Class: Stupidedi::Either::Success

Inherits:
Stupidedi::Either show all
Defined in:
lib/stupidedi/either.rb

Direct Known Subclasses

Reader::Success

Filtering the Value collapse

Transforming the Value collapse

Instance Method Summary collapse

Methods inherited from Stupidedi::Either

failure, success

Constructor Details

#initialize(value) ⇒ Success

Returns a new instance of Success.



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# File 'lib/stupidedi/either.rb', line 42

def initialize(value)
  @value = value
end

Instance Method Details

#==(other) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/stupidedi/either.rb', line 129

def ==(other)
  other.is_a?(Either) and other.select{|x| x == @value }.defined?
end

#copy(changes = {}) ⇒ Object 



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# File 'lib/stupidedi/either.rb', line 46

def copy(changes = {})
  Success.new \
    changes.fetch(:value, @value)
end

#defined? ⇒ Boolean

Returns true.

Returns:

  • (Boolean) —

    true



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# File 'lib/stupidedi/either.rb', line 52

def defined?
  true
end

#explain ⇒ Success

Returns:



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# File 'lib/stupidedi/either.rb', line 117

def explain
  self
end

#fetch(default = nil) ⇒ Object 



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# File 'lib/stupidedi/either.rb', line 56

def fetch(default = nil)
  @value
end

#flatmap {|value| ... } ⇒ Either

Yield Parameters:

  • value

Yield Returns:

Returns:



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# File 'lib/stupidedi/either.rb', line 101

def flatmap(&block)
  result = deconstruct(block)

  if result.is_a?(Either)
    result
  else
    raise TypeError, "block did not return an instance of Either"
  end
end

#inspect ⇒ String

Returns:



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# File 'lib/stupidedi/either.rb', line 143

def inspect
  "Either.success(#{@value.inspect})"
end

#map {|value| ... } ⇒ Success

Yield Parameters:

  • value

Yield Returns:

  • value

Returns:



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# File 'lib/stupidedi/either.rb', line 94

def map(&block)
  copy(:value => deconstruct(block))
end

#or ⇒ Success

Returns:



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# File 'lib/stupidedi/either.rb', line 112

def or
  self
end

#pretty_print(q) ⇒ void

This method returns an undefined value.



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# File 'lib/stupidedi/either.rb', line 134

def pretty_print(q)
  q.text("Either.success")
  q.group(2, "(", ")") do
    q.breakable ""
    q.pp @value
  end
end

#reject(reason = "reject") {|value| ... } ⇒ Either

Yield Parameters:

  • value

Yield Returns:

  • (Boolean)

Returns:



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# File 'lib/stupidedi/either.rb', line 77

def reject(reason = "reject", &block)
  if deconstruct(block)
    failure(reason)
  else
    self
  end
end

#select(reason = "select") {|value| ... } ⇒ Either

Yield Parameters:

  • value

Yield Returns:

  • (Boolean)

Returns:



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# File 'lib/stupidedi/either.rb', line 66

def select(reason = "select", &block)
  if deconstruct(block)
    self
  else
    failure(reason)
  end
end

#tap(&block) ⇒ Object 



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# File 'lib/stupidedi/either.rb', line 124

def tap(&block)
  deconstruct(block); self
end