changelog.yml

---
- version: 1.7.2
  date: 2024-01-05
  fixed:
  - "Fixed BigDecimal warning due to not being required in gemspec (@bkuhlmann in #464)"
- version: 1.7.1
  date: 2023-02-17
  fixed:
  - "Warning from jruby about overwritten keyword (@flash-gordon + @klobuczek in #454)"
- version: 1.7.0
  date: 2022-11-04
  changed:
  - "This version is compatible with recently released dry-rb dependencies (@flash-gordon)"
  - "Updated to dry-core 1.0 (@flash-gordon + @solnic)"
  - "Dependency on dry-container was dropped (@flash-gordon)"
- version: 1.6.1
  date: 2022-10-15
  changed:
  - "Fix issues with internal const_missing and Inflector/Module constants (@flash-gordon + @solnic)"
- version: 1.6.0
  date: 2022-10-15
  changed:
  - "Optimize `PredicateRegistry` for Ruby 2.7+ (see #420 for more details) (@casperisfine)"
  - "Use zeitwerk for auto-loading (@flash-gordon)"
- version: 1.5.1
  date: '2021-02-16'
  fixed:
  - |-
    Add missing requires for internal usage of `Dry::Equalizer` (@timriley in #418)
- version: 1.5.0
  date: '2021-01-21'
  added:
  - |-
    Wrapping constructor types :tada: (@flash-gordon)

      Constructor blocks can have a second argument.
      The second argument is the underlying type itself:
      ```ruby
      age_from_year = Dry::Types['coercible.integer'].constructor do |input, type|
        Date.today.year - type.(input)
      end
      age_from_year.('2000') # => 21
      ```
      With wrapping constructors you have control over "type application". You can even
      run it more than once:
      ```ruby
      inc = Dry::Types['integer'].constructor(&:succ)
      inc2x = inc.constructor { _2.(_2.(_2.(_1))) }
      inc2x.(10) # => 13
      ```
  - |-
    Fallbacks :tada: (@flash-gordon)

      ```ruby
      age = Dry::Types['coercible.ineger'].fallback(18)
      age.('10') # => 10
      age.('20') # => 20
      age.('abc') # => 18
      ```

      Fallbacks are different from default values: the later will be evaluated
      only when *no input* provided.

      Under the hood, `.fallback` creates a wrapping constructor.
  - '`params.string` as an alias for `strict.string`. This addition should be non-breaking (@flash-gordon)'
  - |-
    API for defining custom type builders similar to `.default`, `.constructor`, or `.optional` (@flash-gordon)

      ```ruby
      # Making an alias for `.fallback`
      Dry::Types.define_builder(:or) { |type, v| type.fallback(v) }

      # Using new builder
      type = Dry::Types['integer'].or(-273)
      type.(:invalid) # => -273
      ```
  changed:
  - |-
    Inferring predicates from class names is deprecated. It's very unlikely your code depends on it,
      however, if it does, you'll get an exception with instructions. (@flash-gordon)

      If you don't rely on inferring, just disable it with:

      ```ruby
      Dry::Types::PredicateInferrer::Compiler.infer_predicate_by_class_name false
      ```

      Otherwise, enable it explicitly:

      ```ruby
      Dry::Types::PredicateInferrer::Compiler.infer_predicate_by_class_name true
      ```

