Skip to content

Navigation Menu

Sign in
Appearance settings

Search code, repositories, users, issues, pull requests...

Provide feedback

We read every piece of feedback, and take your input very seriously.

Saved searches

Use saved searches to filter your results more quickly
Sign up
Appearance settings

Commit 63931ec

Browse files
Revert "Disable distribution of intersection types over applied types"
1 parent b6db698 commit 63931ec

34 files changed

+102
-215
lines changed

‎compiler/src/dotty/tools/dotc/config/SourceVersion.scala‎

Lines changed: 0 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -44,8 +44,6 @@ enum SourceVersion:
4444
def enablesNewGivens = isAtLeast(`3.6`)
4545
def enablesNamedTuples = isAtLeast(`3.7`)
4646
def enablesBetterFors(using Context) = isAtLeast(`3.8`) || (isAtLeast(`3.7`) && isPreviewEnabled)
47-
/** See PR #23441 and tests/neg/i23435-min */
48-
def enablesDistributeAnd = !isAtLeast(`3.8`)
4947

5048
def requiresNewSyntax = isAtLeast(future)
5149

‎compiler/src/dotty/tools/dotc/core/Definitions.scala‎

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -460,7 +460,7 @@ class Definitions {
460460
@tu lazy val CBCompanion: TypeSymbol = // type `<context-bound-companion>`[-Refs]
461461
enterPermanentSymbol(tpnme.CBCompanion,
462462
TypeBounds(NothingType,
463-
HKTypeLambda(tpnme.syntheticTypeParamName(0) :: Nil)(
463+
HKTypeLambda(tpnme.syntheticTypeParamName(0) :: Nil, Contravariant::Nil)(
464464
tl => TypeBounds.empty :: Nil,
465465
tl => AnyType))).asType
466466

‎compiler/src/dotty/tools/dotc/core/NamerOps.scala‎

Lines changed: 3 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -307,7 +307,7 @@ object NamerOps:
307307
* The context-bound companion has as name the name of `tsym` translated to
308308
* a term name. We create a synthetic val of the form
309309
*
310-
* val A: `<context-bound-companion>`[witnessRef1] & ... & `<context-bound-companion>`[witnessRefN]
310+
* val A: `<context-bound-companion>`[witnessRef1 | ... | witnessRefN]
311311
*
312312
* where
313313
*
@@ -325,7 +325,8 @@ object NamerOps:
325325
prefix.select(params.find(_.name == witnessName).get)
326326
else
327327
witnessNames.map(TermRef(prefix, _))
328-
val cbtype = witnessRefs.map(defn.CBCompanion.typeRef.appliedTo).reduce(AndType.apply)
328+
val cbtype = defn.CBCompanion.typeRef.appliedTo:
329+
witnessRefs.reduce[Type](OrType(_, _, soft = false))
329330
val cbc = newSymbol(
330331
ctx.owner, companionName,
331332
(tsym.flagsUNSAFE & (AccessFlags)).toTermFlags | Synthetic,

‎compiler/src/dotty/tools/dotc/core/SymUtils.scala‎

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -88,7 +88,7 @@ class SymUtils:
8888
}
8989

9090
def isContextBoundCompanion(using Context): Boolean =
91-
self.is(Synthetic) && self.infoOrCompleter.isContextBoundCompanion
91+
self.is(Synthetic) && self.infoOrCompleter.typeSymbol == defn.CBCompanion
9292

9393
def isDummyCaptureParam(using Context): Boolean =
9494
self.is(PhantomSymbol) && self.infoOrCompleter.typeSymbol != defn.CBCompanion

