Type::Tiny 2.8.0 Released

What’s new?

• The BoolLike type constraint accepts boolean.pm booleans.
• Type::Params offers some improvements for DWIM named parameter processing.
• More shortcuts are provided for exporting parameterized versions of type constraints.

Improvements to Type::Params

If your function or method takes named arguments, the list_to_named option allows these arguments to optionally be provided positionally as a shortcut:

  package My::Company;
  
  use v5.36;
  use Moo;
  use builtin qw( true false );
  use Types::Common qw( PositiveOrZeroNum InstanceOf );
  use Type::Params qw( signature_for );
  
  ...;
   
  signature_for pay_money => (
    method => true,
    named  => [
      amount    => PositiveOrZeroNum,
      employee  => InstanceOf['Local::Person'],
    ],
    list_to_named => true,
  );
  
  sub pay_money ( $self, $arg ) {
    $self->payroll_account->withdraw( $arg->amount );
    $arg->employee->bank_account->deposit( $arg->amount );
    return $self;
  }
  
  ...;
  
  my $co = My::Company->new( ... );
  
  # Standard usage is named arguments:
  $co->pay_money( amount => 3000, employee => $alice );
  $co->pay_money( { amount => 3000, employee => $bob } );
  
  # Or provide them as positional arguments in the same order
  # they were declared in (amount then employee):
  $co->pay_money( 3000, $carol );
  
  # Or if the types are unambiguous, switch it up and provide
  # them in the wrong order instead. Still works!
  $co->pay_money( $dave, 3000 );
  
  # Or mix and match:
  $co->pay_money( $eve, amount => 3000 );
  $co->pay_money( $eve, { amount => 3000 } );
  $co->pay_money( 3000, employee => $eve );
  $co->pay_money( 3000, { employee => $eve } );

Exporting Parameterized Types

For certain parameterizable types, there are now shortcuts to export parameterized versions of them.

For example, supposing you need to deal with numeric arrayrefs quite a lot. That is, arrayrefs containing only numbers. Previously, you’d probably do something like this:

  use Types::Common qw( Num ArrayRef );
  
  ...;
  
  has favourite_numbers => ( is => 'ro', isa => ArrayRef[Num] );
  
  ...;
  
  if ( ArrayRef->of( Num )->check( \@my_array ) ) {
    ...;
  }

Now you can easily create a Nums type constraint and use it:

  use Types::Common qw( Num );
  use Types::Standard::ArrayRef Nums => { of => Num };
  
  ...;
  
  has favourite_numbers => ( is => 'ro', isa => Nums );
  
  ...;
  
  if ( is_Nums \@my_array ) {
    ...;
  }

Not all parameterizable types support this, but many of the common ones do.