1 use strict;
 2 use warnings;
 3 
 4 package MyTest;
 5 
 6 use base 'Exporter';
 7 our @EXPORT = qw/ tsvar tsvars /;
 8 
 9 # This is a proof of concept, in the real session object there is more.
10 my %VALUES;
11 
12 # Alias for a single variable
13 sub tsvar {
14     goto &tsvars;
15 }
16 
17
18
19 sub tsvars {
20     my %set;
21     while ( @_ ) {
22         my ( $var, $ident, $value ) = @_;
23         die( "Session variables must be scalars\n" ) if ref $var;
24         tie( $_[0], 'MyTest::Scalar', $ident );
25         if ( defined $value ) {
26             warn( "Warning: '$ident' session variable set multiple times in one call to tsvars\n" ) if $set{ $ident };
27             $VALUES{ $ident } = $value;
28             $set{ $ident } = 1;
29         }
30         shift( @_ ) for 0 .. 2;
31     }
32 }
33 
34 # Simple Tie::Scalar stuff.
35 # This directly accesses the %VALUES, in the real thing the session objects is
36 # passed in and stored in the scalar object.
37 {
38     package MyTest::Scalar;
39 
40     use strict;
41     use warnings;
42 
43     use Tie::Scalar;
44 
45     our @ISA = qw(Tie::Scalar);
46 
47     sub TIESCALAR {
48         my ( $class, $ident ) = @_;
49         $class = ref $class || $class;
50         return bless { ident => $ident }, $class;
51     }
52 
53     sub FETCH {
54         my $self = shift;
55         return $VALUES{ $self->ident };
56     }
57 
58     sub STORE {
59         my $self = shift;
60         $VALUES{ $self->ident } = shift if @_;
61     }
62 
63     sub ident {
64         my $self = shift;
65         return $self->{ ident };
66     }
67 }
68 
69 1;