

Cheers,
-Jan
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