diff options
| -rw-r--r-- | compiler/src/dotty/tools/dotc/typer/Typer.scala | 12 | ||||
| -rw-r--r-- | tests/run/i1991.scala | 9 |
2 files changed, 14 insertions, 7 deletions
diff --git a/compiler/src/dotty/tools/dotc/typer/Typer.scala b/compiler/src/dotty/tools/dotc/typer/Typer.scala index 820044b8e..498fd001b 100644 --- a/compiler/src/dotty/tools/dotc/typer/Typer.scala +++ b/compiler/src/dotty/tools/dotc/typer/Typer.scala @@ -1128,15 +1128,13 @@ class Typer extends Namer with TypeAssigner with Applications with Implicits wit def typedBind(tree: untpd.Bind, pt: Type)(implicit ctx: Context): Tree = track("typedBind") { val pt1 = fullyDefinedType(pt, "pattern variable", tree.pos) val body1 = typed(tree.body, pt1) - typr.println(i"typed bind $tree pt = $pt1 bodytpe = ${body1.tpe}") body1 match { - case UnApply(fn, Nil, arg :: Nil) if tree.body.isInstanceOf[untpd.Typed] && !body1.tpe.isError => - // A typed pattern `x @ (_: T)` with an implicit `ctag: ClassTag[T]` - // was rewritten to `x @ ctag(_)`. - // Rewrite further to `ctag(x @ _)` - assert(fn.symbol.owner == defn.ClassTagClass) + case UnApply(fn, Nil, arg :: Nil) if fn.symbol.owner == defn.ClassTagClass && !body1.tpe.isError => + // A typed pattern `x @ (e: T)` with an implicit `ctag: ClassTag[T]` + // was rewritten to `x @ ctag(e)` by `tryWithClassTag`. + // Rewrite further to `ctag(x @ e)` tpd.cpy.UnApply(body1)(fn, Nil, - typed(untpd.Bind(tree.name, arg).withPos(tree.pos), arg.tpe) :: Nil) + typed(untpd.Bind(tree.name, untpd.TypedSplice(arg)).withPos(tree.pos), arg.tpe) :: Nil) case _ => val sym = newPatternBoundSym(tree.name, body1.tpe, tree.pos) assignType(cpy.Bind(tree)(tree.name, body1), sym) diff --git a/tests/run/i1991.scala b/tests/run/i1991.scala index 524a3f311..cec1dec89 100644 --- a/tests/run/i1991.scala +++ b/tests/run/i1991.scala @@ -10,6 +10,15 @@ class A[Foo](implicit tag: ClassTag[Foo]) { //case foo: Foo => true case _ => false } + + def testBind(x: Any) = x match { + case foo0: Foo => + (foo0: Foo) + case foo1 @ (_: Foo) => + (foo1: Foo) + case foo2 @ ExtractFoo() => + (foo2: Foo) + } } object Test { |