• Simon Peyton Jones's avatar
    This BIG PATCH contains most of the work for the New Coercion Representation · fdf86568
    Simon Peyton Jones authored
    See the paper "Practical aspects of evidence based compilation in System FC"
    
    * Coercion becomes a data type, distinct from Type
    
    * Coercions become value-level things, rather than type-level things,
      (although the value is zero bits wide, like the State token)
      A consequence is that a coerion abstraction increases the arity by 1
      (just like a dictionary abstraction)
    
    * There is a new constructor in CoreExpr, namely Coercion, to inject
      coercions into terms
    fdf86568
Desugar.lhs 14.3 KB