Class: Kind::Either::Right

Inherits:
Monad
  • Object
show all
Defined in:
lib/kind/either/right.rb

Instance Attribute Summary

Attributes inherited from Monad

#value

Instance Method Summary collapse

Methods inherited from Monad

#===, #either?, #initialize, #left?, #on, #on_left, #on_right

Constructor Details

This class inherits a constructor from Kind::Either::Monad

Instance Method Details

#inspect ⇒ Object 



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# File 'lib/kind/either/right.rb', line 34

def inspect
  '#<%s value=%p>' % ['Kind::Right', value]
end

#map(&fn) ⇒ Object Also known as: then, and_then 



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# File 'lib/kind/either/right.rb', line 13

def map(&fn)
  map!(&fn)
rescue Kind::Monad::Error => e
  raise e
rescue StandardError => e
  Either::Left[e]
end

#map!(&fn) ⇒ Object Also known as: then!, and_then!

Raises:



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# File 'lib/kind/either/right.rb', line 21

def map!(&fn)
  monad = fn.call(@value)

  return monad if Either::Monad === monad

  raise Kind::Monad::Error.new('Kind::Right | Kind::Left', monad)
end

#right? ⇒ Boolean

Returns:



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# File 'lib/kind/either/right.rb', line 5

def right?
  true
end

#value_or(_default = UNDEFINED, &block) ⇒ Object 



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# File 'lib/kind/either/right.rb', line 9

def value_or(_default = UNDEFINED, &block)
  @value
end