Changes between Version 386 and Version 387 of TypeFunctionsStatus


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Timestamp:
Oct 2, 2008 4:58:50 AM (6 years ago)
Author:
chak
Comment:

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  • TypeFunctionsStatus

    v386 v387  
    2020 
    2121 * Constraint simplification: 
    22   * #2448 (givens not properly used in superclass entailment check) 
    2322  * #2102 (superclass equalities) 
    2423    * To fix superclass equalities (specifically getting the coercion evidence), we could introduce a kind of typelet just for evidence.  In fact, re-use `HsBind.VarBind` and make its right-hand side a specially data structure describing evidence construction, instead of being a general `HsExpr`.  That evidence construction generation can have a case for extracting superclass constraints.  The desugarer than has to generate the case expression bringing the equality in scope from that.