- version: 1.4.0
  date: '2020-03-09'
  fixed:
  - |-
    `json.nil` no longer coerces empty strings to `nil`. It was a long-standing
    bug that for some reason remained unnoticed for years. Technically,
    this may be a breaking change for JSON schemas described with dry-schema (@flash-gordon)
- version: 1.3.1
  date: '2020-02-17'
  changed:
    - "Predicate inferrer now returns `hash?` for hash schemas. Note, it doesn't spit
      more complex preds because we have different plans for dry-schema (@flash-gordon)"
- version: 1.3.0
  date: '2020-02-10'
  fixed:
  - "`Schema::Key#optional` returns an instance of `Schema::Key` as it should have
    done"
  - Composition with function handling exceptions. This could occasionally lead to
    unexpected exceptions (@flash-gordon)
  added:
  - "`Schema#merge` for merging two hash schemas (@waiting-for-dev)"
  - |-
    Aliases for `.constructor` to non-constructor types. Now you can call `.prepend`/`.append` without silly checks for the type being a constructor (flash-gordon)
      ```ruby
      (Dry::Types['integer'].prepend(-> { _1 + 1 })).(1) # => 2
      (Dry::Types['coercible.integer']  >> -> { _1 * 2 }).('99') # => 198
      ```
  - "`Hash::Schema#clear` returns a schema with the same options but without keys"
  - Optional namespace now includes strict types by default (@flash-gordon)
- version: 1.2.2
  date: '2019-12-14'
  fixed:
  - "`Types.Contructor` doesn't re-wrap class instances implementing type interface,
    this fixes some quirks in dry-struct (@flash-gordon)"
  changed:
  - Types now use immutable equalizers. This should improve performance in certain
    cases e.g. in ROM (flash-gordon)
  - Attempting to use non-symbol keys in hash schemas raises an error. We always supported
    only symbols as keys but there was no check, now it'll throw an argument error.
    If you want to convert strings to symbols, use `Hash#with_key_transform` (flash-gordon)
  - Params and JSON types accept Time/Date/Datetime instances and boolean values.
    This can be useful in tests but we discourage you from relying on this behavior
    in production code. For example, building structs with `Params` types is considered
    a smell. There are dedicated tools for coercion, namely dry-schema and dry-validation.
    Be responsible user of dry-types! ❤ (flash-gordon)
- version: 1.2.1
  date: '2019-11-07'
  fixed:
  - Fix keyword warnings reported by Ruby 2.7 (flash-gordon)
  - Error type in failing case in `Array::Member` (esparta)
- version: 1.2.0
  date: '2019-10-06'
  changed:
  - "`Dry::Types.[]` used to work with classes, now it's deprecated (flash-gordon)"
  fixed:
  - Bug with using a `Bool`-named struct as a schema key (flash-gordon)
  - A bunch of issues related to using `meta` on complex types (flash-gordon)
  - "`Types.Constructor(...)` returns a `Types::Array` as it should (flash-gordon)"
  added:
  - |-
    `Optional::Params` types that coerce empty strings to `nil` (flash-gordon)
      ```ruby
      Dry::Types['optional.params.integer'].('') # => nil
      Dry::Types['optional.params.integer'].('140') # => 140
      Dry::Types['optional.params.integer'].('asd') # => exception!
      ```
      Keep in mind, `Dry::Types['optional.params.integer']` and `Dry::Types['params.integer'].optional` are not the same, the latter doesn't handle empty strings.
  - |-
