Changes between Version 204 and Version 205 of TypeFunctionsStatus


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Timestamp:
Sep 11, 2007 3:41:33 AM (7 years ago)
Author:
chak
Comment:

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  • TypeFunctionsStatus

    v204 v205  
    44 
    55'''Debugging of type families:''' 
     6 0. We would need swapInsts for wanted constraints.  However, an alternative is to get rid of swapInst altogether and to make substInst a bit smarter (so it also applies wrongly-oriented equalities properly). 
    67 0. `boxySplitTyConApp` and friends must be able to deal with `orig_ty`s that have outermost type family applications; i.e., they need to try to normalise and possibly have to defer.  They also need to defer on skolems.  Consequently, they also need to return a coercion.  This , in particular, affects the treatment of literal lists, parallel arrays, and tuples in`TcExpr.tcExpr` is fishy. 
    7  0. We would need swapInsts for wanted constraints.  However, an alternative is to get rid of swapInst altogether and to make substInst a bit smarter (so it also applies wrongly-oriented equalities properly). 
    88 0. To move GADT type checking from refinements to equalities, proceed as follows (as suggested by SPJ): 
    99    * Implemented this as follows in `TcPat.tcConPat:579:`