diff options
Diffstat (limited to 'src/dotty/tools/dotc/core/SymDenotations.scala')
| -rw-r--r-- | src/dotty/tools/dotc/core/SymDenotations.scala | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/src/dotty/tools/dotc/core/SymDenotations.scala b/src/dotty/tools/dotc/core/SymDenotations.scala index 9299e7e63..e179a11a7 100644 --- a/src/dotty/tools/dotc/core/SymDenotations.scala +++ b/src/dotty/tools/dotc/core/SymDenotations.scala @@ -255,9 +255,12 @@ object SymDenotations { isModuleClass && linkedClass.isNonBottomSubClass(base) /** Is this symbol a class that does not extend `AnyVal`? */ - def isNonValueClass(implicit ctx: Context): Boolean = + final def isNonValueClass(implicit ctx: Context): Boolean = isClass && !isSubClass(defn.AnyValClass) + /** Are the contents of this denotation invariant under the type map `f`? */ + def isInvariantUnder(f: Type => Type)(implicit ctx: Context) = info eq f(info) + /** Is this definition accessible whenever `that` symbol is accessible? * Does not take into account status of protected members. */ @@ -497,7 +500,7 @@ object SymDenotations { override protected def newLikeThis(s: Symbol, i: Type): SingleDenotation = new UniqueRefDenotation(s, i, validFor) /** Copy this denotation, overriding selective fields */ - def copy( + def copySym( sym: Symbol, owner: Symbol = this.owner, name: Name = this.name, @@ -798,6 +801,11 @@ object SymDenotations { decls.denotsNamed(cname).first.symbol } + override def isInvariantUnder(f: Type => Type)(implicit ctx: Context) = + (parents.mapConserve(f) eq parents) && + (f(selfType) eq selfType) && + (decls forall (_.isInvariantUnder(f))) + def copyClass( sym: ClassSymbol, owner: Symbol = this.owner, |