    Predicate inferrer was ported from dry-schema (authored by solnic)
      ```ruby
      require 'dry/types/predicate_inferrer'
      Dry::Types::PredicateInferrer.new[Types::String]
      # => [:str?]
      Dry::Types::PredicateInferrer.new[Types::String | Types::Integer]
      # => [[[:str?], [:int?]]]
      ```
      Note that the API of the predicate inferrer can change in the stable version, it's dictated by the needs of dry-schema so it should be considered as semi-stable. If you depend on it, write specs covering the desired behavior. Another option is copy-and-paste the whole thing to your project.
  - |-
    Primitive inferrer was ported from dry-schema (authored by solnic)
      ```ruby
      require 'dry/types/primitive_inferrer'
      Dry::Types::PrimitiveInferrer.new[Types::String]
      # => [String]
      Dry::Types::PrimitiveInferrer.new[Types::String | Types::Integer]
      # => [String, Integer]
      Dry::Types::PrimitiveInferrer.new[Types::String.optional]
      # => [NilClass, String]
      ```
      The primitive inferrer should be stable by now, you can rely on it.
  - |-
    The `monads` extension adds `Dry::Types::Result#to_monad`. This makes it compatible with do notation from dry-monads. Load it with `Dry::Types.load_extensions(:monads)` (skryukov)

      ```ruby
      Types = Dry.Types
      Dry::Types.load_extensions(:monads)

      class AddTen
        include Dry::Monads[:result, :do]

        def call(input)
          integer = yield Types::Coercible::Integer.try(input)

          Success(integer + 10)
        end
      end
      ```
- version: 1.1.1
  date: '2019-07-26'
  fixed:
  - A bug where meta was lost for lax array types (flash-gordon)
- version: 1.1.0
  date: '2019-07-02'
  added:
  - |-
    New builder method `Interface` constructs a type which accepts objects that respond to the given methods (waiting-for-dev)
      ```ruby
      Types = Dry.Types()
      Types::Callable = Types.Interface(:call)
      Types::Callable.valid?(Object.new) # => false
      Types::Callable.valid?(proc {})    # => true
      ```
  - 'New types: `coercible.symbol`, `params.symbol`, and `json.symbol`, all use `.to_sym`
    for coercion (waiting-for-dev)'
  fixed:
  - Converting schema keys to maybe types (flash-gordon)
  - Using `Schema#key` and `Array#member` on constuctors (flash-gordon)
  - 'Using `meta(omittable: true)` within `transform_types` works again but produces
    a warning, please migrate to `.omittable` or `.required(false)` (flash-gordon)'
  - Bug with a constructror defined on top of enum (flash-gordon)
- version: 1.0.1
  date: '2019-06-04'
  added:
  - |-
    In a case of failure the constructor block can now pass a different value (flash-gordon)
      ```ruby
      not_empty_string = Types::String.constructor do |value, &failure|
        value.strip.empty? ? failure.(nil) : value.strip
      end
      not_empty_string.('   ') { |v| v } # => nil
      not_empty_string.lax.('     ')     # => nil
      not_empty_string.lax.(' foo  ')    # => "foo"
      ```
  - "`Schema#strict` now accepts an boolean argument. If `fales` is passed this will
    turn a strict schema into a non-strict one (flash-gordon)"
- version: 1.0.0
  date: '2019-04-23'
  changed:
  - |-
    [BREAKING] Behavior of built-in constructor types was changed to be more strict. They will always raise an error on failed coercion (flash-gordon)
      Compare:

