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package MyClass;
$VERSION = '1.00';
use v5.6.0;
use base Attribute::Handlers;
no warnings 'redefine';
sub Good : ATTR(SCALAR) {
my ($package, $symbol, $referent, $attr, $data) = @_;
# Invoked for any scalar variable with a :Good attribute,
# provided the variable was declared in MyClass (or
# a derived class) or typed to MyClass.
# Do whatever to $referent here (executed in CHECK phase).
local $" = ", ";
print "MyClass::Good:ATTR(SCALAR)(@_);\n";
};
sub Bad : ATTR(SCALAR) {
# Invoked for any scalar variable with a :Bad attribute,
# provided the variable was declared in MyClass (or
# a derived class) or typed to MyClass.
local $" = ", ";
print "MyClass::Bad:ATTR(SCALAR)(@_);\n";
}
sub Good : ATTR(ARRAY) {
# Invoked for any array variable with a :Good attribute,
# provided the variable was declared in MyClass (or
# a derived class) or typed to MyClass.
local $" = ", ";
print "MyClass::Good:ATTR(ARRAY)(@_);\n";
};
sub Good : ATTR(HASH) {
# Invoked for any hash variable with a :Good attribute,
# provided the variable was declared in MyClass (or
# a derived class) or typed to MyClass.
local $" = ", ";
print "MyClass::Good:ATTR(HASH)(@_);\n";
};
sub Ugly : ATTR(CODE) {
# Invoked for any subroutine declared in MyClass (or a
# derived class) with an :Ugly attribute.
local $" = ", ";
print "MyClass::UGLY:ATTR(CODE)(@_);\n";
};
sub Omni : ATTR {
# Invoked for any scalar, array, hash, or subroutine
# with an :Omni attribute, provided the variable or
# subroutine was declared in MyClass (or a derived class)
# or the variable was typed to MyClass.
# Use ref($_[2]) to determine what kind of referent it was.
local $" = ", ";
my $type = ref $_[2];
print "MyClass::OMNI:ATTR($type)(@_);\n";
use Data::Dumper 'Dumper';
print Dumper [ \@_ ];
};
1;
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