‎compiler/src/dotty/tools/dotc/core/TypeApplications.scala‎

Lines changed: 2 additions & 10 deletions
Original file line numberDiff line numberDiff line change
@@ -8,7 +8,6 @@ import Symbols.*
88
import SymDenotations.LazyType
99
import Decorators.*
1010
import util.Stats.*
11-
import config.Feature.sourceVersion
1211
import Names.*
1312
import StdNames.nme
1413
import Flags.{Module, Provisional}
@@ -476,20 +475,13 @@ class TypeApplications(val self: Type) extends AnyVal {
476475
self.derivedExprType(tp.translateParameterized(from, to))
477476
case _ =>
478477
if (self.derivesFrom(from)) {
479-
// NOTE: we assume the `To` class is covariant s.t.
480-
// `To[T] X To[U] <:< To[T | U]` where X ::= `&` | `|`
481478
def elemType(tp: Type): Type = tp.widenDealias match
482479
case tp: OrType =>
483480
if tp.tp1.isBottomType then elemType(tp.tp2)
484481
else if tp.tp2.isBottomType then elemType(tp.tp1)
485482
else tp.derivedOrType(elemType(tp.tp1), elemType(tp.tp2))
486-
case tp @ AndType(tp1, tp2) =>
487-
if sourceVersion.enablesDistributeAnd
488-
then tp.derivedAndType(elemType(tp1), elemType(tp2))
489-
else OrType(elemType(tp1), elemType(tp2), soft = false)
490-
case _ =>
491-
tp.baseType(from).argInfos.headOption.getOrElse(defn.NothingType)
492-
end elemType
483+
case tp: AndType => tp.derivedAndType(elemType(tp.tp1), elemType(tp.tp2))
484+
case _ => tp.baseType(from).argInfos.headOption.getOrElse(defn.NothingType)
493485
val arg = elemType(self)
494486
val arg1 = if (wildcardArg) TypeBounds.upper(arg) else arg
495487
to.typeRef.appliedTo(arg1)

‎compiler/src/dotty/tools/dotc/core/TypeComparer.scala‎

Lines changed: 6 additions & 8 deletions
Original file line numberDiff line numberDiff line change
@@ -2460,8 +2460,7 @@ class TypeComparer(@constructorOnly initctx: Context) extends ConstraintHandling
24602460

24612461
/** If the range `tp1..tp2` consist of a single type, that type, otherwise NoType`.
24622462
* This is the case if `tp1 =:= tp2`, but also if `tp1 <:< tp2`, `tp1` is a singleton type,
2463-
* and `tp2` derives from `scala.Singleton` and `sourceVersion.enablesDistributeAnd` (or vice-versa).
2464-
* Examples of the latter case:
2463+
* and `tp2` derives from `scala.Singleton` (or vice-versa). Examples of the latter case:
24652464
*
24662465
* "name".type .. Singleton
24672466
* "name".type .. String & Singleton
@@ -2474,10 +2473,8 @@ class TypeComparer(@constructorOnly initctx: Context) extends ConstraintHandling
24742473
def isSingletonBounds(lo: Type, hi: Type) =
24752474
lo.isSingleton && hi.derivesFrom(defn.SingletonClass) && isSubTypeWhenFrozen(lo, hi)
24762475
if (isSameTypeWhenFrozen(tp1, tp2)) tp1
2477-
else if sourceVersion.enablesDistributeAnd then
2478-
if (isSingletonBounds(tp1, tp2)) tp1
2479-
else if (isSingletonBounds(tp2, tp1)) tp2
2480-
else NoType
2476+
else if (isSingletonBounds(tp1, tp2)) tp1
2477+
else if (isSingletonBounds(tp2, tp1)) tp2
24812478
else NoType
24822479
}
24832480

@@ -2774,7 +2771,7 @@ class TypeComparer(@constructorOnly initctx: Context) extends ConstraintHandling
27742771
* @pre !(tp1 <: tp2) && !(tp2 <:< tp1) -- these cases were handled before
27752772
*/
27762773
private def distributeAnd(tp1: Type, tp2: Type): Type = tp1 match {
2777-
case tp1 @ AppliedType(tycon1, args1) if sourceVersion.enablesDistributeAnd =>
2774+
case tp1 @ AppliedType(tycon1, args1) =>
27782775
tp2 match {
27792776
case AppliedType(tycon2, args2)
27802777
if tycon1.typeSymbol == tycon2.typeSymbol && tycon1 =:= tycon2 =>
@@ -2822,7 +2819,8 @@ class TypeComparer(@constructorOnly initctx: Context) extends ConstraintHandling
28222819
}
28232820

28242821
/** Try to distribute `|` inside type, detect and handle conflicts
2825-
* Note that a disjunction cannot be pushed into a refined or applied type. Example:
2822+
* Note that, unlike for `&`, a disjunction cannot be pushed into
2823+
* a refined or applied type. Example:
28262824
*
28272825
* List[T] | List[U] is not the same as List[T | U].
28282826
*

0 commit comments

Comments
(0)

AltStyle によって変換されたページ (->オリジナル) /