      ```ruby
      # 0.15.0
      Types::Params::Integer.('foo')
      # => "foo"

      # 1.0.0
      Types::Params::Integer.('foo')
      # => Dry::Types::CoercionError: invalid value for Integer(): "foo"
      ```

      To handle coercion errors `Type#call` now yields a block:

      ```ruby
      Types::Params::Integer.('foo') { :invalid } # => :invalid
      ```

      This makes work with coercions more straightforward and way faster.
  - "[BREAKING] Safe types were renamed to Lax, this name better serves their purpose.
    The previous name is available but prints a warning (flash-gordon)"
  - "[BREAKING] Metadata is now pushed down to the decorated type. It is not likely
    you will notice a difference but this a breaking change that enables some use
    cases in rom related to the usage of default types in relations (flash-gordon)"
  - Nominal types are now completely unconstrained. This fixes some inconsistencies
    when using them with constraints. `Nominal#try` will always return a successful
    result, for the previous behavior use `Nominal#try_coerce` or switch to strict
    types with passing a block to `#call` (flash-gordon)
  - "## Performance improvements"
  - During the work on this release, a lot of performance improvements were made.
    dry-types 1.0 combined with dry-logic 1.0 are multiple times faster than dry-types
    0.15 and dry-logic 0.5 for common cases including constraints checking and coercion
    (flash-gordon)
  added:
  - |-
    API for custom constructor types was enhanced. If you pass your own callable to `.constructor` it can have a block in its signature. If a block is passed, you must call it on failed coercion, otherwise raise a type coercion error (flash-gordon)
      Example:
      ```ruby
      proc do |input, &block|
        if input.is_a? String
          Integer(input, 10)
        else
          Integer(input)
        end
      rescue ArgumentError, TypeError => error
        if block
          block.call
        else
          raise Dry::Types::CoercionError.new(
            error.message,
            backtrace: error.backtrace
          )
        end
      end
      ```
      This makes the exception handling your job so that dry-types won't have to catch and re-wrap all possible errors (this is not safe, generally speaking).
  - |-
    Types now can be converted to procs thus you can pass them as blocks (flash-gordon)
      ```ruby
      %w(1 2 3).map(&Types::Coercible::Integer)
      # => [1, 2, 3]
      ```
- version: 0.15.0
  date: '2019-03-22'
  changed:
  - |-
    [BREAKING] Internal representation of hash schemas was changed to be a simple list of key types (flash-gordon)
      `Dry::Types::Hash#with_type_transform` now yields a key type instead of type + name:
      ```ruby
      Dry::Types['strict.hash'].with_type_transform { |key| key.name == :age ? key.required(false) : key }
      ```
  - "[BREAKING] Definition types were renamed to nominal (flash-gordon)"
  - |-
    [BREAKING] Top-level types returned by `Dry::Types.[]` are now strict (flash-gordon)
      ```ruby
      # before
      Dry::Types['integer']
      # => #<Dry::Types[Nominal<Integer>]>
      # now
      Dry::Types['integer']
      # => <Dry::Types[Constrained<Nominal<Integer> rule=[type?(Integer)]>]>
      # you can still access nominal types using namespace
      Dry::Types['nominal.integer']
      # => #<Dry::Types[Nominal<Integer>]>
      ```
  - "[BREAKING] Default values are not evaluated if the decorated type returns `nil`.
    They are triggered on `Undefined` instead (GustavoCaso + flash-gordon)"
  - "[BREAKING] Support for old hash schemas was fully removed. This makes dry-types
    not compatible with dry-validation < 1.0 (flash-gordon)"
  - |-
    `Dry::Types.module` is deprecated in favor of `Dry.Types` (flash-gordon)
      Keep in mind `Dry.Types` uses strict types for top-level names, that is after
      ```ruby
      module Types
        include Dry.Types
      end
      ```
      `Types::Integer` is a strict type. If you want it to be nominal, use `include Dry.Types(default: :nominal)`. See other options below.
  - "`params.integer` now always converts strings to decimal numbers, this means `09`
    will be coerced to `9` (threw an error before) (skryukov)"
  - Ruby 2.3 is EOL and not officially supported. It may work but we don't test it.
  added:
  - |-
    Improved string representation of types (flash-gordon)
      ```ruby
      Dry::Types['nominal.integer']
      # => #<Dry::Types[Nominal<Integer>]>
      Dry::Types['params.integer']
      # => #<Dry::Types[Constructor<Nominal<Integer> fn=Dry::Types::Coercions::Params.to_int>]>
      Dry::Types['hash'].schema(age?: 'integer')
      # => #<Dry::Types[Constrained<Schema<keys={age?: Constrained<Nominal<Integer> rule=[type?(Integer)]>}> rule=[type?(Hash)]>]>
      Dry::Types['array<integer>']
      # => #<Dry::Types[Constrained<Array<Constrained<Nominal<Integer> rule=[type?(Integer)]>> rule=[type?(Array)]>]>
      ```
  - |-
    Options for the list of types you want to import with `Dry.Types` (flash-gordon)
      Cherry-pick only certain types:
      ```ruby
      module Types
        include Dry.Types(:strict, :nominal, :coercible)
      end
      Types.constants
      # => [:Strict, :Nominal, :Coercible]
      ```
      Change default top-level types:
      ```ruby
      module Types
        include Dry.Types(default: :coercible)
      end
      # => #<Dry::Types[Constructor<Nominal<Integer> fn=Kernel.Integer>]>
      ```
      Rename type namespaces:
      ```ruby
      module Types
        include Dry.Types(strict: :Strong, coercible: :Kernel)
      end
      ```
  - |-
    Optional keys for schemas can be provided with ?-ending symbols (flash-gordon)
      ```ruby
      Dry::Types['hash'].schema(name: 'string', age?: 'integer')
      ```
  - |-
    Another way of making keys optional is setting `required: false` to meta. In fact, it is the preferable
      way if you have to store this information in `meta`, otherwise use the Key's API (see below) (flash-gordon)
      ```ruby
      Dry::Types['hash'].schema(
        name: Dry::Types['string'],
        age: Dry::Types['integer'].meta(required: false)
      )
      ```
  - |-
    Key types have API for making keys omittable and back (flash-gordon)

