Module: RedBlocks::SetOptimizer

Included in:
Set
Defined in:
lib/red_blocks/set_optimizer.rb

Instance Method Summary collapse

Instance Method Details

#unset ⇒ Object

Remove intersection set(and union set) that has one set. i.e. ‘IntersectionSet.new()` is always equal to `some_set`. So we can remove it.



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# File 'lib/red_blocks/set_optimizer.rb', line 6

def unset
  case self
  when RedBlocks::ComposedSet
    if self.sets.size == 1
      self.sets.first
    else
      new_set = self.dup
      new_set.sets = self.sets.map { |set| set.unset }
      new_set
    end
  when RedBlocks::Set
    self
  else
    raise TypeError.new("Expected a set but got #{self}")
  end
end