Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Revert "Approximate MatchTypes with lub of case bodies, if non-recursive" in 3.5.0 #21266

Merged
merged 2 commits into from
Jul 29, 2024
Merged

Revert "Approximate MatchTypes with lub of case bodies, if non-recursive" in 3.5.0 #21266

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
318054e
Revert "Approximate MatchTypes with lub of case bodies, if non-recurs…
WojciechMazur Jul 24, 2024
51629a2
Fix failing run-macros/type-show test
WojciechMazur Jul 24, 2024
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
7 changes: 0 additions & 7 deletions compiler/src/dotty/tools/dotc/core/TypeComparer.scala
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -2904,13 +2904,6 @@ class TypeComparer(@constructorOnly initctx: Context) extends ConstraintHandling
tp
case tp: HKTypeLambda =>
tp
case tp: ParamRef =>
val st = tp.superTypeNormalized
if st.exists then
disjointnessBoundary(st)
else
// workaround for when ParamRef#underlying returns NoType
defn.AnyType
case tp: TypeProxy =>
disjointnessBoundary(tp.superTypeNormalized)
case tp: WildcardType =>
Expand Down
10 changes: 1 addition & 9 deletions compiler/src/dotty/tools/dotc/typer/Typer.scala
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -2569,15 +2569,7 @@ class Typer(@constructorOnly nestingLevel: Int = 0) extends Namer
report.error(MatchTypeScrutineeCannotBeHigherKinded(sel1Tpe), sel1.srcPos)
val pt1 = if (bound1.isEmpty) pt else bound1.tpe
val cases1 = tree.cases.mapconserve(typedTypeCase(_, sel1Tpe, pt1))
val bound2 = if tree.bound.isEmpty then
val lub = cases1.foldLeft(defn.NothingType: Type): (acc, case1) =>
if !acc.exists then NoType
else if case1.body.tpe.isProvisional then NoType
else acc | case1.body.tpe
if lub.exists then TypeTree(lub, inferred = true)
else bound1
else bound1
assignType(cpy.MatchTypeTree(tree)(bound2, sel1, cases1), bound2, sel1, cases1)
assignType(cpy.MatchTypeTree(tree)(bound1, sel1, cases1), bound1, sel1, cases1)
}

def typedByNameTypeTree(tree: untpd.ByNameTypeTree)(using Context): ByNameTypeTree = tree.result match
Expand Down
2 changes: 1 addition & 1 deletion tests/pos/13633.scala
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -21,7 +21,7 @@ object Sums extends App:

type Reverse[A] = ReverseLoop[A, EmptyTuple]

type PlusTri[A, B, C] <: Tuple = (A, B, C) match
type PlusTri[A, B, C] = (A, B, C) match
case (false, false, false) => (false, false)
case (true, false, false) | (false, true, false) | (false, false, true) => (false, true)
case (true, true, false) | (true, false, true) | (false, true, true) => (true, false)
Expand Down
7 changes: 0 additions & 7 deletions tests/pos/Tuple.Drop.scala
View file
Open in desktop

This file was deleted.

7 changes: 0 additions & 7 deletions tests/pos/Tuple.Elem.scala
View file
Open in desktop

This file was deleted.

11 changes: 0 additions & 11 deletions tests/pos/i19710.scala
View file
Open in desktop

This file was deleted.

2 changes: 1 addition & 1 deletion tests/run-macros/type-show/Test_2.scala
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -23,7 +23,7 @@ object Test {
"""TypeRef(ThisType(TypeRef(NoPrefix(), "scala")), "Nothing"), """+
"""TypeRef(ThisType(TypeRef(NoPrefix(), "scala")), "Any"))), """+
"""MatchType("""+
"""TypeRef(TermRef(ThisType(TypeRef(NoPrefix(), "<root>")), "scala"), "Int"), """+ // match type bound
"""TypeRef(ThisType(TypeRef(NoPrefix(), "scala")), "Any"), """+ // match type bound
"""ParamRef(binder, 0), """+
"""List("""+
"""MatchCase("""+
Expand Down
Loading