      ```ruby
      # defining a base schema with optional keys
      lax_hash = Dry::Types['hash'].with_type_transform { |key| key.required(false) }
      # same as
      lax_hash = Dry::Types['hash'].with_type_transform(&:omittable)

      # keys in user_schema are not required
      user_schema = lax_hash.schema(name: 'string', age: 'integer')
      ```
  - "`Type#optional?` now recognizes more cases where `nil` is an allowed value (flash-gordon)"
  - |-
    `Constructor#{prepend,append}` with `<<` and `>>` as aliases. `Constructor#append` works the same way `Constructor#constrcutor` does. `Constuctor#prepend` chains functions in the reverse order, see examples (flash-gordon)

      ```ruby
      to_int = Types::Coercible::Integer
      inc = to_int.append { |x| x + 2 }
      inc.("1") # => "1" -> 1 -> 3

      inc = to_int.prepend { |x| x + "2" }
      inc.("1") # => "1" -> "12" -> 12
      ```
  - |-
    Partial schema application for cases when you want to validate only a subset of keys (flash-gordon)
      This is useful when you want to update a key or two in an already-validated hash. A perfect example is `Dry::Struct#new` where this feature is now used.
      ```ruby
      schema = Dry::Types['hash'].schema(name: 'string', age: 'integer')
      value = schema.(name: 'John', age: 20)
      update = schema.apply({ age: 21 }, skip_missing: true)
      value.merge(update)
      ```
  fixed:
  - "`Hash::Map` now behaves as a constrained type if its values are constrained (flash-gordon)"
  - "`coercible.integer` now doesn't blow up on invalid strings (exterm)"
- version: 0.14.1
  date: '2019-03-25'
  fixed:
  - "`coercible.integer` now doesn't blow up on invalid strings (exterm)"
- version: 0.14.0
  date: '2019-01-29'
  changed:
  - "[BREAKING] Support for Ruby 2.2 was dropped. It reached EOL on March 31, 2018."
  - "`dry-logic` was updated to `~> 0.5` (solnic)"
  fixed:
  - "`valid?` works correctly with constructors now (cgeorgii)"
- version: 0.13.4
  date: '2018-12-21'
  fixed:
  - Fixed warnings about keyword arguments from Ruby 2.6. See https://bugs.ruby-lang.org/issues/14183
    for all the details (flash-gordon)
- version: 0.13.3
  date: '2018-11-25'
  fixed:
  - "`Dry::Types::Hash#try` returns `Failure` instead of throwing an exception on
    missing keys (GustavoCaso)"
- version: 0.13.2
  date: '2018-05-30'
  fixed:
  - "`Defaults#valid?` now works fine when passing `Dry::Core::Constans::Undefined`
    as value (GustavoCaso)"
  - "`valid?` for constructor types wrapping `Sum`s (GustavoCaso)"
- version: 0.13.1
  date: '2018-05-28'
  fixed:
  - Defaults now works fine with meta (GustavoCaso)
  - Defaults are now re-decorated properly (flash-gordon)
  added:
  - "`params.int` was added to make the upgrade process in dry-validation smoother
    (available after you `require 'dry/types/compat/int'`) (flash-gordon)"
- version: 0.13.0
  date: '2018-05-03'
  changed:
  - "[BREAKING] Renamed `Types::Form` to `Types::Params`. You can opt-in the former
    name with `require 'dry/types/compat/form_types'`. It will be dropped in the next
    release (ndrluis)"
  - "[BREAKING] The `Int` types was renamed to `Integer`, this was the only type named
    differently from the standard Ruby classes so it has been made consistent. The
    former name is available with `require 'dry/types/compat/int'` (GustavoCaso +
    flash-gordon)"
  - |-
    [BREAKING] Default types are not evaluated on `nil`. Default values are evaluated _only_ if no value were given.
      ```ruby
        type = Types::Strict::String.default("hello")
        type[nil] # => constraint error
        type[] # => "hello"
      ```
      This change allowed to greatly simplify hash schemas, make them a lot more flexible yet predictable (see below).
  - "[BREAKING] `Dry::Types.register_class` was removed, `Dry::Types.register` was
    made private API, do not register your types in the global `dry-types` container,
    use a module instead, e.g. `Types` (flash-gordon)"
  - "[BREAKING] Enum types don't accept value index anymore. Instead, explicit mapping
    is supported, see below (flash-gordon)"
  added:
  - |-
    Hash schemas were rewritten. The old API is still around but is going to be deprecated and removed before 1.0. The new API is simpler and more flexible. Instead of having a bunch of predefined schemas you can build your own by combining the following methods:

      1. `Schema#with_key_transform`—transforms keys of input hashes, for things like symbolizing etc.
      2. `Schema#strict`—makes a schema intolerant to unknown keys.
      3. `Hash#with_type_transform`—transforms member types with an arbitrary block. For instance,

      ```ruby
      optional_keys = Types::Hash.with_type_transform { |t, _key| t.optional }
      schema = optional_keys.schema(name: 'strict.string', age: 'strict.int')
      schema.(name: "Jane", age: nil) # => {name: "Jane", age: nil}
      ```

      Note that by default all keys are required, if a key is expected to be absent, add to the corresponding type's meta `omittable: true`:

      ```ruby
      intolerant = Types::Hash.schema(name: Types::Strict::String)
      intolerant[{}] # => Dry::Types::MissingKeyError
      tolerant = Types::Hash.schema(name: Types::Strict::String.meta(omittable: true))
      tolerant[{}] # => {}
      tolerant_with_default = Types::Hash.schema(name: Types::Strict::String.meta(omittable: true).default("John"))
      tolerant[{}] # => {name: "John"}
      ```

      The new API is composable in a natural way:

      ```ruby
      TOLERANT = Types::Hash.with_type_transform { |t| t.meta(omittable: true) }.freeze
      user = TOLERANT.schema(name: 'strict.string', age: 'strict.int')
      user.(name: "Jane") # => {name: "Jane"}

      TOLERANT_SYMBOLIZED = TOLERANT.with_key_transform(&:to_sym)
      user_sym = TOLERANT_SYMBOLIZED.schema(name: 'strict.string', age: 'strict.int')
      user_sym.("name" => "Jane") # => {name: "Jane"}
      ```

