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Class: RBS::VarianceCalculator::Result

Relationships & Source Files
Inherits: Object
Defined in: lib/rbs/variance_calculator.rb

Class Method Summary

Instance Attribute Summary

Instance Method Summary

Constructor Details

.new(variables:) ⇒ Result

[ GitHub ] 

  


# File 'lib/rbs/variance_calculator.rb', line 8



def initialize(variables:)
  @result = {}
  variables.each do |x|
    result[x] = :unused
  end
end


  







Instance Attribute Details



  

    #result   (readonly)
  

  [ GitHub ]


  

  


# File 'lib/rbs/variance_calculator.rb', line 6



attr_reader :result


  







Instance Method Details



  

    #compatible?(var, with_annotation:)  ⇒ Boolean 
  



  

    
  





  


  [ GitHub ]


  

  


# File 'lib/rbs/variance_calculator.rb', line 45



def compatible?(var, with_annotation:)
  variance = result[var]

  case
  when variance == :unused
    true
  when with_annotation == :invariant
    true
  when variance == with_annotation
    true
  else
    false
  end
end


  








  

    #contravariant(x)  
  

  [ GitHub ]


  

  


# File 'lib/rbs/variance_calculator.rb', line 24



def contravariant(x)
  case result[x]
  when :unused
    result[x] = :contravariant
  when :covariant
    result[x] = :invariant
  end
end


  








  

    #covariant(x)  
  

  [ GitHub ]


  

  


# File 'lib/rbs/variance_calculator.rb', line 15



def covariant(x)
  case result[x]
  when :unused
    result[x] = :covariant
  when :contravariant
    result[x] = :invariant
  end
end


  








  

    #each(&block)  
  

  [ GitHub ]


  

  


# File 'lib/rbs/variance_calculator.rb', line 37



def each(&block)
  result.each(&block)
end


  








  

    #include?(name)  ⇒ Boolean 
  



  

    
  





  


  [ GitHub ]


  

  


# File 'lib/rbs/variance_calculator.rb', line 41



def include?(name)
  result.key?(name)
end


  








  

    #incompatible?(params)  ⇒ Boolean 
  



  

    
  





  


  [ GitHub ]


  

  


# File 'lib/rbs/variance_calculator.rb', line 60



def incompatible?(params)
  # @type set: Hash[Symbol]
  set = Set[]

  params.each do |param|
    unless compatible?(param.name, with_annotation: param.variance)
      set << param.name
    end
  end

  unless set.empty?
    set
  end
end


  








  

    #invariant(x)  
  

  [ GitHub ]


  

  


# File 'lib/rbs/variance_calculator.rb', line 33



def invariant(x)
  result[x] = :invariant
end