diff options
Diffstat (limited to 'src/dotty/tools/dotc/core/TypeComparer.scala')
| -rw-r--r-- | src/dotty/tools/dotc/core/TypeComparer.scala | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/src/dotty/tools/dotc/core/TypeComparer.scala b/src/dotty/tools/dotc/core/TypeComparer.scala index 88f563cb9..b1081e433 100644 --- a/src/dotty/tools/dotc/core/TypeComparer.scala +++ b/src/dotty/tools/dotc/core/TypeComparer.scala @@ -79,12 +79,11 @@ class TypeComparer(initctx: Context) extends DotClass { * otherwise it is approximated by its upper bound. However, any occurrences * of the parameter in a refinement somewhere in the bound are removed. * (Such occurrences can arise for F-bounded types). - * The type parameter is removed from the constraint's domain and all its - * occurrences are replaced by its approximation. + * The constraint is left unchanged. * @return the instantiating type * @pre `param` is associated with type bounds in the current constraint. */ - def approximate(param: PolyParam, fromBelow: Boolean): Type = { + def approximation(param: PolyParam, fromBelow: Boolean): Type = { val avoidParam = new TypeMap { override def apply(tp: Type) = mapOver { tp match { @@ -97,7 +96,6 @@ class TypeComparer(initctx: Context) extends DotClass { val bound = if (fromBelow) bounds.lo else bounds.hi val inst = avoidParam(bound) println(s"approx ${param.show}, from below = $fromBelow, bound = ${bound.show}, inst = ${inst.show}") - constraint = constraint.replace(param, inst) inst } |