      (flash-gordon)
  - |-
    `Types.Strict` is an alias for `Types.Instance` (flash-gordon)
      ```ruby
      strict_range = Types.Strict(Range)
      strict_range == Types.Instance(Range) # => true
      ```
  - "`Enum#include?` is an alias to `Enum#valid?` (d-Pixie + flash-gordon)"
  - "`Range` was added (GustavoCaso)"
  - |-
    `Array` types filter out `Undefined` values, if you have an array type with a constructor type as its member, the constructor now can return `Dry::Types::Undefined` to indicate empty value:
      ```ruby
      filter_empty_strings = Types::Strict::Array.of(
        Types::Strict::String.constructor { |input|
          input.to_s.yield_self { |s| s.empty? ? Dry::Types::Undefined : s }
        }
      )
      filter_empty_strings.(["John", nil, "", "Jane"]) # => ["John", "Jane"]
      ```
  - |-
    `Types::Map` was added for homogeneous hashes, when only types of keys and values are known in advance, not specific key names (fledman + flash-gordon)
      ```ruby
        int_to_string = Types::Hash.map('strict.integer', 'strict.string')
        int_to_string[0 => 'foo'] # => { 0 => "foo" }
        int_to_string[0 => 1] # Dry::Types::MapError: input value 1 for key 0 is invalid: type?(String, 1)
      ```
  - |-
    Enum supports mappings (bolshakov + flash-gordon)
      ```ruby
      dict = Types::Strict::String.enum('draft' => 0, 'published' => 10, 'archived' => 20)
      dict['published'] # => 'published'
      dict[10] # => 'published'
      ```
  fixed:
  - Fixed applying constraints to optional type, i.e. `.optional.constrained` works
    correctly (flash-gordon)
  - Fixed enum working with optionals (flash-gordon)
  - "## Internal"
  - Dropped the `dry-configurable` dependency (GustavoCaso)
  - The gem now uses `dry-inflector` for inflections instead of `inflecto` (GustavoCaso)
- version: 0.12.2
  date: '2017-11-04'
  fixed:
  - The type compiler was fixed for simple rules such as used for strict type checks
    (flash-gordon)
  - Fixed an error on `Dry::Types['json.decimal'].try(nil)` (nesaulov)
  - Fixed an error on calling `try` on an array type built of constrained types (flash-gordon)
  - Implemented `===` for enum types (GustavoCaso)
- version: 0.12.1
  date: '2017-10-11'
  fixed:
  - "`Constructor#try` rescues `ArgumentError` (raised in cases like `Integer('foo')`)
    (flash-gordon)"
  - "`#constructor` works correctly for default and enum types (solnic)"
  - Optional sum types work correctly in `safe` mode (GustavoCaso)
  - The equalizer of constrained types respects meta (flash-gordon)
- version: 0.12.0
  date: '2017-09-15'
  added:
  - A bunch of shortcut methods for constructing types to the autogenerated module,
    e.g. `Types.Constructor(String, &:to_s)` (flash-gordon)
  - "## Deprecated"
  - "`Types::Array#member` was deprecated in favor of `Types::Array#of` (flash-gordon)"
- version: 0.11.1
  date: '2017-08-14'
  changed:
  - Constructors are now equalized using `fn` and `meta` too (flash-gordon)
  fixed:
  - Fixed `Constructor#name` with `Sum`-types (flash-gordon)
- version: 0.11.0
  date: '2017-06-30'
  added:
  - "`#to_ast` available for all type objects (GustavoCaso)"
  - "`Types::Array#of` as an alias for `#member` (maliqq)"
  - Detailed failure objects are passed to results which improves constraint violation
    messages (GustavoCaso)
- version: 0.10.3
  date: '2017-05-06'
  added:
  - Callable defaults accept the underlying type (v-kolesnikov)
- version: 0.10.2
  date: '2017-04-28'
  fixed:
  - Fixed `Type#optional?` for sum types (flash-gordon)
- version: 0.10.1
  date: '2017-04-28'
  added:
  - "`Type#optional?` returns true if type is Sum and left is nil (GustavoCaso)"
  - "`Type#pristine` returns a type without `meta` (flash-gordon)"
  fixed:
  - "`meta` is used in type equality again (solnic)"
  - "`Any` works correctly with meta again (flash-gordon)"
- version: 0.10.0
  date: '2017-04-26'
  added:
  - Types can be used in `case` statements now (GustavoCaso)
  fixed:
  - Return original value when Date.parse raises a RangeError (jviney)
  changed:
  - Meta data are now stored separately from options (flash-gordon)
  - "`Types::Object` was renamed to `Types::Any` (flash-gordon)"
- version: 0.9.4
  date: '2017-01-24'
  added:
  - Added `Types::Object` which passes an object of any type (flash-gordon)
- version: 0.9.3
  date: '2016-12-03'
  fixed:
  - Updated to dry-core >= 0.2.1 (ruby warnings are gone) (flash-gordon)
- version: 0.9.2
  date: '2016-11-13'
  added:
  - Support for `"Y"` and `"N"` as `true` and `false` values, respectively (scare21410)
  changed:
  - Optimized object allocation in hash schemas, resulting in up to 25% speed boost
    (davydovanton)
- version: 0.9.1
  date: '2016-11-04'
  fixed:
