Class: Kleisli::Future

Inherits:
Monad show all
Defined in:
lib/kleisli/future.rb

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Monad

#>>

Constructor Details

#initialize(t) ⇒ Future

Returns a new instance of Future.



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# File 'lib/kleisli/future.rb', line 13

def initialize(t)
  @t = t
end

Class Method Details

.lift(v = nil, &block) ⇒ Object 



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# File 'lib/kleisli/future.rb', line 5

def self.lift(v=nil, &block)
  if block
    new(Thread.new(&block))
  else
    new(Thread.new { v })
  end
end

Instance Method Details

#>(f) ⇒ Object 



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# File 'lib/kleisli/future.rb', line 17

def >(f)
  f.call(-> { await })
end

#await ⇒ Object 



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# File 'lib/kleisli/future.rb', line 25

def await
  @t.join.value
end

#fmap(&f) ⇒ Object 



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# File 'lib/kleisli/future.rb', line 21

def fmap(&f)
  Future.lift(f.call(-> { await }))
end