Haskell implementation of Gradually Polymorphic Calculus
        
      
     
  
    
    
    
    
      
      
        
          Consistent subtyping is employed in some gradual type systems to validate type conversions. The original definition by Siek and Taha serves as a guideline for designing gradual type systems with subtyping. Polymorphic types à la System F also induce …
        
      
     
  
    
    
    
    
      
      
        
          Consistent subtyping is employed in some gradual type systems to validate type conversions. The original definition by Siek and Taha serves as a guideline for designing many gradual type systems with subtyping. Polymorphic types `a la System F also …