  - "`Hash#strict_with_defaults` properly evaluates callable defaults (bolshakov)"
  changed:
  - "`Hash#weak` accepts Hash-descendants again (solnic)"
- version: 0.9.0
  date: '2016-09-21'
  added:
  - "`Hash#strict_with_defaults` which validates presence of all required keys and
    respects default types for missing _values_ (backus)"
  - "`Type#constrained?` method (flash-gordon)"
  fixed:
  - Summing two constrained types works correctly (flash-gordon)
  - "`Types::Array::Member#valid?` in cases where member type is a constraint (solnic)"
  - "`Hash::Schema#try` handles exceptions properly and returns a failure object (solnic)"
  changed:
  - "[BREAKING] Renamed `Hash##{schema=>permissive}` (backus)"
  - "[BREAKING] `dry-monads` dependency was made optional, Maybe types are available
    after `Dry::Types.load_extensions(:maybe)` (flash-gordon)"
  - "[BREAKING] `Dry::Types::Struct` and `Dry::Types::Value` have been extracted to
    [`dry-struct`](https://github.com/dry-rb/dry-struct) (backus)"
  - "`Types::Form::Bool` supports upcased true/false values (kirs)"
  - "`Types::Form::{Date,DateTime,Time}` fail gracefully for invalid input (padde)"
  - ice_nine dependency has been dropped as it was required by Struct only (flash-gordon)
- version: 0.8.1
  date: '2016-07-13'
  fixed:
  - Compiler no longer chokes on type nodes without args (solnic)
  - Removed `bin/console` from gem package (solnic)
- version: 0.8.0
  date: '2016-07-01'
  added:
  - "`Struct` now implements `Type` interface so ie `SomeStruct | String` works now
    (flash-gordon)"
  - "`:weak` Hash constructor which can partially coerce a hash even when it includes
    invalid values (solnic)"
  - Types include `Dry::Equalizer` now (flash-gordon)
  fixed:
  - "`Struct#to_hash` descends into arrays too (nepalez)"
  - "`Default#with` works now (flash-gordon)"
  changed:
  - "`:symbolized` hash schema is now based on `:weak` schema (solnic)"
  - "`Struct::Value` instances are now **deeply frozen** via ice_nine (backus)"
- version: 0.7.2
  date: '2016-05-11'
  fixed:
  - "`Bool#default` gladly accepts `false` as its value (solnic)"
  - Creating an empty schema with input processor no longer fails (lasseebert)
  changed:
  - Allow multiple calls to meta (solnic)
  - Allow capitalised versions of true and false values for boolean coercions (nil0bject)
  - Replace kleisli with dry-monads (flash-gordon)
  - Use coercions from Kernel (flash-gordon)
  - Decimal coercions now work with Float (flash-gordon)
  - Coerce empty strings in form posts to blank arrays and hashes (timriley)
  - update to use dry-logic v0.2.3 (fran-worley)
- version: 0.7.1
  date: '2016-04-06'
  added:
  - "`JSON::*` types with JSON-specific coercions (coop)"
  fixed:
  - Schema is properly inherited in Struct (backus)
  - "`constructor_type` is properly inherited in Struct (fbernier)"
- version: 0.7.0
  date: '2016-03-30'
  summary: Major focus of this release is to make complex type composition possible
    and improving constraint errors to be more meaningful.
  added:
  - "`Type#try` interface that tries to process the input and return a result object
    which can be either a success or failure (solnic)"
  - "`#meta` interface for setting arbitrary meta data on types (solnic)"
  - "`ConstraintError` has a message which includes information about the predicate
    which failed ie `nil violates constraints (type?(String) failed)` (solnic)"
  - "`Struct` uses `Dry::Equalizer` too, just like `Value` (AMHOL)"
  - "`Sum::Constrained` which has a disjunction rule built from its types (solnic)"
  - Compiler supports `[:constructor, [primitive, fn_proc]]` nodes (solnic)
  - Compiler supports building schema-less `form.hash` types (solnic)
  fixed:
  - "`Sum` now supports complex types like `Array` or `Hash` with member types and/or
    constraints (solnic)"
  - "`Default#constrained` will properly wrap a new constrained type (solnic)"
  changed:
  - "[BREAKING] Renamed `Type#{optional=>maybe}` (AMHOL)"
  - "[BREAKING] `Type#optional(other)` builds a sum: `Strict::Nil | other` (AMHOL)"
  - "[BREAKING] Type objects are now frozen (solnic)"
  - "[BREAKING] `Value` instances are frozen (AMHOL)"
  - "`Array` is no longer a constructor and has a `Array::Member` subclass (solnic)"
  - "`Hash` is no longer a constructor and is split into `Hash::Safe`, `Hash::Strict`
    and `Hash::Symbolized` (solnic)"
  - "`Constrained` has now a `Constrained::Coercible` subclass which will try to apply
    its type prior applying its rule (solnic)"
  - "`#maybe` uses `Strict::Nil` now (solnic)"
  - "`Type#default` will raise if `nil` was passed for `Maybe` type (solnic)"
  - "`Hash` with a schema will set maybe values for missing keys or nils (flash-gordon)"
- version: 0.6.0
  date: '2016-03-16'
