Constructors

The "new" constructor from Type::Tiny still works, of course. But there is also:

"new_union( type_constraints => \@enums, %opts )"

Creates a new enum type constraint which is the union of existing enum type constraints.

"new_intersection( type_constraints => \@enums, %opts )"

Creates a new enum type constraint which is the intersection of existing enum type constraints.

Attributes

"values"

Arrayref of allowable value strings. Non-string values (e.g. objects with overloading) will be stringified in the constructor.

"constraint"

Unlike Type::Tiny, you cannot pass a constraint coderef to the constructor. Instead rely on the default.

"inlined"

Unlike Type::Tiny, you cannot pass an inlining coderef to the constructor. Instead rely on the default.

"parent"

Parent is always Types::Standard::Str, and cannot be passed to the constructor.

"unique_values"

The list of "values" but sorted and with duplicates removed. This cannot be passed to the constructor.

"coercion"

If "coercion => 1" is passed to the constructor, the type will have a coercion using the "closest_match" method.

Methods

"as_regexp"

Returns the enum as a regexp which strings can be checked against. If you're checking a lot of strings, then using this regexp might be faster than checking each string against

my $enum  = Type::Tiny::Enum->new(...);
my $check = $enum->compiled_check;
my $re    = $enum->as_regexp;

# fast
my @valid_tokens = grep $enum->check($_), @all_tokens;

# faster
my @valid_tokens = grep $check->($_), @all_tokens;

# fastest
my @valid_tokens = grep /$re/, @all_tokens;

You can get a case-insensitive regexp using "$enum->as_regexp('i')".

"closest_match"

Returns the closest match in the enum for a string.

my $enum = Type::Tiny::Enum->new(
  values => [ qw( foo bar baz quux ) ],
);

say $enum->closest_match("FO");   # ==> foo

It will try to find an exact match first, fall back to a case-insensitive match, if it still can't find one, will try to find a head substring match, and finally, if given an integer, will use that as an index.

my $enum = Type::Tiny::Enum->new(
  values => [ qw( foo bar baz quux ) ],
);

say $enum->closest_match(  0 );  # ==> foo
say $enum->closest_match(  1 );  # ==> bar
say $enum->closest_match(  2 );  # ==> baz
say $enum->closest_match( -1 );  # ==> quux

"is_word_safe"

Returns true if none of the values in the enumeration contain a non-word character. Word characters include letters, numbers, and underscores, but not most punctuation or whitespace.

Exports

Type::Tiny::Enum can be used as an exporter.

use Type::Tiny::Enum Status => [ 'dead', 'alive' ];

This will export the following functions into your namespace:

"Status"

is_Status( $value )

assert_Status( $value )

to_Status( $value )

"STATUS_DEAD"

"STATUS_ALIVE"

Multiple enumerations can be exported at once:

use Type::Tiny::Enum (
  Status    => [ 'dead', 'alive' ],
  TaxStatus => [ 'paid', 'pending' ],
);

Overloading

•

Arrayrefification calls "values".