Class: Literal::Types::UnionType

Inherits:
Object
  • Object
show all
Includes:
Enumerable, Literal::Type
Defined in:
lib/literal/types/union_type.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(*queue) ⇒ UnionType

Returns a new instance of UnionType.

Raises:



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# File 'lib/literal/types/union_type.rb', line 7

def initialize(*queue)
  raise Literal::ArgumentError.new("_Union type must have at least one type.") if queue.size < 1
  types = []
  primitives = Set[]

  while queue.length > 0
    type = queue.shift
    case type
    when Literal::Types::UnionType
      queue.concat(type.types, type.primitives.to_a)
    when Array, Hash, String, Symbol, Integer, Float, Complex, Rational, true, false, nil
      primitives << type
    else
      types << type
    end
  end

  types.uniq!
  @types = types
  @primitives = primitives

  @types.freeze
  @primitives.freeze
  freeze
end

Instance Attribute Details

#primitives ⇒ Object (readonly)

Returns the value of attribute primitives.



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# File 'lib/literal/types/union_type.rb', line 33

def primitives
  @primitives
end

#types ⇒ Object (readonly)

Returns the value of attribute types.



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# File 'lib/literal/types/union_type.rb', line 33

def types
  @types
end

Instance Method Details

#===(value) ⇒ Object 



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# File 'lib/literal/types/union_type.rb', line 39

def ===(value)
  return true if @primitives.include?(value)

  types = @types

  i, len = 0, types.size
  while i < len
    return true if types[i] === value
    i += 1
  end

  false
end

#>=(other) ⇒ Object 



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# File 'lib/literal/types/union_type.rb', line 72

def >=(other)
  types = @types
  primitives = @primitives

  case other
  when Literal::Types::UnionType
    types_have_at_least_one_subtype = other.types.all? do |other_type|
      primitives.any? { |p| Literal.subtype?(other_type, p) } || types.any? { |t| Literal.subtype?(other_type, t) }
    end

    primitives_have_at_least_one_subtype = other.primitives.all? do |other_primitive|
      primitives.any? { |p| Literal.subtype?(other_primitive, p) } || types.any? { |t| Literal.subtype?(other_primitive, t) }
    end

    types_have_at_least_one_subtype && primitives_have_at_least_one_subtype
  else
    types.any? { |t| Literal.subtype?(other, t) } || primitives.any? { |p| Literal.subtype?(other, p) }
  end
end

#[](key) ⇒ Object 



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# File 'lib/literal/types/union_type.rb', line 62

def [](key)
  if @primitives.include?(key) || @types.include?(key)
    key
  end
end

#deconstruct ⇒ Object 



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# File 'lib/literal/types/union_type.rb', line 58

def deconstruct
  to_a
end

#each ⇒ Object 



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# File 'lib/literal/types/union_type.rb', line 53

def each(&)
  @primitives.each(&)
  @types.each(&)
end

#fetch(key) ⇒ Object 



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# File 'lib/literal/types/union_type.rb', line 68

def fetch(key)
  self[key] or raise KeyError.new("Key not found: #{key.inspect}")
end

#inspect ⇒ Object 



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# File 'lib/literal/types/union_type.rb', line 35

def inspect
  "_Union(#{to_a.map(&:inspect).join(', ')})"
end