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#!/usr/bin/env perl
use strict;
use warnings;
use Test::More 0.88;
use Devel::OverloadInfo qw(overload_info overload_op_info is_overloaded);
sub MyModule::negate { -$_[0] }
my $num_sub;
BEGIN { $num_sub = sub { 0 } };
{
package # hide from PAUSE
BaseClass;
use overload (
'""' => 'stringify',
bool => 'boolify',
'0+' => $num_sub,
);
sub boolify { 1 }
}
{
package # hide from PAUSE
ChildClass;
use parent -norequire => 'BaseClass';
use overload (
neg => \&MyModule::negate,
fallback => 1,
);
sub stringify { "foo" }
}
{
package # hide from PAUSE
EmptyOverload;
use overload;
}
{
package # hide from PAUSE
InheritedOnly;
use parent -norequire => 'BaseClass';
}
{
package # hide from PAUSE
NoOverload;
sub wibble {}
}
for my $class (qw(BaseClass ChildClass EmptyOverload InheritedOnly)) {
ok is_overloaded($class), "$class is overloaded";
}
for my $class (qw(NoOverload)) {
ok !is_overloaded($class), "$class is not overloaded";
}
is overload_op_info('BaseClass', 'cmp'), undef,
'overload_op_info() returns undef for non-overloaded op';
my $boi = overload_info('BaseClass');
# Whether undef fallback exists varies between perl versions
if (my $fallback = delete $boi->{fallback}) {
is_deeply $fallback, {
class => 'BaseClass',
value => undef,
}, 'BaseClass fallback is undef';
is_deeply overload_op_info('BaseClass', 'fallback'),
$fallback,
"overload_op_info('BaseClass','fallback') matches overload_info()";
}
else {
is overload_op_info('BaseClass', 'fallback'), undef,
"overload_op_info('BaseClass','fallback') matches overload_info()";
}
is_deeply $boi,
{
'""' => {
class => 'BaseClass',
method_name => 'stringify',
},
bool => {
class => 'BaseClass',
method_name => 'boolify',
code_class => 'BaseClass',
code => \&BaseClass::boolify,
code_name => "BaseClass::boolify",
},
'0+' => {
class => 'BaseClass',
code => $num_sub,
code_name => 'main::__ANON__',
},
},
"BaseClass overload info" or note explain $boi;
my $coi = overload_info('ChildClass');
is_deeply $coi,
{
fallback => {
class => 'ChildClass',
value => 1,
},
'""' => {
class => 'BaseClass',
method_name => 'stringify',
code_class => 'ChildClass',
code => \&ChildClass::stringify,
code_name => 'ChildClass::stringify',
},
bool => {
class => 'BaseClass',
method_name => 'boolify',
code_class => 'BaseClass',
code => \&BaseClass::boolify,
code_name => "BaseClass::boolify",
},
'0+' => {
class => 'BaseClass',
code => $num_sub,
code_name => 'main::__ANON__',
},
neg => {
class => 'ChildClass',
code => \&MyModule::negate,
code_name => 'MyModule::negate',
},
},
"ChildClass overload info" or note explain $coi;
for my $op (sort keys %$coi) {
is_deeply overload_op_info('ChildClass', $op),
$coi->{$op},
"overload_op_info('ChildClass', $op)";
}
is_deeply overload_info('InheritedOnly'),
overload_info('BaseClass'),
'InheritedOnly has same overloads as BaseClass';
is overload_op_info('NoOverload', 'fallback'), undef,
'overload_op_info on non-overloaded class';
is_deeply overload_info('NoOverload'), {},
'NoOverload has no overloads';
my $eoi = overload_info('EmptyOverload');
# Whether undef fallback exists varies between perl versions
if (my $fallback = delete $eoi->{fallback}) {
is_deeply $fallback, {
class => 'EmptyOverload',
value => undef,
}, 'EmptyOverload fallback is undef';
}
is_deeply $eoi, {},
'EmptyOverload has no overloads';
done_testing;
|
