Class: T::Private::Types::SimplePairUnion

Inherits:
Types::Union show all
Defined in:
lib/types/private/types/simple_pair_union.rb

Overview

Specialization of Union for the common case of the union of two simple types.

This covers e.g. T.nilable(SomeModule), T.any(Integer, Float), and T::Boolean.

Defined Under Namespace

Classes: DuplicateType

Instance Method Summary collapse

Methods inherited from Types::Union

#build_type, #name

Methods inherited from Types::Base

#==, #describe_obj, #error_message_for_obj, #error_message_for_obj_recursive, #hash, method_added, #subtype_of?, #to_s, #validate!

Constructor Details

#initialize(type_a, type_b) ⇒ SimplePairUnion

Returns a new instance of SimplePairUnion.

Parameters:



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# File 'lib/types/private/types/simple_pair_union.rb', line 12

def initialize(type_a, type_b)
  if type_a == type_b
    raise DuplicateType.new("#{type_a} == #{type_b}")
  end

  @raw_a = type_a.raw_type
  @raw_b = type_b.raw_type
end

Instance Method Details

#recursively_valid?(obj) ⇒ Boolean

Returns:



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# File 'lib/types/private/types/simple_pair_union.rb', line 22

def recursively_valid?(obj)
  obj.is_a?(@raw_a) || obj.is_a?(@raw_b)
end

#types ⇒ Object 



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# File 'lib/types/private/types/simple_pair_union.rb', line 32

def types
  # We reconstruct the simple types rather than just storing them because
  # (1) this is normally not a hot path and (2) we want to keep the instance
  # variable count <= 3 so that we can fit in a 40 byte heap entry along
  # with object headers.
  @types ||= [
    T::Types::Simple::Private::Pool.type_for_module(@raw_a),
    T::Types::Simple::Private::Pool.type_for_module(@raw_b),
  ]
end

#unwrap_nilable ⇒ Object

overrides Union



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# File 'lib/types/private/types/simple_pair_union.rb', line 44

def unwrap_nilable
  a_nil = @raw_a.equal?(NilClass)
  b_nil = @raw_b.equal?(NilClass)
  if a_nil
    return types[1]
  end
  if b_nil
    return types[0]
  end
  nil
end

#valid?(obj) ⇒ Boolean

Returns:



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# File 'lib/types/private/types/simple_pair_union.rb', line 27

def valid?(obj)
  obj.is_a?(@raw_a) || obj.is_a?(@raw_b)
end