Keep correct kind when preparing constraint in stripParams #14761
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smarter
requested changes
Mar 23, 2022
| @@ -248,7 +248,7 @@ class OrderingConstraint(private val boundsMap: ParamBounds, | |||
| NoType | |||
| case tp: TypeBounds => | |||
| val lo1 = stripParams(tp.lo, todos, !isUpper).orElse(defn.NothingType) | |||
| val hi1 = stripParams(tp.hi, todos, isUpper).orElse(defn.AnyKindType) | |||
| val hi1 = stripParams(tp.hi, todos, isUpper).orElse(tp.kind) | |||
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You should be able to use TypeApplications#topType instead which I needed for the same reason :).
Suggested change
| val hi1 = stripParams(tp.hi, todos, isUpper).orElse(tp.kind) | |
| val hi1 = stripParams(tp.hi, todos, isUpper).orElse(tp.topType) |
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Ah, thanks! I had not remembered that.
topType already does what we need here, and it is also correct for classes.
Linyxus
approved these changes
Mar 23, 2022
smarter
reviewed
Mar 23, 2022
| @@ -229,7 +229,11 @@ class TypeApplications(val self: Type) extends AnyVal { | |||
| (alias ne self) && alias.hasSimpleKind | |||
| } | |||
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| /** The top type with the same kind as `self`. */ | |||
| /** The top type with the same kind as `self`. This is largest type capturing | |||
| * the parameter shape of a type without looking at precise bounds. | |||
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In fact, topType does keep around precise bounds (e.g., [X <: Int] =>> Any), though it could be tweaked to map the bounds themselves to topType if needed.
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Fixes #14760