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=pod
=head1 PURPOSE
OK, we need to bite the bullet and lock down coercions on core type
constraints and parameterized type constraints.
=head1 SEE ALSO
L<RT 97516|https://rt.cpan.org/Public/Bug/Display.html?id=97516>.
=head1 AUTHOR
Toby Inkster E<lt>tobyink@cpan.orgE<gt>.
=head1 COPYRIGHT AND LICENCE
This software is copyright (c) 2014, 2017-2022 by Toby Inkster.
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
=cut
use strict;
use warnings;
use Test::More;
use Test::Fatal;
use Types::Standard -types;
use Types::Common::Numeric -types;
my $frozen = qr/\AAttempt to add coercion code to a Type::Coercion/;
like(
exception {
Str->coercion->add_type_coercions(ArrayRef, sub { "@$_" });
},
$frozen,
'Types::Standard core types are frozen',
);
like(
exception {
PositiveInt->coercion->add_type_coercions(NegativeInt, sub { -$_ });
},
$frozen,
'Types::Common types are frozen',
);
like(
exception {
InstanceOf->of("Foo")->coercion->add_type_coercions(HashRef, sub { bless $_, "Foo" });
},
$frozen,
'Parameterized types are frozen',
);
done_testing;
|
