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|
# frozen_string_literal: true
require 'dry/core/deprecations'
require 'dry/types/builder'
require 'dry/types/result'
require 'dry/types/options'
require 'dry/types/meta'
module Dry
module Types
# Nominal types define a primitive class and do not apply any constructors or constraints
#
# Use these types for annotations and the base for building more complex types on top of them.
#
# @api public
class Nominal
include Type
include Options
include Meta
include Builder
include Printable
include Dry::Equalizer(:primitive, :options, :meta, inspect: false, immutable: true)
# @return [Class]
attr_reader :primitive
# @param [Class] primitive
#
# @return [Type]
#
# @api private
def self.[](primitive)
if primitive == ::Array
Types::Array
elsif primitive == ::Hash
Types::Hash
else
self
end
end
ALWAYS = proc { true }
# @param [Type,Class] primitive
# @param [Hash] options
#
# @api private
def initialize(primitive, **options)
super
@primitive = primitive
freeze
end
# @return [String]
#
# @api public
def name
primitive.name
end
# @return [false]
#
# @api public
def default?
false
end
# @return [false]
#
# @api public
def constrained?
false
end
# @return [false]
#
# @api public
def optional?
false
end
# @param [BasicObject] input
#
# @return [BasicObject]
#
# @api private
def call_unsafe(input)
input
end
# @param [BasicObject] input
#
# @return [BasicObject]
#
# @api private
def call_safe(input)
input
end
# @param [Object] input
# @param [#call,nil] block
#
# @yieldparam [Failure] failure
# @yieldreturn [Result]
#
# @return [Result,Logic::Result] when a block is not provided
# @return [nil] otherwise
#
# @api public
def try(input)
success(input)
end
# @param (see Dry::Types::Success#initialize)
#
# @return [Result::Success]
#
# @api public
def success(input)
Result::Success.new(input)
end
# @param (see Failure#initialize)
#
# @return [Result::Failure]
#
# @api public
def failure(input, error)
raise ArgumentError, 'error must be a CoercionError' unless error.is_a?(CoercionError)
Result::Failure.new(input, error)
end
# Checks whether value is of a #primitive class
#
# @param [Object] value
#
# @return [Boolean]
#
# @api public
def primitive?(value)
value.is_a?(primitive)
end
# @api private
def coerce(input, &_block)
if primitive?(input)
input
elsif block_given?
yield
else
raise CoercionError, "#{input.inspect} must be an instance of #{primitive}"
end
end
# @api private
def try_coerce(input)
result = success(input)
coerce(input) do
result = failure(
input,
CoercionError.new("#{input.inspect} must be an instance of #{primitive}")
)
end
if block_given?
yield(result)
else
result
end
end
# Return AST representation of a type nominal
#
# @return [Array]
#
# @api public
def to_ast(meta: true)
[:nominal, [primitive, meta ? self.meta : EMPTY_HASH]]
end
# Return self. Nominal types are lax by definition
#
# @return [Nominal]
#
# @api public
def lax
self
end
# Wrap the type with a proc
#
# @return [Proc]
#
# @api public
def to_proc
ALWAYS
end
end
extend Dry::Core::Deprecations[:'dry-types']
Definition = Nominal
deprecate_constant(:Definition, message: 'Nominal')
end
end
require 'dry/types/array'
require 'dry/types/hash'
require 'dry/types/map'
|
