A refreshed synopsis

[perl/modules/Variable-Magic.git] / samples / synopsis.pl

diff --git a/samples/synopsis.pl b/samples/synopsis.pl
new file mode 100644 (file)
index 0000000..c2576be
--- /dev/null
+++ b/samples/synopsis.pl
@@ -0,0 +1,28 @@
+#!perl
+
+use strict;
+use warnings;
+
+use Variable::Magic qw/wizard cast VMG_OP_INFO_NAME/;
+
+{
+ my $wiz = wizard set  => sub { print "now set to ${$_[0]}!\n" },
+                  free => sub { print "destroyed!\n" };
+
+ my $a = 1;
+ cast $a, $wiz;
+ $a = 2;        # "now set to 2!"
+}               # "destroyed!"
+
+{
+ my $wiz = wizard data     => sub { $_[1] },
+                  fetch    => sub { $_[2] = $_[1] unless exists $_[0]->{$_[2]}; () },
+                  store    => sub { print "key $_[2] stored in $_[-1]\n" },
+                  copy_key => 1,
+                  op_info  => VMG_OP_INFO_NAME;
+     
+ my %h = (_default => 0, apple => 2);
+ cast %h, $wiz, '_default';
+ print $h{banana}, "\n"; # "0", because the 'banana' key doesn't exist in %h
+ $h{pear} = 1;           # "key pear stored in helem"
+}