  summary: 'Renamed from `dry-data` to `dry-types` and:'
  added:
  - |-
    `Dry::Types.module` which returns a namespace for inclusion which has all
      built-in types defined as constants (solnic)
  - "`Hash#schema` supports default values now (solnic)"
  - "`Hash#symbolized` passes through keys that are already symbols (solnic)"
  - "`Struct.new` uses an empty hash by default as input (solnic)"
  - "`Struct.constructor_type` macro can be used to change attributes constructor
    (solnic)"
  - "`default` accepts a block now for dynamic values (solnic)"
  - |-
    `Types.register_class` accepts a second arg which is the name of the class'
      constructor method, defaults to `:new` (solnic)
  fixed:
  - "`Struct` will simply pass-through the input if it is already a struct (solnic)"
  - "`default` will raise if a value violates constraints (solnic)"
  - |-
    Evaluating a default value tries to use type's constructor which makes it work
      with types that may coerce an input into nil (solnic)
  - "`enum` works just fine with integer-values (solnic)"
  - "`enum` + `default` works just fine (solnic)"
  - |-
    `Optional` no longer responds to `primitive` as it makes no sense since there's
      no single primitive for an optional value (solnic)
  - "`Optional` passes-through a value which is already a maybe (solnic)"
  changed:
  - "`Dry::Types::Definition` is now the base type definition object (solnic)"
  - "`Dry::Types::Constructor` is now a type definition with a constructor function
    (solnic)"
- version: 0.5.1
  date: '2016-01-11'
  added:
  - |-
    `Dry::Data::Type#safe` for types which can skip constructor when primitive does
      not match input's class (solnic)
  - "`form.array` and `form.hash` safe types (solnic)"
- version: 0.5.0
  date: '2016-01-11'
  added:
  - "`Type#default` interface for defining a type with a default value (solnic)"
  changed:
  - "[BREAKING] `Dry::Data::Type.new` accepts constructor and _options_ now (solnic)"
  - Renamed `Dry::Data::Type::{Enum,Constrained}` => `Dry::Data::{Enum,Constrained}`
    (solnic)
  - "`dry-logic` is now a dependency for constrained types (solnic)"
  - Constrained types are now always available (solnic)
  - "`strict.*` category uses constrained types with `:type?` predicate (solnic)"
  - "`SumType#call` no longer needs to rescue from `TypeError` (solnic)"
  fixed:
  - "`attribute` raises proper error when type definition is missing (solnic)"
- version: 0.4.2
  date: '2015-12-27'
  added:
  - Support for arrays in type compiler (solnic)
  changed:
  - Array member uses type objects now rather than just their constructors (solnic)
- version: 0.4.0
  date: '2015-12-11'
  added:
  - Support for sum-types with constraint type (solnic)
  - "`Dry::Data::Type#optional` for defining optional types (solnic)"
  changed:
  - "`Dry::Data['optional']` was **removed** in favor of `Dry::Data::Type#optional`
    (solnic)"
- version: 0.3.2
  date: '2015-12-10'
  added:
  - "`Dry::Data::Value` which works like a struct but is a value object with equalizer
    (solnic)"
  fixed:
  - Added missing require for `dry-equalizer` (solnic)
- version: 0.3.1
  date: '2015-12-09'
  changed:
  - Removed require of constrained type and make it optional (solnic)
- version: 0.3.0
  date: '2015-12-09'
  added:
  - "`Type#constrained` interface for defining constrained types (solnic)"
  - "`Dry::Data` can be configured with a type namespace (solnic)"
  - "`Dry::Data.finalize` can be used to define types as constants under configured
    namespace (solnic)"
  - "`Dry::Data::Type#enum` for defining an enum from a specific type (solnic)"
  - 'New types: `symbol` and `class` along with their `strict` versions (solnic)'
- version: 0.2.1
  date: '2015-11-30'
  added:
  - Type compiler supports nested hashes now (solnic)
  fixed:
  - "`form.bool` sum is using correct right-side `form.false` type (solnic)"
  changed:
  - Improved structure of the ast (solnic)
- version: 0.2.0
  date: '2015-11-29'
  added:
  - "`form.nil` which coerces empty strings to `nil` (solnic)"
  - "`bool` sum-type (true | false) (solnic)"
  - Type compiler supports sum-types now (solnic)
  changed:
  - Constructing optional types uses the new `Dry::Data["optional"]` built-in type
    (solnic)
- version: 0.1.0
  date: '2015-11-27'
  added:
  - "`form.*` coercible types (solnic)"
  - "`Type::Hash#strict` for defining hashes with a strict schema (solnic)"
  - "`Type::Hash#symbolized` for defining hashes that will symbolize keys (solnic)"
  - |-
    `Dry::Data.register_class` short-cut interface for registering a class and
      setting its `.new` method as the constructor (solnic)
  - "`Dry::Data::Compiler` for building a type from a simple ast (solnic)"
- version: 0.0.1
  date: '2015-10-05'
  summary: First public release