Module: Maybe

Defined in:
lib/maybe.rb

Defined Under Namespace

Classes: Just, Nothing

Class Method Summary collapse

Class Method Details

.match(m, just:, nothing:) ⇒ Object 



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# File 'lib/maybe.rb', line 17

def self.match(m, just:, nothing:)
  if m.is_just?
    just.call(m.send(:val))
  elsif m.is_nothing?
    if nothing.is_a? Proc
      nothing.call
    else
      nothing
    end
  end
end

.new(&block) ⇒ Object 



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# File 'lib/maybe.rb', line 4

def self.new(&block)
  val = begin
          block.call()
        rescue Exception => e
          e
        end
  if val.nil? || val.is_a?(Exception)
    Nothing.new
  else
    Just.new val
  end
end